SU1273169A1 - Method of flotation of mineral resources - Google Patents

Abstract

The invention relates to the area 4 of the lottery enrichment of useful materials and allows to increase the recovery of the useful component. For this, the raw materials are preconditioned with a collector. A high boiling point by-product of isoprene production by two-stage dehydrogenation of isoamylene is used as a collector, composition, wt%: saturated hydrocarbons (HC) 4--12, unsaturated HC 20-30, aromatic HC 46-68, carbonyl i compounds of aliphatic structure 6-14 . Efficiency is side-by-side (the L o product as a coke reagent is provided by a good ratio in its group chemical composition of hydrocarbon chemical compounds. This leads to an increase in the adsorption energy of the product tc on the surface of minerals and increases their flotability. 00

Description

This invention relates to the enrichment of minerals by the flotation method and can be used in enrichment plants.

The aim of the invention is to increase the recovery of the useful component.

As a reagent for the flotation of minerals used high-boiling by-product composition, wt.%:

Limit Hydrocarbons 4-12 Unsaturated Hydrocarbons 20-30 Aromatic Hydrocarbons 46-68 Aliphatic Carbonyl Compounds 6-14 In chemical technology, a technical product is known — a high boiling point byproduct; )

The high boiling byproduct VPPDIA is mixed with other by-products released during the production of isoprene and divinyl by two-stage dehydrogenation of carbonaceous rocks 5 and removed from the process under the technical aid of the spent absorbent.

Ayalysis of narrow fractions of a high-boiling product formed during the dehydrogenation of isramilev (VPPDIA), separated on a preparative chromatograph, using IR, CP and chromatography, made it possible to establish the presence of a large number of chemical compounds having multiple carbon-carbon bonds in VPPDIA, as well as carbonyl compounds.

The presence of linear, unsaturated hydrocarbons is confirmed on the IR spectra by intense absorption, which is haetaky to the methane and methylene groups in the 2905 2935, 2880, 1460 and 1385 cm region.

The presence of aromatics is confirmed by absorption in regions 3057, 3030, 1600., 1520, 1500, 800, 775, 745, and 700 cm.

The presence of carbonyl compounds is confirmed by absorption in the wavelength range of 1730, 1720, 1685 cm.

Characteristics of the high boiling product of isoamylenide dehydrogenation (FPDCA):.

Initial boiling point, ° C 90-110

10% boils away, C 132-140 30% boils away, ° C 155-165 50% boils away, from 170-180 70% boils away, C 185-195

90% boils away, ° С 208-225 End of boil-off, С 230-243 Group chemical composition, wt.%) Limit hydrocarbons 4-12

Unsaturated Hydrocarbons 20-30 Aromatic Hydrocarbons 46-68

Aliphatic carbonyl compounds

buildings 6-14

Appearance - dark blue without mechanical impurities liquid. Density is 820-920 kg / m.

Example To carry out the process, we take a sample of coal, for example, 100 g, mix it with water in a laboratory flotation machine of the Mechanobr type with a chamber volume of 0.7 l for 2 minutes. Then, a portion of the collector reagent — a high boiling point byproduct of the dehydrogenation of isoamylenes and isoprene, (VPPDIA) —is served

it with coal slurry over

40 seconds, and then the reagent blowing agent is supplied, for example, T-80, and after 20 seconds air is fed into the flotation pulp, followed by removal of the flotation concentrate for 60 seconds. Feed

air into the pulp is stopped and the next portion of the collector reagent is supplied, followed by coal flotation after compaction of the collector reagent with coal for 60 seconds.

Total reagent consumption — the amount of its dosing into the pulp is determined by the coal enrichment and the effectiveness of the reagents.

The flotation of sulphide ore is carried out according to the generally accepted technological scheme with the supply of VGSHDIA to the ore grinding process.

The study of sulfide flotation

Claims (1)

silver ores using a high boiling point dehydrogenation product of isoamylenes as an apolar hydrocarbon reagent and fed to the grinding operation instead of tractor kerosene allowed to establish the advantage of the new reagent. Conditions of experiments. The grinding of ore 60% of the class content of 74 microns. Tractor kerosene or high-boosted isoamylenes dehydrogenation product was dosed into the grinding operation. Na S was fed to the flotation process at 25-10 kg / kg in 5 and 10 minutes. The amount of butyl xanthate is 80-10 kg / kg and the baking agent is T-80 in the amount of 8410 kg / kg. The results of the study allowed to establish that the replacement of tractor kerosene (prototype) with a high-boiling by-product of the dehydrogenation of isoamylenes leads to a decrease in copper losses with tails by 2.5 abs.%, Silver by 2.1% with a simultaneous increase in the flotation rate. Extraction of copper and silver in the first concentrate increased from 5555, 1 to 61.3-62.6%. At the same time, the specific consumption of a high boiling product of dehydrogenation of isoamylenes is reduced by 3 times as compared with tractor kerosene. The results of the flotation of coal fines entering the enrichment showed that the use of a high boiling dehydrogenation byproduct of isomelenes as a reagent-collector makes it possible to increase the extraction of the combustible mass into concentrate by 5.9-10.0% with simultaneous decrease in reagent consumption of 1 , 5–2.0 times in comparison with the use of tractor kerosene as a collector reagent. The same regularities were obtained during the flotation of coal fines. Effectiveness of the high boiling product by-product of dehydrogenation of iso-amylenes when used as a collector reagent is provided by the appropriate ratio in its group chemical composition of hydrocarbon chemical compounds. An increase in the group chemical composition of the high-boiling product of the dehydrogenation of isoamylenes of unsaturated hydrocarbons leads to an increase in the energy of the product adsorption on the coal surface as compared to tractor kerosene and, consequently, to an increase in the floatability of coal. The increase in the hydrophobization of the coal surface in the case of the use of a high-boiling by-product of the dehydrogenation of isoamylenes compared with tractor kerosene was confirmed by the floatability of coal fines in the mono-bubble apparatus; Hallimonda. With an equal concentration of reagents in water (26-50 mg / l), the yield of the product, in the case of using a high-boiling product, dehydrogenating isoamylenes, was 67-80% npOTiiB 58-70% when using tractor kerosene. The increased recovery of copper and silver in the concentrate when using a high boiling point byproduct is due to the presence of unsaturated and aromatic compounds in the product, which have the same adsorption power on the mineral surface as compared to the limit and naphthenic ones present in tractor kerosene. This leads to an increase in the adsorption of xanthate on minerals and, as a consequence, to an increase in the floatability of the useful components. In addition, a high boiling point byproduct of the dehydrogenation of isoamylenes contains a large amount of carbonyl compounds, which are characterized by high reactivity and surface activity, which allows adsorption on the mineral surface, not only due to the effect of electrostatic forces. (D 2, unit.; But also due to chemical forces, for example, due to the hydrogen bond of the group. This changes the surface properties of sulfide minerals and has a positive effect on the interaction of minerals with xanthate and sodium sulfide. So Thus, the use of the method makes it possible to increase the extraction of coal by 9-10% and copper and silver from 55.0-55.1 to 61.3-62.6%. In addition, the consumption of the reagent is significantly reduced. including pre-conditioing the feedstock with the collector, distinguishing so that, in order to improve the extraction of the useful component, in the shakes-saturated hydrocarbons 4-12 the collector introduced high boilers. Non-limiting hydrocarbons 20-30 by-product from the production of iso-aromatic hydrocarbons 46-68 prene two-stage dehydrogenation Carbonyl compounds isoamylene composition, wt.%: 5 aliphatic structure 6-14 1273169