SU944648A1 - Method of controlling cone crusher charging - Google Patents

Description

(5) METHOD OF REGULATING THE LOADING OF CONE. CRUSHERS

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This invention relates to a technique for automating the process of crushing in cone crushers used in the mining and chemical processing industry.

There is a method of controlling the loading of a cone crusher, which involves creating a layer of material above the entrance to the crushing zone by changing the productivity of the crusher. fo

This method involves uniformly filling the receiving tank with ore, a crusher using a feed distributor, and controlling the height of the bed above the entrance to the crushing zone, 5 while the level of the bed to be stabilized is kept constant J.

The disadvantage of this method is that it can be used only for ores, the physicomechanical properties of which practically do not change. In practice, these properties of ores change with time in terms of

body limits (humidity, initial size, strength).

This leads to the impossibility of achieving optimum process parameters when using this method.

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

This is achieved by the method of controlling the loading of a cone crusher, which includes creating a layer of material above the entrance to the crusher and measuring the productivity of the crusher, additionally measuring the throughput of the crusher and changing the capacity of the material above the entrance to the crusher zone is proportional to the calculated value.

In the presence of a layer of ore in the receiving capacity of the crusher capacity

its maximum, but varies depending on the crushability of the ore (physical and mechanical properties.

Therefore, to ensure consistently reliable operation of the crusher mechanisms, it is necessary to change the degree of its filling. This ensures the operation of the crusher without peak loads on the nodes and mechanisms and within acceptable limits.

The implementation of the proposed method provides for the control of several predetermined filling levels of the crusher. Moreover, for a crushed material with different physicomechanical properties that determine its crushability (size, strength, humidity), to ensure stable operation of the crusher under the condition of the best technological parameters (the quality of the finished product corresponds to different filling levels.

Ore of moderate crushability enters the crusher (with average physicomechanical properties, strength 17 17. units on the scale. Horsehill method. To ensure reliable and stable operation of the crusher with this ore, it is necessary to create a filling level of the aggregate with a height of 0. crushers provide maximum productivity (throughput t / h ;, the crusher cannot process more ore. The task in this case is to stabilize the specified optimal filling level.

At some point, the ore changes its properties: passes

18

2CC 17

255 16 270

the ore is more easily crushable with a strength of 16 units. on scale Protod horse. This means that neither a crusher can miss a greater amount of ore per unit of time. This leads to the fact that in order to automatically maintain a given level, the controller gives a signal to increase the performance of the feeder.

The duration of the control signal of one sign characterizes the change in the properties of the ore. In this case, the adjustment of the controlled (stabilized) value of the filling level, i.e. the level of filling stabilization changes to 0.17D.

Thus, the system stabilizes the optimum level of lightning crusher for ore with the given physical and mechanical properties.

The definition of an unambiguous correspondence of the duration of the control signal of the regulator to a certain filling level is not feasible, since this time depends on each parameter determining the crushability of the material (strength, size, humidity) and on any combination of them.

Under the conditions of the Dzhezkazgan Mining and Metallurgical Combine, copper ores of various types and methods of mining, having different strength and humidity, are processed.

The table shows the comparative data of tests of the known and proposed methods for regulating the operation of a cone crusher depending on

ore fortress with its moisture content from 3.5 to k%.

323

0.11 O.U W 365 0.17

The economic effect of the proposed method as applied to the concentrating plant with a capacity of 10 million tons of ore per year, where 12 KMD-2200 crushers are installed, is composed of increasing the productivity of crushers by 5-7% in class 25 mm, reducing the weighted average size by C-6%, the time between repairs is 15-20, and it is 50-70 thousand rubles.

Claims (1)

1. USSR author's certificate No. 5 of application D 2793042/33, cl. V C 25/00, 1978.