SU1273167A1 - Method of graphite flotation - Google Patents

Abstract

The invention relates to the enrichment of minerals and makes it possible to improve the quality of the concentrate and reduce the consumption of the reagent. For this purpose, the VAT residue from the rectification of polyalkylbenzenes is introduced into the preconditioning of the feedstock with a collector and blowing agent as a collector. It is obtained during the production of isopropyl benzene by alkylation of benzene in the presence of anhydrous aluminum chloride. The product is formed after rectification of polyalkyl benzenes used to trap benzene from flue gases during the alkylation process. In the benzene ring of the bottom residue of the rectification of polyalkylbenzenes of carbon cC hydrogen chains have basically a normal structure, This provides (L more firmly fixing the reagent on the mineral surface. Table I.

Description

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

The aim of the invention is to improve the quality of the concentrate to the reduction of reagent consumption.

According to the proposed method, including pre-conditioning the feedstock with a collector and a blowing agent, bottoms of the rectification of polyalkylbenzenes are introduced into conditioning as a collector.

The bottom residue of the rectification of polyalkylbenzenes is charged during the production of isopropylbenzene by alkylation of benzene in the presence of anhydrous aluminum chloride.

The product is formed after isolation by rectification of the polyalkylbenzenes used to trap benzene from the exhaust gases during the alkylation process.

According to the technological regulations, the bottom residue of rectification of polyalkylbenzenes is a waste product and is partially used as an additive in the refinery feedstock. Comp of two products, wt.%: Ethylbenzene

Isopropylbenzene. Butyl. And Dibutylbenzenes

thirteen

2-4

14-19

Heavy substitution products' in the benzene ring with the general formula C ₆ H _m R _t R ₂ , 73-84 where s> = 2-5;

R. = CH ₃ ; C ₂ H ₅ ;

R is a hydrocarbon radical of normal structure (up to 80%) and isostructure by the formula ^C and ^H £ b ^{+ 1} ' ⁿ b ⁵ ' at R _{1 (} + R = 6 - w.

So, according to the prototype method, the bottom residue from the production of isopropylbenzene consists mainly of isotropic hydrocarbons. The branching of the hydrocarbon chains of the reagents reduces the strength of their fastening on the mineral surface and requires an increased consumption, which leads to a decrease in the selectivity of the flotation process. In the reagent, the substituents in the benzene ring have basically a normal structure, which provides a more solid fixation of the reagent on the mineral surface, and this reduces the reagent • consumption and increases the selectivity of the flotation process.

Example. A sample of graphite ore of 0.400 kg is mixed with water, ground in a laboratory ball mill for 15 minutes. The crushed ore is loaded into a Mekhanobr type laboratory machine with a 1.8 liter chamber. Then the collector is fed - the bottom residue of the distillation of polyalkylbenzenes. After contacting the graphite ore sample with the reagent for 3 min fed foamed Vatel ^{May 2,} for example T-80 followed by contacting for 1 minute. Then air is supplied to the flotation machine and flotation is performed.

Comparative indicators of flotation of graphite ore obtained by the proposed and known methods are shown in the table.

Thus, the use of the method allows to reduce the ash content of the concentrate from 54.7 to 46.9% and to reduce the collector consumption by 1.4 times.

The optimal consumption of reagents, kg / kg 10: VAT residue rectification of polyalkylbenzenes: 632; cu40 residue from the production of isopropylbenzene 920.

Claims (1)

The invention relates to mineral processing and can be used in the flotation of graphite. The aim of the invention is to improve the quality of the concentrate and reduce the consumption of reagent. According to the proposed method, which includes preconditioning of the feedstock with a collector and a blowing agent, the VAT residue of the distillation of polyalkylbenzenes is introduced into the air conditioning as a collector. The cubic residue of the rectification of polyalkylbenzenes is obtained during the production of isopropylbenzene by alkylation of benzene in the presence of anhydrous aluminum chloride. The product is formed after the distillation of the polyalkylbenzenes used to trap benzene from the flue gases during the alkylation process. According to the technological regulations, the VAT residue of the rectification of polyalkylbenzenes is a waste product and is partially used as an additive in the feedstock oil refinery. Sosta in the product, wt.%; Ethylbenzene1 -3 Iso propylbenzene 2-4 Butyl. And dibutylbenzene14-19 T are the substitution products in the benzene ring with the general formula Cg,., 73-84 where f is n 2-5; R ,, R is a hydrocarbon radical of normal structure (up to 80%) and isostructures of formula 1 with R, + R 6 - tons. Thus, according to the prototype method, the bottom residue from the production of propylbenzene consists of: a nom from an isodesign hydrocarbons. Branching hydrocarbon chains of reagents reduces the strength of fixing them on the mineral surface and requires increased consumption, which leads to a decrease in the selectivity of the flotation process. In the reagent, the substituents in the benzene ring have a generally normal structure, which ensures a stronger fixation of the reagent on the mineral surface, and this allows reducing the consumption of the reagent and increasing the selectivity of the flotation process. Example. A portion of graphite ore of 0.400 kg 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 - VAT residue of polyalkylbenzenes rectification. After contacting the sample of graphite ore with the 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. Comparative indicators of the fleet of graphite ore obtained by the proposed and known methods are given in the table. Thus, the use of the method reduces the ash content of the concentrate from 54.7% to 46.9% and reduces the consumption of the collector 1.4 times. Optimum consumption of reagents, kg / kg 10: VAT residue of polyalkylbenzenes distillation: 632; vat residue from the production of isopropylbenzene 920. Claims of Invention Flotation of graphite, including preconditioning of the feedstock with a collector and blowing agent, characterized in that, in order to improve the quality of the concentrate and reduce the consumption of the reagent, the vat residue of the rectification of polyalkylbenzenes is used as a collector.