CN101509081A - Process for direct reduction of liquid high-lead skim with reduction furnace - Google Patents
Process for direct reduction of liquid high-lead skim with reduction furnace Download PDFInfo
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- CN101509081A CN101509081A CNA2009101164440A CN200910116444A CN101509081A CN 101509081 A CN101509081 A CN 101509081A CN A2009101164440 A CNA2009101164440 A CN A2009101164440A CN 200910116444 A CN200910116444 A CN 200910116444A CN 101509081 A CN101509081 A CN 101509081A
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Abstract
The invention discloses a process of directly reducing liquid high lead slag in reducing furnace, secondary lead-containing materials such as the liquid high lead slag, lead concentrate, scrap leads, waste accumulators and the like generated from the oxygen bottom blowing smelting furnace or zinc leaching residues are used as raw materials and are added from the top end of the reducing furnace; coal powder and natural gas used as fuel and oxygen-enriched air used as combustion improver are continuously led in from the top of the reducing furnace to carry out combustion reaction; the temperature in the reducing furnace is kept at 1000-1500 DEG C; the coal powder and natural gas can be simultaneously used as reducing agents and fall into the reaction tank at the bottom of the reducing furnace after being fully mixed with the raw materials; the lead oxides in the raw materials are reduced to crude lead and the addition of the reducing agents is subject to full reduction of the lead oxides in the raw materials. The process of the invention directly reduces the liquid high lead slag, fully utilizes the thermal energy of the high lead slag and further reduces the coke consumption and flue gas volume, thereby dramatically reducing the smoke dust rate and the smelting cost.
Description
Technical field
The present invention relates to smelt in the non-ferrous metal metallurgy industry plumbous processing method.
Background technology
At present, the technology that adopts of China's lead bullion production mainly contains traditional " sintering-blast furnace reduction " refining splicer's skill and oxygen bottom blowing---blast furnace reduction lead smelting process, QSL method, ISA and Kaldo method etc. are lead smelting process directly.Because the low concentration sulphur dioxide flue gas recovery difficult that is produced in traditional " sintering-blast furnace reduction " refining splicer skill is bigger, is subjected to the restriction of processing condition and equipment, SO
2Uncontrollable discharge and lead dust pollution can't be effectively controlled, and country prohibited and adopts this explained hereafter in 2000.In recent years, along with country is strict day by day to environmental requirement, new lead smelting process was progressively applied in China, all went into operation cloudlike refining splicers such as Ka Er many (Kaldo) the method skill that the quiet Ai Safa (ISA) that introduces of southern tunes, western mining company introduce.It is very fast that the oxygen bottom blowing-blast furnace reduction of China's independent development that more outstanding is refines plumbous novel process promotion rate.
Oxygen bottom blowing-blast furnace reduction refining splicer skill is the molten pool melting technology that China succeeds through nearly 20 years experimental study, have that reduced investment, environmental protection are good, sulphur and associated metal rate of recovery height, the various lead-containing materials of suitable treatment, transform for existing plumbous factory, having very strong competitive power, is one of environmental protection project of state key popularization.But after the hot high lead slag of oxygen bottom blowing stove output need cool off ingot bar in this technology, be sent to retailoring of blast furnace again, output secondary lead bullion and blast furnace slag, blast furnace slag carry out fuming by fuming furnace again to be handled, to reclaim the valuable metals such as plumbous zinc in the slag.Adopt blast furnace reduction high lead slag ingot bar, the heat energy of its liquid slag is wasted, and along with the lifting of coke price, refines plumbous cost and also significantly rises, therefore develop the direct reduction technique of liquid high lead slag, substitute blast furnace, make full use of the heat energy of high lead slag, and Jiao's consumption and exhaust gas volumn are further reduced, thereby reduce dust rate significantly, reduce the melting cost, make plumbous the smelting accomplish further energy-saving and emission-reduction, this should be important from now on research and development problem and a developing direction of lead smelting in China technology.
Summary of the invention
The purpose of this invention is to provide a kind of process for direct reduction of liquid high-lead skim with reduction furnace, liquid high lead slag directly reduces, and makes full use of the heat energy of high lead slag, and Jiao consumption and exhaust gas volumn further reduced, thereby reduce dust rate significantly, reduce the melting cost, reach the purpose of energy-saving and emission-reduction.
