SU622499A1 - Method of automatically controlling ferromagnetic suspension density - Google Patents

Description

one

The invention relates to the field of Mineral Processing, in particular, to the separation of ferromagnetic suspensions.

There is a method of controlling the density of a suspension in a separator based on radioactive, weight, piezometric methods of controlling the density by changing the flow rate of the additional emulsion or water. . .

A disadvantage of the known adjustment method is hardware complexity and, as a result, reliability and low accuracy are low.

There is also known a method for automatically adjusting the density of ferromagnetic suspensions by changing the costs of the iron or water 2.

The known method does not provide the necessary accuracy of regulation, since it does not allow to eliminate the effect of the speed of movement of the suspension on the measurement results.

The aim of the invention is to improve the accuracy of controlling the density of ferromagnetic suspensions in separators.

2

This goal is achieved by measuring the flow rate of a ferromagnetic suspension, and the flow rate of a thickener or water varies depending on the measured rate value.

The drawing shows a block scheme, an explanation of the method. It includes a suspension density sensor 1, a suspension flow velocity sensor 2, control unit 3, an actuator 4, a vibratory feeder .3.

The method is carried out as follows.

The density of the ferromagnetic suspension is measured by an inductive sensor 1 () through its magnetic susceptibility. To eliminate the measurement error caused by the dependence of the magnetic properties of ferromagnetic dispersed systems on the speed and nature of their flow, the flow velocity of the suspension is measured by sensor 2. Signals from sensors I and 2 receive the input unit of control unit Hai, where they determine the error signal accordingly the specified and measured density of the suspension and the correction correction

The flow velocity of the suspension is. The greater the rate of flow of the suspension in hap1Tyr, ateg). the smaller the signal is a density sensor with the same concentration of a ferromagnet in the pulp. At the same time the signal of the speed sensor increases. In sum, both signals of the density mismatch correction correspond to the actual deviation of the density of the ferromagnetic suspension from the specified value.

If the actual density of the suspension is below the maximum permissible value, then a negative signal appears at the output of the control unit, which is applied to the actuator 4, including the vibratory feeder 5, which supplies an additional heater. This occurs before the required density of the suspension is established in the apparatus.

If the actual density of the suspension in the apparatus turns out to be higher than acceptable, the sum of the signals will be positive, and the control unit will issue a command to supply additional water. Process in this

the case is the same until the required density of the suspension is established. I

The use of the invention allows to increase the stability of the density of ferromagnetic suspensions in the concentrating apparatus.

Claims (2)

1. Zubkov, G.A., et al. Automation of the process of enrichment of ores of non-ferrous metals, M., Nedra, 1967, p.205 2. USSR author's certificate number 46776S, cl. B 03 B 5/30, 1972.