CN1594614A - Direct reduction process for liquid high lead skim of oxygen bottom blowing furnace and special reducing furnace - Google Patents
Direct reduction process for liquid high lead skim of oxygen bottom blowing furnace and special reducing furnace Download PDFInfo
- Publication number
- CN1594614A CN1594614A CN 200410010377 CN200410010377A CN1594614A CN 1594614 A CN1594614 A CN 1594614A CN 200410010377 CN200410010377 CN 200410010377 CN 200410010377 A CN200410010377 A CN 200410010377A CN 1594614 A CN1594614 A CN 1594614A
- Authority
- CN
- China
- Prior art keywords
- furnace
- slag
- lead
- oxygen
- reduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
This invention involves in high lead slag melt direct reduction method in oxygen bottom blowing furnace and special-purpose reduction furnace. Liquid state high lead slag melt which is oxidatively melted by bottom blowing furnace is poured directly into the reduction furnace, simultaneously pulverized coal is added to the reduction furnace, and oxygen is supplied to reduction furnace through spray gun of bottom side. The furnace top has a pulverized coal mouth and a cooling water jacket on which high lead slag smelt mouth is set. The furnace melting pool has a slag-discharge mouth, at which outside the furnace there is a slag controlling pool. There is a lead siphon channel for discharging deposited lead liquid. The invention has advantages of low apparatus investment, low labor intensity, good labor environment, rapid reduction , easy operation etc.
Description
Technical Field
The invention relates to a method for directly reducing high lead slag melt in an oxygen bottom-blowing furnace in a liquid state and a special reducing furnace.
Background
At present, along with the popularization and application of the more advanced domestic oxygen bottom blowing oxidation-blast furnace reduction lead smelting technology to replace the traditional sintering-blast furnace reduction lead smelting technology, the production environment is obviously improved, but the high-temperature high-lead slag melt produced by bottom blowing furnace oxidation smelting is cooled by a slag casting system and is cast into blocks, so that the reduction smelting of the blast furnace is facilitated. A large amount of heat in the liquid high-lead slag is released to be cooled into blocks, and then the blocks are heated in a blast furnace to be melted, so that the heat in the liquid high-lead slag cannot be directly utilized, energy waste is caused, and a production system is huge and complex; the current internationally advanced QSL lead smelting technology allows oxidation-reduction to be carriedout in the same furnace, but the large investment and technical introduction costs and the high technical level requirements make the operation of the reduction section difficult to control. The production system introduced by silver companies in China is that the reduction section cannot be well controlled and cannot be produced normally so far.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the method for directly reducing the liquid high-lead slag of the oxygen bottom-blowing furnace and the special reducing furnace, which have the advantages of low investment, low energy consumption, simple equipment system and easy control of process operation in the lead smelting process.
The purpose of the invention is realized as follows: directly injecting the liquid high-lead slag melt with high temperature and large heat discharged by the oxidation smelting of the bottom blowing furnace into a reduction furnace for reduction smelting, simultaneously adding crushed coal or crushed coke into the reduction furnace, and supplying oxygen into the reduction furnace through a gas spray gun at the side part of the bottom of the reduction furnace. The oxygen supply mode of the gas spray gun at the side part of the reduction furnace bottom is that the liquid high-lead slag melt can be stirred under the action of the oxygen of the gas spray gun, so that the liquid high-lead slag melt is fully contacted with crushed coal or crushed coke and oxygen, the full reaction of CO gas and the high-aluminum slag melt is completed, and metal Pb is generated. After the high lead slag melt is added into the reduction furnace, after the gas spray gun supplies high-pressure oxygen and nitrogen, the high lead slag melt is blown and rotates to generate vortex to form an obvious concave liquid surface, and the gas spraygun enters the reduction furnace along the furnace wall at a certain angle. The heat and the reducing atmosphere can be controlled by adjusting the coal quantity and the oxygen quantity, lead liquid produced by the reaction is deposited at the bottom and is discharged by a lead siphon, slag after the reaction is discharged from a slag surface control pool through a slag outlet, the height of the molten liquid in the furnace can be controlled by controlling the height of the slag surface control pool, the slag can be further precipitated and separated in an electric heating forehearth if the lead and the slag after the reaction are not completely separated, and the produced smoke is treated separately.
