CN103436705A - 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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- CN103436705A CN103436705A CN2013103162380A CN201310316238A CN103436705A CN 103436705 A CN103436705 A CN 103436705A CN 2013103162380 A CN2013103162380 A CN 2013103162380A CN 201310316238 A CN201310316238 A CN 201310316238A CN 103436705 A CN103436705 A CN 103436705A
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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 processing copper dross slag with the oxygen-enriched top blowing stove, belong to the pyrometallurgy technical field.
Background technology
Copper dross slag is the product of fire refining of crude lead liquation decoppering, and its main component is lead and copper, general leaded 60%～80%, cupric 3%～25%, and argentiferous 100～1000g/t, also contain 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, mainly is divided into pyrogenic process and wet method.Wet method is a large amount of lead skim of output when leaching, and carrys out difficulty greatly to liquid-solid decoupled band, applies less; Pyrogenic process, according to the equipment used difference, can be divided into Blast Furnace Method, reflection oven process, electric furnace process, converter process and side-blown oven process etc.The 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, need to add coke to make reductive agent, and production cost is high; Converter process is made reductive agent, with diesel oil, is done fuel with coal, and energy consumption is higher; The side-blown oven process is used hard coal to act as a fuel and reductive agent, and energy consumption is lower, but unrealized scale is processed so far.
Summary of the invention
The objective 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 kind of method of processing copper dross slag with the oxygen-enriched top blowing stove, 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 the oxygen-enriched top blowing stove and carries out melting;
2) at 750～900 ℃ of temperature, smelt 2～3 hours, metal form lead in copper dross slag is separated with copper, then be warming up at 1000～1200 ℃ of temperature and smelt again 2.5～3.5 hours, metallic lead in copper dross slag and chemical combination state lead are all entered lead bullion by melting, and copper enters matte and realizes asunder copper and lead;
3) the raw coal add-on is down to 0.5～1t/h, clarified separation, after 0.5～1.5 hour, stops into coal, emits lead bullion and matte from plumbous mouthful, after two heats of continuous smelting, carries out slagging again, flue gas through waste heat recovery, gather dust after with other SO
2relieving haperacidity is sent in the 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, in described smelting process, control oxygen-enriched top blowing stove air quantity is: 2.5～3.5Nm
3/ s.
Step 2 of the present invention), in, while finding in described smelting process that the sticky mobility of slag is bad, 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, emit lead bullion and matte every 5～6 hours, emitted rich lead skim every 11～12 hours, stop in discharge process into coal, be incubated with diesel oil, the diesel oil consumption is copper dross slag 0.5～1.5%.
The calorific value of the present invention's raw coal used is 4500～5500kcalkg
-1, the raw coal consumption is copper dross slag 6%～8%.
The present invention compares and has advantages of with other pyrogenic attack copper dross slag technology:
1) treatment capacity is large.Production practice prove: the oxygen-enriched top blowing stove is processed copper dross slag siege ability can reach 55t/m
2more than d, and the side-blown oven process 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.
The common copper dross slag treatment process of table 1 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 to act as a fuel and reductive agent, and other several coke, electric energy or diesel oil of having used, so the present invention is more economical.
Below in conjunction with accompanying drawing and embodiment, the present invention is further explained.
The accompanying drawing explanation
Fig. 1 is the process flow sheet that the present invention adopts.
Embodiment
A kind of method of processing copper dross slag with the oxygen-enriched top blowing stove, 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 the oxygen-enriched top blowing stove and carries out melting;
2) at 750～900 ℃ of temperature, smelt 2～3 hours, metal form lead in copper dross slag is separated with copper, then be warming up at 1000～1200 ℃ of temperature and smelt again 2.5～3.5 hours, metallic lead in copper dross slag and chemical combination state lead are all entered lead bullion by melting, and copper enters matte and realizes asunder copper and lead;
3) the raw coal add-on is down to 0.5～1t/h, clarified separation, after 0.5～1.5 hour, stops into coal, emits lead bullion and matte from plumbous mouthful, after two heats of continuous smelting, carries out slagging again, flue gas through waste heat recovery, gather dust after with other SO
2relieving haperacidity is sent in the 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, in described smelting process, control oxygen-enriched top blowing stove air quantity is: 2.5～3.5Nm
3/ s.
Step 2 of the present invention), in, while finding in described smelting process that the sticky mobility of slag is bad, 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, emit lead bullion and matte every 5～6 hours, emitted rich lead skim every 11～12 hours, stop in discharge process into coal, be incubated with diesel oil, the diesel oil consumption is copper dross slag 0.5～1.5%.
The calorific value of the present invention's raw coal used is 4500～5500kcalkg
-1, the raw coal consumption is copper dross slag 6%～8%.
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:
Take that to process 300 tons of copper dross slag raw materials be example, its composition is in Table 2.
Table 2 copper dross slag composition (%)
1) set copper dross slag 25t/h, raw coal 2t/h on DCS, add continuously after mixing granulation in the oxygen-enriched top blowing stove and carry out melting.
2) at 750～900 ℃ of temperature, smelt 2 hours, metal form lead in copper dross slag is separated with copper, then be warming up at 1000～1200 ℃ of temperature and smelt 3 hours again, the metallic lead in copper dross slag and chemical combination state lead are all entered lead bullion by melting, and copper enters matte and realizes asunder copper and lead.
3) the raw coal add-on is down to 0.8t/h, the copper dross slag amount is down to 20t/h, and clarified separation, after 1 hour, stops into coal, from plumbous mouth, emits lead bullion and matte, between draining period, adds the diesel oil of 350L/h to be incubated.
