SU1077641A1 - Reagent for flotation of coal - Google Patents

Description

This invention relates to the enrichment of minerals by flotation and can be used in coal preparation plants.

During coal flotation, technical products of petrochemistry are used as reagents, containing various chemical compounds in the group chemical composition.

Two types of reagents are known that are supplied to the flotation process: collector reagents containing mainly group hydrocarbons of different structure in the chemical composition, and foam reagents containing compounds with different fields or functional groups of Group III with the group composition. ,

The flotation activity of the reagent mixture is determined both by the ratio of the reactants — the collector and foaming agent — and the group chemical composition of the reactants.

It is known to use green oil as a reagent-explorer of a technical product, containing higher phenols, alkyl derivatives of 1,3-dioxane, methyldihydropyran, hydrocarbons and other chemical compounds in the group chemical composition. However, the use of green oil is not effective enough, despite good selectivity, - for not very high flotation activity ,.

Known as a reagent for the flotation of coal Karaganda reagent synthesized on the basis of acetylene and content. Mainly alcohols 3

Known use in the flotation of coal as a reagent-collector of simple benzyl ethers of acetylene carbinols 4,

However, the use of reagents containing unsaturated alcohols in the group chemical composition results in a flotation concentrate with high ash content. This is due to the fact that the unsaturated alcohols included in the Karaganda reagent can be adsorbed on the mineral surface, its hydrophobic due to the presence of a hydrocarbon radical sufficient (and more), and convert the waste rock minerals into a frothy product.

The closest to the proposed structure and the achieved result when using coal for flotation as a reagent is propylene phenol ester 3.

However, given the high quality and extraction of coal, this reagent is not selective enough. The ash content of the concentrate reaches 8.0-8.8.

A chemical compound of the class of cyclic ethers with ngshichie in the side hydrocarbon chain of the acetylene group — cyclohexanol propargyl ester, which is used as a steel corrosion inhibitor in mineral acids b

 invention - reducing the ash content of the concentrate.

The goal is achieved by the use of cyclohexanol formula

CH2

HjCi CH-O-CHy SNS NACCH SYo

CHj

as a flotation agent

ug,

 Physico-chemical constants:

boiling point 40 ° С (1 mm Hg

dj density is 0.9196; coefficient

ref13aktsii p 1,4597,

Example 1 To carry out the process, we take a sample of coal, for example, 100 g, mixed with water in a laboratory machine of the type Mekhanobr. chamber volume 0.75-lv.v 2 min. Then a portion of pearetite is fed. A mixture of kerosene with cyclohexairl propargyl ether in a ratio of 98s2. After contact of the coal with the reagent for 1 minute, the ionic pulp is air fed to the fleet and air is flooded for 1 min. the next portion of the reagent is fed followed by kongaktirov: with it with coal for 1 min. After contact of the coal sample with the reagent, air is again in the pulp and the second concentrate is removed. A mixture of tractor kerosene and propargyl ether cyclohexanol is supplied fractionally. 6a1 (the consumption of reagents and the amount of its doping and the pulp is determined by its flotation activity.

To determine the effectiveness of using cyclohexanol propargyl ester by itself (for comparison with Karaganda reagent) or a mixture with tractor M kerosene, conduct fine coal fflotation with a base reagent mixture, namely a mixture of tractor kerosene with green oil in a ratio of 98: 2.

The remaining operations of the coal flotation process remain unchanged.

Laboratory results show that the use of cyclohexanol propargyl ester instead of Karaganda reagent makes it possible to increase the extraction of the combustible mass in the concentrate by 1.2–3.4% while reducing the reagent consumption 1 / 5–2 times and improving the selectivity. With the same yield of flotation concentrate, ft, 86.8 and 86.3%, respectively, the ash content of the flotation concentrate in the case of using propargyl ether is 0.6% lower compared to the Karaganda reagent, and the consumption is 2 times lower (Table 1). In the case of using cyclohexanol propargyl ether as a reagent - foaming agent instead of green oil, positive results were also obtained. Identical qualitative and quantitative indicators of the flotation process were obtained by reducing the mixture of tractor kerosene with propargyl ether and cyclohexanol by a factor of 2. With an equal consumption of the mixture of reagents (1.05 kg), the extraction of combustible mass into concentrate in the case of using NIN of cyclohexnol propargyl ether by 6.4% compared with green oil (Table 1). Consequently, the use of cyclohexanol propargyl ester both as an independent reagent and as a blowing agent reagent in mixture with tractor kerosene allows to increase the extraction of the combustible mass into the concentrate, improve the selectivity of the coal flotation process and reduce the consumption of reagents. The results of the flotation of coal mines. With the use of various reagent modes are given in Table. 1. Example 2. The results of the investigation of coal flotation using propargyl ether foaming agent, cyclohexanol and phenol propargyl ether, which are known, showed that the proposed reagent does have advantages over the known. The main advantage of the new reagent, cyclohexanol propargyl ether, is its increased selectivity of action. With approximately the same extraction of the combustible mass in the concentrate, its ash content is reduced by 0.6-0.9% (Table 2), which is positive when using the concentrate to obtain coke and use the latter in this process. The results of coal flotation using various reagents in the foaming agents are given in table. 2. A 1.0% reduction in the ash content of coke entering the blast furnace production leads to an increase in the productivity of blast furnaces by 1.52.0% and a decrease in the consumption of coke by 5-7 kg / t of pig iron. Thus, the main advantage of the invention is to improve the technological performance of coal flotation. ; Table 1

Iplohexiol propargyl ester

Concentrate

Tails

Original

Concentrate

Tails

Concentrate

Tails

Original

0.83

Concentrate

98: 2 Tails

Continued table. one

10776418

„F Continuation of table. .one

98: 2

Propargyl

ether

cyclohexanrel

Propargy- 98: 2 Lovy ester of phenol

Concentrate

Waste

Original

Concentrate

Waste

Original

3

Concentrate

Waste

Original

Concentrate

Waste

Original

Concentrate

Waste

Original

Concentrate

Waste

Original

Concentrate

Waste

Original

Concentrate

Waste

Original

Claims (2)

The use of propargyl, cyclogenol ether ch ₂ n ₂ s dn-o-sn ₂ - with nsn n, sk> fn ₂ ch ₂ as a reagent for coal flotation. 1077641 > one 1077641 2