Technical scheme of the present invention is as follows:
A kind of process for direct reduction of liquid high-lead skim with reduction furnace, it is characterized in that: secondary lead-containing material such as the liquid high lead slag that produces with the oxygen bottom-blowing stove, lead ore concentrate, useless assorted lead, scrap battery or zinc leaching residue are raw material and add from the reduction furnace top, continuously with the coal dust that acts as a fuel and Sweet natural gas with feed the back as the oxygen-rich air of ignition dope from the top of reduction furnace combustion reactions take place, keep the interior temperature of reduction furnace at 1000-1500 ℃; Coal dust and Sweet natural gas be simultaneously as reductive agent, and with the raw material thorough mixing after fall into the reaction tank of reduction furnace bottom, the lead oxides in the described raw material is reduced into lead bullion, the add-on of reductive agent is as the criterion with the lead oxides in the abundant reduction raw material.
Become zinc oxide fumes after the zinc composition reaction in the described liquid high lead slag, enter dust arrester installation.
Described coal dust is to feed in the reduction furnace from the coal dust passage, and described Sweet natural gas is to feed in the reduction furnace from the Sweet natural gas passage, and described oxygen-rich air is to feed in the reduction furnace from air passageways, and three passages are respectively to be made of the space between three concentric sleeve pipes.
A kind of process for direct reduction of liquid high-lead skim with reduction furnace of the present invention is strong to the adaptability of raw material, furnace charge is prepared simple, can handle the furnace charge of various complicated ingredients, as secondary lead-containing material such as liquid high lead slag, lead ore concentrate, useless assorted lead, scrap battery and zinc leaching residue etc.; Granularity and moisture requirement for material are not harsh; It is simple to get the raw materials ready, and mixture granulation can obviously reduce the Dust Capacity that flue gas is taken away after going into stove, thereby has reduced dust rate; Make reductive agent with coal rather than with coke, reduced production cost.
In the retailoring process of a kind of reduction furnace of the present invention, in intensively stirred molten bath, liquid lead drops in the melt and can grow up rapidly, and rapid subsidence and slag phase-splitting.With regard to metallic lead, the slag in the reduction furnace can directly be discharged waste without electric dilution.Zinc in the furnace charge does not need through blast furnace fuming, and the overwhelming majority direct fuming volatilization in reduction furnace enters flue dust and reclaimed.
Because oxygen bottom-blowing---blast furnace reduction refining splicer skill (contain fuming and reclaim zinc) then needs 3～4 metallurgical furnaces just can realize, and flow process is longer.And the present invention uses compact equipment, and Production Flow Chart is short, and is simple to operate; Whole smelting process only needs two smelting furnaces to finish, and has improved the material circulation in the production process greatly; The liquid high lead slag of fused flows directly into reduction furnace, and the heat energy of high lead slag is fully used, and burnt consumption and exhaust gas volumn further reduce, thereby have reduced dust rate significantly, have reduced energy consumption, have reduced the melting cost.
The present invention has been because oxygen bottom blowing stove and reduction furnace have all used lance technology and oxygen-enriched air smelting, the smelting intensity height, and throughput is big, and has the potentiality of bigger lifting output.The mechanize of smelting technology, automatic control level height, the operating rate height, thus can improve the labour productivity of enterprise greatly.
Description of drawings
Accompanying drawing is the fundamental diagram of a kind of reduction furnace of the present invention.
Embodiment
Referring to accompanying drawing, a kind of process for direct reduction of liquid high-lead skim with reduction furnace, secondary lead-containing material such as the liquid high lead slag that produces with the oxygen bottom-blowing stove, lead ore concentrate, useless assorted lead, scrap battery or zinc leaching residue are raw material and add from the reduction furnace top, continuously with the coal dust that acts as a fuel and Sweet natural gas with feed the back as the oxygen-rich air of ignition dope from the top of reduction furnace combustion reactions take place, keep the interior temperature of reduction furnace at 1000-1500 ℃; Coal dust and Sweet natural gas are simultaneously as reductive agent, and with the reaction tank that falls into the reduction furnace bottom behind the raw material thorough mixing, lead oxides in the described raw material is reduced into lead bullion, the add-on of reductive agent is as the criterion with the lead oxides in the abundant reduction raw material, become zinc oxide fumes after the zinc composition reaction in the liquid high lead slag, enter dust arrester installation, described coal dust is to feed in the reduction furnace from the coal dust passage, described Sweet natural gas is to feed in the reduction furnace from the Sweet natural gas passage, described oxygen-rich air is to feed in the reduction furnace from air passageways, and three passages are respectively to be made of the space between three concentric sleeve pipes.
