CN1943870A - Process for increasing complicated sulfurized-lead-zinc ore dressing recovery rate - Google Patents
Process for increasing complicated sulfurized-lead-zinc ore dressing recovery rate Download PDFInfo
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Abstract
The present invention is green process of recovering complicated lead-zinc sulfide ore in high recovering rate. The technological process adopts lime to form high alkalinity and maintain the original potential of lead-zinc sulfide slurry during ore grinding floatation, sodium diethyl dithioamino formate as the selective lead mineral collecting agent, copper sulfate as the sphalerite activating agent and butyl xanthate as the zinc mineral collecting agent for optimized successive fast floatation. The present invention has raised recovering rate, low chemical consumption, simple technological process and low production cost.
Description
Technical field
The present invention relates to a kind of technology that improves complicated sulfurized-lead-zinc ore dressing recovery rate, this technology belongs to green technology technology.
Background technology
Along with the fast development of Chinese society and technology, to the demand of plumbous zinc metal product.In recent years, along with the lead-zinc smelting production capacity is sharply expanded, cause the demand surge to lead and zinc concentrate, unauthorized and excessive mining is serious in addition, and domestic plumbous zinc ore produces resource reserve and sharply descends, and far can not satisfy needs of economic development.At present, the plumbous zinc resource in east China area is petered out, and the part large-scale mine of northeast, North China is closed successively, and the large-scale mine of South China is through exploitation for many years, reserves also obviously reduce, and the reserve strength of plumbous zinc industrial sustainable development is wretched insufficiency.The breach of China's lead and zinc concentrate supply in recent years is very big, and a large amount of import lead and zinc concentrates have become the main path that solves present starving problem, and China has become one of main demander in global lead and zinc concentrate market.Therefore, sophistication utilizes to greatest extent and improves existing plumbous zinc resource, and it is very important to increase lead and zinc concentrate output.
The ore dressing of lead-zinc ore separates tradition and adopts the plumbous flotation process of preferential choosing, in order to reach good separating effect, will add multiple a large amount of zincblende inhibitor when plumbum floatation, in floating zinc operation subsequently, also will add the zinc mineral activator.A large amount of addings of adjusting agent have further increased the consumption of collecting agent again, cause the flotation phenomenon of appearance " weight is heavily drawn ", make production cost raise, environmental pollution increases, when tcrude ore changes, be prone to unmanageable phenomenons such as " race grooves ", influence sorting index.
In view of this, seek advanced technology, efficient, with low cost, energy saving and environment friendly complex lead-zinc sulfide flotation novel technique is significant.
Summary of the invention
The purpose of this invention is to provide a kind of technology that improves complicated sulfurized-lead-zinc ore dressing recovery rate, can significantly improve plumbous zinc metal ore dressing recovery index.
A further object of the present invention provides a kind of lead zinc sulphur ore floating agent and implementation method, when improving plumbous zinc metal recovery rate, reduces dosing, reduces production costs and alleviates environmental protection pressure.
A further object of the present invention provides a kind of flotation flowsheet and configuration of easy to operate, designs simplification, saves investment and cuts down the consumption of energy.
For achieving the above object, the present invention takes following technical scheme:
A kind of technology that improves complicated sulfurized-lead-zinc ore dressing recovery rate of the present invention, the high basicity that this technology utilization lime causes are kept the primary current potential of lead zinc sulphur ore slurry in the grinding flotation process; Adopt sodium diethyldithiocarbamate as the lead minerals selective copper collector; Copper sulphate is as the activator of zincblende; Butyl xanthate is as the collecting agent of zinc mineral; Carry out the all-round excellent first fast-flotation of plumbous zinc successively, may further comprise the steps:
A. the floating agent prescription is formed:
Plumbum floatation operation prescription:, keep pulp potential-350～100mv with lime control grinding flotation pH values of pulp 10～14; Sodium diethyldithiocarbamate 10～100g/t; Terpenol 10～100g/t;
Zinc flotation operation prescription: copper sulphate 200～650g/t; Butyl xanthate 40～200g/t; Terpenol 10～100g/t;
B. medicament adds place and mode:
Lime and sodium diethyldithiocarbamate make an addition in the ball mill, and plumbous operation terpenol is added on classifier overflow mouth place, and all the other medicaments make an addition in the preceding tank diameter of flotation;
C. flotation process:
This flow process comprises no tank diameter before the plumbum floatation operation, and only one roughing once purging selection one obtains lead concentrate to recleaning;
The zinc flotation operation is scanned primary cleaning through the one roughing secondary and is obtained zinc concentrate and flotation tailing after tank diameter is sized mixing.
