CN1275629A - Method for treating high zinc infusible fine copper ore - Google Patents
Method for treating high zinc infusible fine copper ore Download PDFInfo
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- CN1275629A CN1275629A CN 00110342 CN00110342A CN1275629A CN 1275629 A CN1275629 A CN 1275629A CN 00110342 CN00110342 CN 00110342 CN 00110342 A CN00110342 A CN 00110342A CN 1275629 A CN1275629 A CN 1275629A
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Abstract
A method for treating high-zinc infusible copper concentrate is characterized by using blast furnace smelting process to treat high-zinc copper concentrate whose zinc content is 4-9%, and said method includes the following steps: firstly mixing high-zinc copper concentrate with general copper concentrate and gold concentrate, uniformly stirring them, in which the high-zinc copper concentrate content is 5-30% of total mixture quantity, zinc content is 3-6% of mixture material and silicon dioxide content is 8-10%, adding all materials into blast furnace and making smelting under the condition of high blast pressure, heavy blast volume, high oxygen concentration and high coke rate and selecting high melting point slag type. Said invention can fully utilize existent condition, can greatly reduce cost, and its operation is simple and easy.
Description
The present invention relates to a kind of method of handling high zinc infusible fine copper ore, belong to the pyrometallurgical smelting technology of non-ferrous metal, the producer that is fit to the traditional blast furnace smelting process of domestic employing uses when processing contains the infusible fine copper ore of zinc height (mainly existing with the zinc sulphide form).
High zinc infusible fine copper ore is called as " dirty ore deposit " on international copper raw material market, thus because of bad processing price lower.At present, the method that people are adopted when handling high zinc infusibility copper mine has: the one, with the roasting of high zinc-copper concentrate, smelt again after making wherein zinc sulphide become zinc oxide; The 2nd, carry out hydrometallurgy; The 3rd, add high zinc infusible fine copper ore during mix on a small quantity, make the zinc content that mixes in the copper ore concentrates of back less than 2% (weight percentage, down together).Though above-mentioned several treatment process can be smelted, and all exists the cost height, shortcoming that can not the mass disposal high zinc infusible fine copper ore.In recent years, the external high zinc infusible fine copper ore of domestic certain factory import once, attempt utilizes existing blast furnace apparatus and process to carry out large-scale type approval test, but find in test: adopt traditional blast furnace smelting process, it is copper ore concentrates heap formula mix-blast furnace smelting-bessemerize-refining furnace refining-anode blister copper, even the high zinc infusible fine copper ore amount that adds only accounts for about 5% (weight percentage of copper ore concentrates total amount behind the mix, different), still can cause the blast furnace meltage to descend, the slag cupric raises, throat stream, siphon jet and slag stream are not smooth, and the working of a furnace worsens and matte output reduces 20%.When the high zinc infusible fine copper ore amount that adds accounted for 30%, melt was clamminess in the stove, slag irritates dead on the air port, the external crucible diaphragm is serious, up to dead stove.After the high zinc infusible fine copper ore ore deposit amount that adds is reduced to below 5%, normally carry out though can guarantee melting this moment, the equal underproduction about 1/4 of the treatment capacity of blast furnace and matte output, thereby cause the failure of type approval test.
Purpose of the present invention, just be to overcome the problem that the above-mentioned background technology exists, after high zinc infusible fine copper ore is analysed in depth research, provided one to after the suitable improvement of existing blast furnace production technique, just can utilize traditional drum wind furnace equipment to handle the method for high zinc infusible fine copper ore, thereby for manufacturing enterprise reduces cost, increase economic efficiency and product market competitiveness has been created condition, also opened an outlet for a large amount of similar copper ore concentratess that overstock on the international copper raw material market.
