CN101190427A - Complex plumbum, zinc, silver vulcanizing ore containing newboldite and pyrrhotite floatation method - Google Patents
Complex plumbum, zinc, silver vulcanizing ore containing newboldite and pyrrhotite floatation method Download PDFInfo
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Abstract
The invention discloses a lead and zinc flotation method to ferreous blende and pyrrhotite typed complex lead zinc silver sulphide ore, mainly comprising lead ore branch flotation which controls the electrochemical conditions of the flotation and the zinc and sulfur flotation separation which controls the electrochemical conditions of the flotation. The invention has the advantages of implementing the lead-zinc sulfur separation by adopting twice branch flotation, carrying out fast flotation to the lead ore by using a novel composite catching agent to the galena and silver ore with easy floating coarse grains under the conditions of higher ore pulp potential and low pH; the normal flotation of the lead ore with difficultly floated fine grains is carried out under the conditions of lower ore pulp potential and high pH. The pH of the ore pulp is adjusted to more than 12 by lime for the gangue after the lead is floated; the iron blende is activated by bluestone; the iron blende is recovered by the catching agent with the same type of the lead sulfide floatation, thus leading the property of the lead flotation waste water to be basically consistent with that of the zinc flotation waste water and being beneficial for the circular application of floatation waste water.
Description
Technical field
The present invention relates to the mineral floating field, relate in particular to a kind of containing the method that marmatite, magnetic iron ore type complex lead-zinc silver sulphide ore carries out plumbous zinc flotation.
Background technology
The most plumbous zinc ore of China is a multi-metal sulfide, generally is divided into two types, and a kind of is to be the ore of main purpose mineral with galena, zincblende and pyrite, as all mouthful of plumbous zinc ore in Guangdong, the plumbous zinc ore of Qinghai Xi Tieshan; Another kind is to be the ore of main purpose mineral with galena, marmatite and magnetic iron ore, its plumbous oxygenation efficiency is higher, the galena that ore is contained, owing to reasons such as disseminated grain size, oxidations, have different flotation natures, part flotation easily, argent content is very high in the galena that coarse grain easily floats, cloudlike South-South the plumbous zinc ore in affiliated mining area, be called and contain marmatite, magnetic iron ore type complex lead-zinc silver sulphide ore.
At present, the lead-zinc sulfide ore floatation process mainly contains two kinds:
(1) plumbous zinc iso flotability flotation technology
Behind the raw ore ore grinding, chats is regrinded, and under the condition of not regulating pH values of pulp, the zincblende that galena is similar with a part of floatability gets lead and zinc bulk concentrate with the xanthate flotation, and FLOTATION SEPARATION gets lead concentrate and zinc concentrate then; With copper sulphate for activation, get zinc sulfide mixed concentrate with xanthate bulk flotation Deng the mine tailing after can floating, then, FLOTATION SEPARATION gets zinc concentrate and sulphur concentrate.The advantage of this technology is to take into account to have considered recovery plumbous, zinc, and is effective for the plumbous zinc ore that with galena, zincblende and pyrite is the main purpose mineral.
But there is fatal shortcoming in this kind method for the plumbous zinc ore that with galena, marmatite and magnetic iron ore is the main purpose mineral: the efficiency of separation between (1) lead-zinc-sulphur is low, the mutual content height of plumbous zinc in the concentrate; (2) adopt cyanide, contaminated environment.
(2) high basicity diffeential floatation technology
Lead-zinc sulfide ore stone is carried out ore grinding earlier, adds the lime of q.s, ore pulp is adjusted to highly basic degree environment (pH is generally greater than 12), to new explanation from pyrite carry out brute force and suppress, and with xanthate diffeential floatation recovery lead; Flotation tailing activates with copper sulphate, reclaims zinc sulphide with butyl xanthate.This method is effective for the plumbous zinc ore that with galena, zincblende and pyrite is the main purpose mineral, and its advantage is that lead concentrate, zinc concentrate are of high grade, and the zincblende rate of recovery is better.
But have fatal shortcoming for the plumbous zinc ore that with galena, marmatite and magnetic iron ore is the main purpose mineral, (1) highly basic degree environment (pH is greater than 12) is plumbous and silver raising recovery rate is low; (2) the marmatite rate of recovery is low.
