SU882625A1 - Modifier for non-sulphide ore flotation - Google Patents

Description

(54) MODIFIER FOR FLOTECH NON-SULF1 ORES

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This invention relates to the beneficiation of minerals and can be used in flotation beneficiation plants processing non-sulphide ores.

Inorganic salts are known for non-sulphide ores; sodium fluoride, phosphates, aluminum sulphate and sodium silicate (water glass) tj.

It is also known to combine liquid glass with aluminum sulphate, which is most effective under industrial conditions f2 |.

The disadvantages of the effect of the known inorganic modifiers are the low selectivity of the action and in a number of cases the pronounced depressing effect on the beneficial minerals, which causes their loss during 4lotation.

The use of starch, dextrin, sulfite-alcohol stillage, carboxymethylcellulose (CMC), collagen-tannide reagent 3, combinations of tylose or starch with water-soluble urea-formaldehyde resins is known in the art. 41.

The action of organic modifiers is also not sufficiently selective; in addition, they are very expensive (KHSCH) or are made from food raw materials (starch).

The modifier action is

10 ambiguous. In addition to their influence on the surface of shot minerals, they can have a significant effect on the ionic composition of the pulp: to bind metal cations into insoluble precipitates or, conversely, to form soluble complexes with them and thereby prevent the activation of minerals by these cations.

Claims (3)

The purpose of the invention is to find a modifier that affects the surface properties of the minerals being floated and regulates the ionic composition of the pulp, thereby achieving a selective increase in the extraction of the useful mineral. This goal is achieved by using nitrilotri (methylene L-phonic) acid (IMSC) or its salts having the formula / CH2S05) (N - CHjiSO X where Y is hydrogen, metal. This reagent belongs to the group of complexones that contain sulfo groups and are ester-effective complexing agents ts }. A large sulfo group agent for alkaline earth metals, with which sulfo-containing compounds form sparingly soluble salts, is known. Therefore, this reagent is an effective regulator of the ionic composition of the pulp, in which lochnozemelnye cations and affects the surface of the floatable minerals. Nitrilotri (methylenesulfonic) acid and its salts are readily available products. It is obtained by the interaction of such cheap and large-tonnage products as ammonia, formaldehyde, and sodium or potassium bisyls. Synthesis of the reagent is carried out in the following manner. To 13 ml (0.18 mol) of 25% ammonium aka, 46 m (0.5 mol) of 30% formalin are added while moving. After I h, a solution of 101.7 ml (0.5 mol) of 38% sodium or potassium bisulfite (or 56.7 g of metabisulpholite potassium in 130 cl of water) is poured. Stir the reaction mass for 2 h, and then evaporated to 1 / 2-1 / 3 of the original volume. The salt of nitrilotri (methylensulfonic) acid precipitates as a crystalline white precipitate, which is filtered off. Output 80-85% of theoretical. Since the proposed reagent is an effective body-forming complex for alkaline-earth cations, it is most appropriate to apply it to the flotation of non-sulphide ores containing a significant amount of minerals, which include alkaline-earth cations — magnesium, calcium, barium, etc .: fluorite and gelite , barite, various carbonatite, etc. 254 Example. Flotation tests were carried out on the fluorite area. Fluorite ore, after grinding to a particle size of 73% Class minus 0.074 mm and the release of sulphides, enters the fluorite flotation cycle. The experiments were carried out on hard water (7 hardness). B collector is used as olein grade B. The results of experiments with the use of the proposed reagent are compared with the results of experiments in a known mode using liquid sted, aluminum sulphate and soda (optimal costs). The use of nitrilotri (methylenesulfonic) acid causes an increase in the extraction of fluorite in the concentrate with a simultaneous increase in quality. The optimal consumption of the modifier is the consumption of 300 g / t, a further increase in the consumption of the codifier practically does not increase the extraction. Comparison of the results of the experiments on the full range of fluorite ore flotahs shows that in the experiments with the use of the proposed modifier, the rich industrial products obtained are characterized by a higher fluorite content of 79.5% instead of 67%. That is, the use of nitrilotri (methylene sulfonic) acid allows to increase the extraction of fluorite by 2% and slightly improve the quality of fluorite concentrate. The use of the reagent can be easily implemented in industrial practice without changing the existing scheme. Thus, the main advantage of the invention is the improvement of the technological parameters of the flotation of non-sulfide ores. Claims of the invention. Use of nitrilotri (methylene sulfonic) acid or its salts of formula CH2.S03X N - SNPO3. CHiSO X where X is hydrogen, a metal, as a modifier for flotation, nonsulfide ores. 5 8826 Sources of information taken into account during the examination 1. MA Eygel. Reagents-regulators in the flotation process, M., Nedra, 1977, p. 87-99.-5 2. Mokrousov V.A. Enrichment of calcite-slurite ores by flotation using aluminum salts .- Mining Journal, 1945, N 9, p. 27-30. 256 3. USSR author's certificate K 309741, cl. 3 03 D 1/02, 1971. - USSR Copyright Certificate - 276845, cl. B 03 D 1/02, 1970, 5. R.A. Lakoste, American Society, 77, 55, 12, 1955 (prototype). , -