SU997819A1 - Sulphide ore flotation collector - Google Patents

Description

The invention relates to mineral processing and can be used in flotation, factories processing sulphide copper ores (copper pyrite, copper zinc, copper nickel, etc.)

The most common reagent-collector of sulfide ores is potassium butyl xanthate, C1 and.

. It is known to use in the pumphouse of collectors of sulfides of another type of sulfhydryl collectors of aeroflots.

. As a collector of sulfide ores, the use of M, M-disubstituted-N-benzoylthiourea (BETC) of the general formula

C, H - N-C

NH-C-C H

  I and

1 s

where R is an aliphatic-hydrocarbon radical h.

The disadvantages of using known collectors of xanthates are, in a number of cases, the insufficient recovery of metals and the high costs of the reagent, the long flotation time and the considerable costs of the associated modifying reagents. For some types of ores, N, N-disubstituted -N-benzoylthiourea also does not allow for significantly higher metal recovery compared to xanthate.

Known N-phenyl-Y-alkyl-N-acylthiourea formula

ten

..- N-C-NH-C-R

% five

f-t i I tt h I

R 5

aliphatic carbohydrates "1 where R

15 Prenatal radicals (4. The reagent is synthesized by the interaction of aliphatic acid chlorides with amgloni or potassium rhodanide and monoalkylaniline. All operations

20 produced in the same reaction vessel. The yield of the product is not less than 96% of the theoretical. It is a solid, soluble in alkali. If there is no industrial production of certain acid chlorides, tr. they are obtained by the interaction of alfatic cyblot and phosphorus trichloride. General reaction

thirty . The reagent looks the following way :.

R COOHM / 3PCe, ::; - | Rc.

tNH, SCN + MH CC 4 All products used for the synthesis are produced on an industrial scale, therefore the proposed reagent can be easily obtained under industrial conditions. The purpose of the invention is to increase the extraction of metals during the flotation of sulfide liHX ores. This goal is achieved by using the N-phenyl-M-alkyl-M-acylthiourea of the formula hh // i-c-in-c and 4 I 11 II RS O R-, aliphatic hydrocarbon radicals as a collector for the flotation of sulfide ores. () .. In contrast to the known reagent -N, N-disubstituted-n-benzoylthiourea, the proposed reagent contains a C-alif benzene radical L / J, where the index radical R is an alpha hydrocarbon radical. The presence of an aliphatic radical instead of an aromatic radical causes the difference in the physicochemical and flotation properties. The proposed type of reagents is approximately 100 times weaker in its acidic strength than the calcined reagent with a benzoyl radical. Compounds with an aliphatic radical have a lower melting point than aromatic ones, as a result of which they are more soluble. Thus, for N-phenyl-i-ethyl-N-acylthio mochevins, where acyl, m.p. 7880 ° C, d; i-phenyl-TH-ethyl-N-benzoyl urea, so pl. 133-134 1 Example. In an open cycle, the copper pyrite ore is crushed to 60% -0.074 mm, treated with the teleme for 1 minute, a frother methyl-isobutylcarbinol (MIBK) is added in an amount of 10 g / t and wire flotation for 20 minutes The amount of soda is 9-10. In a closed cycle, the copper pier ore is crushed to 55-60% - 0.074 m. I and IT copper flotation is carried out.

ГЧт-С-КН-С-К

, Nve V / Til

Claims (3)

R 5 concentrates are combined and three clean-ups are carried out, in the copper cycle with limestone, the collector of butyl xanthate was 28 g / t with lime reagents, 6000 g / t with lime, and MIBK 10 g / t. In the case of BETK, its consumption is 32 g / t, lime - 3200 g / t, MIBK 8 g / t. in the copper cycle with the proposed reagent, its consumption was 30 g / t, lime - 3200 g / t, PIBK - 5 g / t. To obtain the pyrite concentrate, the tailings II copper flotation were floated by the collector and the resulting concentrate was subjected to one cleaning. In the pyrite cycle with limestone “1I” and reagents, the consumption of butyl xanthate was 80 g / t, MIBK - 5 g / t ,. soda - 4000 g / t. In case of using BETC, its consumption was 82 g / t, MIBK - 4 g / t, soda 2200 g / t. With the proposed reagent fero consumption was 85 g / t, MIBK 2 g / t, soda - 2200 g / t. The results of the experiments showed that with the use of the proposed agent as compared with the known, a slightly higher extraction of copper and sulfur is achieved. Compared with the use of xanthate, the use of the proposed reagent allows to increase copper recovery by 0.9% with a slightly higher quality of BF.3ICOKOM concentrate. The resulting copper concentrate is conforming and corresponds to the KM 7 grade. The sulfur content of sulfur remains almost the same. Compared to xanthate, copper flotation time is halved. The lime consumption in the copper cycle and soda in the pyrite cycle are almost halved. The flotation time with the proposed reagent is also less (1.5 times) compared to BETC. Thus, the use of the proposed reagent as compared with the wear reagent provides a number of technical and economic advantages and expands the range of reagents used. Claims Applying H-phenyl-K-alkyl-M-acyl-TLHOMO4eBHHH of the formula K-c-NH-e-Ri 9,997 where. KL - aliphatic hydrocarbon radicals as a collector for the flotation of sulfide ores. Sources of information taken into account in the examination of the fbT-PGI TII. PvDRE. X7 / JfC О / ± Д. 2. Shcherbakov V.A. Comparative characteristics of resident modes 8196 in domestic and foreign processing factories. - Non-ferrous metals, 1980, 4, pp.91-98. 3. Copyright certificate cJCCP 643197, cl. B 03 D 1/02, 1976. 5 e. M. Ac cfyetWo. ; , - - “h. 1 carb, it4des.-Jernef Ciiem4sciie Socieied, 1895, 67, p.1040.