A special reduction furnace for directly reducing liquid high-lead slag of an oxygen bottom-blowing furnace comprises a furnace body and a flue, wherein the furnace body consists of a molten pool part at the lower half part and a smoke rising cooling part at the upper half part, the flue is arranged on the furnace body, the upper part of the furnace body is provided with a feeding port for crushed coal or crushed coke, the upper part of the furnace body is provided with a cooling water jacket, the feeding port for high-lead slag melt is arranged on the cooling water jacket, the side part of the bottom of the reduction furnace is provided with a gas spray gun, the molten pool part is provided with a slag outlet, a slag surface control pool is arranged at the slag outlet of the furnace body, the bottom of the furnace body is provided with a lead siphon for discharging lead liquid deposited at the bottom of the furnace body in a reaction mode, the furnace is a circular shaft furnace, and the gas spray gun and the circular diameter of a cross.
The invention has the following advantages: the method has the advantages of less equipment investment, low labor intensity, good labor environment, high reduction speed, strong operability, small occupied area, low smoke dust rate, convenient and cheap source of the thermal reducing agent, full utilization of heat of the high lead slag melt and the like.
Drawings
FIG. 1 is a schematic flow diagram of the reduction process of the present invention.
FIG. 2 is a schematic structural diagram of the dedicated reduction furnace of the present invention.
FIG. 3 is a schematic view showing the positions of the gas injection lance and the cross-section of the circular reduction furnace of the special reduction furnace according to the present invention.
Detailed Description
As shown in figure 1, the invention directly injects the liquid high lead slag melt with high temperature and large heat discharged by the oxidation smelting of the bottom blowing furnace into the reduction furnace for reduction smelting, simultaneously adds crushed coal or crushed coke into the reduction furnace, and supplies oxygen into the reduction furnace through a gas spray gun at the side part of the reduction furnace bottom. The oxygen supply mode of the gas spray gun at the side part of the reduction furnace bottom is that the liquid high lead slag melt can be stirred under the action of the oxygen of the gas spray gun, so that the liquid high lead slag melt is fully contacted with crushed coal or crushed coke and oxygen, the full reaction of CO gas and the high lead slag melt is completed, and metal Pb is generated. After the high lead slag melt is added into the reduction furnace, after the gas spray gun supplies high-pressure oxygen and nitrogen, the high lead slag melt is blown and rotates to generate vortex to form an obvious concave liquid surface, and a nozzle of the gas spray gun is not perpendicular to the furnace wall and enters the reduction furnace along the furnace wall at a certain angle. The heat and the reducing atmosphere can be controlled by adjusting the coal quantity and the oxygen quantity, lead liquid produced by the reaction is deposited at the bottom and is discharged by a lead siphon, slag after the reaction is discharged from a slag surface control pool through a slag outlet, the height of the molten liquid in the furnace can be controlled by controlling the height of the slag surface control pool, the slag can be further precipitated and separated in an electric heating forehearth if the lead and the slag after the reaction are not completely separated, and the produced smoke is treated separately.
The liquid high lead slag melt discharged by the bottom blowing furnace oxidation smelting has the characteristics of high temperature and large heat, and is directly injected into a reduction furnace for reduction smelting, crushed coal or crushed coke in the reduction furnace is subjected to combustion reaction when meeting oxygen, and the heat is discharged to maintain the process temperature, and simultaneously, reducing gas CO is generated. The high-temperature crushed coal or the crushed coal and the CO gas can react with the high-lead slag to generate metal Pb.