Sulfide ore carries out plumbous diffeential floatation fast after ore grinding is sized mixing separates, and especially accelerates the plumbous speed that scrapes of roughly selecting the foam rough concentrate.
Described floating agent keeps the ore grinding pH values of pulp to be not less than 12.5 with lime, and pulp potential is-310mv calomel reference electrode current potential.Use the collecting agent of sodium diethyldithiocarbamate as lead minerals, its consumption is 10～50g/t.Wherein, sodium diethyldithiocarbamate is commonly called as sulphur nitrogen 9# (English name is Diethyldithiocarbamate, is called for short DDTC).
Advantage of the present invention is:
Technological process of the present invention is consistent with the all-round excellent first flotation flowsheet of tradition, it still is the all-round excellent first flotation of plumbous zinc, different just adopt primary potential-controlled flotation technology, the primary current potential that utilizes sulphide ore in grinding process, to produce, the various key elements that comprise traditional floating operation factor by adjusting, reach raising and improve plumbous zinc floatation indicators and effect, make the complicated sulfuration mine thing obtain quick highly selective FLOTATION SEPARATION.It has two characteristics: the one, and main adjusting and control comprise traditional floating operation parameter of slurry pH, collecting agent kind, consumption and usage, flotation time and flotation flowsheet structure etc., the 2nd, do not adopt additional electrodes, do not use redox medicament regulation and control current potential.Compare with traditional floatation process, flotation technology of the present invention can (1) improve sorting index, and the metal recovery rate of general plumbous zinc on average improves 2～5 percentage points, and concentrate grade is higher simultaneously, and concentrate contains reduction mutually; (2) simplify flowage structure, save equipment investment and cut down the consumption of energy.Technology of the present invention is to separate with medicament effect and then generation fast-flotation under the best potential state of mineral, make flow process to shorten dramatically, plumbous operation can deduct the stirring mixing cirtern before the flotation, scanning number of times can reduce to once and even not scan, the selected number of times of zinc operation can reduce to once, totally can reduce volume of equipment and reach 1/3rd; (3) reduce reagent consumption, reduce production costs.It is about 2/3rds that the plumbous collecting agent of technology of the present invention can reduce, and can successfully realize the FLOTATION SEPARATION of the plumbous zinc mineral of high-sulfur under without the situation of zinc inhibitor; (4) production operation is stable, sorts in the process whole, and iron sulfide mineral is in the state of being suppressed all the time, and the variation of ore character is little to sorting influence.
Adopt technology of the present invention and traditional flotation technology technology under equal conditions to handle lead zinc sulphur ore stone, at aspects such as plumbous zinc floatation indicators, reagent consumption, flowage structure and energy consumptions, the technology of the present invention technology all has significant advantage, and economic benefit and social benefit are fairly obvious.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
The flotation process figure that Fig. 1 simplifies
Fig. 2 is for improving the process chart of complicated sulfurized-lead-zinc ore dressing recovery rate
Fig. 3 embodiment 1 test technology flow chart
Fig. 4 embodiment 2 test technology flow charts
Fig. 5 embodiment 3 technological processes and experimental condition
Fig. 6 embodiment 3 technological processes and condition
Fig. 7 embodiment 4 technological processes and condition
The specific embodiment
A kind of technology that improves complicated sulfurized-lead-zinc ore dressing recovery rate of the present invention, the high basicity that this technology utilization lime causes are kept the primary current potential of lead zinc sulphur ore slurry in the grinding flotation process; Adopt sodium diethyldithiocarbamate as the lead minerals selective copper collector; Copper sulphate is as the activator of zincblende; Butyl xanthate is as the collecting agent of zinc mineral; Carry out the all-round excellent first fast-flotation of plumbous zinc successively, may further comprise the steps:
A. the floating agent prescription is formed:
Plumbum floatation operation prescription:, keep pulp potential-350～100mv with lime control grinding flotation pH values of pulp 10～14; Sodium diethyldithiocarbamate 10～100g/t; Terpenol 10～100g/t;
Zinc flotation operation prescription: copper sulphate 200～650g/t; Butyl xanthate 40～200g/t; Terpenol 10～100g/t;
B. medicament adds place and mode:
Lime and sodium diethyldithiocarbamate make an addition in the ball mill, and plumbous operation terpenol is added on classifier overflow mouth place, and all the other medicaments make an addition in the preceding tank diameter of flotation;
C. flotation process:
This flow process comprises no tank diameter before the plumbum floatation operation, and only one roughing once purging selection one obtains lead concentrate to recleaning;
The zinc flotation operation is scanned primary cleaning through the one roughing secondary and is obtained zinc concentrate and flotation tailing after tank diameter is sized mixing.
