CS203716B1 - Agent for the treatment of coal,ores or minerals by the lotation - Google Patents

Description

The invention relates to an agent for the treatment of coal, ores and minerals by flotation comprising polyethylene glycols.

Flotation agents typically comprise a foaming agent and a scooping agent, which is achieved by flotation, e.g. in air and aeration, very efficiently separable particles with different specific gravities. The foaming agent itself may also be used as a flotation agent.

Foams are organic substances whose molecule has a weakly weakly dissociated functional group, such as e.g. hydroxyl groups, fatty alcohols and phenols, carboxyl groups, fatty and aromatic acids, alkylsulfates, alkylsulfonates, aliphatic and aromatic amines and the like.

Foams are organic substances whose molecule contains weakly dissociated functional scales with substance collecting properties. The collector as a surfactant is selectively adsorbed on the surface of the mineral grain, thereby hydrophobising the grain and separating it more easily in the air bubble during flotation.

Many of the used flotation agents based on fatty alcohols and acids, xanthates, alkyl and aryl dithiophosphates, alkyl sulfates, alkyl sulfonates, amines, and phenols are relatively expensive products, and most of the flotation waters are largely cleaned. They are toxic and difficult to biodegrade. In addition, many agents are difficult to dissolve in water or difficult to disperse.

The flotation treatment agent of coal, ores and minerals according to the invention is a mixture of polyethylene glycols obtained as a by-product from the production of ethylene glycols after distillation, with a higher boiling point than the main product.

The reagent contains 50 to 96% wt / wt. substances with a collecting effect, preferably a mineral or ¹ tar oil.

Compared to the prior art agents, the agent of the invention has many advantages. It is good r-o-desolate in water and does not dewater when flotation. Too much non-toxic, it does not pollute flotation water and also degrades well in water. It is poorly foaming, thereby improving the purification of the water in the floodwater tanks, where no tough and absorbing foam is formed. From an economic point of view, the use of the reagent is very advantageous as it is a byproduct of chemical production - virtually unused at low cost.

The quality and efficacy of the flotation agent prepared according to the invention are shown by examples.

EXAMPLE

The flotation reagent was prepared from the by-product of. distillation residues from the production of monoethylene glycol from ethylene oxide. The by-product had Spec. weight 20/4 ° C

I, 1242, boiling point higher than monoethylene glycol, 141 ° C / 1.33 kPa, contained 44.3 wt. % diethylene glycol, 54.5 wt. triethylene glycol and the remainder of the higher polyethylene glycol. 30 wt. parts by-products and 70 wt. parts of the gas oil in the mixture was used in flotation of coking coal.

Flotation of coking coal was carried out in a laboratory flotation machine of contents

II. Thickening sludge was 100 gl ^first The flotation agent was dosed at 2.0 kg t ^-1 , the flotation time was 1.9 min.

The reagent was highly effective. In flotation the yield of the flotation concentrate was 74.9% by weight, the ash content in the concentrate was 9.5% by weight. and in flotation tailings 66.6 wt.

Example 2

A byproduct from glycol production of spec. 20/4 ° C 1.1211, boiling point 147 ° C / 1.33 kPa and a composition of 48.7 wt. % diethylene glycol, 51.0 wt. triethylene glycol and the remainder of the higher polyethylene glycols. /:

For 20 wt. 80 parts by weight of by-products were added directly to the flotation machine. parts of spindle oil.

Flotation was performed in a flotation machine as in Example 1, with ¹ slurry concentration of 100 g ^-1 , reagent dosing 2 ', 0 kg t ^-1 and a flotation time of 1.9 min.

The coking coal flotation test showed a high efficiency of the reagent in which flotation concentrate yield of 82.3% by weight, with an ash content of -9.9% and an ash content in the flotation tailings of 73.41% was achieved.

Claims (2)

SUBJECT 1. A flotation treatment agent for coal, ores and minerals, characterized in that it consists of a mixture of polyethylene glycols obtained as a by-product from the production of ethylene glycols, after distillation, with a higher boiling point than the main product, INVENTION It 2. The reagent of claim 1 comprising 50 to 96 wt. substances with a collecting effect, preferably a mineral or tar oil.