As shown in figures 2 and 3, the special reduction furnace for directly reducing the liquid high lead slag of the oxygen bottom-blowing furnace comprises a furnace body 5 consisting of a molten pool part at the lower part and a flue gas ascending and cooling part at the upper part, a flue 1 arranged on the furnace body, an inlet 2 for crushed coal or crushed coke arranged at the upper part of the furnace body, a cooling water jacket 4 arranged at the upper part of the furnace body, an inlet 3 for high lead slag melt 11 arranged on the cooling water jacket 4, a gas spray gun 9 arranged at the side part of the reduction furnace bottom, a slag outlet 8 arranged at the molten pool part, a slag surface control pool 7 arranged outside the furnace body 5, and a lead siphon 10 arranged at the bottom of the furnace body for discharging lead liquid 12 reacted and deposited at the bottom of the furnace body, wherein the furnace is a circular shaft furnace, and the gas spray gun has an included angle α - α -29 degrees with the circular diameter of the cross section passing through the intersection of.
After the crushed coal or the crushed coke is added at the crushed coal or crushed coke adding port 2, oxygen is simultaneously supplied at the gas spray gun 9 at the side part of the reduction furnace bottom to be combusted, heat is released and CO reducing gas is produced, thereby ensuring the temperature and reducing atmosphere in the furnace. The key equipment of the scheme is a reduction furnace and a gas spray gun; the furnace is a circular shaft furnace, which consists of a molten pool part at the lower half part and a smoke ascending and cooling part at the upper half part; the key technical point is that the gas spray gun is not vertical to the furnace wall, so that after the high-lead slag melt is added at the adding port 3, the high-lead slag melt is blown and rotated after the gas spray gun supplies high-pressure oxygen and nitrogen to generate a vortex to form an obvious concave liquid surface; part of crushed coal or crushed coke 6 is immersed in the melt 11, so that the contact between the high-temperature crushed coal or crushed coke and the melt is greatly enhanced, the generated CO gas and the high-temperature crushed coal (or crushed coal) can react with the high-lead slag to generate metal Pb, and the reaction mechanism is as follows:
the heat and reducing atmosphere can be conveniently controlled by adjusting the coal amount and the oxygen amount. Lead liquid produced by the reaction is heavier and is deposited at the bottom and is discharged by a lead siphon 10; the reacted slag is discharged from a slag surface control pool 7 through a slag outlet 8, and the height of the molten metal level in the furnace can be controlled by controlling the height of the slag surface control pool; if the lead and the slag after the reaction are not completely separated, the slag can flow into an electric heating fore-bed for further precipitation and separation; the produced smoke is treated additionally.
Claims (6)
1. A method for directly reducing liquid high-lead slag of an oxygen bottom-blowing furnace is characterized by comprising the following steps: directly injecting the liquid high-lead slag melt with high temperature and large heat released by the oxidation smelting of the bottom blowing furnace into a reduction furnace for reduction smelting, simultaneously adding crushed coal or crushed coke into the reduction furnace, and supplying oxygen into the reduction furnace through a gas spray gun at the side part of the bottom of the reduction furnace.
2. The method for directly reducing the liquid high lead slag of the oxygen bottom blowing furnace according to the claim 1, which is characterized in that: the oxygen supply mode of the gas spray gun at the side part of the reduction furnace bottom is that the liquid high lead slag melt can be stirred under the action of the oxygen of the gas spray gun, so that the liquid high lead slag melt is fully contacted with crushed coal or crushed coke and oxygen, the full reaction of CO gas and the high lead slag melt is completed, and metal Pb is generated.
3. The method for directly reducing the liquid high lead slag of the oxygen bottom blowing furnace according to the claim 2, which is characterized in that: after the high lead slag melt is added into the reduction furnace, after the gas spray gun supplies high-pressure oxygen and nitrogen, the high lead slag melt is blown and rotates to generate vortex to form an obvious concave liquid surface, and a nozzle of the gas spray gun is not perpendicular to the furnace wall and enters the reduction furnace along the furnace wall at a certain angle.
