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This standard is in the original People's Republic of China Ministry of metallurgical industry
After the implementation of this standard, each industry shall, in accordance with the provisions of this standard, amend or abolish the original "Safety Regulations for Mineral Processing" promulgated.
This standard is proposed and managed by the Safety Production Bureau of the National Economic and Trade Commission of the People's Republic of China.
This standard was drafted: Safety and Environmental Protection Research Institute of the Ministry of Metallurgical Industry.
Participated in the drafting of this standard: Shandong Longkou City Gold Mining and Metallurgy Company.
The main drafters of this standard: Pang Qizhi, Li Wenyong, Wang Honghan, Chu Yuanmin, Shen Chuanping, Li Xiaofei, Zhang Zhong, Qu Xin, Sun Jiashou, Zhang Ao Shi, Fang Heping.
1 range
This standard specifies the site selection and plant layout, beneficiation process and tailings facilities, transportation, lifting, electrical, fire protection and other safety technologies and industrial hygiene requirements.
This standard applies to metallurgical (including color), chemical, building materials and other industries of the mineral processing plant.
Some enterprises that use the beneficiation process can also refer to implementation.
This standard does not apply to the election of coal plants and nuclear industry uranium mining and metallurgy plant.
2 reference standard
The provisions contained in the following standards constitute provisions of this standard by reference in this standard. At the time of publication, the editions indicated were valid. All standards will be revised and parties using this standard should explore the possibility of using the latest version of the following standards.
GB 146.1-1983 standard gauge railway rolling stock clearance
GB 146.2-1983 standard gauge railway construction boundary
GB 4053.1—1993 Fixed steel straight ladder safety technical conditions
GB 4053.2—1993 Safety technical conditions for fixed steel inclined ladder
GB 4053.3—1993 Safety technical conditions for fixed industrial protective railings
GB 4053.4—1993 fixed industrial steel platform
GB 4387—1994 Safety regulations for railway and road transportation in industrial enterprises
GB 4792-1984 Basic standards for radiation health protection
GB 5749-1985 sanitary standard for drinking water
GB/T 6067-1985 safety regulations for lifting machinery
GB 6222—1986 Gas safety regulations for industrial enterprises
GB 6722-1986 blasting safety regulations
GB 8196—1987 Safety requirements for protective covers for mechanical equipment
GB 8197-1987 protective screen safety requirements
GB 8703-1988 radiation protection regulations
GB 11806-1989 Regulations for the safe transport of radioactive materials
GB/T 14784-1993 Belt conveyor safety specification
GB 50053—1994 Design specifications for substations of 10kV and below
GB 50070-1994 Mine Power Design Specification
GBJ 12-1987 Industrial Enterprise Standard Gauge Railway Design Specification
GBJ 16-1987 Building Design Fire Protection Code
GBJ 22-1987 factory mine road design specification
3 definition
This standard uses the following definition.
3 . 1 dressing ore dressing
Using the differences in physical, physicochemical or chemical properties of different minerals, separating useful minerals in the ore from gangue minerals under specific process conditions, or separating the various useful minerals from each other to obtain one or several A relatively enriched working process of useful minerals.
3 . 2 ore dressing plant ore dressing plant
Including a mineral processing plant with an independent legal entity and a mineral processing plant affiliated with a mining enterprise, it refers to land, buildings and work sites that are used or can be used for mineral processing.
4 management
4 . 1 The mineral processing plant shall establish and improve the safety production responsibility system.
4 . 2 The factory department shall set up a safety agency or a full-time safety officer, which shall be directly led by the factory manager; the workshop shall set up a full-time or part-time safety officer; the team shall set up a part-time safety officer.
The full-time security officer is a person who has graduated from a secondary professional school (or equivalent), has the necessary safety expertise and safe work experience, has been engaged in the professional work of the mineral processing plant for more than 5 years and can often go to the site.
4 . 3 Establish and improve the safety inspection system. The factory shall check at least once a quarter, and the workshop shall be inspected at least once a month. The problems identified shall be resolved within a time limit.
