SU839570A1 - Method of phosphorus containing ore flotation - Google Patents

Description

(54) METHOD OF FLOTATION OF PHOSPHORUS-CONTAINING ORES

one

The invention relates to the enrichment of minerals, in particular phosphate rock and apatite ores.

Extraction of apatite and phosphorite from ores containing magnesium and calcium carbonates presents great difficulties.

There is a known method of using amphotic surfactants as collectors in the flotation of quartz, hematite and a series of oxidized minerals l.

However, in this method, the insignificant length of the hydrocarbon radical does not provide for sufficient selectivity of the flotation process of phosphorus-containing minerals.

The closest to the proposed technical essence and the achieved result is the method of direct flotation of phosphorus-containing minerals. The method involves pretreatment of the ore in an alkaline medium with starch and conditioning with alcohol or droxamate jj.

The method provides production of apatite concentrate from silicate-carbonate ores of Seligdar deposit with a content of 33.4%, while extracting about 69.5% of the original ore.

The disadvantages of this method are:

1. The presence of an oxyhydryl collector in a mixture, with the estate of which direct flotation of phosphorus-containing minersshov is carried out, facilitates abundant pricing of the process. Flotation foam is stable, poorly destructible and poorly transportable, poorly mineralized.

2. The method does not provide an increase in technological extraction; R-O in concentrate.

3. The presence of a wide variety of formulations (four cochones) of reagents in the collecting mixture makes it difficult to regulate the flotation process and maintain it in optimal conditions.

The purpose of the invention is to improve the technological parameters of the flotation of phosphorus-containing ores and simultaneously improve the properties of flotation foam.

Claims (2)

