CN1037285A

CN1037285A - Beneficiation method for separating copper-lead-zinc multi-metal complex ore

Info

Publication number: CN1037285A
Application number: CN 88102337
Authority: CN
Inventors: 赵纯禄; 李凤楼; 丁松元
Original assignee: Beijing General Research Institute of Mining and Metallurgy
Current assignee: Beijing General Research Institute of Mining and Metallurgy
Priority date: 1988-05-07
Filing date: 1988-05-07
Publication date: 1989-11-22
Also published as: CN1017686B

Abstract

The invention relates to a beneficiation method for separating copper-lead-zinc multi-metal complex ores. The invention is characterized in that a certain amount of sodium sulfide is added into ore pulp before the copper-lead-zinc bulk concentrate is subjected to preferential separation flotation, the pH value is adjusted, minerals in an alkaline medium interact with a medicament, and the mineral separation process of preferential separation flotation in an acidic medium has the advantages of high sorting index, good separation of copper from lead and zinc, energy consumption saving, no environmental pollution and the like, and is suitable for separation of refractory multi-metal sulfide ores, in particular to mineral separation of complex copper, lead and zinc ores which contain secondary copper ores and pyrite and have fine mineral disseminated granularity.

Description

A kind of beneficiation method of separating the multi-metal complex minerals of Cu, Pb and Zn ore deposit

The present invention relates to a kind of beneficiation method of multi-metal complex sulphide ore, particularly the method for diffeential floatation copper concentrate from the copper lead zinc mixing ore concentrate that metal sulfides such as the copper of flotation complexity, lead, zinc obtain.

The Cu-Pb-Zn complex sulphide ore, because several metal symbiosis densifications, disseminated grain size is fine mutually, sorting is difficulty very.Handling this class ore both at home and abroad generally is the fineness that ore is ground to requirement, gets copper lead zinc mixing ore concentrate through flotation operation.The beneficiation method of separating copper, lead, zinc mainly contains three kinds from copper lead zinc mixing ore concentrate, and the one, heating method promptly by the various medicaments of the desorb mineral surfaces of heating, causes the difference of mineral floatability and reaches the purpose of sorting; The 2nd, utilize the cyanide medicament to suppress the floatability of copper mineral, and floating selecting square lead ore, reach the purpose of sorting; The 3rd, the method for adding organic salt promptly adopts starch, roasting glue, dextrin etc., as inhibitor, suppresses galena Floatation of Copper mineral.But the above-mentioned method of enumerating, the common problem that exists is that various metalliferous mineral separating effects are not good, metal recovery rate is low, be mingled with copper zinc amount height in the lead concentrate, cause product quality inferior, the method energy consumption height that has, the method that has is poisonous, the contaminated environment of medicament, and therefore, people are pursuing a kind of simple and effective separation method always.

The objective of the invention is to overcome the deficiencies in the prior art and a kind of sorting index height is provided, the method for copper concentrate is isolated in diffeential floatation the copper lead zinc mixing ore concentrate of the sulphide ore gained of metals such as the cupric from the flotation complexity of good separating effect, lead, zinc.

This method at first with metal sulfides such as the cupric of complexity, lead, zinc routinely method for floating promptly millimeter account for 80% by the broken ore fineness-0.074 that is ground to, add a certain amount of xanthate, foaming agent, No. 2 oil then, adjust the agent lime and carry out the bulk flotation of copper, lead, zinc vulcanizing mine, obtain copper, lead, zinc bulk concentrate, isolate copper concentrate by the diffeential floatation from copper, lead, zinc bulk concentrate of following operation at last:

A. the bulk concentrate of metal sulfides such as cupric, lead, zinc being regrinded to-0.033 millimeter and accounted for 90%, add active carbon 300-600 gram/ton in grinding process, is good with 500 gram/tons, carries out reagent removal and dense dehydration;

B. add fresh water and size mixing, to pulp density be 40%;

C. adding vulcanized sodium 1500-5000 gram/ton, is good with 2000 gram/tons, stirs;

D. add sodium sulfite 3000-6000 gram/ton, ferrous sulfate 2000-5000 gram/ton, and stir, the former is good with 5000 gram/tons, the latter with 3000 gram/tons;

E. add zinc sulfate 500-900 gram/ton, be good with 800 gram/tons, and stir;

F. add sulfuric acid and regulate the PH to 5-6 of ore pulp, and stir;

G. add ethyl xanthogenate 40-60 gram/ton, Z-200 medicament 30-50 gram/ton, the former is with 50 gram/tons, and the latter is good with 40 gram/tons; Carry out diffeential floatation, copper is separated with plumbous zinc, getting froth pulp is the copper rough concentrate, and product is lead concentrate or lead and zinc bulk concentrate in the groove.