4 . 4 Safety production education should be carried out, knowledge of safety knowledge and safety regulations should be popularized, technical business training should be strengthened, and all employees should be regularly trained and evaluated. [next]
4 . 5 Special operations personnel should obtain an operation qualification certificate or license before they can be employed.
4 . 6 New workers entering the factory should first carry out safety education. After passing the examination, the skilled workers will lead the work for at least four months. They will be familiar with the operation technology of this type of work and pass the examination before they can work independently.
For labor, visits, and interns, safety education should also be conducted before entering the factory.
4 . 7 Those who change jobs or leave the position for more than half a year should re-train their position safety technology. When using new processes, new technologies, and new equipment, special training should be provided to relevant personnel.
4 . 8 Labor protection articles shall be distributed to employees in accordance with regulations. Personnel entering the factory shall wear labor protection articles as required.
4 . 9 Lighting and warning signs should be provided in the hazardous area.
4 . 10 Operators should not drink alcohol or take narcotic drugs before going to work. They should not leave the post, change their posts or leave the post without permission.
4 . 11 For flammable and explosive materials, toxic and hazardous chemicals, pharmaceuticals for testing, and radioactive elements, strict storage, distribution, preparation and use systems shall be established, and designated personnel shall be assigned to manage them.
4 . 12 Safety facilities shall be designed, constructed and put into operation at the same time as the main project.
4 . 13 In the event of casualties or other major accidents, the factory manager or his agent shall immediately go to the scene to direct the organization to rescue and take effective measures to prevent the accident from expanding.
The investigation, report and handling of accidents shall be carried out in accordance with relevant state regulations.
5.1.2 Select the site, avoiding karst, drifting sand, silt, collapsible loess, faults, landslides, mudslides, landslides and other unfavorable geological sections; otherwise, reliable safety measures should be taken.
5.1.3 The site should not be selected within the underground mining area collapse limit and open-pit blasting danger zone, nor should it be selected within the minimum safe distance of the explosives processing plant, blasting equipment store and oil depot.
5.1.4 The site should be avoided in the earthquake fault zone and the area where the basic intensity is higher than 9 degrees; otherwise, it should be fortified according to the relevant national seismic regulations.
5.1.5 The site should be protected from flooding. The design elevation of the site should be higher than the local calculated water level by more than 0.5m.
5.1.6 When building a factory in a residential area, the site should be located on the upwind side of the residential area in the minimum wind direction. When building a plant in a mountainous area, it should be based on the local
5.1.7 The standard value of the bearing capacity of the general construction structure foundation soil should be greater than 150kPa (1.5kgf/cm 2 ); the standard value of the bearing capacity of the main construction foundation soil should be greater than 250kPa (2.5kgf/cm 2 ) . If the bearing capacity of the foundation soil does not meet the requirements, the foundation should be properly disposed of.
5.1.8 The tailings pond should be as far away as possible from densely populated areas or places with important facilities. The tailings should not be discharged directly into rivers, rivers, lakes and seas.
5.2 Plant layout 5.2.1 When determining the location of a building, the following provisions should be observed:
——The main buildings with large loads (broken rooms, grinding rooms, concentrate bins, etc.) are arranged in areas with good geological conditions.
- workshops that produce soot and toxic and harmful gases, placed on the edge of the plant and on the upwind side of the minimum wind direction in the workshop where no toxic and harmful gases are produced;
- The roasting plant and the gas generating station are arranged on the upwind side of the plant in the direction of minimum wind frequency.
5.2.2 The fire separation distance between the buildings and the arrangement of the fire lanes shall comply with the relevant provisions of GBJ 16. Warehouses for storing inflammable and explosive materials shall be placed on the upwind side of the building in the direction of minimum wind frequency, and on the downwind side of the minimum wind direction of buildings that often emit sparks and open flames.
5.2.3 The fire lanes of the factory buildings, warehouses and combustible material yards (also available for transportation roads) shall be provided, and the width shall be not less than 3.5m. At the end of the fire lane, there should be a return lane or a return yard of not less than 12m × 12m. 5.2.4 Avoid placing part of the building at the riverside or low-lying area, while the other part is placed at a high place.