Sulfide ore carries out plumbous diffeential floatation fast after ore grinding is sized mixing separates, and especially accelerates the plumbous speed that scrapes of roughly selecting the foam rough concentrate.
As shown in Figure 2, in ball mill, add lime (adding) and lead minerals selective copper collector DDTC (adding) with 10wt% solution form with dry type or emulsion form, add a certain amount of terpenol foaming agent at the classifier overflow mouth, carry out plumbous diffeential floatation fast and obtain lead concentrate, select plumbous mine tailing through copper sulphate for activation, adopt butyl xanthate and terpenol diffeential floatation zinc to obtain zinc concentrate and mine tailing.
Embodiment 1
The ore character of present embodiment 1 is: lead zinc sulphur ore raw ore multielement content (wt%): Pb 5.6, Zn6.61, and S 21.27, and Fe 16.97, and Cu 0.02, and As 0.33, and Ca 3.49, and Mg 0.49, SiO
218.6 Al 0.74, Ag 63.3g/t, Au 0.7g/t.The ore oxidation rate is Pb5.75%, Zn6.99%.Major metal mineral in the ore are galena, zincblende, pyrite, magnetic iron ore, and other has a small amount of melnikovite, marcasite, chalcopyrite, mispickel, vitreous copper, copper orchid, tetrahedrite, limonite and argentite, native silver and electrum; Gangue mineral mainly is quartz, chlorite, sericite, calcite, and other has a small amount of gypsum, dolomite, siderite, muscovite and clay mineral.
The technical matters condition of embodiment 1 is: pH values of pulp 12.8, pulp potential-255mv, selecting process and regime of agent such as Fig. 3.
Embodiment 1 laboratory is comprehensive closed circuit to the results are shown in Table 1.
Table 1 embodiment 1 test index comparing result
| Technological process | Head grade (%) | Concentrate grade (%) | Contain assorted (%) | The rate of recovery (%) | ||||
| Pb | Zn | Pb | Zn | Pb contains Zn | Zn contains Pb | Pb | Zn | |
| Former flow process is average | 5.29 | 6.2 3 | 75.13 | 49.40 | 2.64 | 1.00 | 93.38 | 89.55 |
| Technology of the present invention | 5.66 | 6.6 1 | 73.94 | 51.65 | 2.18 | 0.27 | 95.56 | 93.54 |
Test obtains lead concentrate and contains Pb73.94%, Ag860.6g/t, and the rate of recovery plumbous and silver is respectively 95.56% and 88.68%, and zinc concentrate contains Zn51.65%, and zinc recovery is 93.54%.Compare with former flow process average index, the plumbum floatation rate of recovery improves 2.18 percentage points, and the zinc concentrate grade improves 2.25 percentage points, and zinc recovery improves 3.99 percentage points.Flotation flowsheet is simplified to for once that lead is roughly selected and is once plumbous selected, and zinc is only one roughing, primary cleaning and once purging selection also.
Embodiment 2
The ore character of present embodiment 2 is identical with embodiment 1 with mineral composition, and head grade is: Pb4.36～4.62%, and Zn 5.71～5.97%, and oxygenation efficiency is Pb12.42%, Zn8.62%.