4. The method for directly reducing the liquid high lead slag of the oxygen bottom blowing furnace according to the claim 3, which is characterized in that: the heat and the reducing atmosphere can be controlled by adjusting the coal quantity and the oxygen quantity, lead liquid produced by the reaction is deposited at the bottom and is discharged by a lead siphon, slag after the reaction is discharged from a slag surface control pool through a slag outlet, the height of the molten liquid in the furnace can be controlled by controlling the height of the slag surface control pool, the slag can be further precipitated and separated in an electric heating forehearth if the lead and the slag after the reaction are not completely separated, and the produced smoke is treated separately.
5. The utility model provides a special reduction furnace of oxygen bottom blowing stove liquid high lead slag direct reduction, includes furnace body (5), flue (1) of setting on the furnace body that the cooling part constitutes by the molten bath part of lower half and the flue gas of first half, its characterized in that: the furnace is characterized in that an inlet (2) for crushed coal or crushed coke is arranged at the upper part of the furnacebody, a cooling water jacket (4) is arranged at the upper part of the furnace body, a high-lead slag melt (11) inlet (3) is arranged on the cooling water jacket (4), a gas spray gun (9) is arranged at the side part of the bottom of the reduction furnace, a slag outlet (8) is arranged at the molten pool part, a slag surface control pool (7) is arranged outside the furnace body (5), and a lead siphon (10) for discharging lead liquid (12) which reacts and deposits at the bottom of the furnace body is arranged at the bottom of.
6. The special reduction furnace for direct reduction of liquid high lead slag in oxygen bottom-blowing furnace according to claim 4, characterized in that the furnace is a circular shaft furnace, the gas lance has an angle α with the diameter of the circle passing through the cross-section of the intersection of the gas lance and the furnace wall, which is between 14 ° and α ° and 29 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410010377 CN1594614A (en) | 2004-06-29 | 2004-06-29 | Direct reduction process for liquid high lead skim of oxygen bottom blowing furnace and special reducing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410010377 CN1594614A (en) | 2004-06-29 | 2004-06-29 | Direct reduction process for liquid high lead skim of oxygen bottom blowing furnace and special reducing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1594614A true CN1594614A (en) | 2005-03-16 |
Family
ID=34662618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410010377 Pending CN1594614A (en) | 2004-06-29 | 2004-06-29 | Direct reduction process for liquid high lead skim of oxygen bottom blowing furnace and special reducing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1594614A (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101086038B (en) * | 2007-01-04 | 2010-11-17 | 河南豫光金铅股份有限公司 | Direct lead smelting method in molten pool and its device |
| CN101385935B (en) * | 2008-05-23 | 2011-04-27 | 南安市三晶阳光电力有限公司 | Water-cooling dust-separating method of metallic silicon smelting furnace |
| CN102135376A (en) * | 2010-01-26 | 2011-07-27 | 蒋明学 | Stepped furnace |
| CN102312103A (en) * | 2011-09-16 | 2012-01-11 | 北京矿冶研究总院 | Method for direct reduction smelting of molten liquid lead-containing slag |
| CN101512024B (en) * | 2006-08-01 | 2012-01-25 | 奥斯梅尔特有限公司 | Lead slag reduction |
| CN102634674A (en) * | 2012-04-27 | 2012-08-15 | 湖南华信有色金属有限公司 | Oxygen bottom-blowing smelting and liquid-state high-lead slag side-blowing direct reduction process |