4) after the discharge, furnace temperature is reduced to 750～900 ℃ of left and right, at this temperature, smelt 2 hours, metal form lead in copper dross slag is separated with copper, then be warming up at 1000～1200 ℃ of temperature and smelt again 2.5 hours, metallic lead in copper dross slag and chemical combination state lead are all entered lead bullion by melting, and copper enters matte and realizes asunder copper and lead.In fusion process, the strict air quantity of controlling is at 2.5～3.5Nm
3in/s scope, pay close attention to the working of a furnace, find that the slag type is poor, add immediately the lead ore concentrate of 10t/h to adjust the slag type.
5) the raw coal add-on is down to 0.5t/h, the copper dross slag amount is down to 20t/h, and clarified separation, after 0.5 hour, stops into coal, emits lead bullion and matte from plumbous mouthful, then melting 0.5 hour, from cinder notch, emits rich lead skim, between draining period, adds the diesel oil of 400L/h to be incubated.
6) high-temperature flue gas through waste heat recovery, gather dust after with other SO
2relieving haperacidity is sent in the flue gas mixing.
300 tons of copper dross slags all were 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:
Take that to process 360 tons of copper dross slag raw materials be example, its composition is in Table 4.
Table 4 copper dross slag composition (%)
1) set copper dross slag 30t/h, raw coal 2.5t/h on DCS, add continuously after mixing granulation in the oxygen-enriched top blowing stove and carry out melting.
2) at 750～900 ℃ of temperature, smelt 2 hours, metal form lead in copper dross slag is separated with copper, then be warming up at 1000～1200 ℃ of temperature and smelt 3 hours again, the metallic lead in copper dross slag and chemical combination state lead are all entered lead bullion by melting, and copper enters matte and realizes asunder copper and lead.
3) the raw coal add-on is down to 1t/h, the copper dross slag amount is down to 22t/h, and clarified separation, after 1 hour, stops into coal, from plumbous mouth, emits lead bullion and matte, between draining period, adds the diesel oil of 400L/h to be incubated.
4) after the discharge, furnace temperature is reduced to 750～900 ℃ of left and right, at this temperature, smelt 2 hours, metal form lead in copper dross slag is separated with copper, then be warming up at 1000～1200 ℃ of temperature and smelt again 3 hours, metallic lead in copper dross slag and chemical combination state lead are all entered lead bullion by melting, and copper enters matte and realizes asunder copper and lead.In fusion process, the strict air quantity of controlling is at 2.5～3.5Nm
3in/s scope, pay close attention to the working of a furnace, find that the slag type is poor, add immediately the lead ore concentrate of 15t/h to adjust the slag type.
5) the raw coal add-on is down to 0.6t/h, the copper dross slag amount is down to 20t/h, and clarified separation, after 1 hour, stops into coal, emits lead bullion and matte from plumbous mouthful, then melting 0.5 hour, from cinder notch, emits rich lead skim, between draining period, adds the diesel oil of 380L/h to be incubated.
6) high-temperature flue gas through waste heat recovery, gather dust after with other SO
2relieving haperacidity is sent in the flue gas mixing.
360 tons of copper dross slags all were 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. a method of processing copper dross slag with the oxygen-enriched top blowing stove, is characterized 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 the oxygen-enriched top blowing stove and carries out melting;
2) at 750～900 ℃ of temperature, smelt 2～3 hours, metal form lead in copper dross slag is separated with copper, then be warming up at 1000～1200 ℃ of temperature and smelt again 2.5～3.5 hours, metallic lead in copper dross slag and chemical combination state lead are all entered lead bullion by melting, and copper enters matte and realizes asunder copper and lead;
3) the raw coal add-on is down to 0.5～1t/h, clarified separation, after 0.5～1.5 hour, stops into coal, emits lead bullion and matte from plumbous mouthful, after two heats of continuous smelting, carries out slagging again, flue gas through waste heat recovery, gather dust after with other SO
2relieving haperacidity is sent in the flue gas mixing.
2. a kind of method of processing copper dross slag with the oxygen-enriched top blowing stove according to claim 1, is characterized in that in step 1), and the composition of described copper dross slag is leaded 60%～80%, cupric 3%～25%, argentiferous 100～1000g/t, and impurity.
3. a kind of method of processing copper dross slag with the oxygen-enriched top blowing stove 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. a kind of method of processing copper dross slag with the oxygen-enriched top blowing stove according to claim 1, is characterized in that step 2) in, in described smelting process, control oxygen-enriched top blowing stove air quantity is: 2.5～3.5Nm
3/ s.
5. a kind of method of processing copper dross slag with the oxygen-enriched top blowing stove according to claim 1, is characterized in that step 2) in, while finding in described smelting process that the sticky mobility of slag is bad, carry out the mode of Slag form regulation for adding 10～15t/h lead ore concentrate.
6. a kind of use oxygen-enriched top blowing stove according to claim 1 is processed the method for copper dross slag, it is characterized in that whole melting, slagging, put in plumbous process and all do not stop charging, emit lead bullion and matte every 5～6 hours, emitted rich lead skim every 11～12 hours, in discharge process, stop into coal, with diesel oil, be incubated, the diesel oil consumption is copper dross slag 0.5～1.5%.
7. according to a kind of described method of processing copper dross slag with the oxygen-enriched top blowing stove of claim 1-7 any one, the calorific value that it is characterized in that raw coal used is 4500～5500kcalkg
-1, the raw coal consumption is copper dross slag 6%～8%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| 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 direct reduction of liquid high-lead skim with 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 direct reduction of liquid high-lead skim with 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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