SU1256793A1 - Method of flotation of coal and graphite - Google Patents

Description

The invention relates to mineral processing and can be used in the flotation of coal and graphite.

The purpose of the invention is to increase the selectivity and reduce the cost of the flotation process due to the hydrophobization of floated particles.

The remainder of the paraffin production is obtained by dewaxing the raffinate from the oil of distillates. Product composition, wt.%: Linear high molecular hydrocarbons 2-5 High molecular weight isostructural hydrocarbons 83-90 Resinous-asphaltene substances8-12 Physically, the product — the residue of paraffin production — is a viscous paraffinic mass from white to pale brown with a boilout of 350-500 C.

0.58 0.26 1.16 0.26 2.00 0.26

1.11

0.26 1.11 0.26

30.29 6.9

77.44 7.1

20.97

47.97

81.29 8.4951.21

 fr

82.79 7.1266.76

86.07 7.6473.24

0.805-0.835 11, 50-11.93

1.4480-1.4540 +42

The main components of kerosene are saturated hydrocarbons with the number of carbon atoms C - C.

Example 1. Flotation angles. To carry out the flotation process, we take a sample of coal, for example, 100 g, mix it with water in a laboratory machine of the type Mechanobr with a chamber volume of 0.5 liters for 3 minutes. Then the collector is served - a mixture of kerosene and the residue of paraffin production (SLOP-VOKS). After contacting the coal sample with the reagent, a blowing agent T-80 is fed for 5 nins, followed by contacting for 1 minute. Air is then introduced into the flotation cell and floated.

 y,

The results of the experiments are given in table. one.

Table 1

20.97

16.71

47.97

16,32

16.48

17.38

16.78

10: 1.11

0.26

15; 1, I, H

0.26

Analysis table. 1 shows that in the flotation of coal, the use of a mixture of kerosene and the residue of paraffin production in the ratio (5: l) - (lOi allows to increase the concentrate yield from 81.29 to 86.07 and 86.39%, and the ash content of waste from 51.21 up to 73.24 73.02%.

When using a mixture of kerosene and paraffin production residue in a 1: 1 ratio, flotation technical indicators deteriorate due to the fact that an increase in the proportion of paraffin production residue in kerosene does not provide sufficient solubility in kerosene, and this does not allow the reagent to be fixed on the entire surface of the useful component. At the same time, the ash content of the waste decreases from 73.24 and 73.02 to 66.76%, the yield of the concentrate decreases from 86.07 and 86.39 to 82.79%.

The use of a mixture of kerosene and the residue of paraffin production in the ratio of 15: 1 is impractical.

11.0859.40 32.68089.2

88,920,42810,8

100,004,060100,0

11,3859.75 32,5591.25

88,620,4018,75

100.00. 4.060100.00

Continuation of table 1

86.39 8.28 73.02 17.09

83.10 8.40 59.22 16.99

as flotation catchers deteriorate due to a significant increase in the proportion of kerosene. In this ash. waste falls from 73.24 and 73.02 to 59.22%, and the concentrate yield from 86.07 and 86.39 to 83.10%.

PRI mme R 2. Flotation of graphite ore. A portion of graphite ore (400 g) is mixed with water, ground in a laboratory ball mill for 15 minutes. The crushed ore is loaded into a laboratory machine of the Mechanobr type with a 1.8 liter chamber. Then the collector is served - a mixture of kerosene and the residue of paraffin production (SLOP-VOKS). After contacting the sample of graphite ore with a reagent, a blowing agent is supplied for 3 minutes, for example, T-80, followed by contacting for 1 minute. Air is then introduced into the flotation cell and floated.

The research results are summarized in table. 2

table 2

Kerosene - 0.320 T-80 - 0.250

Kerosene - 0.650 T-80 - 0.250

Analysis table. 2 shows that in the flotation of graphite, the use of a mixture of kerosene and paraffin production residue in the ratio (5: 1) - (10: 1) reduces the ash content of the concentrate from 59.75 to 46.7 and 47.1% with an increase in carbon recovery in concentrate from 91.25 to 91.48 and 91.54%.

When using a mixture of kerosene and paraffin production residue in a 1: 1 ratio, carbon extraction into concentrate decreases from 91.48 and 91.54 to 90.1%, since an increase in the proportion of paraffin production residue in kerosene does not provide sufficient solubility in kerosene, and this prevents the reagent from fixing on the entire surface of the useful component.

The use of a mixture of kerosene and the residue of paraffin production in the ratio of 15: 1 is impractical because the flotation process performance deteriorates due to a significant increase in the share of kerosene. This increases the ash content of the concentrate cp-46.7 and 47.1 to 52.1%, the extraction of carbon into the concentrate decreases from 91.48 and 91.54 to 91.21%.

An analysis of the above results shows that the use of a mixture of kerosene with the remainder of paraffin production can reduce the consumption of the collector, and this leads to an increase in the selectivity of the flotation process. Optimum consumption of reagents, kg / t, during coal flotation:

/.

Kerosene2.00

A mixture of kerosene with the residue of paraffin production in the ratio (5: 1) - (10: 1) G, 11 During graphite flotation:

Kerosene0,650

 A mixture of kerosene with the residue of paraffin production in the ratio (5: 1) - (10: 1) 0,400

In coal flotation, the use of a mixture of kerosene and the residue of paraffin production in the ratio (5: 1) - (0: 1) allows to increase the yield of the concentrate from 81.29 to 86.07 and 86.39%, and the ash content of the waste from 51.21 to 73.24 and 73.02%.

to

567938

At the same time, the consumption of the proposed reagent is reduced by 1.8 times compared with kerosene.

During flotation grafkt the use of 5 mixtures of kerosene and paraffin production residue in the ratio (5: 1) - (10: 1) reduces the ash content of the concentrate from 59.75 to 46, with increasing carbon recovery in concentrate from 91.25 to 91.48-91, 54X. At the same time, the consumption of the proposed reagent is reduced by 1.44 times while reducing the consumption of the specimen T-80 by 1.76 times.

The use of a mixture of kerosene with the rest of paraffin production in the ratio (5: 1) - (10: 1) instead of kerosene allows reducing the cost of coal flotation reagent by 1.9 times, with the use of graphite by 1.75 times.

t5.

20

Claims (1)

METHOD OF COAL AND GRAPHITE FLOTATION, including preconditioning of pulp with kerosene and blowing agent, characterized in that, in order to increase the selectivity and reduce the cost of the process by increasing the hydrophobization of floated particles during conditioning, the rest of the paraffin production obtained by dewaxing of raffinates from oil bottoms is additionally introduced its ratio with kerosene is from 1: 5 to 1: 10. 256793