5.2.5 The layout of railways and roads in the factory shall comply with the relevant provisions of GB 4387, GB 146.1, GB 146.2, GBJ 12 and GBJ 22.
5.2.6 When transporting by aerial ropeway, the ropeway should not pass through the factory area or residential area; when the ropeway passes over the railway and the road, safety measures should be taken.
5.2.7 The distance between the flotation reagent reservoir and the grease reservoir to the inlet well and the fan diffuser shall not be less than the following:
Storage and oil volume less than 10m 3 - 20m
Storage and oil volume 10~50m 3 ——30m
Storage and oil volume 50~100m 3 ——50m
Storage and oil volume is greater than 100m 3 - 80m
6 Basic regulations 6.1 The floor and floor of the workshop shall have appropriate slope; the floor shall be provided with floor drains and the ground shall be provided with drainage ditch.
6.2 The plant shall be provided with a floor washing facility. The water supply points for washing the plant platform and the corridor should be arranged according to the principle of convenient washing, and the spacing should not exceed 30m. Flushing sewage should be discharged by self-flow, and a summary sewage pool, sewage pumping station and corresponding safety protection facilities should be set at the lowest point of the whole plant.
6.3 Around the platform and around the hole, a water retaining fence of not less than 100 mm shall be built; the trench shall be provided with a shovel cover with a gap of not more than 20 mm.
6.4 Lighting, gutters, sinks and sewage pumps shall be provided in the basement and underpass, and shall be inspected regularly.
6.5 The seismic grades of the buildings and structures arranged in the earthquake zone shall comply with the relevant national regulations.
6.6 The cantilever structure should not be arranged in the workshop; when the cantilever structure is required for the process arrangement, the length of the cantilever should be less than 2.0m, and the equipment with large weight and large vibration should not be arranged in the cantilever part.
6.7 For equipment with heavy loads and high vibration, the foundation shall not be located on the platform but shall be located on the foundation. Special reinforcement measures should be taken when the operating platform has concentrated loads.
6.8 For buildings of more than 60m in length, there should be two main stairs. The stair angle of the main passage should be no more than 45°; the inclination of the pedestrians with infrequent stairs can reach 60°. The clearance height above each step of the stairs shall be not less than 2.2m. The pedestrian passage under the stair rest platform shall have a net width of not less than 2.0 m.
6.9 The width of the main operation channel in the plant shall be not less than 1.5m, the width of the general equipment maintenance channel shall not be less than 1.0m, and the clearance height of the channel shall be less than 2.0m.
6 . When the slope of 10 channels reaches 6°~12° , anti-slip strips should be added; when the slope is greater than 12° , steps should be set. Non-slip measures should be taken for floors that often have slippery substances such as water and grease.
6 . 11 height exceeds
6 . 12 crossovers, passages and ladders should be made of patterned steel plates. The production of straight ladders, inclined ladders, railings and platforms shall comply with the requirements of GB 4053.1 , GB4053.2 , GB4053.3 and GB4053.4 respectively.
6 . 13 Railings, platforms and ladders should be inspected, maintained and cleaned regularly.
6 . 14 The entrances and exits of the ladders and passages shall not be located in the frequent passages of railways and vehicles; otherwise, protective devices shall be provided and eye-catching warning signs shall be hung.
6 . At the 15th crossing, there should be eye-catching warning signs and protective facilities at locations where objects collide and fall.
6 . 16 The exposed part of the equipment shall be provided with a protective cover or a protective screen. The protective cover and protective screen shall meet the requirements of GB 8196 and GB 8197 respectively.
6 . 17 The switch and operation box of the equipment should be located near the equipment for easy operation. Interconnected equipment switches and operating boxes should be placed centrally. The installation height of the main equipment motor should be easy for the operator to inspect and maintain; if it is difficult to meet, a local operating platform should be provided.
6 . All kinds of pipelines and chutes in the 18 factory should not hinder operation and walking.
