SU1443968A1 - Method of controlling the process of flotation - Google Patents

Abstract

The invention relates to the automation of SU flotation process processes in coal and other industrial processing plants of the coal industry. The purpose of the invention is to improve the accuracy of controlling the sylvinic flotation process; ore. For this, the concentrate stream is divided into two parts of different floatability. One of the parts is returned to the preceding flotation process operation. The content of the useful component (PC) and the solid consumption in the initial power and the content of PC in the tailings are measured. The relationship between portions of the concentrate stream is changed inversely with the PC content and solid consumption in the original feed and PC content in the tailings. Thus, the constant content of the PC in the original power is maintained and the maintenance of the PC in the finished concentrate is maintained at a constant predetermined level - 92%. 2 Il. (L

Description

. (

4: i

CAD with O) 00

The invention relates to the management of the flotation process and can be used in the development and monitoring of automated control systems for flotation processes at the concentrators of the coal industry, the production of mineral fertilizers of the color and ferrous metallurgy,.

The purpose of the invention is to increase the accuracy of control over the flotation process of sylvite ore.

Fig. 1 is a flow chart; 2 is a block diagram of the device.

The method consists in the fact that, for example, in the technological scheme con-. The centrate of the first cleaning operation is divided in the groove of the foamed product over its length into two parts, different in floatability. For example, in the case shown in Fig. 1, the foam product of the fourth, third, and part of the second chambers is directed to the second main flotation chamber.

The foam product of the first chamber and part of the second chamber is directed to the second pre-cleaner operation. Thus, the less floatable concentrate particles of the first cleaner cell flotation arrive at the preceding operation — the main flotation, and the more floatable concentrate particles of the first cleaner cell flotation arrive at a subsequent operation — the second cleaner cell flotation. This leads to the separation of the concentrate of the first cleaner cell by floatability, which is equivalent to the introduction of a new flotation operation.

The concentrate of the first cleaner cell flotation is divided in the groove of the foamed product into two sampling zones - zone a (more floated particles) and zone 3 (less floated particles).

The separation characteristic by channel of the concentrate of the first cleaning operation - the zone concentrate .a has the form.

VASK)

1-exEi-KStal 1-exp (-С8Ц „)

(one)

where S is the degree of azration; K - floatable; t, n is the flotation time in the entire first roughing operation;

with

s

0 5

about d

five

0

five

tq is the flotation time in that part of the flotation machine, the foam product of which falls into the q zone. The separation characteristic of the new channel operation of the concentrate of the first roughing operation - the concentrate of zone S has the form:

P rKV S5EilKStslIilE5Ei-KSt5).,. 1-exp (-К5Ц „) where tg- flotation duration

in that part of the flotation machine, the foam product of which falls into the zone o.

Thus, by moving the separation boundary between zones 0.5, in accordance with relations (1) and (2), the separation characteristic of the new operation, its separation capacity, separation floatability, separation slope, respectively, change specifications. If it is possible to change the absolute value of the return flow (tolerance of the possibility of concentrate overflow from zone S to zone q through the movable gate between them), then the control becomes very efficient.

In case the load on the flotation scheme exceeds the nominal one, an additional amount of material falling at the beginning of the main flotation leads to a significant increase in the flotation machine and a decrease in technological indicators - an increase in the content of potassium chloride in the tails. Therefore, with a significant increase in the load on the circuit, it is necessary to reduce the magnitude of the return flow and shift accordingly the separation boundary. By reducing the load on the section below the nominal, the possibility arises of increasing the return flow, which, besides other positive results, makes it possible to maintain the load on the section close to the nominal. Therefore, while reducing the load on the section, it is necessary to shift the separation boundary in the direction of zone 5 extraction.

The device works as follows.

Signals about the quantity and quality of the raw materials are received from the sensor} of the load of the section on the feedstock and from the sensor 2 of the content of potassium chloride in the feedstock in the calculation of xSocmbi

Vtsak / .а

Phage i

BoSfnopt / u nepei / uc / m / fo to / u / skin

On the basis of Nuk dz subsidy FIG. 2

Vtsik change / 1b eni9

Claims (1)

Claim A method of controlling the flotation process, including measuring the content of the useful component in the feed and tailings, dividing the flotation products into parts and adjusting their proportions proportionally to the measured values, characterized in that, in order to improve the accuracy of control of the flotation process of high-strength ore, the concentrate stream is divided into two parts of different floatability, one of which is returned to the previous flotation operation of the process, the solid flow rate in the initial feed and is measured relations hold between the parts of the concentrate flow is inversely proportional to the useful component content in the original feed, the flow rate in the initial solid nutritional and mineral content in the tailings. eleven* 7 hours vtsaki azmei chenid 8th second fi fi option