The method of this processing high zinc infusible fine copper ore that the present invention provides, fully taken into account the high zinc infusible fine copper ore (for example from state's imports such as Turkey, Mexico) from external import, the content of zinc often fluctuates between 4.16-8.97%, it is zinc sulphide that the existence form of zinc in the copper essence has more than 80%, and zinc sulphide participates in reaction hardly in blast furnace, and most of (about about 85%) are with ZnS.Cu
2The S form is fused in the matte.When temperature reduces in case the working of a furnace changes, zinc sulphide can be separated out from matte, at the stove internal crucible, external crucibles etc. locate to produce diaphragm, cause melt to be clamminess, throat stops up, slag, dead stove and slag cupric raise on the air port, has only small part zinc sulphide to be oxidized to zinc oxide and enters this reality of going in the slag with silicon dioxde reaction, thereby in the mixing stockpile burdening and blast furnace smelting operation of copper ore concentrates, requirement must be accomplished:
A) at first with high zinc infusible fine copper ore with contain zinc less than 2% copper ore concentrates, contain silicon-dioxide greater than 30% gold ore (weight percentage, it is even to mix puddle down together), wherein the high zinc infusible fine copper ore of Tou Ruing is for mixing the 5-30% of back copper ore concentrates total amount, and zinc content 3-6%, dioxide-containing silica are 8-10% in the copper ore concentrates of mixing back;
B) will mix the back copper ore concentrates then and drop into blast furnace, at high blast (50-57mmHg), big air quantity (2.0-2.5 ten thousand m
3/ h), melting under the high oxygen concentration (28-32%), high coke yield (8.5-12%) condition, be beneficial to the oxidation of zinc sulphide, for guaranteeing that melt has enough temperature of superheat, the focal area should guarantee to be controlled between 1350-1400 ℃, therefore must select high-melting-point slag type for use, be that silicon-dioxide is that 36-38%, ferric oxide are that 25-28%, calcium oxide are 11-13% in the slag type, slag type fusing point should be more than or equal to 1150 ℃.Also effectively prevent stove internal crucible and the phrenic generation of external crucible with the fusing of accelerating furnace charge.
Compared with the prior art, the present invention has equipment and the processing condition that make full use of existing blast furnace smelting flow process, and is simple and easy to do, red-tape operati is easy, and characteristics such as effectively reduce production costs.
Embodiment
The selected equipment of the type approval test that the present invention carried out is 11m
2The closed blast furnace, the high 2.65m batch of material of stock column amount is that 4t/ criticizes, and tests under the oxygen-enriched air smelting condition.Selected high zinc infusible fine copper ore is from state's import copper ore concentratess such as Turkey and Mexico, the chemical constitution of its high zinc infusible fine copper ore, the Chemical Composition of ordinary copper concentrate, gold ore and mixing back copper ore concentrates sees Table the chemical constitution table weight percent % of 1 table 1 copper-contained material
| Cu | S | Fe | SIO 2 | Zn | |
| Turkey (1) | 19.44 | 31.89 | 27.47 | 3.84 | 8.97 |
| Turkey (2) | 23.08 | 35.53 | 32.31 | 0.49 | 4.16 |
| Mexico | 20.60 | 30.41 | 23.79 | 2.12 | 7.94 |
| The ordinary copper essence | 19.79 | 30.51 | 27.83 | 3.06 | 1.02 |
| Gold ore | 1.06 | 32.35 | 28.36 | 30.03 | 0.12 |
| Mix the back copper ore concentrates | 18.73 | 28.36 | 27.76 | 9.31 | 4.32 |
In the copper ore concentrates, the high zinc infusible fine copper ore add-on is for mixing 30% of back total amount after the mixing in table 1.At first by charger sheet high zinc infusible fine copper ore, ordinary copper concentrate, gold ore are mixed into windrow formula batching, smash material at least three times, make that zinc content is 3-6% in the mixed copper ore concentrates, dioxide-containing silica is 8-10%.
In order to improve treatment capacity, to reduce the slag cupric, prevent that zinc sulphide from separating out at stove internal crucible, external crucible, guarantee furnace condition anterograde, high oxygen concentration, high coke yield and high-melting-point slag type when blast furnacing, have been adopted, thereby focal area temperature and melt overheat temperature have been improved, table 2, table 3 mix 30% o'clock of back copper ore concentrates for high zinc infusible fine copper ore accounts for, mixed oxygen concn is the technical qualification and the result of the oxygen-enriched air smelting commerical test of 28-32%.
