SU1313514A1 - Method of automatic control of flotation - Google Patents

Abstract

This invention relates to the beneficiation of minerals. The purpose of the invention is to improve the accuracy of control of the flotation process by taking into account the distribution of the size of the surface of the solid phase in the sludge and floatable classes. For this, the mineralogical composition of the solid phase is measured and the surface of the minerals of the solid phase in the sludge and floatable classes of the initial feed is determined by the ratio of the consumption of the solid phase to the average particle size of the solid particles. The supply of reagents is carried out in proportion to the values of the surface of the individual mineral phases per unit time. According to the size of the surface of the minerals in the sludge, the flow rate of the initial pi-, tani is changed. According to the size of the surface of the minerals of the solid phase in the slimes and flotation classes, the consumption of reagents is adjusted. 1 il. about s

Description

113

The invention relates to the enrichment of minerals, such as phosphate and other mining and chemical raw materials,

The chain of the invention is to improve the control accuracy by taking into account the distribution of the size of the surface of the solid phase in the sludge and floatable classes.

The essence of the method is in jTOM, that the mineralogical composition of the solid phase is measured, the size of the surface of the minerals of the solid phase is determined in slimes and floatable classes of the initial feed and the flow of the initial feed is varied according to the surface of the minerals in the slimes, and the consumption of reagents is corrected in slimes and flotation classes.

The drawing shows a block diagram of the method.

The method is carried out as follows.

On the flotation supply line, sensors 1 and 2 control the volume flow and density of the pulp, respectively, and sampler 3 takes a sample of the source power and sends it to the classifier 4, where the selected mineral is divided into two classes: - d, + d where d is the maximum diameter of sludge particles in flotation feed.

Particles with a diameter of less than di form sclams that impede the flotation process, and with a diameter of more than dy - floatable classes.

The weight content of sludge and floatable classes in the sample taken is determined using weight sensors 5. The average particle size of the solid

particles of sludge classes d.

and floated

1c5 is determined by sensors 6. Analyzer 7 (for example, X-ray fluorescence analyzer, XRD) is used to determine the mineralogical composition of each selected coarseness class of the sample taken.

The concentration of the i-ro mineral in the sludge and floatable classes C; m arrive at the computing device 8, which also receives signals from sensors 1,2,5 and 6.

The computing device performs the following calculations.

Calculates flotation feed rate for solid product.

35142

Sp.d-Rpig (rpg-1). (one)

Tv

Where

P is the volumetric flow rate of flotation feed, determined by sensor 1; RPIT pulp density, determined by density meter 2;

UTV DL weight ore. Calculates the flotation feed productivity by slimes (Asleep, w) and floatable classes (, cf.)

Behind-. (2)

qu, + q.

 pit nyiT

1f

nnT, tppit ti nvc c,

(3)

where q and q „J-, respectively, the weight of the slag- and floatable classes in the selected sample. Calculates the amount of surface per unit of time of i-ro mineral in

 slimes 2e

 1, W

G pit, U1 C; IU

(four)

i 1,2 ...., m

where С j jj - the content of the i-th mineral in

sludge;

dm is the average particle diameter of the sludge;

m is the number of analyzed minerals.

Calculates the amount of surface per unit of time of the i-ro mineral in the floatable classes

p G nvUj p5il

, f a;

1 1.2 ,, .., m

(five)

where Sf - the content of i-ro mineral

 in floated classes; dj - average particle diameter

floated classes. Calculates the size of the surface of the i-ro mineral in the flotation feed

S; S

+ 3;, f.

(6)

Calculates reagent consumption Qj fib- S ,. (7)

i 1,2, ..., p

de bj is the expenditure ratio of the j-ro reagent for the ith mineral; n is the number of reagents.

313

The calculated values of the costs of reagents as tasks (set points) are fed to the regulators 9, from where the signal goes to the actuating mechanisms 10 for supplying the reagents to the flotation process 11.

In addition, the computing device 8 compares the values of the surfaces of the individual mineral phases in the sludge with given optimal values and calculates the feed rate of flotation by the formula

Spig Asleep + (s, s, -, s) (8)

de g

Pete

i 1 1

given optimal optimal flotation feed rate, corresponding to optimal values of surfaces, separate mineral phases in the sludge s .; specified specific performance factors.

Calculated G

Pete

come in as a job in the management system 12 mill 13, ensured144

supplying the required flotation feed rate.

Claims (1)

Invention Formula The method of automatic control of the flotation process, including changing the consumption of reagents, is proportional to the total surface of the solid phase, defined in the initial flotation feed as the ratio of the solid phase to the average particle size of solid particles, characterized in that in order to increase the control accuracy due to taking into account the distribution of the size of the surface of the solid phase in minerals in the sludge and floatable classes, the mineralogical composition of the solid phase is measured, the size of the surface of the minerals the solid phase is determined in slimes and floatable classes of the initial feed and changes the flow rate of the initial flotation feed according to the size of the mineral surface in the slimes of the initial feed and corrects the consumption of reagents according to the size of the mineral surface in the slimes and floatable classes. 1L.J Compiled by V. Persits, Editor N. Gorvat Tehred A. Kravchuk Proofreader L. Patay Order 2156/8 Circulation 512 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, 4/5 Production and printing company, Uzhgorod, st. Project, 4