Once can obtain the finished product copper concentrate with the copper rough concentrate that flotates is selected at last.

Adopt the method for flotation concentrates of the present invention, the multi-metal sulfide in certain mine has been carried out small-scale test, obtained separation results preferably.This ore deposit contains part secondary copper sulfide and a large amount of iron sulfide, the mineral disseminated grain size is tiny, belong to refractory minerals, the raw ore of cupric 0.25%, plumbous 1.14%, zinc 1.91%, silver 35.5 gram/tons wherein, after adopting conventional method for floating to obtain copper lead zinc mixing ore concentrate, regrind to-0.033 millimeter and account for 90%, in grinding process, add active carbon 500 gram/tons, carry out reagent removal, dense dehydration, add the new water of part and size mixing to concentration 40%; Add vulcanized sodium 2000 gram/tons, stirred 5 minutes; Continue to add sodium sulfite 5000 gram/tons and ferrous sulfate 3000 gram/tons; Stirred 15 minutes, and continued again to add zinc sulfate 800 gram/tons, stirred 3 minutes, add 8000 gram/ton sulfuric acid again, make pulp PH value remain on 5-6, stirred 3 minutes, add ethyl xanthogenate 40 gram/tons at last, z-200 medicament 30 gram/tons, carry out diffeential floatation, show, obtained to contain copper grade and be 21.29% copper concentrate through small-sized closed circuit beneficiation test, in this concentrate leaded only 3.91%, contain zinc 5.18%, copper recovery is 75.32%; The lead and zinc bulk concentrate grade that obtains is leaded 19.30%, contain zinc 33.40%; Plumbous zinc recovery is respectively 89.57% and 92.68% index.In addition, also obtained effect preferably when adopting method for floating of the present invention to handle the northern China ore deposit, this ore deposit cupric 0.23%, plumbous 0.62%, zinc 2.42%, iron 3.09%, adding active carbon 500 gram/tons, vulcanized sodium 2000 gram/tons, sodium sulfite 5000 gram/tons, ferrous sulfate 3000 gram/tons, zinc sulfate 800 gram/tons, sulfuric acid 8000 gram/tons, under the condition of ethyl xanthogenate 30 gram/tons and Z-200 medicament 40 gram/tons, through small-scale test, obtained the copper concentrate of cupric 15%, copper recovery is 60% index, has reached the purpose that copper separates with plumbous zinc.

This method has sorting index height, copper and plumbous zinc separator well, energy efficient, advantages such as non-environmental-pollution.Be applicable to the separation of the multi-metal sulfide of difficult choosing, the ore dressing in the Cu-Pb-Zn complex ore deposit of particularly contain secondary copper mine, contain the pyrite height, the valuable mineral disseminated grain size is fine.

Claims

1, a kind of from cupric, lead, zinc multi-metal complex sulphide ore the method for FLOTATION SEPARATION copper concentrate, comprise first flotation copper, lead, zinc bulk concentrate, it is characterized in that isolating copper concentrate by the diffeential floatation from copper, lead, zinc bulk concentrate of following operation:

A. Polymetallic sulphide bulk concentrates such as copper, lead, zinc are regrinded to-0.033 millimeter and accounted for 90%, in grinding process, add reagent removal by active carbon, dense dehydration;

B. adding fresh water sizes mixing;

C. add vulcanized sodium, and stir;

D. add sodium sulfite and ferrous sulfate, and stir;

E. add zinc sulfate, and stir;

F. adding sulfuric acid regulates the pH value of ore pulp and stirs;

G. add ethyl xanthogenate, Z-200 medicament diffeential floatation copper rough concentrate;

H. selected blister copper concentrate once gets the finished product copper concentrate.

2, method for floating according to claim 1 is characterized in that:

A. the addition of active carbon is a 300-600 gram/ton in the grinding process, is good with 500 gram/tons;

B. adding fresh water slurrying is 40% to concentration;

C. the addition of vulcanized sodium is a 1500-3000 gram/ton, is good with 2000 gram/tons;

D. the sodium sulfite addition is that the addition of 3000-6000 gram/ton, ferrous sulfate is a 2000-5000 gram/ton, and the former is good with 5000 gram/tons, the latter with 3000 gram/tons;

E. the addition of zinc sulfate is a 500-900 gram/ton, is good with 800 gram/tons;

F. add sulfuric acid and regulate the pH value of ore pulp to 5-6;

G. the amount 40-60 gram/ton that adds ethyl xanthogenate, Z-200 medicament are 30-50 gram/ton, and the former is good with 50 gram/tons, the latter with 40 gram/tons.