Liner material and structural shape are the main reference objects affecting the performance and energy consumption of the ball mill . Therefore, manufacturers have been working on the wear-resistant lining and reasonable structural shape to reduce the energy consumption of the mill. High-manganese steel backing are commonly used in ball mill liner, has developed in recent years become a rubber liner, square with rounded corners and a magnetic backing liner, the following study on energy-saving effect on these types of liners.

1. High manganese steel liner

Our metal ore dressing plant mill liners mainly high manganese steel liner, this austenitic high manganese steel with high toughness and good work hardening, work hardening, but at the same time can cause swelling of the lining The lining plate is bent and deformed, which is easy to cause the connecting bolt of the lining plate to be cut off, and thus has serious defects such as large steel consumption, high energy consumption and cost, and low grinding efficiency.

2, rubber liner

The rubber lining has elasticity and corrosion resistance, can be deformed when subjected to steel ball impact, the lining plate has small force, high life and light weight. For the steel lining plate of Φ2.7×3.6m ball mill, the weight of each set is 32t, while the rubber lining plate is only 5.5t, which reduces the load of the mill and saves the energy consumption of the mill. The rubber lining can make the mill achieve the obvious economic effect of “one improvement, two retention, three reduction”, that is, improve the service life of the lining, maintain the processing capacity of the mill and the fineness of the product, and reduce the power consumption (generally reduce the frequency by 10%~15). %), ball consumption and noise.

3, rounded square liner

In the non-circular grinding cavity composed of rounded square lining or angular spiral lining, the movement of the steel ball and the material causes the position of the steel ball to detach from the point trajectory (Davis circle) and the position of the landing point to change, resulting in steel The shape of the parabola changes as the ball descends. That is to change the critical speed of the steel ball at that specific point, thus changing the proportion of impact and grinding of the steel ball during the grinding process, and strengthening the crushing effect of the ore. The smaller the radius of the fillet, the more steel balls are in the waterfall, the smaller the steel ball staying at the center of the waterfall, the stronger the impact, the more the ore movement, and the better the grinding effect of the ore. Due to the continuous continuous changing position of each layer of steel balls, the steel ball and the material are uniformly mixed, which reduces the possibility of the unground particles passing through the mill, and also reduces the over-grinding phenomenon of the qualified particles, thereby reducing the grinding. Mine energy consumption.

Jinchuan Nonferrous Metals Company beneficiation plant in a ball mill Φ2.7 × 3.6m Sec angle of the helical liner converted into the grinding mill consumption decreased by 19.9 percent; in Nanshan iron ore dressing plant also Washan two Φ2.7 × 3.6m this installation section mill liners, grinding so that electrical energy consumption savings 22.66%; after DEXING, water, Pungsan, tin cloud old processing plant, sheep or the like with the end mill processing plant installation angle of the helical liner, have received a significant Save the effect of grinding energy consumption.

4, magnetic liner

The magnetic layer of the ore layer is embedded with ceramic permanent magnets in the rubber. The magnets are arranged in a south-arc alternating structure to form a horseshoe-shaped magnet group, which firmly fixes the lining on the casing and forms a mineral layer. A layer of ore that is made of shredded steel or magnetically sensitive is formed. The ore bed can effectively promote the crushing of the ore in the range of the mill load, and all the wear occurs between the grinding media. It has been proved by domestic experiments that this lining has a certain effect on reducing the energy consumption of grinding. For example, the use of magnetic lining on the Φ1.5×3m ball mill reduces the electromechanical consumption of the ball mill by 10%.

Agricultural Machinery Parts

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