SU1583174A1 - Method of dressing carbonate-phosphorite ores - Google Patents

Abstract

The invention relates to the enrichment of minerals by flotation and can be used in the enrichment of phosphate, dolomite-carbonate-phosphate and other ores. The goal is to increase the extraction of phosphorus pentoxide, the quality of the concentrate and simplify the technological scheme. Raw materials are ground. The pulp is conditioned in an acidic environment with liquid glass (JS) and a collector. A mixture of alkyl sulfate, tall oil, fatty acids and kerosene is used as a collector. Then carbonate minerals are floated. Before being introduced into the conditioning, the LS is mixed with sodium humate (GN). Aluminum salts and potassium tartrate (TC) are also added to the conditioning. GN is obtained from waste coal. It is a depressor of phosphorus-containing minerals. The presence of ZhS enhances the depressive effect of GN, which most actively depresses phosphorus minerals and silicates. The presence of aluminum salts and TC also increases the depressant effect of GN. The reagent TK is the HOOCOOH (OH) -CI (OH) COOH (tartaric acid) dibasic acid salt. The positive effect of TK is associated with the formation of a complex with aluminum. The method provides an increase in the extraction of phosphorus pentoxide by 1.6% -12.0% and a concentrate quality by 2.5% -5.8% and simplifies the technological scheme due to the exclusion of desliming. 1 hp f-ly.

Description

The invention relates to the enrichment of minerals by flotation and can be used for the enrichment, the formation of phosphate, dolomite-carbonate-phosphate and other ores.

The aim of the invention is to increase the extraction of phosphorus pentoxide, the quality of the concentrate and simplify the technological scheme.

The feedstock is crushed, conditioned in an acidic medium with liquid glass and a collector - a mixture of alkyl sulfate, tall oil, fatty acids and kerosene. Then carbonate minerals are floated. Liquid glass is additionally mixed with sodium humus before being introduced into air conditioning. In this case, the con

Aluminum salts and potassium tartrate are also certified,

Sodium humate refers to humic compounds that are more often extracted from the soil by various alkaline solutions. All gubinous compounds are found in the form of condensed aromatic carbon nuclei and associated side radicals. Humic compounds (sodium humate) are active as monomeric substances whose stability depends on the alkalinity of the medium. They form various complexes with the participation of bridges from interchangeable cations Ca, Mg, Al, Fe. Humic compounds, in particular sodium humate, as flotation agents, are obtained from coal waste, have been known for a long time. Sodium humate is actively adsorbed on the surface of minerals in an alkaline medium, forming complexes with different content of iron or aluminum in them (the latter must be present in the form of basic Ions (Fe (OH) z +, Fe (, LION) 2} Al (OH) j. Therefore sodium humate depresses phosphorite and silicate minerals especially actively in the presence of liquid glass, which gives an alkaline phase, aluminum salts (no matter what: in an alkaline medium, they hydrolyze to form Al (OH) 1, AI, OH), and tartrate potassium - potassium tartrate) The last one is salt The basic organic acid HOOCCIKOH) CH (OH) COOH, which is used in the food industry, in dyeing fabrics, in organic synthesis and analytical chemistry. The technology is used, along with potassium oxalate, for processing tantaloniobium ores. In the case of phosphorite ores, tartrate of the channel enhances the depressing properties of humates, forming complexes with .aluminum.

The method is carried out as follows. °

The ore is crushed to a grain size of 0.15 mm and enriched according to a scheme involving basic carbonate flotation in an acidic medium (pH 4.5-5) with phosphate depression, additional grinding of the frothy product with two perelochkami and obtaining phosphate concentrate. Carbonate flotation is carried out with a phosphoric acid feed of 5 kg / ton. B quality

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phosphate depressant using a mixture of sodium humate 0.0002-0,0003 kg / kg and liquid glass 0.0001 kg / kg. Flotation was carried out in the presence of sulfuric acid 0.006 kg / kg, and in the mixture of aluminum sulfate 0.3 kg / ton and potassium tartrate 0.0006 kg / kg. Alkyl sulphates, tall oil, a mixture of fatty acids and kerosene 0.0005 kg / kg are used as a collector reagent. Carbonates are released into the frothy product; a mixture of phosphates and silicates is released into the frothy product. The ion and chamber products are pre-refined to -0.071 mm, the latter is subjected to two cleaning flocks, and the first to two controls.

Example 1, Ore containing,%: V70f 1,4; CO-2 21-22; MgO 4-5; 4-5, crushed to a grain size of -0.15 mm and subjected to carbonate flotation. The resulting foam and chamber products are crushed to a particle size of -0.071 mm. The foam product is subjected to two purebreeding flotation with the final tailings, and the chamber product is subjected to two control flotation with obtaining the phosphate concentrate. Flotation is carried out with the supply of phosphoric acid. A mixture of sodium humate and liquid glass is used as a depressor. Sulfuric acid, a mixture of aluminum sulfate and potassium tartrate is also supplied to the flotation. As a collector reagent, a mixture of tall oil of fatty acids, kerosene and alkyl sulfate is used.

The obtained phosphate concentrate with a content of 33.1% with the extraction of 83,427.

II p and mep 2, Carried out as in example 1. Flotation was carried out with the supply of sodium humate. 0 The medium was created with phosphoric and sulfuric acids ;. The obtained phosphate concentrate with a content of 30.6% with the extraction of 82.84%.

II p and me R 3. was carried out according to Example 1. Flotation was carried out with the supply of sodium humate, without the supply of aluminum sulphate salts and potassium tartrate. The obtained phosphate concentrate with a content of 29.8% a05 with the extraction of 71.4%.

EXAMPLE 4. Carried out as in Example 1. Flotation was carried out with feeding of sodium humate. Phosphate concentrate was obtained with a content of 31.5% Pr05 with recovery of 76.02% 0

515

During the flotation of the same ore, according to a known method, a phosphate concentrate was obtained with a content of 27.3% with recovery of 71.4X0.

The optimum consumption of sodium humate LO, 0002-0,0003 kg / kg and aluminum sulphate salts 0.0003 kg / kg and potassium tartrate 0.0006 kg / kg is selected experimentally by carbonate flotation. With less consumption of sodium humate, its extraction and content in phosphate concentrate decreases with the greater consumption of sodium humate, the whole flotation process is disturbed: peptization of the pulp is observed and flotation deteriorates.

When aluminum sulphate and potassium tartrate salts are used together with sodium humate, the extraction of P O and its content in the main concentrate is increased.

Thus, the use of the invention allows to simplify the technological scheme of enrichment of carbonate-phosphate ores by eliminating

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of the process of extraction, increase the extraction of phosphorus pentoxide by 1.6-12.0% and the quality of the concentrate by 2.55Q1, OA.

Claims (2)

1. A method for enriching carbonate-phosphate ores, including changing the feedstock, conditioning the pulp in an acidic environment with liquid glass, a collector — a mixture of alkyl sulfate, tall oil, kerosene fatty acids, and flotation of carbonate minerals, characterized in extraction of phosphorus pentoxide, concentrate quality and simplification of the technological scheme, liquid glass is mixed with sodium humate before being introduced into the air conditioning. 2. A method according to claim 1, characterized in that aluminum salts and potassium tartrate are additionally introduced into the conditioning.