Claims (3)
1, a kind of process for direct reduction of liquid high-lead skim with reduction furnace, it is characterized in that: secondary lead-containing material such as the liquid high lead slag that produces with the oxygen bottom-blowing stove, lead ore concentrate, useless assorted lead, scrap battery or zinc leaching residue are raw material and add from the reduction furnace top, continuously with the coal dust that acts as a fuel and Sweet natural gas with feed the back as the oxygen-rich air of ignition dope from the top of reduction furnace combustion reactions take place, keep the interior temperature of reduction furnace at 1000-1500 ℃; Coal dust and Sweet natural gas be simultaneously as reductive agent, and with the raw material thorough mixing after fall into the reaction tank of reduction furnace bottom, the lead oxides in the described raw material is reduced into lead bullion, the add-on of reductive agent is as the criterion with the lead oxides in the abundant reduction raw material.
2, a kind of process for direct reduction of liquid high-lead skim with reduction furnace according to claim 1 is characterized in that: become zinc oxide fumes after the zinc composition reaction in the described liquid high lead slag, enter dust arrester installation.
3, a kind of process for direct reduction of liquid high-lead skim with reduction furnace according to claim 1, it is characterized in that: described coal dust is to feed in the reduction furnace from the coal dust passage, described Sweet natural gas is to feed in the reduction furnace from the Sweet natural gas passage, described oxygen-rich air is to feed in the reduction furnace from air passageways, and three passages are respectively to be made of the space between three concentric sleeve pipes.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009101164440A CN101509081A (en) | 2009-03-30 | 2009-03-30 | Process for direct reduction of liquid high-lead skim with reduction furnace |
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| CNA2009101164440A CN101509081A (en) | 2009-03-30 | 2009-03-30 | Process for direct reduction of liquid high-lead skim with reduction furnace |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230090A (en) * | 2010-06-01 | 2011-11-02 | 中国瑞林工程技术有限公司 | Lead-zinc integrated smelting furnace, and method for recovering lead and zinc |
| CN102321806A (en) * | 2011-09-28 | 2012-01-18 | 长沙有色冶金设计研究院有限公司 | Smelting method for processing zinc leaching residue by oxygen-enriched side-blowing furnace |
| CN103205582A (en) * | 2013-03-11 | 2013-07-17 | 中国恩菲工程技术有限公司 | Bottom blowing smelting electrothermal reduction lead and zinc smelting process |
| CN103205581A (en) * | 2013-03-11 | 2013-07-17 | 中国恩菲工程技术有限公司 | Bottom blowing smelting electrothermal reduction lead and zinc smelting device |
| CN103436705A (en) * | 2013-07-25 | 2013-12-11 | 云南驰宏锌锗股份有限公司 | Method used for processing copper dross by oxygen-enriched top-blown furnace |
| CN103667736A (en) * | 2013-12-13 | 2014-03-26 | 安阳市岷山有色金属有限责任公司 | Method for refining lead dross by employing converter |
| CN103866137A (en) * | 2014-01-16 | 2014-06-18 | 北京科技大学 | Reduction and harmless resource disposal method of heavy metal waste gypsum |
| CN104357669A (en) * | 2014-10-19 | 2015-02-18 | 耒阳市诚松有色金属再生有限公司 | Slag smelting furnace capable of discharging from multiple channels |
| CN104611573A (en) * | 2015-02-02 | 2015-05-13 | 江西新金叶实业有限公司 | Oxygen-enriched reduction furnace |