6 . 19 is higher than
6 . 20 roofing houses to be inspected or frequently cleaned, height greater than
6 . 21 Plants should have sufficient space for equipment (components) assembly and maintenance. [next]
6 . 22 equipment maintenance space, access should meet the following requirements:
- According to various loading and unloading direction of the access member, the size and position of the member to determine a reasonable maintenance space, equipment and other structures should not be set within the range of the service space;
- maximum crane lifting member and the fixed member device, the maximum clearance dimension between the contour of the facilities, not less than
- hoisting crane, maintenance of equipment and components, to be disposed within the spatial range of a crane hook lifting can vertically;
- overhaul of crane with a lifting height, should meet the needs of equipment maintenance work;
- cranes and lifting equipment needed by the platform member or a wall, the wall should be disposed lifting platform or passage openings, and the gap passage opening peripheral device or component is not less than
- lifting hole equipment to be provided or a protective railing movable cover, and each side of the lifting device out of the hole should be made active railings;
- building walls and above the second layer is provided with lifting the sliding door, the sliding door should be set at a high
6 . 23 The beam and slab load of the overhaul site shall be considered according to the full load; when the heavy load may occur in the whole assembly heavy equipment, reinforcement measures shall be taken.
6 . 24 When repairing the equipment, the safety device and dust removal equipment should be overhauled. It should be reinstalled immediately after inspection and should not be disposed of at will.
6 . 25 After the equipment is large and medium-sized, it shall be inspected and accepted by the competent technical person in charge of the factory (workshop), the person in charge of safety, and the equipment user. If it is unqualified, it shall be repaired.
6 . 26 The maintenance equipment should be cut off beforehand, use the operation card to change the power card, and hang the “ No Start †sign on the operation box to start the operation.
6 . 27 In an inadequately lit place or at night, there should be sufficient lighting.
6 . 28 Multi-layer work or dangerous work, should be guarded by special personnel and take protective measures.
6 . 29 When watering the zinc alloy, there should be no water at the site, and the castings should be dried and preheated to 80~
6 . 30 For high-altitude operations (including slopes above 45° ), seat belts should be worn.
6 . 31 When encountering high winds of level 6 or above, work in open air should not be carried out.
7 craft
7 . 1 general provisions
7 . 1 . 1 The following operations of the running equipment should be stopped:
- handling failures;
- replacement parts;
- partial adjustment of equipment components;
- adjust the belt tightness;
- Cleaning equipment.
7 . 1 . 2 Personnel should not enter the ore flow space.
7 . 1 . 3 Personnel enters the internal or upper part of the equipment that has stopped running. Before using the operation card to change the power card, cut off the power supply, lock the power switch, hang the signboard of “ some people work, no closing †, and set up special supervision.
7 . 1 . 4 The sampling points of raw ore, concentrate and tailings should be located in a location that is convenient for sampling, safe and secure.
7 . 2 crushing and screening
7 . 2 . 1 When parking the fixed grid sieve mine, coarse crusher shed mine (stron ore ore iron ore) and entering the body inspection and treatment failure, the following provisions shall be observed:
- the worker should wear a seatbelt, the length of the working point only;
- set up special guardianship;
——Before entering the body, pre-treat the nuggets attached to the wall of the ore tank or the scum that may fall off.
7 . 2 . 2 Fixed grid and coarse crusher are surrounded by the ore tank (except for the ore side or the dump side), and the tank of the spiral classifier is close to the ore discharge end of the grinding machine.
7 . 2 . 3 If the coarse crusher has no feeding equipment , the dumper should be turned over under normal operating conditions, or operated according to the equipment operating rules, and should not be turned over in the parking state.
7 . 2 . 4 When lifting a large ore with a crane, the ore should be tied and hung, and the person should be slowly hoisted by a special person. There should be no one under the hanging object.