Summary of the invention
In order to overcome in the present existing lead-zinc sulfide ore floatation process, to containing marmatite, the existing fatal shortcoming of the complicated lead-zinc sulfide ore flotation of magnetic iron ore type, solution contains the difficult problem of marmatite, the complicated lead-zinc sulfide ore FLOTATION SEPARATION of magnetic iron ore type, special proposition the present invention.
Detailed technology scheme of the present invention may further comprise the steps:
(1) ore grinding adding pH adjustment agent makes the pH value remain on 9～10, adds pulp potential and adjusts agent, and regulating pulp potential is with respect to hydrogen normal potential 280～320mV, without desliming, directly enters flotation behind the ore grinding;
(2) lead minerals ramified flotation comprises the conventional flotation of lead minerals fast-flotation and lead minerals at least:
1. the lead minerals fast-flotation first time adds diethyl-dithio phosphoramidic acid sodium [(C
2H
5NH)
2PSSH] 20～50g/t raw ore and diethyldithiocarbamate [(C
2H
5)
2NCSSK] 10～25g/t raw ore mixture is as composite collector, and adding foaming agent 20～30g/t raw ore carries out the lead minerals fast-flotation;
2. the later mine tailing of lead minerals flotation is for the first time carried out the flotation second time and regulate pH to 11～12, regulating pulp potential is with respect to hydrogen normal potential 180～240mV, add collecting agent diethyl-dithio phosphoramidic acid sodium 10～20g/t raw ore, diethyldithiocarbamate 20～30g/t raw ore, add foaming agent 20g/t raw ore, conventional flotation;
(3) mine tailing pH values of pulp to 12～12.5 behind the floating lead of zinc sulphur flotation adjusting, adding copper sulphate 300～400g/t raw ore is activator; Regulate pulp potential to 180～220mV (with respect to the hydrogen normal potential), press mass ratio add at 1: 1 diethyl-dithio phosphoramidic acid sodium and diethyldithiocarbamate totally 30～50g/t raw ore as collecting agent, adding foaming agent 20～30g/t raw ore, conventional flotation.
Above-mentioned pH adjusts agent can select lime for use.
In step (1) and step (2), the adjusting of pulp potential can be by adding calcium hyposulfite (CaS
2O
4) realize that with zinc sulfate calcium hyposulfite mixes adding with zinc sulfate by mass ratio at 1: 1; In step (3), the adjusting of pulp potential can realize that calcium hyposulfite mixes adding with vulcanized sodium by mass ratio at 1: 1 by adding calcium hyposulfite and vulcanized sodium.
Above-mentioned grinding process can adopt wet ball mill to carry out, and the granularity of ore grinding overflow product accounts for about 60～75% for-0.074mm.
Above-mentioned foaming agent can be selected butyl ether alcohol for use.
Among the present invention, the lead minerals flotation is divided into roughly selects for the first time and conventional flotation for the second time, utilize the electrochemical floatation know-why, select different pH values of pulp, pulp potential condition respectively, realized the separation or the enrichment of lead zinc sulphur ore.Low pH value (the pH value is 9～10) and high potential 280～320mV (with respect to the hydrogen normal potential) are adopted in lead minerals flotation for the first time, utilize this pulp potential and pH condition, make diethyl-dithio phosphoramidic acid sodium, diethyldithiocarbamate and galena are had an effect, and not with marmatite, magnetic iron ore and gangue mineral react, and lead minerals (galena) surface hydrophobicity, therefore, can carry out FLOTATION SEPARATION to coarse grain in the ore easily floating galena and silver mineral, form plumbous rough concentrate, plumbous grade is 30～40%, lead recovery reaches more than 60%, and silver raising recovery rate is greater than 50%.Higher pH value (pH is 11～12) and low pulp potential 180～240mV (with respect to the hydrogen normal potential) are then adopted in lead minerals flotation for the second time, utilize this pulp potential and pH condition, can carry out FLOTATION SEPARATION to the difficult floating lead minerals of particulate.
Compared with prior art, the present invention has the following advantages:
(1) the present invention is in different ramified flotation steps, by adopting the electrochemical conditions of different control mineral floatings, and utilize new collecting agent diethyl-dithio phosphoramidic acid sodium and adjust agent, the lead minerals of different floatabilities according to the friction speed emersion, the grade of plumbous (silver) concentrate and the higher rate of recovery have been guaranteed.
