Exploratory testing has become an optional test, focusing on the research and exploration of the differences in the nature and selectivity of various types and grades of ore, the basic beneficiation methods and the possible mineral processing indicators, the difficulty of removing harmful impurities, and the comprehensive recovery of the generated fractions. Possibility, etc. The content and depth of the experimental study should be able to determine whether the exploration of the ore used in the exploration is technically feasible and economically reasonable, and can provide a basis for the formulation of industrial indicators and mineral deposit evaluation. However, exploratory tests are generally carried out by the geological survey department, and the depth does not meet the requirements of beneficiation design, so it cannot be used as a design basis. Exploratory testing gold ore typically includes three parts, test re-election, flotation, leaching tests, in general, due to the different requirements of the three test grinding fineness, the basic weight can float accordance with the first and then leaching Principles to implement. Reselection test Currently recognized as the best re-election equipment is the Nielsen centrifugal re-election machine, which also has small equipment for the laboratory, but because of the high price (about 300,000 yuan), the general laboratory is rarely equipped, so most of the exploration The re-election part of the test is realized by a shaker. The shaker has a grain size range for the recovery of heavy minerals. In the test, the fine products are not easy to enter the concentrate, so usually when the grinding fineness is 120 mesh, accurate. For the presence of gold-bearing quartz veins of gold fissure, re-election can get very high concentrate grade, but it is impossible to obtain a good indicator of recovery, if indeed find re-election difficult to achieve effective recycling, we can make use of ore were floating Select the test, if the effect is better, you can use the re-election of tailings for flotation. Nielsen centrifugal reselector Flotation test The vast majority of the flotation part of the exploratory test is based on experience. When we select the ore or re-select the tailings for the test, we first consider the fineness of the grinding in the -200 mesh to account for 65%. In fact, this fineness is not the best grinding fineness of the ore, but a fineness that is easier to achieve in industrial production. Under normal circumstances, the industrial grinding system usually has a concentration of 32 when grinding to this fineness. -35%, in line with the general requirements for flotation concentration. Most of the flotation experiments in gold mines consider a rough three-sweeping and three-finishing process. Exploring experiments rarely do closed-circuit tests. Therefore, the closed-circuit test results we see are often fitted by open-circuit test data, so it is not so Have practical reference value. If we must carefully analyze the data, we can basically determine the rough recovery rate as the final recovery rate. Swirl static microbubble flotation column Leach test It seems that in most people's understanding, leaching is the most violent and effective method of gold extraction. The leaching test generally grinds ore to -325 mesh, which accounts for about 95%, and the leaching time starts from 12 hours, 48 ​​hours, leaching. There are four final products, tailings, nobles, lean liquids, carbon, recovery of leaching by tailings, and recovery of adsorption by precious and poor liquids, but one key data is often overlooked. That is, the saturated adsorption capacity of carbon, Imagine that the price of a ton of carbon is about 12,000 yuan, and the adsorption of 300 grams of gold, the cost of gram gold is 40 yuan, and the adsorption of 3000 grams of gold, the cost of gram gold is 4 yuan, which is The cost of selling small-scale plants in the case of gold-loaded carbon is a far cry. Leaching reaction experimental device diagram Then, the data of the exploratory experiment will often be used as a necessary chapter by the geological survey report to prove the available value of the ore and estimate the future investment income, but it really needs to rise to the calculation of the construction investment and equipment selection. The data is not enough. Low- Carbon Steel Cut Wire Shot
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If we can understand the basic situation of the mine and can complete the mining rights transaction, can we build the factory right away? The answer is certainly no. For things buried deep underground, many factors are unknown. In order to understand the maximum benefit of the mine and avoid blind investment, the geological survey personnel should conduct a detailed survey and should select representative ore samples. Conduct an exploratory experiment.