CN1693497A - Smelting method and device of molten lead oxidation slag - Google Patents
Smelting method and device of molten lead oxidation slag Download PDFInfo
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Abstract
An apparatus for smelting the oxide slags of molten lead is composed of the upper furnace body with water jacket-type or membrane-type side wall, smoke outlet, flux inlet and oxide slag inlet, the lower furnace body with water jacket-type wall, nozzle inlet and slag discharging outlet, and the furnace bottom with refractory liner and lead outlet. Its method includes reducing step and smoking step.
Description
(1) technical field
The present invention relates to a kind of smelting process of non-ferrous metal, the smelting process of particularly a kind of molten lead oxidation slag (high lead slag) and the device that is used to realize this smelting method.
(2) background technology
The plumbous technology of existing refining adopts oxygen bottom-blowing-blast furnace reduction lead smelting process, though solved the SO of the plumbous smelting industry of long-term puzzlement preferably
2The pollution problem of flue gas and lead dust, send blast furnace reduction but the molten lead oxidation slag (high lead slag) of oxygen bottom-blowing process output need condense again behind the ingot bar, the heat content of high-temperature fusion lead oxidation slag (account for lead oxidation slag reduce required heat content about 15%) can't utilize; Blast furnace reduction need consume expensive block metallurgical coke simultaneously, and in the reduction process, the coke incomplete combustion about 30% is arranged, and has both wasted the energy, has increased production cost again.In addition, blast furnace slag also need send fuming furnace further to handle, and production unit is many, and production link is many, invest bigger, the operating environment heavy contamination.
(3) summary of the invention
The purpose of this invention is to provide a kind of molten lead oxidation slag smelting process and device, solve the utilization of high-temperature molten slag heat content, the problem of further improve operating environment, further saving energy and reduce the cost; The method that also provides in the molten lead oxidation slag fuming volatilization process of valuable metals such as plumbous reduction process and zinc germanium indium to carry out in same stove simultaneously replaces original blast furnace and fuming furnace, cancellation casting slag, thus reduce production link, save construction investment.
Technical scheme of the present invention: this molten lead oxidation slag smelting process, it is characterized in that: adopt vertical side-blowing furnace, body of heater inside is the molten bath, and smoke outlet is established at the upper furnace body top, and sidewall is established flux charging opening and lead oxidation slag charging opening, lower furnace body one sidewall is provided with nozzle entrance, another sidewall is provided with slag-drip opening, and the bottom of lower furnace body is communicated with the bottom body of heater, and body of heater inside in bottom is invert the bottom of a pan shape, the bottom inner lining refractory is opened a siphon lead taphole on the sidewall;
Adopt the smelting process of above-mentioned side-blown converter to comprise following two stages:
Fs is a reduction process: lead oxidation slag and the flux charging opening from the side-blown converter upper furnace body is added, carry out retailoring, the intravital bath temperature of stove is 1050-1250 ℃; Air and reductive agent are sprayed into the molten bath through the nozzle entrance of lower furnace body, and the oxygen concentration that is blown into air is 21%-40%; Lead oxidation slag is retailoring in body of heater, and output lead bullion, lead bullion are emitted and ingot casting by the siphon port of bottom body of heater, and leaded flue dust drains into waste heat boiler and dust-precipitator is collected in proper order from the smoke outlet of upper furnace body;
Subordinate phase is a fuming process: proceed subordinate phase fuming blowing through the slag behind the first stage of reduction in body of heater, bath temperature is 1150-1300 ℃ in the body of heater; Air and reductive agent spray into the molten bath by nozzle entrance from the furnace side, and the oxygen concentration that is blown into air is 21%-40%; Make zinc, germanium, indium, silver and remaining plumbous valuable metal produce the fuming volatilization, recrement is discharged from the slag-drip opening of lower furnace body.
This molten lead oxidation slag smelting process is characterized in that:
Recrement in the above-mentioned fs is discharged from the slag-drip opening of this body of heater, and enters and carry out the fuming blowing in second side-blown converter, and bath temperature is 1150-1300 ℃; Air and reductive agent spray into the molten bath by nozzle entrance from the furnace side, and the oxygen concentration that is blown into air is 23%-40%; Slag is after subordinate phase fuming blowing, and output contains the flue gas and the waste of oxidation zinc gray; The oxidation zinc gray is collected at waste heat boiler and dust-precipitator, discharges after the waste shrend.
In the above-mentioned first stage of reduction process, side-blown converter bath temperature scope is 1150-1200 ℃.
Above-mentioned air is an oxygen-rich air.