(2) among the present invention, the collecting agent of same type is all adopted in vulcanized lead mineral floating and zinc sulfide mineral flotation, make the character basically identical of plumbum floatation waste water and zinc flotation waste water to help recycling of flotation waste water, and environmentally safe.
(3) the present invention adopts the ramified flotation method, makes floatation equipment reduce about 20%, more helps saving cost.
Description of drawings
Fig. 1: process chart of the present invention.
The specific embodiment
Embodiment 1
Yunnan contains marmatite, magnetic iron ore type complex lead-zinc silver sulphide ore, and these ore major metal mineral are galena, marmatite, magnetic iron ore.Main gangue mineral is quartz, calcite etc.Oxygenation efficiency plumbous in the ore is 11.87%, and the oxygenation efficiency of zinc is 4.87%, and the raw ore multielement analysis the results are shown in Table 1.
Table 1 raw ore multielement analysis
Adopt technological process as shown in Figure 1, concrete technological parameter is as follows:
1. grinding process: lime consumption 1000g/t raw ore, the granularity of ore grinding overflow product accounts for 60% for-0.074mm; Ore grinding overflow product adds zinc sulfate through agitator and calcium hyposulfite is pressed 1: 1 mixture, and consumption is the 800g/t raw ore, and pulp potential remains on 320mV (with respect to the hydrogen normal potential), and pH values of pulp is 9.0.
2. plumbous flotation for the first time: floatation concentration is 30%, diethyl-dithio phosphoramidic acid sodium consumption 20g/t raw ore, diethyldithiocarbamate consumption 10g/t raw ore, foaming agent butyl ether alcohol consumption 20g/t raw ore;
3. plumbous flotation for the second time: lime consumption 2000g/t raw ore, regulate pH to 11.0, add zinc sulfate and calcium hyposulfite by 1: 1 mixture, consumption is the 1000g/t raw ore, pulp potential remains on 180mV (with respect to the hydrogen normal potential).Collecting agent is a diethyl-dithio phosphoramidic acid sodium, and consumption is the 20g/t raw ore, and the diethyldithiocarbamate consumption is the 20g/t raw ore, and foaming agent butyl ether alcohol consumption is the 20g/t raw ore.
4. zinc flotation: lime 2000g/t, regulate pH values of pulp to 12., be activator with copper sulphate, consumption is the 300g/t raw ore; Add calcium hyposulfite and vulcanized sodium by 1: 1 mixture, consumption 800g/t raw ore, pulp potential is adjusted to 220mV (with respect to the hydrogen normal potential), diethyl-dithio phosphoramidic acid sodium and diethyldithiocarbamate are pressed 1: 1 mixture as collecting agent, consumption is the 30g/t raw ore, foaming agent butyl ether alcohol consumption 20g/t raw ore.
Technical indicator: the lead concentrate grade is 56.23%, lead recovery 88.15%, and silver raising recovery rate 61.23% in the lead concentrate, contains zinc 3.55% in the lead concentrate; Zinc concentrate grade 47.22%, zinc recovery 91.10%, silver raising recovery rate 19.25% in the zinc concentrate.
Embodiment 2
The Inner Mongol contains marmatite, magnetic iron ore type complex lead-zinc silver sulphide ore, and these ore major metal mineral are galena, marmatite, magnetic iron ore, mispickel etc.Main gangue mineral is feldspar, quartz, calcite etc.Oxygenation efficiency plumbous in the ore is 9.66%, and the oxygenation efficiency of zinc is 5.31%, and the raw ore multielement analysis the results are shown in Table 2.
Table 2 raw ore multielement analysis
Adopt technological process as shown in Figure 1, concrete technological parameter is;
1. grinding process: lime consumption 1000g/t raw ore, the granularity of ore grinding overflow product accounts for 75% for-0.074mm; Ore grinding overflow product adds zinc sulfate through agitator and calcium hyposulfite is pressed 1: 1 mixture, and consumption 1000g/t, pulp potential remain on 280mV (with respect to the hydrogen normal potential), pH values of pulp=10.0.