| CN104805300A (en) * | 2015-04-21 | 2015-07-29 | 云南驰宏锌锗股份有限公司 | Method for treating cold-state lead-rich slag with hot slag side-blowing reduction furnace |
| CN104831078A (en) * | 2015-04-21 | 2015-08-12 | 云南驰宏锌锗股份有限公司 | Method for processing zinc wet smelting slag by use of warm slag side blowing reducing furnace |
| CN109182779A (en) * | 2018-10-15 | 2019-01-11 | 内蒙古兴安银铅冶炼有限公司 | A kind of new liquid high lead dross reduction technique |
| CN111349792A (en) * | 2020-04-27 | 2020-06-30 | 内蒙古兴安银铅冶炼有限公司 | Novel lead smelting batching control process |
-
2009
- 2009-03-30 CN CNA2009101164440A patent/CN101509081A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230090A (en) * | 2010-06-01 | 2011-11-02 | 中国瑞林工程技术有限公司 | Lead-zinc integrated smelting furnace, and method for recovering lead and zinc |
| CN102321806A (en) * | 2011-09-28 | 2012-01-18 | 长沙有色冶金设计研究院有限公司 | Smelting method for processing zinc leaching residue by oxygen-enriched side-blowing furnace |
| CN102321806B (en) * | 2011-09-28 | 2016-03-16 | 长沙有色冶金设计研究院有限公司 | A kind of smelting process of processing zinc leaching residue by oxygen-enriched side-blowing furnace |
| CN103205582A (en) * | 2013-03-11 | 2013-07-17 | 中国恩菲工程技术有限公司 | Bottom blowing smelting electrothermal reduction lead and zinc smelting process |
| CN103205581A (en) * | 2013-03-11 | 2013-07-17 | 中国恩菲工程技术有限公司 | Bottom blowing smelting electrothermal reduction lead and zinc smelting device |
| CN103436705B (en) * | 2013-07-25 | 2015-06-10 | 云南驰宏锌锗股份有限公司 | Method used for processing copper dross by oxygen-enriched top-blown furnace |
| CN103436705A (en) * | 2013-07-25 | 2013-12-11 | 云南驰宏锌锗股份有限公司 | Method used for processing copper dross by oxygen-enriched top-blown furnace |
| CN103667736A (en) * | 2013-12-13 | 2014-03-26 | 安阳市岷山有色金属有限责任公司 | Method for refining lead dross by employing converter |
| CN103866137B (en) * | 2014-01-16 | 2015-11-18 | 北京科技大学 | The innoxious resource method of disposal of one heavy metal species waste gypsum minimizing |
| CN103866137A (en) * | 2014-01-16 | 2014-06-18 | 北京科技大学 | Reduction and harmless resource disposal method of heavy metal waste gypsum |
| CN104357669A (en) * | 2014-10-19 | 2015-02-18 | 耒阳市诚松有色金属再生有限公司 | Slag smelting furnace capable of discharging from multiple channels |
| CN104357669B (en) * | 2014-10-19 | 2016-08-17 | 耒阳市诚松有色金属再生有限公司 | A kind of slag smelting furnace of multichannel blowing |
| CN104611573A (en) * | 2015-02-02 | 2015-05-13 | 江西新金叶实业有限公司 | Oxygen-enriched reduction furnace |
| CN104805300A (en) * | 2015-04-21 | 2015-07-29 | 云南驰宏锌锗股份有限公司 | Method for treating cold-state lead-rich slag with hot slag side-blowing reduction furnace |
| CN104831078A (en) * | 2015-04-21 | 2015-08-12 | 云南驰宏锌锗股份有限公司 | Method for processing zinc wet smelting slag by use of warm slag side blowing reducing furnace |
| CN104831078B (en) * | 2015-04-21 | 2017-11-07 | 云南驰宏锌锗股份有限公司 | A kind of method that use warm sludge side-blown reduction stove handles zinc hydrometallurgy slag |
| CN109182779A (en) * | 2018-10-15 | 2019-01-11 | 内蒙古兴安银铅冶炼有限公司 | A kind of new liquid high lead dross reduction technique |
| CN111349792A (en) * | 2020-04-27 | 2020-06-30 | 内蒙古兴安银铅冶炼有限公司 | Novel lead smelting batching control process |
| CN111349792B (en) * | 2020-04-27 | 2021-01-26 | 内蒙古兴安银铅冶炼有限公司 | Novel lead smelting batching control process |
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Open date: 20090819 |