SU839574A1 - Modifying agent for non-sulfide ore flotation - Google Patents

Description

The invention relates to the beneficiation of minerals and can be used in flotation concentrating factories of the Mintsvetmet, Minchermet and the USSR Ministry of Chemical Industry processing non-sulfide ores.

Modifier reagents are known, in which inorganic salts are used: water glass (sodium silicate), water glass in combination with aluminum salt, sodium silicofluoride, sodium tripolyphosphate and phosphates, chromates, dichromates [1].

Modifiers for depression of rock minerals are known, for which organic compounds are used: starch, decotrin, alcohol bard sulphite, CMC [2].

Also known modifier - collagen-tannide reagent £ 3].

However, all of these modifier reagents have disadvantages. So, liquid glass does not differ in the selectivity of action, while organic modifying reagents have a high cost (for example, CMC), are produced from food raw materials (in particular starch) or from tanning waste (collagen-tannide reagent) and have strong depressant properties, which leads to a decrease in the extraction of beneficial minerals. In addition, the reagents do not provide conditioning indicators in concentrate on the content of harmful impurities. The lack of effectiveness of the reactants is associated with the absence of specific complexing groups in their molecules capable of selectively interacting with metal cations included in the crystal lattices of the shared minerals.

In this regard, to create effective modifying reagents, the most promising direction is their special synthesis.

The compound is also known - phenylaminodimethylenediphosphonic acid, 20: -This reagent is a representative of organophosphorus complexones.

The compound is obtained from available products: phosphorus trichloride, formaldehyde, aniline and can be easily obtained under industrial conditions [4].

The purpose of the invention is to increase the technological parameters of the process of enrichment of non-sulfide ores and expanding the range of modifying reagents.

This goal is achieved by using as a modifier phenylaminodimethylenediphosphonic acid (AMP-3) having the formula

W \

CH ₂ PO ₃ Vl2

For flotation processing of apatiggo-carbonate ore, the most difficult task is the separation of apatite and calcite, which contain the same calcium ions in the crystal lattice. In connection with the fact that calcium located on the surface of apatite and calcite is distinguished by its complex-forming properties due to different anions and the influence of the crystal lattice, there arises the possibility of 20 use of complexon modifiers, namely phosphonate complexons, since depending on their structures (the number of phosphonic groups, the type of radical — aliphatic or aromatic, etc.) they form complexes of different strength with alkaline earth cations. So, for monophosphonic acids, the stability constant of complexones with calcium jq does not exceed 10 ^ and for polyphosphonic acids it increases to 10®-10 **.

The reagent AMP-3, used as a modifier during flotation of the monomineral calcite fraction, has a stronger depressing effect compared to liquid glass, which is widely used in enrichment practice.

Flotation is as follows. 40

Flotation experiments are carried out on the tailings of the magnetic separation of apatite-carbonate-forsterite ore. These tails, containing apatite, calcite and forsterite, are crushed to a particle size of 45% - 45

0.075 mm and obeschalivayutsya in the class of 20 microns, after which they enter the apatite flotation cycle.

The flotation scheme includes the main, control flotation and four re-purifications of the concentrate. Agitation with soda and a depressant (water glass, AMP-3) is carried out at 50% solid, and then the pulp enters the main flotation. As a reagent-regulator ,, medium ’, soda is used at a flow rate of 2000 g / t. (pH after the addition of soda

10.3-10.4). In the known mode, liquid glass (750 g / t) is used as a despressor of gangue minerals. In the proposed mode, AMF-3 reagent is used as a depressant at a flow rate of 100-150 g / t of flotation feed. In both cases, distilled tall oil soap (MDTM) is used as a collector at a flow rate of 280 g / t (250-30 g / t); therefore, in addition to the flow rate of the depressant, the costs of other reagents are the same.

The results of flotation of apatite from the tailings of apatite-carbonate ore show that when using the AMF-3 reagent as a depressant of rock minerals, an apatite concentrate was obtained upon recovery of P ^ O ^ by · 1.5% higher than in the known mode. In addition, this concentrate has a lower content of magnesium oxide (1.32 versus 1.83%), which is a harmful and difficult to separate impurity from apatite.

Thus, the use of phenylaminodimethylenedi-: phosphonic acid (AMP-3) as a modifier makes it possible to increase the selectivity of the apatite flotation process, to improve the quality of apatite concentrate, to reduce the content of impurities that are difficult to separate from apatite, and to increase the recovery of P _o Oy into apatite concentrate by 1 ,5%.