7 . 2 . 5 When it is necessary to stop the cone crusher discharge port, it should be measured with a plumb or other tools, then stop and cut off the power before adjustment. If it is necessary to enter the machine to measure the discharge port, the necessary safety precautions should be taken. [next]
7 . 2 . 6 When cleaning up the rough crusher at the dumping site, the operator should wear a seat belt and should be guarded by a special person.
7 . 2 . 7 When handling the jaw crusher (blocking) ore, the ore to the head of the mining machine should be treated first, and then processed from the upper part; it should not be treated in the direction of the turning wheel or upward from the lower part of the discharging port. When entering the feed port of the jaw crusher, it should be equipped with a seat belt and guarded by a special person.
7 . 2 . 8 When handling the lower funnel of the jaw crusher, it should be in contact with the upper and lower work positions, disconnect the power switch of the equipment, and set up special personnel for monitoring.
7 . 2 . 9 Dry screening operations should have dust removal facilities and work in a sealed state. The sealing device should have a door opening for easy inspection and observation.
7 . 2 . 10 When the sieve is crushed due to overload, it should be stopped first, then treated with a special equipment to compress the V-belt, and should not be treated with a stick and a V-belt.
7 . 3 grinding and grading
7 . 3 . 1 Both sides of the grinding machine and the side of the bearing bush should have protective railings. When the grinding machine is running, personnel should not stay or work on both sides and lower parts of the running cylinder; and should always observe whether the manhole door is tight and prevent the grinding medium from flying out and injuring people. When closing the manhole of the grinding machine, it should be confirmed that no one is inside the grinding machine before it can be closed.
7 . 3 . 2 When repairing and replacing the grinding machine liner, the drum should be fixed in advance, and it is confirmed that there is no falling off in the body, ventilation and ventilation are sufficient, and the temperature is suitable before entering. The hook of the crane should not enter the body.
7 . 3 . 3 When the grinding machine is leaking or tightening the cylinder screw, the roller should be fixed; if the grinding machine is seriously eccentric, the eccentricity should be eliminated first and then processed.
7 . 3 . 4 When the ball mill is " swelling belly " , the feeding should be stopped immediately, and then the principle of " pre-water closure, post-water addition, increase of grading concentration and return to sand " should be applied.
7 . 3 . 5 When adding a ball to the ball mill with a special steel bucket, the steel sphere inside the bucket should be lower than the upper edge of the bucket; when the ball is added to the ball mill by the electric disk, there should be no one under the suction cup; the bag is not used to lift the steel ball.
7 . 3 . 6 rod mills add grinding media and should be stopped. When adding a medium using a machine, check the parts of the machine beforehand and confirm that it is in good condition. The loading machine should be operated by a special person and should be closely coordinated with the crane and directed by a special person.
7 . 3 . 7 The grinding machine has been parked for more than 8 hours or the replacement of the lining is completed. In the case of no micro-towing facilities, the crane should be used before the driving, and the wire rope should be inspected beforehand; the main motor should not be used.
7 . 3 . 8 When checking the scooping of the sprinkler, the operator should stand on the side of the running direction of the scoop and should not stand on the front.
7 . 3 . 9 When the sanding tank of the grading equipment is blocked, it should not be climbed on a classifier, linear vibrating screen or other equipment.
7 . 3 . 10 When removing the waste residue such as wood chips on the slag slag from the grading equipment, it should not be carried out on the slag scorpion.
7 . 4 sand mining
7 . 4 . 1 The working sand mining ship should be in a normal floating state, the hull is stable, and the inclination angle is less than 0.5° .
7 . 4 . 2 During the sand mining operation, no other work should be carried out in the installation area on the shore of the sand and side ropes of the sand mining ship.
Over-exploitation areas should take measures to prevent disasters such as landslides, landslides and mudslides.
7 . 4 . 3 There shall be no unfixed objects on all decks of the sand mining ship, and the operation platform, ladders and sidewalks shall be kept open.
7 . 4 . 4 The load of the sand mining vessel should not be arbitrarily increased. Personnel should not gather one side or one end of the hull. Unrelated personnel should not board the ship.
