CN101096271A - Sulfide plumbum concentrate continuous oxidation-reduction smelting and slag fuming exhaust amine absorbing acid-production technique - Google Patents
Sulfide plumbum concentrate continuous oxidation-reduction smelting and slag fuming exhaust amine absorbing acid-production technique Download PDFInfo
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- CN101096271A CN101096271A CNA2007100659095A CN200710065909A CN101096271A CN 101096271 A CN101096271 A CN 101096271A CN A2007100659095 A CNA2007100659095 A CN A2007100659095A CN 200710065909 A CN200710065909 A CN 200710065909A CN 101096271 A CN101096271 A CN 101096271A
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Abstract
The invention discloses an acid process which includes a continuous reducing smelting and oxidization smelting for the lead sulfide concentrate and a slag smoldering and tail gas amine absorption. The invention comprises the following steps: smelting the lead sulfide concentrate in order to oxygenate continuously in the same metallurgical furnace; smelting in order to reduction; volatilizing and smoldering; preparing hydric sulphate after absorbing SO2. The invention is characterized by the following: absorbing the smoke gas with 0.008%-15% SO2 which is produced in every step with organic amine with the thermal instability; depositing SO2 continuously and steadily by heating organic amine with SO2 and preparing hydric sulphate continuously and steadily. The process produces the good quality hydric sulphate, which uses SO2 effectively.
Description
Technical field
The present invention relates to nonferrous metallurgy process technology, be specifically related to the pyrometallurgical smelting and the flue gas acid preparing Technology of concentrate of lead sulfide ore.
Background technology
Plumbous smelting process can be summarized as traditional lead smelting process and direct lead smelting process two big classes.The tradition lead smelting process is a sinter machine---blast-furnace method; Directly lead smelting process is promptly cancelled the concentrate of lead sulfide ore sintering process, and the production of sperm ore deposit is directly into the method for stove melting.Traditional for many years method is plumbous main production method, but along with the mankind to the improving constantly of environmental protection, energy-conservation understanding and requirement, show outstanding the shortcoming day of traditional lead smelting process, a lot of in the world plumbous smelteries progressively adopt direct lead smelting process to substitute traditional lead smelting process.Directly lead smelting process can reduce two kinds of primary reformer method and two sections oven processes.The primary reformer method as lucky husband's Saite method, Australia Si Maitefa, QSL method, kaldo process, Wa Niukefufa etc., is oxidizing semlting and two processes of retailoring of finishing lead smelt in a stove.Two sections oven processes as Ai Safa, mountain, mouth of a river method etc., are to finish lead bullion production oxidizing semlting and two processes of retailoring in two stoves.
At present, the most of plumbous manufacturing enterprises that smelt of China still adopt traditional sinter machine---and blast-furnace method is produced lead bullion, and wherein sophistication transformation is just being set about by part enterprise; There is produced in small quantities enterprise to adopt Ai Safa, mountain, mouth of a river method and QSL method to produce lead bullion.
There is the difficult shortcoming that continues acceptance of people in the tradition lead smelting process: the exhaust gas volumn that sinter machine, blast furnace produce is big, and SO2 concentration of flue gas is lower, generally is lower than 4%, is difficult to administer economically and utilize, so that can cause severe contamination to environment; A large amount of oxidation reaction heats are underutilized in the sintering process, and agglomerate cooling back is at the blast furnace smelting metallurgical coke of mass consumption costliness again, energy consumption height; Technical process is long, equipment is many; Material cycling is many; Agglomerate returns the flue gas that fragmentation, compound sintering, blast furnacing produce leaded dust, contain lead steam and SO2, and low vacancy pollution is serious, and operating environment is poor, work and the industrial hygiene condition is poor, to the worker is healthy bigger harm arranged.At present, China has banned use of the treatment facility of sinter machine as newly-built factory concentrate of lead sulfide ore, and original traditional lead smelting process is also required and must undergo technological transformation by time limit.
