CN103436705B - Method used for processing copper dross by oxygen-enriched top-blown furnace - Google Patents
Method used for processing copper dross by oxygen-enriched top-blown furnace Download PDFInfo
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- CN103436705B CN103436705B CN201310316238.0A CN201310316238A CN103436705B CN 103436705 B CN103436705 B CN 103436705B CN 201310316238 A CN201310316238 A CN 201310316238A CN 103436705 B CN103436705 B CN 103436705B
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Abstract
The invention discloses a method used for processing copper dross by an oxygen-enriched top-blown furnace, and belongs to the field of thermometallurgical technology. Continuous charging, and discontinuous discharging of slag and lead are employed. The method comprises following steps: 1) copper dross and raw coal are continuously delivered into the oxygen-enriched top-blown furnace for smelting at a speed of 20 to 30t/h and a speed of 1.5 to 2.5t/h respectively; 2) the mixture is smelted for 2 to 3h at a temperature of 750 to 900 DEG C so as to separate metallic lead from copper in the copper dross, and then the temperature is raised to 1000 to 1200 DEG C, and the mixture is smelt for 2.5 to 3.5h, so that metallic lead and compound lead are both transformed into crude lead, copper is transformed into copper matte, and the separation of copper and lead is realized; 3) the delivery speed of raw coal is reduced to 0.5 to 1t/h, the mixture is subjected to clarification and separation for 0.5 to 1.5h, the delivery of raw coal is stopped, crude lead and copper matte are discharged via a lead feed inlet, slag is discharged after two times of the smelting processing listed above, flue gas is mixed with other SO2 gas after waste heat recovery and dust collection, and the mixed gas is delivered for acid recovery. The method can be used for processing large amount of copper dross, metal recovery rate is high, raw coal is used both as fuel and a reducing agent, production cost is low, and industrialized application of the method is realized.
Description
Technical field
The present invention relates to a kind of method of oxygen-enriched top blowing stove process copper dross slag, belong to field of thermometallurgical technology.
Background technology
Copper dross slag is the product of fire refining of crude lead liquation decoppering, and its main component is plumbous and copper, generally leaded 60% ~ 80%, and cupric 3% ~ 25%, argentiferous 100 ~ 1000g/t, also containing other elements such as antimony, sulphur, arsenic, zinc, tin, cobalt, nickel, gold.At present, domestic and international plumbous smeltery all adopts corresponding copper dross slag treatment process according to self present situation, is mainly divided into pyrogenic process and wet method.The wet method lead skim that output is a large amount of when leaching, carrys out difficulty greatly to liquid-solid decoupled band, applies less; Pyrogenic process is different according to equipment used, can be divided into Blast Furnace Method, reflection oven process, electric furnace process, converter process and side-blown oven process etc.Blast Furnace Method asunder copper and lead is not thorough, and metal recovery rate is lower; Reflection oven process energy consumption is high, furnace life is short, environment is undesirable; Electric furnace process current consumption is high, and need to add coke and make reductive agent, production cost is high; Converter process makees reductive agent with coal, does fuel with diesel oil, and energy consumption is higher; Side-blown oven process uses hard coal as fuel and reductive agent, and energy consumption is lower, but unrealized scale process so far.
Summary of the invention
The object of the invention is the deficiency for existing copper scum silica frost treatment technology, the copper dross slag treatment process of a kind of less energy-consumption, low cost, format high throughput is provided.
The technical solution adopted for the present invention to solve the technical problems is:
A method for oxygen-enriched top blowing stove process copper dross slag, the present invention is characterised in that, comprises the following steps:
1) by copper dross slag 20 ~ 30t/h and raw coal 1.5 ~ 2.5t/h, continuous uniform after mixing granulation adds in oxygen-enriched top blowing stove and carries out melting;
2) smelt 2 ~ 3 hours at 750 ~ 900 DEG C of temperature, metal form in copper dross slag lead is separated with copper, 2.5 ~ 3.5 hours are smelted again under being then warming up to 1000 ~ 1200 DEG C of temperature, metallic lead in copper dross slag and chemical combination state lead are all entered lead bullion by melting, and copper then enters matte and realizes asunder copper and lead;
3) raw coal add-on is down to 0.5 ~ 1t/h, clarified separation, after 0.5 ~ 1.5 hour, stops into coal, releases lead bullion and matte, carry out slagging again after continuous smelting two heats from plumbous mouth, flue gas through waste heat recovery, gather dust after with other SO
2relieving haperacidity is sent in flue gas mixing.