7 . 4 . 5 The safe water level and minimum mining width of the sand mining ship shall be specified in the design. When the sand mining vessel is working, the freeboard height should not be less than
7 . 4 . 6 The distance from the surface of the building to the edge of the mining pond shall not be less than
7 . 4 . 7 When the sand mining vessel is in operation, all personnel and vessels shall not stay or pass within its radius of gyration.
7 . 4 . 8 Power cables should be kept well insulated; the parts laid on the surface should have warning signs; the parts on the water should be laid on the pontoons or wooden rafts.
7 . 4 . 9 The control switches, instruments and winch travel switches of the cab should be sensitive and reliable. Motors that have not been activated for a long time or are damp shall be insulated by an electrical test and approved by an electrician before they can be activated.
7 . 4 . 10 During high winds, heavy fog and floods, ships and ships should not be carried out unless there are reliable safety measures.
When the wind speed exceeds
7 . 4 . Water level alarms, lighting, signals, communications and ambulance equipment should be provided on the 11 sand mining vessels.
7 . 5 sorting
7 . 5 . 1 gravity dressing
7 . 5 . 1 . 1 spiral chute should be 2m~ according to height
7 . 5 . 1 . 2 When the centrifugal concentrator is running, the head should not be extended into the rotating cylinder for inspection. Adjust the position and angle of the nozzle to the mine, the washing nozzle and the unloading water nozzle, and stop it. [next]
7 . 5 . 1 . 3 When the feeding ore hopper and the solenoid valve of the centrifugal concentrator are blocked, the triangle ladder is used for treatment.
7 . 5 . 1 . 4 The jigging machine layer should be cleaned once a week to remove debris from the sieve screen and check the sieve plate and its fixing.
7 . 5 . 2 magnetic dressing
7 . 5 . 2 . 1 When adjusting the dry-selecting magnetic pulley blanking material dividing plate, the operator should stand on the side of the magnetic pulley to prevent the minerals from smashing and injuring people.
7 . 5 . 2 . 2 When entering the ore block or other objects between the belt of the dry selection magnetic pulley and the drum, it should be handled under the supervision of others; it should not be removed with iron rods, iron pipes or other tools while the magnetic pulley is running.
7 . 5 . 2 . Before the operation of the 3 strong magnetic separator, all the objects that may be attracted by the magnetic force should be removed; objects such as iron bars and hammers that can be attracted by the magnetic force should not be brought around the equipment.
7.5.2.4 The electric separator shall be installed in a dry, ventilated place, and the operator shall avoid contact with the high frequency cable during operation.
7.5.2.5 The electric separator mainframe and high-voltage electrostatic generator should be placed as close as possible. Rubber insulated floor can be laid in front of the high voltage static generator and the electric machine.
7.5.2.7 The main body of the electric separator and the high-voltage electrostatic generator shall be connected to the grounding trunk by separate branch lines, and shall not be connected in series.
7.5.2.8 After the high-voltage disconnection, the residual electric charge on the high-voltage electrode of the electric separator is released by applying a grounding discharger to contact or repair these parts.
7.5.3 Flotation 7.5.3.1 When starting the flotation equipment , it should be confirmed that there are no objects in the machine and no obstacles. The flotation cell in operation should be prevented from falling into iron objects and other obstacles that may affect operation.
7.5.3.2 Replace the V-belt of the flotation machine and stop it. When the V-belt is loose, do not use a stick to press or use a wire to hook the V-belt.
7.5.3.3 Replace the stirrer of the mechanical agitation flotation machine, apply steel wire rope lifting, and do not use triangle belt and rope lifting.
7.5.3.4 It shall not be operated on the slurry mixing tank. The slime splashed on the end face of the tank wall should be washed regularly with water.
7.5.3.5 The flotation machine feed pipe, return sand pipe, discharge pipe and gate valve shall be kept intact, smooth and flexible, and the blockage and wear shall be treated in time.
7.5.3.6 When the flotation machine tank has to be shut down due to wear and leakage of slurry or agitator, the slurry in the tank should be emptied and rinsed with water.