Mountain, the mouth of a river (SKS) method, Ai Safa refining lead belong to typical two sections lead smelting process, and its lead smelt process using Chinese mugwort Sa stove (or SKS stove)---blast furnace---fuming furnace process integration is finished.Two sections lead smelting process are as the oxidizing semlting stove of concentrate of lead sulfide ore, in the melting section, can produce 30～70% the lead bullion of going into the stove total lead, and exhaust gas volumn is less, SO
2Concentration height, flue gas are easy to administer, and the sulphur more than 90% obtains recycling, and environmental pollution and work industrial hygiene condition have bigger improvement than traditional method.The slag (rich lead skim) that smelting furnace produces is regularly emitted, after needing cooling, being crushed to certain particle size, again at retailoring of blast furnace, with addition of the metallurgical coke of costliness; Utilization of Heat of Reaction is insufficient, and energy consumption is still higher.Because the flue gas that the blast furnace smelting section produces contains SO
2Lower, SO
2Do not reach the requirement of the minimum concentration 4% of present relieving haperacidity, can't be used to produce sulfuric acid, could discharge after must administering.The slag of blast furnace output is delivered to blast furnace fuming, further reclaims valuable metals such as zinc.The fuming furnace flue gas also contains low concentration SO
2, can not relieving haperacidity, could discharge after must administering.Australia Si Maitefa, lucky husband's Saite method, the many oven processes of Ka Er, QSL method, plumbous oxidizing semlting and two processes of retailoring in same metallurgical furnace, finished that belong to of Wa Niukefufa refining.But the slag of these metallurgical furnace outputs need be delivered to blast furnace fuming, further reclaims valuable metals such as zinc.The fuming furnace flue gas contains low concentration SO
2, could discharge after must administering.That is to say that whole metallurgical process need be finished at least in two metallurgical furnaces.And, low concentration SO
2Because the low excessively requirement that does not reach the minimum concentration 4% of present relieving haperacidity of concentration often all is not fully utilized, and also must administer back tail gas and could discharge.
Generally speaking, the SO that in smelting, produces of prior art
2The fluctuation of concentration of flue gas is very big, is unfavorable for realizing continuously, relieving haperacidity stably; And work as SO
2Concentration is lower than at 4% o'clock and just no longer is used to relieving haperacidity, needs expensive fund and administer tail gas, and resource is wasted.
Summary of the invention
The purpose of this invention is to provide a kind of three smelting processes of the continuous oxidizing semlting of concentrate of lead sulfide ore---retailoring---fuming volatilization of in same metallurgical furnace, finishing, for the very big SO of fluctuation of concentration that this exclusive smelting process produced
2Flue gas carries out evenly, continuously, relieving haperacidity stably, the sulfuric acid quality of producing is good, SO
2The utilization ratio height.
The scheme that technical problem adopted of solution invention is: concentrate of lead sulfide ore is realized oxidizing semlting---retailoring---fuming volatilization continuously in same metallurgical furnace, to the SO of each stage generation
2The flue gas that concentration fluctuates between 0.008%～15% absorbs with thermally labile organic amine liquid, is rich in SO by heating
2Organic amine liquid, parse SO continuously and stably
2, and then produce sulfuric acid continuously and stably.
Technical scheme of the present invention also comprises: organic amine liquid adopts under the temperature be lower than 380 ℃ the not organic amine of decomposition type, is the SO in the absorption flue gas under 5～7,10 ℃～40 ℃ the Working environment in pH value
2, make the tail gas after the absorption contain SO
2Concentration is lower than 50mg/Nm
3Absorbed SO
2Machine amine liquid again 100 ℃～120 ℃ down heating, the stable SO that emits
2Be used for continous-stable relieving haperacidity.