In step 1) of the present invention, the composition of described copper dross slag is leaded 60% ~ 80%, cupric 3% ~ 25%, argentiferous 100 ~ 1000g/t, and impurity.
In step 1) of the present invention, the composition of described raw coal is for containing charcoal 45% ~ 60%, sulfur-bearing 0.1% ~ 4%, ash content 15 ~ 35%, volatile matter 14 ~ 25%.
Step 2 of the present invention) in, controlling oxygen-enriched top blowing stove air quantity in described smelting process is: 2.5 ~ 3.5Nm
3/ s.
Step 2 of the present invention) in, find in described smelting process slag glue mobility bad time, carry out the mode of Slag form regulation for adding 10 ~ 15t/h lead ore concentrate.
The whole melting of the present invention, slagging, put in plumbous process and all do not stop charging, release lead bullion and matte every 5 ~ 6 hours, release lead-rich slag every 11 ~ 12 hours, stop in discharge process into coal, be incubated with diesel oil, diesel oil consumption is 0.5 ~ 1.5% of copper dross slag.
The calorific value of the present invention's raw coal used is 4500 ~ 5500kcalkg
-1, raw coal consumption is 6% ~ 8% of copper dross slag.
The advantage that the present invention has compared with other pyrogenic attack copper dross slag technology:
1) treatment capacity is large.Production practice prove: oxygen-enriched top blowing stove process copper dross slag siege ability can reach 55t/m
2more than d, and the oven process that blows side is at 50t/m
2more than d, reverberatory furnace, rotary kiln, converter are at 4t/m
2below d, electric furnace is at 12t/m
2below d.
2) more energy-conservation.
Table 1 common copper dross slag treatment process energy consumption index
As can be seen from Table 1, energy consumption of the present invention is lower than the energy consumption of other several techniques.The present invention uses raw coal as fuel and reductive agent, and other several coke, electric energy or diesel oil of employing, therefore the present invention is more economical.
Below in conjunction with accompanying drawing and embodiment, the present invention is further explained.
Accompanying drawing explanation
Fig. 1 is the process flow sheet that the present invention adopts.
Embodiment
A method for oxygen-enriched top blowing stove process copper dross slag, the present invention is characterised in that, comprises the following steps:
1) by copper dross slag 20 ~ 30t/h and raw coal 1.5 ~ 2.5t/h, continuous uniform after mixing granulation adds in oxygen-enriched top blowing stove and carries out melting;
2) smelt 2 ~ 3 hours at 750 ~ 900 DEG C of temperature, metal form in copper dross slag lead is separated with copper, 2.5 ~ 3.5 hours are smelted again under being then warming up to 1000 ~ 1200 DEG C of temperature, metallic lead in copper dross slag and chemical combination state lead are all entered lead bullion by melting, and copper then enters matte and realizes asunder copper and lead;
3) raw coal add-on is down to 0.5 ~ 1t/h, clarified separation, after 0.5 ~ 1.5 hour, stops into coal, releases lead bullion and matte, carry out slagging again after continuous smelting two heats from plumbous mouth, flue gas through waste heat recovery, gather dust after with other SO
2relieving haperacidity is sent in flue gas mixing.
In step 1) of the present invention, the composition of described copper dross slag is leaded 60% ~ 80%, cupric 3% ~ 25%, argentiferous 100 ~ 1000g/t, and impurity.
In step 1) of the present invention, the composition of described raw coal is for containing charcoal 45% ~ 60%, sulfur-bearing 0.1% ~ 4%, ash content 15 ~ 35%, volatile matter 14 ~ 25%.
Step 2 of the present invention) in, controlling oxygen-enriched top blowing stove air quantity in described smelting process is: 2.5 ~ 3.5Nm
3/ s.
Step 2 of the present invention) in, find in described smelting process slag glue mobility bad time, carry out the mode of Slag form regulation for adding 10 ~ 15t/h lead ore concentrate.
The whole melting of the present invention, slagging, put in plumbous process and all do not stop charging, release lead bullion and matte every 5 ~ 6 hours, release lead-rich slag every 11 ~ 12 hours, stop in discharge process into coal, be incubated with diesel oil, diesel oil consumption is 0.5 ~ 1.5% of copper dross slag.
The calorific value of the present invention's raw coal used is 4500 ~ 5500kcalkg
-1, raw coal consumption is 6% ~ 8% of copper dross slag.