The technical matters condition of present embodiment 2 is: pH values of pulp 12.3, and current potential-320mv, regime of agent is: DDTC33g/t, terpenol 50g/t, copper sulphate 450g/t, butyl xanthate 100g/t.Sort flow process and see Fig. 4.Commercial test results sees Table 2.
Table 2 embodiment 2 result of the tests and former result of flow average index are relatively
| Flow process | Head grade (%) | Concentrate grade (%) | Contain assorted (%) | The rate of recovery (%) |
| Pb | Zn | Pb | Zn | Pb contains Zn | Zn contains Pb | Pb | Zn | |
| Former flow process is average | 4.36 | 5.7 1 | 73.77 | 49.63 | 2.54 | 0.81 | 91.86 | 86.44 |
| Technology of the present invention | 4.62 | 5.9 7 | 79.19 | 49.85 | 2.10 | 0.52 | 93.69 | 88.83 |
On year-on-year basis, embodiment 2 the technology of the present invention technology lead recoveries exceed 1.83 percentage points, and lead concentrate master grade improves 5.42 percentage points, and zinc recovery improves 2.39 percentage points, and lead and zinc concentrate contains further reduction mutually.The plumbous collecting agent of floating agent consumption reduces more than 2/3rds, and it is about 20% that copper sulphate reduces, and on average saves 2.85 yuan/t of floating agent cost tcrude ore.Sort flow process lead and scan the flotation cell number and can reduce half, zinc only gets final product through primary cleaning, is the 4.57Kwh/t tcrude ore because of reducing the energy-conservation of floatation equipment on average.
Embodiment 3
The ore character of present embodiment 3 is identical with embodiment 1 with mineral composition, and process conditions are: pH values of pulp 11.5, and current potential-220mv, regime of agent and sort flow process and see Fig. 5 and Fig. 6, laboratory results sees Table 3.
Table 3 embodiment 3 laboratory test results
| Name of product | Productive rate, % | Grade, % Pb Zn | Rate of recovery % Pb Zn | Experiment process and condition |
| Lead concentrate 1 lead concentrate 2 zinc concentrates 1 zinc concentrate 2 zinc concentrates 3 mine tailings add up to | 9.50 1.70 10.79 3.25 1.02 73.74 100.00 | 68.87 7.03 1.96 6.90 0.087 48.73 0.60 3.66 1.31 22.96 0.21 0.31 6.77 6.63 | 96.60 10.08 0.49 1.77 0.14 79.37 0.29 1.80 0.20 3.54 2.29 3.45 100.0 100.0 | Fig. 5 technology of the present invention |
| Lead concentrate 1 lead concentrate 2 zinc concentrates 1 zinc concentrate 2 sulphur concentrate mine tailings add up to | 10.75 4.63 14.55 3.60 23.45 43.02 100.00 | 59.80 4.26 2.90 12.00 0.63 38.16 0.63 18.04 0.10 2.50 0.28 0.37 6.82 7.96 | 94.25 5.75 1.97 6.98 1.34 69.75 0.33 8.16 0.34 7.36 1.77 2.00 100.0 100.0 | The former technological process of Fig. 6 |
Result of the test shows, no matter technology of the present invention still be aspect the metal recovery rate at concentrate grade, all has greater advantage.
Embodiment 4
The ore character of present embodiment 4 is identical with embodiment 1 with mineral composition, and process conditions are chosen lime and regulated different pH values of pulp and current potential, regime of agent and sort flow process and see Fig. 7, and laboratory results sees Table 4.