The technical qualification of table 2 oxygen enrichment commerical test
| Numbering | Compound is formed (weight %) | Blast | Air quantity | The oxygen amount | Oxygen is dense | The batch of material amount | The piece rate | Burnt rate | |||
| ?????1 | ??????Cu | ???S | ??SiO 2 | ???Zn | ??54 | ??2.178 | ??2200 | ??29.50 | ???4.0 | ???50 | ???9.5 |
| ?????2 | ????18.44 | ??29.78 | ??7.01 | ??5.09 | ??56 | ??2.080 | ??2200 | ??29.50 | ???4.0 | ???48 | ???10.5 |
| ?????3 | ????17.13 | ??29.93 | ??8.94 | ??4.84 | ??55 | ??2.380 | ??2200 | ??29.50 | ???4.0 | ???48 | ???8.5 |
| ?????4 | ????18.26 | ??30.01 | ??8.03 | ??4.30 | ??57 | ??2.080 | ??2200 | ??30.00 | ???4.0 | ???46 | ???9.0 |
| ?????5 | ????18.57 | ??30.46 | ??7.86 | ??4.77 | ??56 | ??2.380 | ??2200 | ??28.32 | ???4.0 | ???50 | ???10.5 |
| ?????6 | ????19.31 | ??30.56 | ??8.64 | ??5.75 | ??55 | ??2.178 | ??2300 | ??30.50 | ???4.0 | ???48 | ???9.0 |
| ?????7 | ????18.68 | ??30.38 | ??9.02 | ??4.63 | ??57 | ??2.21 | ??2300 | ??30.56 | ???4.0 | ???48 | ???8.5 |
| ?????8 | ????18.36 | ??29.89 | ??8.13 | ??5.07 | ??56 | ??2.300 | ??2300 | ??29.95 | ???4.0 | ???45 | ???8.5 |
| ?????9 | ????17.97 | ??30.94 | ??8.42 | ??4.95 | ??54 | ??2.080 | ??2300 | ??31.06 | ???4.0 | ???46 | ???8.5 |
| ?????10 | ????18.27 | ??29.91 | ??8.05 | ??3.90 | ??56 | ??2.100 | ??2300 | ??30.50 | ???4.0 | ???50 | ???9.0 |
| On average | ????18.25 | ??30.12 | ??8.22 | ??4.75 | ??55.6 | ??2.190 | ??2250 | ??29.94 | ???4.0 | ???47.9 | ???9.15 |
The result of table 3 oxygen enrichment commerical test
| Number of times | Matte is formed (% weight) | Fusion | The bed ability | Slag is formed (% weight) | ||||||||
| ????Cu | ???S | ???Fe | ???Zn | ???T | ????T/d | ????T/M 2d | ???Cu | ??SiO 2 | ???Fe | ???CaO | ???Zn | |
| ????1 | ??37.56 | ?25.03 | ??30.16 | ??3.32 | ??384 | ????660 | ????40 | ??0.25 | ??36.56 | ?26.29 | ?12.16 | ??3.33 |
| ????2 | ??37.90 | ?24.94 | ??29.53 | ??3.12 | ??308 | ????678 | ????38.5 | ??0.307 | ??36.86 | ?27.73 | ?11.07 | ??3.27 |
| ????3 | ??37.08 | ?24.35 | ??31.19 | ??3.54 | ??317 | ????672 | ????39.16 | ??0.291 | ??35.92 | ?29.07 | ?12.06 | ??3.45 |
| ????4 | ??38.29 | ?24.10 | ??30.78 | ??3.42 | ??325 | ????682 | ????38.27 | ??0.285 | ??36.43 | ?28.14 | ?10.93 | ??3.36 |
| ????5 | ??38.61 | ?24.63 | ??30.73 | ??3.18 | ??310 | ????648 | ????39.27 | ??0.266 | ??36.29 | ?27.71 | ?10.53 | ??3.30 |
| ????6 | ??38.98 | ?23.80 | ??29.06 | ??3.22 | ??345 | ????696 | ????40.55 | ??0.299 | ??37.60 | ?26.87 | ?10.60 | ??3.80 |
| ????7 | ??38.78 | ?23.89 | ??29.28 | ??2.91 | ??329 | ????684 | ????39.86 | ??0.281 | ??36.53 | ?27.50 | ?11.57 | ??3.14 |
| ????8 | ??38.43 | ?23.78 | ??28.35 | ??3.21 | ??321 | ????678 | ????37.02 | ??0.300 | ??37.28 | ?28.79 | ?12.85 | ??3.19 |
| ????9 | ??39.10 | ?23.88 | ??28.73 | ??3.16 | ??317 | ????690 | ????38.72 | ??0.298 | ??37.10 | ?25.92 | ?10.31 | ??3.21 |
| ????10 | ??42.01 | ?23.83 | ??27.72 | ??2.65 | ??308 | ????708 | ????42.54 | ??0.289 | ??38.01 | ?28.01 | ?11.91 | ??3.40 |
| On average | ??38.674 | ?24.22 | ??29.55 | ??3.173 | ??387 | ????680 | ????39.39 | ??0.287 | ??36.86 | ?27.60 | ?11.40 | ??3.35 |