Below in conjunction with the process flow sheet of Fig. 1, the invention will be further described, but this explanation is not limitation of the present invention.
Embodiment 1:
To process copper dross slag raw material 300 tons, its composition is in table 2.
Table 2 copper dross slag composition (%)
1) on DCS, set copper dross slag 25t/h, raw coal 2t/h, add continuously in oxygen-enriched top blowing stove after mixing granulation and carry out melting.
2) smelt 2 hours at 750 ~ 900 DEG C of temperature, metal form in copper dross slag lead is separated with copper, smelt 3 hours again under being then warming up to 1000 ~ 1200 DEG C of temperature, the metallic lead in copper dross slag and chemical combination state lead are all entered lead bullion by melting, and copper then enters matte and realizes asunder copper and lead.
3) raw coal add-on is down to 0.8t/h, copper dross slag amount is down to 20t/h, and clarified separation, after 1 hour, stops into coal, and release lead bullion and matte from plumbous mouth, the diesel oil adding 350L/h between draining period is incubated.
4) after discharge, furnace temperature is reduced to about 750 ~ 900 DEG C, smelt 2 hours at this temperature, metal form in copper dross slag lead is separated with copper, 2.5 hours are smelted again under being then warming up to 1000 ~ 1200 DEG C of temperature, metallic lead in copper dross slag and chemical combination state lead are all entered lead bullion by melting, and copper then enters matte and realizes asunder copper and lead.In fusion process, the strict air quantity that controls is at 2.5 ~ 3.5Nm
3within the scope of/s, pay close attention to the working of a furnace, find that slag type is poor, add the lead ore concentrate adjustment slag type of 10t/h immediately.
5) raw coal add-on is down to 0.5t/h, copper dross slag amount is down to 20t/h, and clarified separation, after 0.5 hour, stops into coal, releases lead bullion and matte from plumbous mouth, then melting 0.5 hour, and release lead-rich slag from cinder notch, the diesel oil adding 400L/h between draining period is incubated.
6) high-temperature flue gas through waste heat recovery, gather dust after with other SO
2relieving haperacidity is sent in flue gas mixing.
300 tons of copper dross slags were all disposed in 12 ~ 13 hours, and technical indicator is in table 3.
Table 3 copper dross slag oxygen-enriched top blowing stove treatment technology index
Embodiment 2:
To process copper dross slag raw material 360 tons, its composition is in table 4.
Table 4 copper dross slag composition (%)
1) on DCS, set copper dross slag 30t/h, raw coal 2.5t/h, add continuously in oxygen-enriched top blowing stove after mixing granulation and carry out melting.
2) smelt 2 hours at 750 ~ 900 DEG C of temperature, metal form in copper dross slag lead is separated with copper, smelt 3 hours again under being then warming up to 1000 ~ 1200 DEG C of temperature, the metallic lead in copper dross slag and chemical combination state lead are all entered lead bullion by melting, and copper then enters matte and realizes asunder copper and lead.
3) raw coal add-on is down to 1t/h, copper dross slag amount is down to 22t/h, and clarified separation, after 1 hour, stops into coal, and release lead bullion and matte from plumbous mouth, the diesel oil adding 400L/h between draining period is incubated.
4) after discharge, furnace temperature is reduced to about 750 ~ 900 DEG C, smelt 2 hours at this temperature, metal form in copper dross slag lead is separated with copper, 3 hours are smelted again under being then warming up to 1000 ~ 1200 DEG C of temperature, metallic lead in copper dross slag and chemical combination state lead are all entered lead bullion by melting, and copper then enters matte and realizes asunder copper and lead.In fusion process, the strict air quantity that controls is at 2.5 ~ 3.5Nm
3within the scope of/s, pay close attention to the working of a furnace, find that slag type is poor, add the lead ore concentrate adjustment slag type of 15t/h immediately.
5) raw coal add-on is down to 0.6t/h, copper dross slag amount is down to 20t/h, and clarified separation, after 1 hour, stops into coal, releases lead bullion and matte from plumbous mouth, then melting 0.5 hour, and release lead-rich slag from cinder notch, the diesel oil adding 380L/h between draining period is incubated.
6) high-temperature flue gas through waste heat recovery, gather dust after with other SO
2relieving haperacidity is sent in flue gas mixing.
360 tons of copper dross slags were all disposed in 13 ~ 14 hours, and technical indicator is in table 5.