Above-mentioned reductive agent is fine coal, Sweet natural gas, coal gas or liquefied petroleum gas (LPG).
Said nozzle inlet side connects wind-supplying mouth.
This molten lead oxidation slag smelting device, body of heater is vertical structure, and body of heater inside is the molten bath, and the furnace wall is a jacket structure for water, it is characterized in that: smoke outlet is established at the upper furnace body top, sidewall is established flux charging opening and lead oxidation slag charging opening, and lower furnace body one sidewall is provided with nozzle entrance, and another sidewall is provided with slag-drip opening, the bottom of lower furnace body is communicated with the bottom body of heater, body of heater inside, bottom is invert the bottom of a pan shape, and the bottom inner lining refractory is opened a siphon lead taphole on the sidewall.
Said apparatus is by the series connection of two molten lead oxidation slag smelting devices or by a molten lead oxidation slag smelting device, the logical fuming furnace series connection of a Daepori, the latter by chute with the slag-drip opening of molten lead oxidation slag smelting device with the warm sludge opening for feed of common fuming furnace be communicated with.
Above-mentioned upper furnace body sidewall is jacket structure for water or membrane wall structure.
The cross section of above-mentioned body of heater is rectangle or circle.
The present invention has following unusual effect:
(1) energy consumption is low
The direct metallurgy molten lead oxidation slag of the present invention (high lead slag) makes full use of the heat content of molten lead oxidation slag (high lead slag), and adopts oxygen-rich air retailoring, can save the energy than blast furnace reduction.
(2) production cost is low
The reduction of this smelting method molten lead oxidation slag (high lead slag) is adopted fine coal (or Sweet natural gas, coal gas, liquefied petroleum gas (LPG)) to replace the used metallurgical coke of blast furnace reduction and is made reductive agent (fuel), and adopts the oxygen-rich air melting, can save smelting cost.
(3) good operational environment
This smelting method molten lead oxidation slag (high lead slag) directly reduces and fuming in the approaching side blown converter, has cancelled the operation of casting slag and handling cinder ladle, and operating environment is further improved.
(4) construction investment is economized
This smelting method can be carried out the fuming volatilization of valuable metals such as reduction plumbous in the molten lead oxidation slag (high lead slag) and zinc germanium indium in same stove, replace blast furnace and fuming furnace with a side-blown converter, and cancelled casting slag machine, both reduce production unit, production link, can save construction investment greatly again.
(4) description of drawings
Fig. 1 is the front view of the embodiment of the invention one;
Fig. 2 is the side-view of Fig. 1.
Fig. 3 is the structural representation of the embodiment of the invention two.
Fig. 4 is a process flow sheet of the present invention.
Among the figure: 1-upper furnace body, 2-lower furnace body, 3-bottom body of heater, 4-molten bath, 5-water jacket, 6-lead oxidation slag charging opening, 7-flux charging opening, 8-nozzle entrance, 9-smoke outlet, 10-slag-drip opening, 11-invert pan bottom shape structure, 12-wind-supplying mouth, 13-siphon lead taphole, 14-flange, 15-fuming furnace, 16-chute, 17-warm sludge opening for feed.
(5) embodiment
Embodiment one adopts the concrete grammar of the smelting high lead slag of single side-blown converter to comprise following technological process referring to Fig. 1,2:
The body of heater that adopts is a vertical side-blowing furnace, body of heater inside is molten bath 4, the furnace wall is water jacket 5 or membrane wall structure, smoke outlet 9 is established at the top of upper furnace body 1, and the sidewall of upper furnace body 1 is respectively established a lead oxidation slag charging opening 6, flux charging opening 7, and lower furnace body 2 sidewalls are provided with nozzle entrance 8 and slag-drip opening 10, the bottom of lower furnace body is communicated with bottom body of heater 3, body of heater inside, bottom is invert pan bottom shape structure 11, and the bottom inner lining refractory is opened a siphon lead taphole 13 on the sidewall.
The smelting process that adopts above-mentioned side-blown converter is referring to Fig. 4, and it comprises following two stages:
Fs is a reduction process: lead oxidation slag and the flux charging opening from upper furnace body is added, carry out retailoring, reductive agent is fine coal, Sweet natural gas, coal gas or liquefied petroleum gas (LPG).The bath temperature of body of heater is 1050-1250 ℃, and preferred temperature range is 1150-1200 ℃.Air and reductive agent are sprayed into the molten bath through the nozzle entrance and the side-blown mouth of lower furnace body, and the oxygen concentration that is blown into air is 21%-40%, and preferred oxygen concentration is 25%-32%.For increase is blown into effect, can connect wind-supplying mouth 12 at the nozzle entrance side, be convenient to feed secondary air.