Above-mentioned commerical test shows, this method of utilizing traditional drum wind furnace sweetening process to handle high zinc infusible fine copper ore that adopts the present invention to provide is not only reasonable economically, also is feasible technically.When the high zinc infusible fine copper ore add-on account for mix back copper ore concentrates total amount 30% the time, fusing speed is still very fast in the stove, the slag cupric is lower than 0.3%, blast furnace internal crucible and external crucible are provided with and the diaphragm phenomenon occurs, zinc sulphide enters the matte amount and is reduced to 50% by original 85%, in addition 50% is oxidized to the zinc oxide slag making or volatilization is gone out.
Claims (1)
1, a kind of method of handling high zinc infusible fine copper ore includes the operation such as mixing stockpile burdening, blast furnace smelting of copper ore concentrates, it is characterized in that:
A) at first with high zinc infusible fine copper ore with contain zinc less than 2% copper ore concentrates, contain silicon-dioxide greater than 30% gold ore (weight percentage, it is even to mix puddle down together), wherein the high zinc infusible fine copper ore of Tou Ruing is for mixing the 5-30% of back copper ore concentrates total amount, and zinc content is that 3-6%, dioxide-containing silica are 8-10% in the copper ore concentrates of mixing back;
B) will mix the back copper ore concentrates then and drop into blast furnace, at high blast (50-57mmHg), big air quantity (2.0-2.5 ten thousand m
3/ h), melting under the high oxygen concentration (28-32%), high coke yield (8.5-12%) condition, silicon-dioxide is that 36-38%, ferric oxide are that 25-28%, calcium oxide are 11-13% in the blast furnace slag type, slag type fusing point should be more than or equal to 1150 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00110342 CN1275629A (en) | 2000-04-21 | 2000-04-21 | Method for treating high zinc infusible fine copper ore |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00110342 CN1275629A (en) | 2000-04-21 | 2000-04-21 | Method for treating high zinc infusible fine copper ore |
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| CN1275629A true CN1275629A (en) | 2000-12-06 |
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| CN 00110342 Pending CN1275629A (en) | 2000-04-21 | 2000-04-21 | Method for treating high zinc infusible fine copper ore |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303235C (en) * | 2004-10-29 | 2007-03-07 | 云南云铜锌业股份有限公司 | Dressing and smelting united technology for processing refractory copper zinc ore mixtures |
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2000
- 2000-04-21 CN CN 00110342 patent/CN1275629A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303235C (en) * | 2004-10-29 | 2007-03-07 | 云南云铜锌业股份有限公司 | Dressing and smelting united technology for processing refractory copper zinc ore mixtures |
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