The goal is achieved by additionally introducing N-ac laminoacidu or its alkaline salt in an amount to ensure that the ratio of alkylhydroxamate to N-acylaminoacid or its salt is from 1 to 4. N-acylaminocaproate or N- is used as N-acylaminoacid. sodium acylaminopropionate. The essence of the method. Is due to the hydrophobicization of the mineral surface of phosphorus-containing particles due to the fact that flotation is carried out with a mixture of anionic nitrogen-containing alkylhydroxamate reagents and acylated amino acids (N-acylaminoacids), the alkylhydroxamate type is highly efficient reapps in the “ments” of the “vis-a-amylamino acids” are in the “ments” of the “vis-a-amylamino acids” are in the “ments” of the “ments” of the “visually acceptable”, and the “grants” of the “visually acceptable” are in the “ments” of the “visually acceptable”, and are in the “ments” of the “visually acceptable”, and are in the “ments” of the “visually acceptable”, and are in the “ments” of the “ments” and are in the “ments” of the “visually acceptable”, and are in the “ments” of the “visually acceptable”, and are in the “’ the short hydrocarbon radical (Cn not more than Cj) determines the weak collective properties of these reagents. Strengthening of the collective activity of alkyl hydroxamate and I, an increase in the selectivity of the flotation process, is achieved by adding acylated amino acids of the composition C-C-1) - (CHa -) „- C-o (I) or (No) or H O Rcl; l- (CH), - C 0 (H) or (NciV Acylated amino acids possess amphoteric properties and dissociation of the carboxyl group is observed in the alkaline medium, resulting in conditions for their optimal use as a highly selective anion-active collector. For experiments on the flotation of phosphorus-containing ores, N was taken acylaminok slot hydrocarbon radical nepredel hydrochloric carboxylic acid in the acyl group {-C-) containing 17 carbon atoms, i.e., the length of the N-acyl amino acid molecule is increased by the length of the rad-cala, acyl group compared to the usual amino acid. It is longer; the hydrocarbon chain of the collector is, the less hydrated its molecules are, the more stable the adsorption layer of the collector is on the surface of the mineral and the greater the amount of water and the more hydrated layers around the mineral particles are separated from this surface, the more hydrophobicizing it the higher the flotation selectivity of phospholus-containing minerals. In addition, the length of the carboxylic acid radical of the amino acid itself also has a significant effect on the selectivity of flotation of phosphorus-containing minerals. In the proposed method, sodium N-acylaminopropionate and sodium N-acylaminocaproate are tested and it is shown that the selectivity of sodium N-acylaminocapronate under other equal conditions is higher than in the case of sodium N-acylaminopropionate. The method is carried out in the following manner. The ore is crushed, pulped, an alkaline agent and starch are introduced, then the pulp is conditioned with collectors; a mixture of alkyl hydroxamate with N-acylamino acid or its salt, taken in a ratio of from 1 to 4, and flotirate phosphorite. Example 1. Phosphorus-containing silicate-carbonate ore from the Seligdar deposit is subjected to flotation by a known method. The crushed ore is conditioned to a particle size of 1 mm in an alkaline medium (pH 9.0), created with a dosage of 2.0 kg / ton soda ash, liquid glass in the amount of 1.0 kg / ton and starch - 0.3 kg / ton. The flotation of phosphate-containing minerals is carried out by a collecting mixture comprising ethoxylated alkylphenols — alkyl hydroxamates — with tall oil — salt oil in a ratio of 75: 1.25: 0.25: 1.25. The flow rate of the collecting mixture does not exceed 0.3 kg / ton. Flotation is carried out according to the scheme, which includes the main, control and 2 cleanings with the re-flotation of middling products in the main operation. Example 2. The same ore is subjected to flotation as in Example 1. The conditioning in the alkaline medium of the pulp with liquid glass and starch was analogous to Example 1. However, the flotation of phosphorus-containing minerals was carried out using the proposed method involving the use of a collective mixture of alkyl hydroxamates and N-acylaminopropionate sodium ratio of 1: 3. Example 3. The flotation of apatite silicate-carbonate type ore from the Seligdar deposit was carried out analogously to example No. 2, but instead of N-acylaminopropionate sodium, N-acylaminocaproate sodium was used. Example 4. Flotation was subjected to the same ore as in Example No. 3 and under the same conditions, but as N-acylamine sodium sodium, a technical product based on it was used: tallactam, whose general formula is 99 RC-NH- (CH2) H - С-О (Н) ил «(Na), where R is from to C„ H,: Examples 5-9. The conditions of flotation of phosphate-containing ore of silicate-carbonate type of Seligdar deposit are similar to Example 4, but the ratios of the components of the collective mixture of alkyl hygroxamate and tallactam have changed. Ratio 0.5: 3.5 was tested (Example 5); 0.8: 3.2 (Example 6); 1: 1 (Example 7); 3: 1 (Example 8); 3.5: 0.5 (Example 9). As the tests show, the proposed method of enrichment of phosphorus-containing ores (by the example of difficult-to-enter high carbonate apatite ores from the Seligdar deposit) provides for an increase in the technological characteristics of flotation with a simultaneous improvement in the character and properties of flotation foam. The quality of concentrates increased by an average of 0.861, 4% (respectively, examples 7.4 and with a simultaneous increase in extraction in concentrate by 1.2-10.0%. The use of an optimal ratio of alkyl hydroxamate and M-acylaminr acid or its alkali metal salt provides well aminomeralized, easily destructible and traumatic foam foam, having aeroflocular character. Foam volume does not exceed 200-300 m and is optimal.The application of the proposed method improves the technological performance of phosphor-containing rudder and one | at the same time improves the properties of the flotation foam, involves low-quality, hard-to-absorbable phosphorus-containing raw materials in processing and makes it possible to obtain concentrates from it suitable for the production of mineral fertilizers. In addition, it expands the phosphate-raw material base of the country. alkyl hydroxamate ores, characterized in that, in order to increase the technological characteristics of flotation and the regulation of foaming, additionally introducing N-acylamino acid or its alkaline salt in an amount that provides the ratio of alkylhydroxamate and N-acylamino acid or its salt from 1 to 4. 2. Method POP.1, which differs from the fact that N is used as N-acylamino acid; acylaminopropionate sodium. 3. Method POP1, characterized in that N-acylaminocaproate sodium is used as the N-acylamino acid. Sources of information taken into account in the examination 1.R.W. Smith, R.Haddenham, C. Schroeder. Amphoteric Surfactants as a publication of the Society of Mining Engineers of AIME, V. 254, 3, 1973, p. 231235. 2. USSR author's certificate for application No. 2134796/03, c. В 03 О 1/00, 1975.