SU977020A1 - Method of automatic control of wet disintegration process - Google Patents

Description

The invention relates to the automation of the grinding process in the beneficiation of mineral ores and can be used in the processing plants of non-ferrous and ferrous metallurgy.

There is a known method of controlling single-stage grinding cycles using an energy pargmeter 1J.

However, the disadvantages of this method include the lack of consideration of the different consumption of the grinding medium for grinding the starting material of variable particle size distribution and the transition from one fineness to another.

The closest to the proposed technical essence is a method of automatic control of the wet grinding process, including measuring the flow of ore and water in a mill, stabilizing the ore-water ratio at a given value, measuring and stabilizing the size of the mill discharge product at a given value, measuring and stabilizing the drain size classifier on the given value C23.

The disadvantage of this method is the lack of accounting for the oxyme slime (their

physical and mechanical properties), the choice / optimal ratio of T: W in the mill and control over the work of the classifier. And this ultimately reduces the performance of the grinding complex mill-classifier.

The purpose of the invention is to improve the quality of control.

This is achieved by the fact that in the method of automatic control of the wet grinding process, including the measurement of the flow rate of the rudders and water in the mill, the stabilization of the ratio, the ore-water at a given value,

Claims (2)

15 measuring and stabilizing the grain size of the mill discharge product at a given value, measuring and stabilizing the grain size of the classifier drain at a given value, additionally measuring the density of the slurry in the discharge of the classifier and adjusting the given grain size values of the mill discharge product and the ore-water ratio, and correcting 25 The setting of the specified values for the size of the mill discharge product and the ore-water ratio is carried out in. . directly proportional to the density of the pulp in the discharge of the classifier. The method of automatic control of the wet grinding process can be implemented with the help of a device whose scheme is shown in the drawing. The device contains the ore-water ratio system of a mill 1 operating in a closed cycle with a spiral classifier 2, including a weight meter 3, a secondary device 4 recording the ore consumption, the regulator 5 of the ore-water ratio controlling the actuator b that changes the flow rate water into the mill, water flow meter 7, the secondary device 8, recording the flow of water into the mill, the signal from which is fed to the controller 5; the system of stabilization of the product size in the unloading of the mill, including the sensor 9, the size of the product of the discharge of the mill, the secondary device 10, which records the change in the size of the product of the discharge of the mill, regul. L tor 11, control block 12, a thyristor converter 13, an engine 14, which changes the speed of the conveyor 1 which feeds the ore to the mill, the classifier particle size stabilization system, including the size sensor 16, the secondary device 17, .register of the classifier discharge, a regulator 18 controlling an actuator 19 that changes the flow of water into the classifier; a pulp density sensor 20 in the discharge of the classifier; a secondary device 21 that registers the density of the pulp in the discharge of the classifier, the signal from which is fed to the controllers 5 and 11. The control is carried out as follows. When changing the properties of the ore by size and hardness of the stabilization system support the specified mode. The density of the pulp in the discharge of the classifier in this case may change. So, for example, if ore went soft and less coarse, the system for stabilizing the particle size of the classifier's discharge 16–17–18–19 maintains the particle size at a given level, while the density has changed to a larger side, i.e. regrindment occurs. In this case, the signal from the secondary device 21 is fed to the controllers 5 and 11. In the control system of the ore-water ratio 3-4-5-6-7-8, an increase in the ore-water ratio occurs, the water goes to the mill more and. the ore will be transported more quickly in the mill, i.e. less time being crushed. In the system of stabilization of the product size of the discharge of the mill 9-10-1112-13-14, an increase in the size task will occur and the mill will begin to produce a larger material. As a result of these impacts, an increase in the productivity of the grinding unit for the finished product and the elimination of overmilling will occur, since when a larger product is dispensed, the mill will process more fresh food at the same grain size of the finished product. When the quality of the ore changes in the other direction, all management operations occur in the reverse order. It should be noted that with this control, the Mill will more efficiently grind the material without over-grinding and under-grinding. As a result, the material that is optimally prepared for this process and with the minimum allowable amount of sludge will flow to the flotation. The invention The method of automatic control of wet milling process, including measuring the flow rate of ore and water in the mill, stabilizing the ore-water ratio at a given value, measuring and stabilizing the size of the product unloading the mill at a given value, measuring and stabilizing the size of the classifier discharge at a given value, similar to In order to improve the quality of control, the density of the pulp in the discharge of the classifier is additionally measured and the set values of the product size are adjusted This is the discharge of the mill and the ore-water ratio, and the adjustment of the specified values for the size of the product of the mill discharge and the ore-water ratio was carried out directly in proportion to the slurry density in the discharge of the classifier. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 659183, class, B 02 C 25/00, 1972. 2. USSR author's certificate No. 243389, class, B 02 C 25/00, 1963 (prototype),