The invention has the beneficial effects as follows: finish oxidizing semlting, retailoring and three metallurgical processes of slag fuming of concentrate of lead sulfide ore with a metallurgical furnace, can make SO
2Flue gas concentration fluctuation is very big, is unfavorable for realizing continuously, relieving haperacidity stably.Utilized a kind of heat-labile organic amine liquid can absorb SO but present method is ingenious
2Fully parse SO with being heated
2Characteristic, thereby can realize SO
2The metallurgical gas relieving haperacidity continuously and stably that fluctuation of concentration is big has improved SO greatly
2Utilization ratio, it is reached greater than 95%, and has reduced operating cost effectively, improved environmental protection condition.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Embodiment 1
Concentrate of lead sulfide ore is joined melting in the Australia Si Maite stove of a submerged lance top-blown melting, carry out oxidizing semlting---retailoring---fuming volatilization continuously in same Australia Si Maite stove, the slag emission that just can abandon at last smelting furnace.Three exhaust gas volumn and flue gas SO that smelting process produces
2Fluctuation of concentration is very big, wherein in per 8 hours of oxidizing semlting stage 4 hours flue gas SO is arranged
2Concentration is 12%, and 1.5 hours flue gas SO were arranged in per 8 hours of retailoring stage
2Concentration is 4%, and slag fuming has 2 hours flue gas SO in per 8 hours of the stage of volatilization
2Concentration is 0.02%, and emitting has 0.5 hour flue gas SO in per 8 hours of slag stage
2Concentration is 0.02%.Such flue gas SO
2Fluctuation of concentration is too big, discharges from a mouth, can't be directly in order to produce sulfuric acid continuously.(Canadian import) the organic amine liquid that adopts the present invention to select absorbs SO wherein
2, its decomposition temperature is 380 ℃, and the working temperature when absorbing flue gas is about 15 ℃, and the pH value of Working environment is 5; To be rich in SO then
2Amine liquid be collected in the holder, be used in 100 ℃ of following steam evenly continuously heating be rich in SO
2Organic amine liquid (steam is not directly sneaked in the organic amine liquid), make the SO of absorption
2Parse equably continuously, produce sulfuric acid, discharged SO
2After amine liquid return the SO that is used further to absorb in the flue gas
2Final tail gas after the processing contains SO
2Concentration is lower than 50mg/Nm
3, reaching the environment protection emission requirement, can directly discharge.
Embodiment 2
Concentrate of lead sulfide ore is joined melting in the Australia Si Maite stove of a submerged lance top-blown melting, carry out oxidizing semlting---retailoring---fuming volatilization continuously in same Australia Si Maite stove, the slag emission that just can abandon at last smelting furnace.Three exhaust gas volumn and flue gas SO that smelting process produces
2Fluctuation of concentration is very big, wherein in per 8 hours of oxidizing semlting stage 4 hours flue gas SO is arranged
2Concentration is 15%, and 1.5 hours flue gas SO were arranged in per 8 hours of retailoring stage
2Concentration is 1%, and slag fuming has 2 hours flue gas SO in per 8 hours of the stage of volatilization
2Concentration is 0.5%, and emitting has 0.5 hour flue gas SO in per 8 hours of slag stage
2Concentration is 0.008%.Such flue gas SO
2Fluctuation of concentration is too big, discharges from a mouth, can't be directly in order to produce sulfuric acid continuously.(Canadian import) the organic amine liquid that adopts the present invention to select absorbs SO wherein
2, its decomposition temperature is 380 ℃, and the working temperature when absorbing flue gas is about 35 ℃, and the pH value of Working environment is 7; To be rich in SO then
2Amine liquid be collected in the holder, be used in 120 ℃ of following steam evenly continuously heating be rich in SO
2Organic amine liquid (steam is not directly sneaked in the organic amine liquid), make the SO of absorption
2Parse equably continuously, produce sulfuric acid, discharged SO
2After amine liquid return the SO that is used further to absorb in the flue gas
2Final tail gas after the processing contains SO
2Concentration is lower than 50mg/Nm
3, reaching the environment protection emission requirement, can directly discharge.