The retailoring in body of heater of part lead oxidation slag, output lead bullion, lead bullion are emitted and ingot casting by the siphon port of bottom body of heater, and leaded flue dust drains into waste heat boiler and dust-precipitator is collected in proper order from the smoke outlet of upper furnace body;
The subordinate phase fuming process: the slag behind the first stage of reduction is proceeded subordinate phase fuming blowing in body of heater, bath temperature is 1150-1300 ℃; Air and reductive agent spray into the molten bath by nozzle entrance from the furnace side, and the oxygen concentration that is blown into air is 23%-40%; Make zinc, germanium, indium, silver and remaining plumbous valuable metal produce the fuming volatilization, recrement is discharged from the slag-drip opening of lower furnace body.
Embodiment two is referring to Fig. 3: by a molten lead oxidation slag smelting device, the logical fuming furnace series connection of a Daepori, with chute 16 with the slag-drip opening 10 of molten lead oxidation slag smelting device with the warm sludge opening for feed 17 of common fuming furnace 15 be communicated with.
Referring to Fig. 4, its molten lead oxidation slag smelting process:
In side-blown converter, the reduction process of fs is as embodiment one.The recrement of output is discharged from the slag-drip opening of this body of heater in fs, and enters and carry out the fuming blowing in second side-blown converter, and bath temperature is 1150-1300 ℃; Air and reductive agent spray into the molten bath by nozzle entrance from the furnace side, and the oxygen concentration that is blown into air is 23%-40%; Slag is after subordinate phase fuming blowing, and output contains the flue gas and the waste of oxidation zinc gray; The oxidation zinc gray is collected at waste heat boiler and dust-precipitator, discharges after the waste shrend.
This molten lead oxidation slag smelting device of the present invention, body of heater is vertical structure, is connected as one by flange 14 between upper furnace body 1, lower furnace body 2 and the bottom body of heater 3, the cross section of body of heater is rectangle or circle.Body of heater inside is molten bath 4, and there is water jacket 5 furnace wall, and smoke outlet 9 is established at the upper furnace body top, sidewall is established flux charging opening 7 and lead oxidation slag charging opening 6, and lower furnace body one sidewall is provided with nozzle entrance 8, and another sidewall is provided with slag-drip opening 10, for increase is blown into effect, said nozzle inlet side connects wind-supplying mouth 12.The bottom of lower furnace body is communicated with bottom body of heater 3, and body of heater inside in bottom is invert pan bottom shape structure 11, and the bottom inner lining refractory is opened a siphon lead taphole 13 on the sidewall.
Said apparatus can be by two molten lead oxidation slag smelting device series connection.Also can be by the logical fuming furnace series connection of a molten lead oxidation slag smelting device, a Daepori, can with chute 16 with the slag-drip opening 10 of molten lead oxidation slag smelting device with the warm sludge opening for feed 17 of common fuming furnace 15 be communicated with.
Another specific embodiment: the lead oxidation slag that smelt (high lead slag) major ingredient is: contain Pb35-55%, Fe/SiO2:0.8-1.4/1 (weight ratio), CaO/SiO2:0.2-0.8/1 (weight ratio).Molten lead oxidation slag (high lead slag) is as follows by the main component of total mass per-cent: pb 45%, Zn 6.63%, Cu 0.43%, SiO
27.54%, Fe9%, CaO 3.01%, wherein metals such as pb, Zn, Cu, Fe all exist with oxide form.
This high lead slag and flux are added side-blown converter respectively, and the fs is carried out retailoring, 1150 ℃ of bath temperatures.Fine coal and oxygen-rich air spray in the stove from the furnace side, and oxygen-rich air contains O
232% (total volume percent), output lead bullion, slag and contain the high-temperature flue gas of lead dust, wherein slag is as follows by the main component of total mass per-cent: pb4%, Zn 11.4%, Cu 0.15%, SiO
214.76%, Fe 16.14%, CaO 9.57%.This slag carries out subordinate phase fuming blowing, 1250 ℃ of bath temperatures in side-blown converter.Fine coal and oxygen-rich air spray in the stove from the furnace side, and oxygen-rich air contains O
228% (total volume percent), output contain the high-temperature flue gas and the slag of oxidation zinc gray, and wherein slag is as follows by the main component of total mass per-cent: pb 0.24%, Zn 1.85%, Cu 0.05%, SiO
216.72%, Fe 24.81%, CaO 5.89%.
