SU939093A1 - Apparatus for controlling selective lead-zinc flotation - Google Patents

Description

(54) DEVICE MANAGEMENT OF SELECTIVE LEAD-ZINC FLOTATION

This invention relates to process control of the flotation beneficiation of non-ferrous metal ores.

A device is known for automatically controlling the process of selective lead-zinc flotation, which contains a ratio regulator of cyanide to blue vitriol in a zinc cycle and a summing block of cyanide consumption in both cycles, one of the inputs of which is connected to cyanide consumption sensors in a lead cycle, and the output - with one input of the regulator of the ratio of the consumption of reagents, the output of the latter is connected to the cyanide dosing unit in the zinc cycle, the output of which is connected to the second input of the summing unit, while the consumption meter is On the output of the vitriol, is connected to the second input of the ratio controller, and on the input, to the regulator of copper sulfate consumption in the zinc cycle, the input of which is connected with the output of the copper ion concentration sensor 1.

The known device allows the process of zinc flotation to maintain the conditions under which there is a close relationship between the consumption of copper sulphate and copper content in the liquid phase.

It is also known a control device for selective lead-zinc flotation,

5 contains a sensor of the composition of the initial feed and flotation products, the specific consumption of reagents and the consumption of solid flotation feed, a computing unit, delay blocks, regulators of reagent consumption of the activator, collector and regulator of the medium, two functional converters 2.

The known device allows controlling the reagent regime of zinc flotation depending on the conditions of lead

5, flotation, however, the device does not take into account the parameters of the ionic composition of the liquid phase of zinc flotation, without which there can be a sufficient degree of optimization of the process as a whole, the quality of lead-zinc flotation concentrators is improved.

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The purpose of the invention is to improve the quality of lead-zinc flotation concentrates by increasing control accuracy.

The goal is achieved by the fact that the device is equipped with sensors for the concentration of calcium ions, copper, xanthate in the liquid phase of the pulp, a third functional converter and three differentiation units, the two outputs of the first functional converter through the differentiation units of the regulator of the medium and activator, and the output of the second functional converter through the third differentiation unit is connected to the input of the collector reagent consumption controller, to the second The controller paths are connected, respectively, to the outputs of calcium ion concentration sensors, copper and xanthogenate, while the calcium ion concentration sensor output is connected via a third functional converter to the third inputs of the medium regulator and activator reagent consumption regulators, and to the third input of the regulator reagent consumption regulator The medium is connected to the second output of the sensor of the material composition of the poor feed and flotation products.

The drawing shows a block diagram of the device.

The device contains sensors 1 and 2 of the specific flow rate of the depressor, sensors 3 and 4 of the collector flow into the previous re-flotation, sensor 5 of the composition of the feed and flotation products, computing blocks 6 and 7, blocks 8 and 9 of the signal delay, sensors 10 of the solid flow in the zinc flotation, functional converters 11 and 12, blocks 13-15 differentiated, reagent consumption regulators 16-18, calcium concentration sensor 19 in the liquid phase, copper concentration sensor 20 in the liquid phase, xanthate concentration sensor 21 in the liquid phase, function ny converter 22.

The operation of the device is as follows.

The signals from sensor 1, 2 and 5 are fed to computing unit 6, where the signals from sensors 1 and 2 are summed and divided by the signal from sensor 5, and the resulting signal is fed to the input of block 8 of signal delays. The output signal of block 8 with a delay of time equal to the flotation time in the previous cycle, together with the signal from the solid flow sensor 10 in the power supply, the subsequent flotation transfer enters the input of the functional converter 11, where it is divided into two channels.

The signals from sensors 3 and 4 are fed to the input of the computing unit 7, the output signal of which is proportional to the sum signal of sensors 3 and 4 through the block 9 of the signal delay arrives at the input of the functional converter 12. In the functional converters And 12, the input signals are converted according to by specific equations, multiplied with the signals from sensor 10 and fed to the input of differentiation units 13-15, the output signals of which as corrective are fed to the input of regulators 16-18.

The output of the sensor 20 for the concentration of copper in the liquid phase of the pulp is supplied to the second input of the controller 17, and the output of the sensor 21 for the concentration of xanthate in the liquid phase of the pulp is fed to the second input of the controller 18. As the input to the controllers 17 and 18, the output of the calcium concentration meter in the pulp liquid phase is fed through the functional converter 22. The driver for the lime flow controller 16 is the output signal from the sensor of the material composition of the feed and flotation products. The feedback signal to the input of the controller 16 is supplied from the output of the calcium sensor 19 in the liquid phase of the pulp.

The system allows to increase the level of optimization of zinc flotation, to improve the quality of lead-zinc flotation concentrates.

Claims (2)

1. USSR author's certificate number 637157, cl. B 03 D 1/02, 1974. 2. USSR author's certificate No. 604584, cl. B 03 D 1/02, 1974 (prototype).