Embodiment 3
Concentrate of lead sulfide ore is joined melting in the Australia Si Maite stove of a submerged lance top-blown melting, carry out oxidizing semlting---retailoring---fuming volatilization continuously in same Australia Si Maite stove, the slag emission that just can abandon at last smelting furnace.Three exhaust gas volumn and flue gas SO that smelting process produces
2Fluctuation of concentration is very big, wherein in per 8 hours of oxidizing semlting stage 3.5 hours flue gas SO is arranged
2Concentration is 14%, and 2.5 hours flue gas SO were arranged in per 8 hours of retailoring stage
2Concentration is 3%, and slag fuming has 1.5 hours flue gas SO in per 8 hours of the stage of volatilization
2Concentration is 0.35%, and emitting has 0.5 hour flue gas SO in per 8 hours of slag stage
2Concentration is 0.01%.Such flue gas SO
2Fluctuation of concentration is too big, discharges from a mouth, can't be directly in order to produce sulfuric acid continuously.(Canadian import) the organic amine liquid that adopts the present invention to select absorbs SO wherein
2, its decomposition temperature is 380 ℃, and the working temperature when absorbing flue gas is 30 ℃, and the pH value of Working environment is 6; To be rich in SO then
2Amine liquid be collected in the holder, be used in 110 ℃ of following steam evenly continuously heating be rich in SO
2Organic amine liquid (steam is not directly sneaked in the organic amine liquid), make the SO of absorption
2Parse equably continuously, produce sulfuric acid, discharged SO
2After amine liquid return the SO that is used further to absorb in the flue gas
2Final tail gas after the processing contains SO
2Concentration is lower than 50mg/Nm
3, reaching the environment protection emission requirement, can directly discharge.
Claims (2)
1, a kind of concentrate of lead sulfide ore continuous oxidation-reduction smelting and slag fuming exhaust amine absorb acid-making process, it is characterized in that: concentrate of lead sulfide ore is realized oxidizing semlting---retailoring---fuming volatilization continuously in same metallurgical furnace, to the SO of each stage generation
2The flue gas that concentration fluctuates between 0.008%～15% absorbs with thermally labile organic amine liquid, is rich in SO by heating
2Organic amine liquid, parse SO continuously and stably
2, and then produce sulfuric acid continuously and stably.
2, absorb acid-making process by described concentrate of lead sulfide ore continuous oxidation-reduction smelting of claim 1 and slag fuming exhaust amine, it is characterized in that: organic amine liquid adopts the organic amine of decomposition type more than 380 ℃, is the SO in the absorption flue gas under 5～7,10 ℃～40 ℃ the Working environment in pH value
2, make the tail gas after the absorption contain SO
2Concentration is lower than 50mg/Nm
3Absorbed SO
2Machine amine liquid again 100 ℃～120 ℃ down heating, the stable SO that emits
2Be used for relieving haperacidity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100659095A CN101096271A (en) | 2007-05-25 | 2007-05-25 | Sulfide plumbum concentrate continuous oxidation-reduction smelting and slag fuming exhaust amine absorbing acid-production technique |
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|---|---|---|---|
| CNA2007100659095A CN101096271A (en) | 2007-05-25 | 2007-05-25 | Sulfide plumbum concentrate continuous oxidation-reduction smelting and slag fuming exhaust amine absorbing acid-production technique |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102268557A (en) * | 2011-08-02 | 2011-12-07 | 云南锡业集团（控股）有限责任公司 | One-step oxidizing smelting, retailoring and slag fuming volatilization method for lead sulphide concentrate |
| CN106086459A (en) * | 2016-08-30 | 2016-11-09 | 安阳市岷山有色金属有限责任公司 | A kind of oxygen bottom-blowing direct-reduction lead smelting process |
| CN106672904A (en) * | 2017-01-23 | 2017-05-17 | 科莱环境工程（北京）有限公司 | Method for comprehensively treating sulfur-containing flue gas and solid waste abraum salt |
-
2007
- 2007-05-25 CN CNA2007100659095A patent/CN101096271A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102268557A (en) * | 2011-08-02 | 2011-12-07 | 云南锡业集团（控股）有限责任公司 | One-step oxidizing smelting, retailoring and slag fuming volatilization method for lead sulphide concentrate |
| CN106086459A (en) * | 2016-08-30 | 2016-11-09 | 安阳市岷山有色金属有限责任公司 | A kind of oxygen bottom-blowing direct-reduction lead smelting process |
| CN106672904A (en) * | 2017-01-23 | 2017-05-17 | 科莱环境工程（北京）有限公司 | Method for comprehensively treating sulfur-containing flue gas and solid waste abraum salt |
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Open date: 20080102 |