Rod mill

The structure of the rod mill is basically the same as that of the ball mill . The main difference is that the rod mill does not use a grid plate for ore discharge, but uses an open type, overflow type or peripheral type of discharge device.
The medium used in the rod mill is a round steel rod that is 10 to 15% shorter than the length of the cylinder. In order to prevent the steel bar from tilting during the operation of the mill, the end cap liners at both ends of the cylinder are usually formed as straight end faces perpendicular to the axis of the mill, and the length to diameter ratio of the mill cylinder should be maintained at 1.5 to 2.0. Rod mills use non-smooth liners such as corrugated or stepped shapes. The diameter of the hollow journal of the discharge end is much larger than that of the overflow ball mill of the same specification, in order to speed up the passage of the slurry through the mill. When the rod mill is in operation, the steel rods in the cylinder are in line contact, and the material with a larger particle size is first pulverized. When the steel rod is driven up, the coarse particles are often clamped between the rod and the rod, and the fine particles are easily leaked from the gap of the rod with the slurry, so there is a kind of "screening classification" between the rod and the rod. To make the rod mill have a strong "selective grinding" characteristics.
The structural feature of the end cap and hollow journal of the ore-mining end of the open-type rod mill is that there is no hollow journal at the discharge end of the mill, but a large flared overflow port is opened in the center of the discharge end. In order to prevent the slurry splash and the steel rod from sliding out of the mill barrel, the discharge port is blocked by a fixed conical cover, and the slurry overflows through the annular space between the flared overflow and the cover.
The peripheral mine-type rod mill is divided into two types: the end of the cylinder (the end of the discharge) and the type of the middle of the cylinder. In addition to different mining methods, the other structures are basically the same as the overflow ball mill, in view of the advantages of high grinding efficiency, energy saving and product quality. It has been applied in some industrial production in China. It can be used as dry, wet grinding and wet grinding operation. The grinding concentration in wet grinding process can reach 87~92%, and the pellet operation is commonly used. The main parameters of the rod mill are shown in the table below.

Table Main technical parameters of wet rod mill

Types of	Models and Specifications		Effective volume m ³	Tube rotation number r/min	Maximum ball (stick) amount t	Drive motor
						model	Power kW	Voltage V
Wet rod mill	Î¦900Ã—1800 Î¦900Ã—2400 Î¦1500Ã—3000 Î¦1500Ã—3000 (middle discharge) Î¦2100Ã—3000 Î¦2100Ã—3000 (middle discharge)		0.9 1.2 5 4.4 9 9	35.4 35.4 26 26 20.9 20.9	2.5 3.55 8 13 25 25		twenty two 30 95 95 210 210	380 380 380 380 380 380
	Î¦2700Ã—3600 Î¦2700Ã—4000 Î¦3200Ã—4500 Î¦3600Ã—4500 Î¦3600Ã—5400		18.5 20.6 32.8 43 50	18 18 16 14.7 15.1	46 46 82 110 124	TDMK400-32 TDMK400-32 TDMK630-36 TDMK1250-40 TM1000-36/2600	400 400 630 1250 1000	6000 6000 6000 6000 6000
Dry rod mill	Î¦2100Ã—3000 (peripheral mine discharge)		9	20.9	25		210	380
Types of	Thin oil station			Dimensions (length Ã— width Ã— height)	The heaviest component weight t	Weight t	price	Manufacturing plant
	model	Water cooling with m ³ /h					yuan
Wet rod mill	XYZ-25 XYZ-25	1.2 1.2		5000Ã—3380Ã—2020 5670Ã—3380Ã—2020 7635Ã—3341Ã—2766 7497Ã—3341Ã—2766 8600Ã—4700Ã—4400 9100Ã—4700Ã—4420	2.04 2.55 6.92 7.36 13.77 17.5	5.37 5.88 18 17.29 42.18 57	20000 24000 96000 120000	heavy Ordinary mine Shen Ye
	GXYZ-40 GXYZ-40 GXYZ-40 XYZ-40 20.100	3.0		9735Ã—5757Ã—4675 12700Ã—7232Ã—5652 15200Ã—8800Ã—6800 15910Ã—8040Ã—6726	24.70 28.9 39.50 46.84 60.7	68.00 73.3 108 159.9 150	290000	heavy Rich Luo Mine Hengye Shen Ye
Dry rod mill	XYZ	1.2		8100Ã—4740Ã—4420	13.77	43.78

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