Claims (4)

The invention relates to the enrichment of minerals and can be used in the flotation dressing plants of Mintsvetmet, Mincher Meta and Minkhimprom of the USSR, processing non-sulfide ores. Modifying reagents are known, in which inorganic salts are used: liquid glass (sodium silicate), liquid glass in combination with aluminum salt, sodium fluorofluoride, tripolyphosphate and sodium phosphates, chromates, dichromate fl. Modifiers are known for the depression of rock minerals, in which organic dinene compounds are used: starch, decotrin, alcohol bard sulphite, KSCH 2. A modifier is also known - collagen-tannide reagent s1. However, all these modifier reagents fly over the disadvantages. Thus, liquid glass does not differ in the selectivity of action, while organic modifying reagents have a high cost (for example, CMC), are produced from food raw materials (in particular starch) or from leather wastes (collagen tannid reagent) and have strong depressant properties, which leads to a decrease in the extraction of useful minerals. In addition, the reagents do not provide standard indicators in the concentrate on the content of harmful impurities. The lack of effectiveness of the reagents is due to the absence in their molecules of specific complexing groups capable of selectively interacting with metal cations included in the crystal lattices of the section of the minershov. In this connection, to create effective modifying reagents, the most promising direction is their special synthesis. . It is also known to be a compound, phenylaminodimetnlenediphosphonic acid, this reagent is a representative of organophosphorus complexones. The compound is obtained from the available products: phosphorus trichloride, formaldehyde, aniline, and can be easily used under commercial conditions 41. The invention is an increase in the technological indicators of the process of enrichment of non-sulphide ores and the expansion of the range of modifying reagents. This goal is achieved by using phenylaminodimethylene diphosphonic acid (AMP-3) as a modifier. having the formula 5 CHiPO Hj Crn flotation enrichment of apati (the to-carbonate ore, the most difficult task is to separate apatite and calcite containing the same type calcium ions in the crystal lattice. Calcium, which is on the surface of apatite and calcite, differs by its complexing properties due to different anions and the influence of the crystal lattice, then there arises the possibility of using modifier-complexones, namely phosphonate complexones, since, depending on their structure (amounts phosphonate groups, peptides, radical type - aliphatic or aromatic, etc.) they form complexes of different strength with alkaline-earth cations. So, for monophosphonic acids, the stability constant of complexones with calcium does not exceed 10 A for polyphosphonic increases to 10. AMP-3 reagent, used as a modifier in the flotation of the monomineral fraction of calcite, it has a stronger depressive action as compared with liquid glass, widely used in enrichment practice. Flotation is carried out as follows. The flotation tests are carried out on the tails of the magnetic separation of apatite-carbon-forsterite ore. These tails, containing apatite, calcite and forster iT, are ground to a size of 45% 0, 075 mm and descrambled in a class of 20 µm, after which they enter the apatite flotation cycle. The flotation scheme includes the main, control flotation and four cleanup concentrate. Agitation with soda and a depressor (liquid glass, AMP-3) is carried out at 50% solids, and then the pulp enters the main flotation. Soda is used as a reagent-regulator of the medium at a flow rate of 2000 g / t, (pH after the addition of soda is 10.3-10.4). Liquid glass (750 g / t) is used as a despressor for waste minerals in the known mode. In the proposed mode, AMP-3 is used as a depressor at a flow rate of 100-150 g / ton of flotation feed. In addition, soap of distilled tall oil (MDTM) is used as a collector at a flow rate of 280 g / t (250-30 g / t), therefore, besides the depressant flow rate, the rest is the same: the reagents are the same. The results of the flotation of apatite from the tails of apatite-carbonate ore show that when used as a depressor of rock minerals AMP-3 reagent, luchuchen-apatite concentrate when extracted on. 1.5% higher than the well-known mode. In addition, there is a lower content of magnesium oxide in this concentrate (1.32 versus 1.83%), which is a harmful and difficult to remove impurity from apatite. Thus, the use of phenylaminodimethylenedi-: phosphonic acid (AMP-3) as a modifier makes it possible to increase the selectivity of the flotation process of apatite, to improve the quality of apatite concentrate, to reduce the content of impurities difficult to separate from apatite, and to increase the recovery of PdO- to apatite concentrate by 1.5% . Claims of the Invention The use of phenylaminodimethylene diphosphonic acid having the formula (CH), ROSH2 D-HgN. as a modifier for the flotation of non-sulphide ores. Sources of information taken into account in the examination 1. Mokrousov VA Enrichment of calcite-fluorite ores by flotation using aluminum salts. - Mining Journal, 1945, No. 9, p. 27-30. 2. Eigems MA Reagents-regulators in the flotation process. M., Nedra, 1977, p. 101-108. 3. USSR author's certificate number 309741, cl. B 03 D 1/02, 1971. 4.Irani R et al. Chemistry, No. 31, 1966, p. 1603.