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Beneficiation method for separating chalcopyrite, galena, zinc blende and ironpyrite

A mineral processing method, sphalerite technology, applied in the direction of solid separation, flotation, etc., can solve the problems of unfavorable operation recovery, difficult activation, environmental pollution, etc., to avoid difficult activation of follow-up operations, high economic and technical indicators, avoid pipeline knots The effect of calcium

Active Publication Date: 2013-10-16
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0002] At present, in the flotation process of non-ferrous polymetallic ore, the beneficiation method for separating chalcopyrite from galena, sphalerite and pyrite mainly uses sodium sulfide, Galena is inhibited by dichromate, sphalerite is inhibited by zinc sulfate and sodium sulfite, and pyrite is inhibited by lime. The main problems are as follows: 1) heavy metal ions are not easy to degrade and cause serious environmental pollution; 2) use a large amount of lime Serious calcium accumulation in pipelines; 3) The single effect of various agents can only have a certain inhibitory effect on certain minerals; 4) After some minerals are severely inhibited, activation is difficult, which is not conducive to subsequent recovery operations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Separation flotation of copper, lead, zinc and sulfur was carried out on a copper-lead-zinc polymetallic sulfide ore. The ore grade of the ore was 0.68% copper, 1.76% lead, 3.21% zinc, and 13.25% sulfur. Add ferrous sulfate 1,500 g / ton to the raw ore and grind until the fineness is 70%-0.074 mm, then add sodium sulfite 600 g / ton and stir for 3 minutes under the condition of pulp concentration of 33%, then add 300 g / ton sodium metabisulfite to inflate After stirring for 5 minutes, add thioazepam and carry out copper roughing as a collector, and the flotation time is 5 minutes to obtain copper rough concentrate; adding ferrous sulfate consumption to copper rough concentrate is 600 grams / ton and grinds to After the fineness is 80%-0.044 mm, add sodium sulfite 300 g / ton and stir for 3 minutes under the condition of pulp concentration of 25%, then add 150 g / ton sodium metabisulfite and stir for 4 minutes, then conduct a copper beneficiation, flotation The time is 4 minutes...

Embodiment 2

[0019] Separation flotation of copper, lead, zinc and sulfur was carried out on a copper-lead-zinc polymetallic sulfide ore. The ore grade of the ore was 0.92% copper, 2.45% lead, 4.82% zinc, and 16.25% sulfur. Add ferrous sulfate 2000g / ton to the raw ore and grind until the fineness is 70%-0.074mm, then add sodium sulfite 800g / ton and stir for 3 minutes under the condition of pulp concentration of 33%, then add 400g / ton sodium metabisulfite to inflate After stirring for 6 minutes, add thiocarbamate as a collector for copper roughing, and the flotation time is 5 minutes to obtain copper rough concentrate; add ferrous sulfate to the copper rough concentrate with an amount of 1000 g / ton and grind to fine After the density is 85%-0.044 mm, add 400 g / ton of sodium sulfite and stir for 3 minutes under the condition of pulp concentration of 25%, then add 200 g / ton of sodium metabisulfite and stir for 4 minutes, then conduct a copper concentration, the flotation time It took 4 minu...

Embodiment 3

[0025] Separation flotation of a copper-lead-zinc mixed concentrate, the feed grade copper is 17.14%, lead is 6.18%, zinc is 17.45%, and sulfur is 19.16%. After grinding to a fineness of 81%-0.044 mm, add sodium sulfite 600 g / ton and stir for 3 minutes under the condition of pulp concentration of 25%, then add 400 g / ton sodium metabisulfite and stir for 4 minutes, then add butyl xanthogen Propionyl nitrile was used as a collector for a copper concentration, and the flotation time was 4 minutes to obtain copper concentrate I concentrate. After two times of concentration, the copper concentrate I concentrate produced copper concentrate. 28.44%, copper recovery rate 86.45%, lead 4.16%, zinc 8.71%

[0026] Comparative example 1

[0027] The ore in embodiment 3 adopts sodium sulfide, sodium sulfite and zinc sulfate as the depressant of galena and sphalerite, and lime carries out flotation as the depressant of pyrite to obtain copper concentrate, and the copper grade is 26.16...

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Abstract

The invention discloses a flotation separation method for chalcopyrite, galena, zinc blende and ironpyrite by a composite inhibitor which comprises sodium pyrosulfite, sodium sulfite and ferrous sulfate, has an inhibition effect on the galena, the zinc blende and the ironpyrite under the condition of a natural pH value, and is easy to degrade and activate after inhibition during a separation process of the chalcopyrite, the galena, the zinc blende and the ironpyrite. According to the flotation separation method, the flotation is performed under the condition of a neutral medium, the adopted composite inhibitor has the inhibition effect on three metal sulphide ores of the galena, the zinc blende and the ironpyrite; environment pollution caused by adoption of heavy metal salt inhibitors is prevented; pipeline scaling caused by adoption of lime is prevented; and the inhibiting capacity of the composite medicament is relatively weaker and added segmentally, an activation difficulty of follow-up operation due to overinhibition in a flotation process is prevented, and the improvement of the metal recovery rate is further facilitated.

Description

technical field [0001] The invention belongs to the technical field of mineral flotation separation technology, and in particular relates to a beneficiation method for separating chalcopyrite from galena, sphalerite and pyrite in the nonferrous polymetallic ore separation technology. technical background [0002] At present, in the flotation process of non-ferrous polymetallic ore, the beneficiation method for the separation of chalcopyrite, galena, sphalerite and pyrite mainly uses sodium sulfide, dichromate, etc. to inhibit galena, and uses zinc sulfate, sodium sulfite, etc. Inhibiting sphalerite, using lime to inhibit pyrite, mainly has the following problems: 1) heavy metal ions are not easy to degrade, which seriously pollutes the environment; 2) the use of a large amount of lime causes serious calcium buildup in pipelines; 3) the single effect of various agents can only It has a certain inhibitory effect on certain minerals; 4) After some minerals are severely inhibite...

Claims

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Application Information

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IPC IPC(8): B03D1/002B03D101/06B03D103/02
Inventor 胡保栓柏亚林孙运礼李福兰彭贵熊刘宝山何海涛郭海宁廖雪珍王李鹏
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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