The laboratory results of table 4 embodiment 4
| Name of product | Productive rate % | Grade, % Pb Zn | The rate of recovery, % Pb Zn | Pulp PH value and current potential |
| The rough concentrate mine tailing adds up to | 16.4 83.6 100.00 | 32.95 13.37 0.36 4.73 5.70 6.15 | 94.72 35.67 5.28 64.33 100.0 100.0 | PH8.7 -105mv |
| The rough concentrate mine tailing adds up to | 11.5 88.5 100.00 | 47.14 13.29 0.31 5.03 5.70 5.98 | 95.18 24.56 4.82 75.44 100.0 100.0 | PH11.2 -200mv |
| The rough concentrate mine tailing adds up to | 8.85 91.15 100.00 | 62.54 3.02 0.29 5.69 5.80 5.45 | 95.44 4.90 4.56 95.10 100.0 100.0 | PH12.5 -234mv |
| Rough concentrate | 8.10 91.90 | 64.75 1.09 0.27 5.92 | 95.48 1.60 4.529 8.40 | PH12.8 -285mv |
| Mine tailing adds up to | 100.00 | 5.49 5.53 | 100.0 100.0 |
The result shows that along with pulp PH value increases and the increase of pulp potential negative sense, lead is roughly selected the zinc mineral amount that floats in the concentrate and reduced gradually, and the floatability of lead minerals is not affected, and more helps the FLOTATION SEPARATION of plumbous zinc.
In sum, technical matters prescription of the present invention can significantly improve complex lead-zinc sulphide ore mineral processing index, reduces reagent consumption, simplifies the technological process of production, reduces production costs and saves investment.Have tangible economic benefit and environmental benefit.
Claims (4)
1, a kind of technology that improves complicated sulfurized-lead-zinc ore dressing recovery rate is characterized in that high basicity that this technology utilization lime causes keeps the primary current potential of lead zinc sulphur ore slurry in the grinding flotation process; Adopt sodium diethyldithiocarbamate as the lead minerals selective copper collector; Copper sulphate is as the activator of zincblende; Butyl xanthate is as the collecting agent of zinc mineral; Carry out the all-round excellent first fast-flotation of plumbous zinc successively, may further comprise the steps:
A. the floating agent prescription is formed:
Plumbum floatation operation prescription:, keep pulp potential-350～100mv with lime control grinding flotation pH values of pulp 10～14; Sodium diethyldithiocarbamate 10～100g/t; Terpenol 10～100g/t;
Zinc flotation operation prescription: copper sulphate 200～650g/t; Butyl xanthate 40～200g/t; Terpenol 10～100g/t;
B. medicament adds place and mode:
Lime and sodium diethyldithiocarbamate make an addition in the ball mill, and plumbous operation terpenol is added on classifier overflow mouth place, and all the other medicaments make an addition in the preceding tank diameter of flotation;
C. flotation process:
This flow process comprises no tank diameter before the plumbum floatation operation, and only one roughing once purging selection one obtains lead concentrate to recleaning;
The zinc flotation operation is scanned primary cleaning through the one roughing secondary and is obtained zinc concentrate and flotation tailing after tank diameter is sized mixing.
2. a kind of technology that improves complicated sulfurized-lead-zinc ore dressing recovery rate according to claim 1 is characterized in that: sulfide ore carries out plumbous diffeential floatation fast after ore grinding is sized mixing separates, and especially accelerates the plumbous speed that scrapes of roughly selecting the foam rough concentrate.
3. a kind of technology that improves complicated sulfurized-lead-zinc ore dressing recovery rate according to claim 1 is characterized in that described floating agent keeps the ore grinding pH values of pulp to be not less than 12.5 with lime, and pulp potential is-310mv calomel reference electrode current potential.
4. a kind of technology that improves complicated sulfurized-lead-zinc ore dressing recovery rate according to claim 1 is characterized in that using the collecting agent of sodium diethyldithiocarbamate as lead minerals, and its consumption is 10～50g/t.
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| CN109833978A (en) * | 2019-03-28 | 2019-06-04 | 广东省资源综合利用研究所 | A method of improving silver lead zinc ore argentalium mineral processing index |
| CN112221699A (en) * | 2020-10-21 | 2021-01-15 | 厦门紫金矿冶技术有限公司 | Clean and efficient beneficiation method for complex gold, silver, copper, lead and zinc-containing composite ore |
| CN114042539A (en) * | 2021-11-17 | 2022-02-15 | 水口山有色金属有限责任公司 | Efficient collecting agent for separating zinc from lead-zinc sulfide ore and zinc separating method thereof |
| CN114653469A (en) * | 2022-03-22 | 2022-06-24 | 白银有色集团股份有限公司 | Re-concentration process for sulfur concentrate in complex multi-metal sulfide ore |
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