| CN102828038A (en) * | 2012-09-07 | 2012-12-19 | 白银有色集团股份有限公司 | Method for treating converter slag of symmetrical full-slant copper melting pool smelting furnace |
| CN102021347B (en) * | 2009-09-10 | 2012-12-26 | 西北矿冶研究院 | Slag pulverized coal direct reduction lead smelting process and pulverized coal reduction lead smelting horizontal smelting device |
| CN103993176A (en) * | 2014-05-13 | 2014-08-20 | 中国恩菲工程技术有限公司 | Rich-oxygen top-blown smelting/liquid high-lead slag side-blown direct-reduction lead smelting process |
| CN104894397A (en) * | 2015-06-30 | 2015-09-09 | 中国恩菲工程技术有限公司 | Method for adopting oxygen-enriched vortex bath smelting furnace to treat antimony-containing material |
| CN104894385A (en) * | 2015-06-30 | 2015-09-09 | 中国恩菲工程技术有限公司 | Method for adopting oxygen-enriched vortex bath smelting furnace to treat antimony-oxygen smoke |
| CN104894389A (en) * | 2015-06-30 | 2015-09-09 | 中国恩菲工程技术有限公司 | Method for adopting oxygen-enriched vortex bath smelting furnace to treat secondary lead-containing sundry |
| CN104894390A (en) * | 2015-06-30 | 2015-09-09 | 中国恩菲工程技术有限公司 | Method of adopting oxygen-enriched vortex bath smelting furnace for treatment of jamesonite |
| CN104928493A (en) * | 2015-06-30 | 2015-09-23 | 中国恩菲工程技术有限公司 | Method of adopting oxygen-enriched vortex bath smelting furnace to treat secondary copper-containing sundry |
| CN105039740A (en) * | 2015-08-06 | 2015-11-11 | 中国恩菲工程技术有限公司 | Method for treating nickel laterite ore through oxygen-enriched vortex molten pool smelting furnace |
| CN106011496A (en) * | 2016-05-25 | 2016-10-12 | 云南雄冶科技有限公司 | Double-area molten pool smelting furnace and lead and tin co-smelting smelting method thereof |
| CN109371256A (en) * | 2018-11-29 | 2019-02-22 | 大余明发矿业有限公司 | A kind of lead reclaimer and its lead recovery process |
-
2004
- 2004-06-29 CN CN 200410010377 patent/CN1594614A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101512024B (en) * | 2006-08-01 | 2012-01-25 | 奥斯梅尔特有限公司 | Lead slag reduction |
| CN101086038B (en) * | 2007-01-04 | 2010-11-17 | 河南豫光金铅股份有限公司 | Direct lead smelting method in molten pool and its device |
| CN101385935B (en) * | 2008-05-23 | 2011-04-27 | 南安市三晶阳光电力有限公司 | Water-cooling dust-separating method of metallic silicon smelting furnace |
| CN102021347B (en) * | 2009-09-10 | 2012-12-26 | 西北矿冶研究院 | Slag pulverized coal direct reduction lead smelting process and pulverized coal reduction lead smelting horizontal smelting device |
| CN102135376A (en) * | 2010-01-26 | 2011-07-27 | 蒋明学 | Stepped furnace |
| CN102312103A (en) * | 2011-09-16 | 2012-01-11 | 北京矿冶研究总院 | Method for direct reduction smelting of molten liquid lead-containing slag |
| CN102634674A (en) * | 2012-04-27 | 2012-08-15 | 湖南华信有色金属有限公司 | Oxygen bottom-blowing smelting and liquid-state high-lead slag side-blowing direct reduction process |
| CN102828038A (en) * | 2012-09-07 | 2012-12-19 | 白银有色集团股份有限公司 | Method for treating converter slag of symmetrical full-slant copper melting pool smelting furnace |
| CN103993176A (en) * | 2014-05-13 | 2014-08-20 | 中国恩菲工程技术有限公司 | Rich-oxygen top-blown smelting/liquid high-lead slag side-blown direct-reduction lead smelting process |
| CN103993176B (en) * | 2014-05-13 | 2016-04-13 | 中国恩菲工程技术有限公司 | Oxygen-enriched top blowing melting-liquid high lead dross side-blown direct-reduction refining splicer skill |
| CN104894397A (en) * | 2015-06-30 | 2015-09-09 | 中国恩菲工程技术有限公司 | Method for adopting oxygen-enriched vortex bath smelting furnace to treat antimony-containing material |
| CN104894385A (en) * | 2015-06-30 | 2015-09-09 | 中国恩菲工程技术有限公司 | Method for adopting oxygen-enriched vortex bath smelting furnace to treat antimony-oxygen smoke |