2. plumbous flotation for the first time: floatation concentration is 30%, diethyl-dithio phosphoramidic acid sodium consumption 50g/t raw ore, diethyldithiocarbamate consumption 25g/t raw ore, foaming agent butyl ether alcohol consumption 30g/t raw ore;
3. plumbous flotation for the second time: lime consumption 2500g/t raw ore, regulate pH to 12.0, add zinc sulfate and calcium hyposulfite by 1: 1 mixture, consumption 1500g/t raw ore, pulp potential remain on 180mV (with respect to the hydrogen normal potential).Collecting agent is diethyl-dithio phosphoramidic acid sodium consumption 20g/t, diethyldithiocarbamate consumption 30g/t raw ore, foaming agent butyl ether alcohol consumption 25g/t.
4. zinc flotation: lime 3000g/t, regulate pH values of pulp to 12.3, be activator with copper sulphate, consumption is 400g/t; Add calcium hyposulfite and vulcanized sodium by 1: 1 mixture, consumption 1000g/t, pulp potential is adjusted to 180mV (with respect to the hydrogen normal potential), diethyl-dithio phosphoramidic acid sodium and diethyldithiocarbamate are pressed 1: 1 mixture as collecting agent, consumption is the 50g/t raw ore, foaming agent butyl ether alcohol consumption 30g/t raw ore.
Technical indicator: the lead concentrate grade is 55.12%, lead recovery 89.03%, and silver raising recovery rate 62.78% in the lead concentrate, contains zinc 3.21% in the lead concentrate; Zinc concentrate grade 48.56%, zinc recovery 93.45%, silver raising recovery rate 18.03% in the zinc concentrate.
Claims (7)
1. one kind contains marmatite, magnetic iron ore type complex lead-zinc silver sulfide flotation method, it is characterized in that mainly may further comprise the steps:
(1) ore grinding adding pH adjustment agent makes the pH value remain on 9～10, and regulating pulp potential is with respect to hydrogen normal potential 280～320mV, without desliming, directly enters flotation behind the ore grinding;
(2) lead minerals ramified flotation comprises the conventional flotation of lead minerals fast-flotation and lead minerals at least:
1. the lead minerals fast-flotation first time adds diethyl-dithio phosphoramidic acid sodium [(C
2H
5NH)
2PSSH] 20～50g/t raw ore and diethyldithiocarbamate [(C
2H
5)
2NCSSK] 10～25g/t raw ore mixture is as composite collector, and adding foaming agent 20～30g/t raw ore carries out the lead minerals fast-flotation;
2. the later mine tailing of lead minerals flotation is for the first time carried out the flotation second time and regulate pH to 11～12, regulating pulp potential is with respect to hydrogen normal potential 180～240mV, add collecting agent diethyl-dithio phosphoramidic acid sodium 10～20g/t raw ore, diethyldithiocarbamate 20～30g/t raw ore, add foaming agent 20g/t raw ore, conventional flotation;
(3) mine tailing pH values of pulp to 12～12.5 behind the floating lead of zinc sulphur flotation adjusting, adding copper sulphate 300～400g/t raw ore is activator; Regulate pulp potential to 180～220mV (with respect to the hydrogen normal potential), press mass ratio add at 1: 1 diethyl-dithio phosphoramidic acid sodium and diethyldithiocarbamate totally 30～50g/t raw ore as collecting agent, adding foaming agent 20～30g/t raw ore, conventional flotation.
2. the method for claim 1 is characterized in that: it is lime that described pH adjusts agent.
3. the method for claim 1 is characterized in that: being adjusted in step (1) and the step (2) of described pulp potential by adding calcium hyposulfite and zinc sulfate realization, and calcium hyposulfite mixes adding with zinc sulfate by mass ratio at 1: 1; In step (3), realize that by adding calcium hyposulfite and vulcanized sodium calcium hyposulfite mixes adding with vulcanized sodium by mass ratio at 1: 1.
4. the method for claim 1, it is characterized in that: described ore grinding can adopt wet ball mill to carry out, and the granularity of ore grinding overflow product accounts for about 60～75% for-0.074mm.
5. method one of according to claim 1, it is characterized in that: described foaming agent is the butyl ether alcohol.
6. as the method one of as described in the claim 1～5, it is characterized in that: the flotation for the second time of described lead minerals comprises one roughing, once purging selection and recleaning, and once with the plumbous rough concentrate of lead minerals flotation for the first time merge selected.
7. as the method one of as described in the claim 1～5, it is characterized in that: the flotation of described zinc sulphur comprises one roughing, once purging selection and triple cleaning.
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