7.5.3.7 When the flotation machine suddenly trips, the power switch should be cut off immediately, and the ball mill should be notified to stop feeding.
7.5.3.8 Adjust the dosage by using a cup-type drug dispenser, and stop it.
7.5.3.9 The dispensing room should be set separately and should be equipped with ventilation. When crushing solid pharmaceuticals manually, there must be no one on the front.
7.5.3.10 If a toxic agent or a flotation process with odorous agents is used, or if a large amount of steam is generated during the process, a ventilation and ventilation device shall be provided.
7.5.4 Roasting 7.5.4.1 The use of gas shall be carried out in accordance with the relevant provisions of GB 6222.
7.5.4.2 The ignition of the roasting shaft furnace shall be carried out according to the following procedures:
a) Start the exhaust fan for 10~15min;
c) After passing the gas burst test, ignite the heating burner with a torch;
d) When starting heating, the gas should be given less. After normal, increase the amount of gas one by one.
7.5.4.3 The roasting shaft furnace shall be operated under negative pressure and shall not leak air.
7.5.4.4 When entering the roaster, the heating and reduction gas pipes should be blocked first. To overhaul the gas pipeline, the gas should be drained beforehand by steam or nitrogen.
7.5.4.5 After the eye is scratched, the magnetic block is applied to block the fire to prevent gas leakage.
7.5.4.6 In front of the furnace, the top platform, the combustion chamber platform, and the unloading platform, unrelated personnel should not stay.
7.5.4.7 The oven shall comply with the following regulations:
Foreword March 12 , 1988 Based on the “Safety Regulations for Mineral Processing †promulgated and implemented, the “ Scope †, “ Reference Standards †, “ Definitions †, “ Fire Prevention †and “ Industrial Hygiene †sections have been added to cover the contents of the concentrating plants in the chemical and building materials industries. And the overall content has also been greatly enriched, is the national unified mineral separation safety standards.
5 Site selection and plant layout 5.1 Site selection 5.1.1 Selecting the site should be based on complete terrain, engineering geology, hydrogeology, earthquake, meteorological and environmental impact assessment.
Community weather, determine the location of the plant and residential areas.
When the ropeway crosses the high-voltage line, the relevant national regulations shall be implemented. [next] 0.6m The platform shall be provided with railings; the holes in the platform shall be provided with railings or cover plates; if necessary, safety protection plates shall be provided at the edge of the platform. 10m Buildings, if the roof is flammable, it should be installed outdoors. 3m Width is not less than 500mm Fixed fire steel straight ladder. 6m The fixed steel straight ladder for maintenance shall be provided; the height difference between the two roofs of the multi-storey building is greater than 2m Should have a straight ladder; the height of the eaves is greater than 10m , should be placed on the side of the guardrail, less than 10m , can be set up with safety hooks, the hook spacing should be no more than 6m . 400mm ; 300mm ; 1.05m The partition wall or the detachable protective railing shall be installed, and the girders shall not protrude beyond the wall. 2m . 120 ° C It should not be watered in the open air on rainy days. 0.2m When the sand mining vessel crosses the river, the difference between the river elevation and the water surface elevation of the mining pond shall not be greater than 0.5m When the water level of the sand-collecting ship crossing the river is lower than the safe water level, the dam should be built to raise the water level, and the over-excavation floor method should not be used to cross the river. 30m The distance from the equipment to the edge of the mining pond shall not be less than 5m The distance from the person to the side of the mining pond should not be less than 2m . 15m /s should stop and take windproof measures; wind speed exceeds 20m /s should take measures to prevent overturning or major equipment accidents. 2.5m Set up a layered operating platform.
7.5.2.6 When the electric separator is fed by round roller or electromagnetic vibration, the transmission motor or electromagnetic vibrator of the feeding device shall be interlocked with the high-voltage electrostatic generator. Before the high voltage is connected, the feed drive motor or electromagnetic vibrator cannot be started; after the high voltage trip, the feed drive motor or electromagnetic vibrator should stop working immediately.
b) open the heated gas end of the furnace to release the tube for 5 min;