Claims (10)
1. molten lead oxidation slag smelting process, it is characterized in that: adopt vertical side-blowing furnace, body of heater inside is the molten bath, and smoke outlet is established at the upper furnace body top, and sidewall is established flux charging opening and lead oxidation slag charging opening, lower furnace body one sidewall is provided with nozzle entrance, another sidewall is provided with slag-drip opening, and the bottom of lower furnace body is communicated with the bottom body of heater, and body of heater inside in bottom is invert the bottom of a pan shape, the bottom inner lining refractory is opened a siphon lead taphole on the sidewall;
Adopt the smelting process of above-mentioned side-blown converter to comprise following two stages:
Fs is a reduction process: lead oxidation slag and the flux charging opening from the side-blown converter upper furnace body is added, carry out retailoring, the intravital bath temperature of stove is 1050-1250 ℃; Air and reductive agent are sprayed into the molten bath through the nozzle entrance of lower furnace body, and the oxygen concentration that is blown into air is 21%-40%; Lead oxidation slag is retailoring in body of heater, and output lead bullion, lead bullion are emitted and ingot casting by the siphon port of bottom body of heater, and leaded flue dust drains into waste heat boiler and dust-precipitator is collected in proper order from the smoke outlet of upper furnace body;
Subordinate phase is a fuming process: proceed subordinate phase fuming blowing through the slag behind the first stage of reduction in body of heater, bath temperature is 1150-1300 ℃ in the body of heater; Air and reductive agent spray into the molten bath by nozzle entrance from the furnace side, and the oxygen concentration that is blown into air is 21%-40%; Make zinc, germanium, indium, silver and remaining plumbous valuable metal produce the fuming volatilization, recrement is discharged from the slag-drip opening of lower furnace body.
2. molten lead oxidation slag smelting process according to claim 1 is characterized in that:
Recrement in the above-mentioned fs is discharged from the slag-drip opening of this body of heater, and enters and carry out the fuming blowing in second side-blown converter, and bath temperature is 1150-1300 ℃; Air and reductive agent spray into the molten bath by nozzle entrance from the furnace side, and the oxygen concentration that is blown into air is 23%-40%; Slag is after subordinate phase fuming blowing, and output contains the flue gas and the waste of oxidation zinc gray; The oxidation zinc gray is collected at waste heat boiler and dust-precipitator, discharges after the waste shrend.
3. molten lead oxidation slag smelting process according to claim 1 and 2 is characterized in that, in the described first stage of reduction process, side-blown converter bath temperature scope is 1150-1200 ℃.
4. molten lead oxidation slag smelting process according to claim 1 and 2 is characterized in that described air is an oxygen-rich air.
5. molten lead oxidation slag smelting process according to claim 1 and 2 is characterized in that, above-mentioned reductive agent is fine coal, Sweet natural gas, coal gas or liquefied petroleum gas (LPG).
6. molten lead oxidation slag smelting process according to claim 1 and 2 is characterized in that, said nozzle inlet side connects wind-supplying mouth.
7. molten lead oxidation slag smelting device, body of heater is vertical structure, and body of heater inside is the molten bath, and the furnace wall is a jacket structure for water, it is characterized in that: smoke outlet is established at the upper furnace body top, sidewall is established flux charging opening and lead oxidation slag charging opening, and lower furnace body one sidewall is provided with nozzle entrance, and another sidewall is provided with slag-drip opening, the bottom of lower furnace body is communicated with the bottom body of heater, body of heater inside, bottom is invert the bottom of a pan shape, and the bottom inner lining refractory is opened a siphon lead taphole on the sidewall.
8. molten lead oxidation slag smelting device according to claim 7, it is characterized in that, said apparatus is by the series connection of two molten lead oxidation slag smelting devices or by a molten lead oxidation slag smelting device, the logical fuming furnace series connection of a Daepori, the latter by chute with the slag-drip opening of molten lead oxidation slag smelting device with the warm sludge opening for feed of common fuming furnace be communicated with.
9. according to claim 7 or 8 described molten lead oxidation slag smelting devices, it is characterized in that above-mentioned upper furnace body sidewall is jacket structure for water or membrane wall structure.
10. according to claim 7 or 8 described molten lead oxidation slag smelting devices, it is characterized in that the cross section of above-mentioned body of heater is rectangle or circle.
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| CN111850308B (en) * | 2020-07-22 | 2021-04-16 | 湖北大江环保科技股份有限公司 | Method for treating copper smoke dust by using oxygen-enriched side-blown reduction smelting furnace |
| CN113430388A (en) * | 2021-06-18 | 2021-09-24 | 中国恩菲工程技术有限公司 | Short-flow reduction fuming device and method for liquid lead slag, lead smelting system and method |
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