Table 5 copper dross slag oxygen-enriched top blowing stove treatment technology index
Claims (7)
1., by a method for oxygen-enriched top blowing stove process copper dross slag, it is characterized in that, comprise the following steps:
1) by copper dross slag 20 ~ 30t/h and raw coal 1.5 ~ 2.5t/h, continuous uniform after mixing granulation adds in oxygen-enriched top blowing stove and carries out melting;
2) smelt 2 ~ 3 hours at 750 ~ 900 DEG C of temperature, metal form in copper dross slag lead is separated with copper, 2.5 ~ 3.5 hours are smelted again under being then warming up to 1000 ~ 1200 DEG C of temperature, metallic lead in copper dross slag and chemical combination state lead are all entered lead bullion by melting, and copper then enters matte and realizes asunder copper and lead;
3) raw coal add-on is down to 0.5 ~ 1t/h, clarified separation, after 0.5 ~ 1.5 hour, stops into coal, releases lead bullion and matte, carry out slagging again after continuous smelting two heats from plumbous mouth, flue gas through waste heat recovery, gather dust after with other SO
2relieving haperacidity is sent in flue gas mixing.
2. the method for a kind of oxygen-enriched top blowing stove process copper dross slag according to claim 1, it is characterized in that in step 1), the composition of described copper dross slag is leaded 60% ~ 80%, cupric 3% ~ 25%, argentiferous 100 ~ 1000g/t, and impurity.
3. the method for a kind of oxygen-enriched top blowing stove process copper dross slag according to claim 1, is characterized in that in step 1), and the composition of described raw coal is for containing charcoal 45% ~ 60%, sulfur-bearing 0.1% ~ 4%, ash content 15 ~ 35%, volatile matter 14 ~ 25%.
4. the method for a kind of oxygen-enriched top blowing stove process copper dross slag according to claim 1, is characterized in that step 2) in, controlling oxygen-enriched top blowing stove air quantity in described smelting process is: 2.5 ~ 3.5Nm
3/ s.
5. the method for a kind of oxygen-enriched top blowing stove process copper dross slag according to claim 1, is characterized in that step 2) in, find in described smelting process slag glue mobility bad time, carry out the mode of Slag form regulation for adding 10 ~ 15t/h lead ore concentrate.
6. the method for a kind of oxygen-enriched top blowing stove process copper dross slag according to claim 1, it is characterized in that whole melting, slagging, put in plumbous process and all do not stop charging, release lead bullion and matte every 5 ~ 6 hours, release lead-rich slag every 11 ~ 12 hours, stop in discharge process into coal, be incubated with diesel oil, diesel oil consumption is 0.5 ~ 1.5% of copper dross slag.
7. the method for a kind of oxygen-enriched top blowing stove process copper dross slag according to any one of claim 1-6, is characterized in that the calorific value of raw coal used is 4500 ~ 5500kcalkg
-1, raw coal consumption is 6% ~ 8% of copper dross slag.
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| CN103937992A (en) * | 2014-03-25 | 2014-07-23 | 云南锡业股份有限公司 | Method for recycling copper scum during top-blown furnace smelting lead refining process |
| CN103937990A (en) * | 2014-03-25 | 2014-07-23 | 云南锡业股份有限公司 | Oxygen-rich blowing technology for producing coarse lead and matte from lead matte in top-blowing furnace |
| CN104404262A (en) * | 2014-12-25 | 2015-03-11 | 昆明冶金研究院 | Copper scum treatment technique |
| CN106916963A (en) * | 2017-01-18 | 2017-07-04 | 昆明理工大学 | A kind of copper fused bath smelting method based on the oxygen-enriched submersible burning of biomass fuel |
| CN112813278A (en) * | 2021-01-15 | 2021-05-18 | 昆明冶金研究院有限公司 | Recovery processing method of copper dross |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509081A (en) * | 2009-03-30 | 2009-08-19 | 安徽铜冠有色金属（池州）有限责任公司九华冶炼厂 | Process for directly reducing liquid high-lead slag by reduction furnace |
| CN102643996A (en) * | 2012-05-23 | 2012-08-22 | 云南驰宏锌锗股份有限公司 | Method for producing lead bullion by means of copper dross side-blown smelting |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509081A (en) * | 2009-03-30 | 2009-08-19 | 安徽铜冠有色金属（池州）有限责任公司九华冶炼厂 | Process for directly reducing liquid high-lead slag by reduction furnace |
| CN102643996A (en) * | 2012-05-23 | 2012-08-22 | 云南驰宏锌锗股份有限公司 | Method for producing lead bullion by means of copper dross side-blown smelting |
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