| CN104894389A (en) * | 2015-06-30 | 2015-09-09 | 中国恩菲工程技术有限公司 | Method for adopting oxygen-enriched vortex bath smelting furnace to treat secondary lead-containing sundry |
| CN104894390A (en) * | 2015-06-30 | 2015-09-09 | 中国恩菲工程技术有限公司 | Method of adopting oxygen-enriched vortex bath smelting furnace for treatment of jamesonite |
| CN104928493A (en) * | 2015-06-30 | 2015-09-23 | 中国恩菲工程技术有限公司 | Method of adopting oxygen-enriched vortex bath smelting furnace to treat secondary copper-containing sundry |
| CN105039740A (en) * | 2015-08-06 | 2015-11-11 | 中国恩菲工程技术有限公司 | Method for treating nickel laterite ore through oxygen-enriched vortex molten pool smelting furnace |
| CN106011496A (en) * | 2016-05-25 | 2016-10-12 | 云南雄冶科技有限公司 | Double-area molten pool smelting furnace and lead and tin co-smelting smelting method thereof |
| CN109371256A (en) * | 2018-11-29 | 2019-02-22 | 大余明发矿业有限公司 | A kind of lead reclaimer and its lead recovery process |
| CN109371256B (en) * | 2018-11-29 | 2023-09-22 | 大余明发矿业有限公司 | Lead recovery equipment and lead recovery process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1594614A (en) | Direct reduction process for liquid high lead skim of oxygen bottom blowing furnace and special reducing furnace | |
| CN102433450B (en) | Oxygen-enriched side-blown reduction molten pool smelting furnace and method for smelting tin by using tin-enriched complex material in smelting furnace | |
| KR100611692B1 (en) | A direct smelting process and apparatus | |
| CN201514112U (en) | Levitation melting side-blown reduction lead smelting furnace | |
| CN104988332B (en) | One-step copper smelting process and device | |
| CN102374781A (en) | Direct lead-smelting comprehensive metallurgical device and smelting process | |
| CN201321482Y (en) | Oxygen side-blowing copper smelting furnace | |
| CN111235388B (en) | Side-top-blown molten pool tin smelting process and smelting furnace | |
| CN106011341A (en) | Method for improving coal ratio in schreyerite blast furnace smelting | |
| CN106086281B (en) | A kind of flash ironmaking and the integrated apparatus and method of coal gas | |
| CN204039474U (en) | Bottom blowing tin metallurgy device | |
| CN102146519B (en) | Sintering-free desulfurization coke-free reduction lead smelting method and pulverized coal reduction lead smelting double-chamber furnace | |
| CN108165773A (en) | Hot carbide slag granulation and grain slag separation method | |
| CN103063030B (en) | A kind of modified compound stove of slag and operating procedure thereof | |
| CN102021347B (en) | Slag pulverized coal direct reduction lead smelting process and pulverized coal reduction lead smelting horizontal smelting device | |
| CN104073652A (en) | Side-blown tin smelting device | |
| CN107828968A (en) | A kind of low-grade copper scap cleaning novel process for smelting and its device | |
| CN103382526A (en) | Direct lead-smelting reducing furnace gas-injection method and device thereof | |
| CN1263874C (en) | Process for direct reduction of lead from high content of liquid lead dreg in bottom blowing furnace | |
| CN107385228A (en) | A kind of immersion oxygen rifle continuous converting tilts metallurgical furnace | |
| CN204918716U (en) | One step of copper metallurgy device | |
| CN208055432U (en) | A kind of five sections of integrated smelting furnaces of intensified smelting processing lead-containing material | |
| CN206438158U (en) | A kind of two step lead smelting process devices | |
| CN104073654A (en) | Side-blowing tin smelting technique | |
| CN201463498U (en) | Lead refining device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |