CN103409575A - Reducing agent for slag cleaning furnace top-blown immersion blowing reduction - Google Patents
Reducing agent for slag cleaning furnace top-blown immersion blowing reduction Download PDFInfo
- Publication number
- CN103409575A CN103409575A CN2013103506928A CN201310350692A CN103409575A CN 103409575 A CN103409575 A CN 103409575A CN 2013103506928 A CN2013103506928 A CN 2013103506928A CN 201310350692 A CN201310350692 A CN 201310350692A CN 103409575 A CN103409575 A CN 103409575A
- Authority
- CN
- China
- Prior art keywords
- oil
- slag
- reduction
- reductive agent
- cleaning furnace
- 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.)
- Granted
Links
- 239000002893 slag Substances 0.000 title claims abstract description 56
- 238000004140 cleaning Methods 0.000 title claims abstract description 22
- 238000007654 immersion Methods 0.000 title claims abstract description 14
- 239000003638 chemical reducing agent Substances 0.000 title abstract description 11
- 238000007664 blowing Methods 0.000 title abstract 3
- 238000006722 reduction reaction Methods 0.000 claims abstract description 43
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 230000002829 reductive effect Effects 0.000 claims description 40
- 239000003795 chemical substances by application Substances 0.000 claims description 36
- 230000018044 dehydration Effects 0.000 claims description 16
- 238000006297 dehydration reaction Methods 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 7
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 4
- 239000002699 waste material Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 abstract description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract 2
- 238000005272 metallurgy Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 60
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 7
- 238000010790 dilution Methods 0.000 description 7
- 239000012895 dilution Substances 0.000 description 7
- 238000003723 Smelting Methods 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000002283 diesel fuel Substances 0.000 description 4
- 238000003113 dilution method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000008157 edible vegetable oil Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000010583 slow cooling Methods 0.000 description 2
- 206010016952 Food poisoning Diseases 0.000 description 1
- 208000019331 Foodborne disease Diseases 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000009853 pyrometallurgy Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Abstract
The invention relates to a reducing agent for slag cleaning furnace top-blown immersion blowing reduction, and belongs to the technical field of fire method metallurgy. The reducing agent for slag cleaning furnace top-blown immersion blowing reduction is filtered dehydrated waste oil or an oil gas mixture formed from filtered dehydrated waste oil and high pressure nitrogen in a volume ratio of (1-1.25): (200-600). First, the reducing agent of filtered dehydrated waste oil or oil gas mixture formed from filtered dehydrated waste oil and high pressure nitrogen into a pipeline controlled by a self adjusting valve; then a reduction oil gun connected with the pipeline, inserted from the top of the slag cleaning furnace and immersed in a molten pool slag layer is used for top-blown, so that magnetic iron oxide in the electroslag is subjected to a reduction reaction. The invention realizes high-efficiency, low-cost and resource utilization of the waste oil, increases reduction efficiency of the reducing agent and reduces production cost of slag depletion.
Description
Technical field
The present invention relates to a kind of reductive agent for slag cleaning furnace top-blown immersion, belong to the pyrometallurgy technical field.
Background technology
In nonferrous smelting, the application of oxygen enrichment intensified smelting technology is more and more wider, and it certainly will make martial ethiops be enriched in slag, increases slag viscosity, is unfavorable for the separation of copper in subsequent technique, slag, thereby causes the slag copper content to raise.For improving the rate of recovery of copper, after the oxygen enrichment intensified smelting, slag must, by further dilution, reduce copper content in slag.
At present, in the pyrometallurgical smelting process of copper, the method for dilution smelting slag mainly contains slow cooling flotation process and melting dilution method.The slow cooling flotation process is longer because of technical process, and need consume other a large amount of materials and cause economic benefit poor.Melting dilution method mainly contains converter dilution and electric dilution method, converter dilution method because of the waste cupric all more than 1%, apply at home less; The electric dilution effect is better, and can control the slag copper content between 0.4%～1% and find broad application.
At present, in electric dilution slag process, generally add the solid reduction materials such as coke, coal and charcoal to reduce, its shortcoming is that reduction efficiency is low and energy consumption is high.Adopt the reduction efficiency of the gaseous reducing agents such as Sweet natural gas, coal gas or liquefied gas high, but it is subjected to the geographical conditions restriction and larger potential safety hazard is at high temperature arranged.
The patent No. is that CN200510010980.4 discloses a kind of " slag cleaning furnace top-blown immersion technology ", this technology be take diesel oil or diesel oil and is added the mixture that the compression air forms and be reductive agent, when in electric furnace slag, magnetic oxygenated iron level reaches 8～12%, controlling the oil atomizer gun oil mass is 80～130 l/hs, oil atomizer gun is inputted to the DCS system and by automatic regulating valve, controlled and sprayed into melt later; By reducing degree and furnace atmosphere, allocated into pressurized air and regulated air quantity, the compression air quantity is controlled at 600～1100Nm
3/ hour, reductive agent is delivered to the pipeline that automatic regulating valve is controlled, pipeline is connected with oil atomizer gun, oil atomizer gun is immersed in melt from insertion molten bath, body of heater top, and the mode of employing top blast is blown into melt by injection of reducing agent martial ethiops is reduced, and this invention has improved the reduction efficiency of reductive agent greatly, effectively improve the mobility of electric furnace slag, reduce Copper Loss in Slag from Electric, and can alleviate, process dross in stove, effectively guarantee carrying out smoothly of slag cleaning furnace technique.But should invention adopt the liquid reducers such as diesel oil, but the diesel consumption of dilution slag per ton is more than 2L, thereby increases production cost.
And the sewer oil of all kinds of poor quality oils in the conduct life, after a part was reclaimed by illegal retailer, the edible oil through refining into personation flowed on dining table, can cause food poisoning, even carcinogenic, the serious harm human health.Even do not refined into edible oil, sewer oil also can cause: (1) trench causes the waste water crossing current after stopping up, easily smelly, has a strong impact on environment; (2) because waste oil does not recycle (can be used as sanitas, separant of mechanical lubricating oil, building materials etc.), cause the waste of resource.
Summary of the invention
The present invention is directed to problem and deficiency that prior art exists, a kind of reductive agent for slag cleaning furnace top-blown immersion is provided.The present invention has realized efficient, the low-cost recycling of sewer oil, improves simultaneously the reduction efficiency of reductive agent, and has reduced the production cost of slag depletion, and the present invention is achieved through the following technical solutions.
A kind of reductive agent for slag cleaning furnace top-blown immersion, described reductive agent are filter dehydration sewer oil or filter dehydration sewer oil and high pressure nitrogen with volume ratio (1～1.25): the gas-oil mixture that (200～600) form.
Described filter dehydration sewer oil water ratio is 5～9%.
The using method of this above-mentioned reductive agent, its concrete steps are as follows: the reductive agent that by temperature is at first 40～50 ℃ is delivered in the pipeline of automatic regulating valve control, then by with pipeline, be connected, from the slag cleaning furnace top, insert and be immersed in the reduction oil gun top blast the slag blanket of molten bath, making the temperature in electric furnace slag is the reduction reactions of 1250～1290 ℃ of martial ethiopss through 4～8h.
When in described electric furnace slag, magnetic oxygenated iron level reaches 9～11.5%, control 100～125 l/hs of reduction oil gun oil masses.
When described reductive agent was the gas-oil mixture of filter dehydration sewer oil and high pressure nitrogen formation, the flow of high pressure nitrogen was 20～60Nm
3/ hour.
The invention has the beneficial effects as follows: (1) this reductive agent replaces the solid of commonly using, diesel oil, gaseous reducing agent with this kitchen castoff of sewer oil, higher with respect to its reduction efficiency of solid reductant, with respect to gaseous reducing agent, has reduced potential safety hazard; (2) this reductive agent directly sprays into sewer oil in melt, and obtain certain atomization, therefore increased substantially reduction efficiency, and when spraying into high pressure nitrogen simultaneously, melt around the reduction oil gun is played to stronger agitaion, improve and accelerated kinetics of reduction, further shortened the dilution time, play fuel-economizing effect preferably; (3) realized that sewer oil turns waste into wealth, improved kitchen castoff recycling and harmless treatment level, reduced significantly production cost.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1
Should be for the reductive agent of slag cleaning furnace top-blown immersion, reductive agent is filter dehydration sewer oil (water ratio is 5%).
The using method of this reductive agent, its concrete steps are as follows: filter dehydration sewer oil (water ratio the is 5%) reductive agent that by temperature is at first 40 ℃ is delivered in the pipeline of automatic regulating valve control, then by with pipeline, be connected, from the slag cleaning furnace top, insert and be immersed in the reduction oil gun top blast the slag blanket of molten bath, making the temperature in electric furnace slag is the reduction reactions of 1250 ℃ of martial ethiopss through 4h.When wherein in electric furnace slag, magnetic oxygenated iron level reaches 9%, control 100 l/hs of reduction oil gun oil masses, the reduction oil gun is the single hose spray gun, insert the position of a reduction oil gun to burner, the degree of depth is 350mm, separately inserts a reduction oil gun to the position in stove, and the degree of depth is 500mm.
Embodiment 2
Should be for the reductive agent of slag cleaning furnace top-blown immersion, reductive agent is filter dehydration sewer oil (water ratio is 9%) and the gas-oil mixture of high pressure nitrogen with volume ratio 1:600 formation.
The using method of this reductive agent, its concrete steps are as follows: by temperature, be at first that 50 ℃ of filter dehydration sewer oils (water ratio is 9%) are delivered in the pipeline of automatic regulating valve control with the gas-oil mixture reductive agent that high pressure nitrogen forms with volume ratio 1:600, then by with pipeline, be connected, from the slag cleaning furnace top, insert and be immersed in the reduction oil gun top blast the slag blanket of molten bath, making the temperature in electric furnace slag is the reduction reactions of 1290 ℃ of martial ethiopss through 8h.When wherein in electric furnace slag, magnetic oxygenated iron level reaches 9%, control 100 l/hs of reduction oil gun oil masses, the flow of high pressure nitrogen is 60Nm
3/ hour; The reduction oil gun is concentric locking collar tubular type spray gun, inserts the position of two reduction oil guns to burner, and the degree of depth is respectively 360mm, 380mm, then inserts three reduction oil guns to the position in stove, and the degree of depth is respectively 480mm, 500mm, 520mm.
Embodiment 3
Should be for the reductive agent of slag cleaning furnace top-blown immersion, described reductive agent is filter dehydration sewer oil (water ratio is 8%) and the gas-oil mixture of high pressure nitrogen with volume ratio 1.25:200 formation.
The using method of this reductive agent, its concrete steps are as follows: by temperature, be at first that 45 ℃ of filter dehydration sewer oils (water ratio is 8%) are delivered in the pipeline of automatic regulating valve control with the gas-oil mixture reductive agent that high pressure nitrogen forms with volume ratio 1.25:200, then by with pipeline, be connected, from the slag cleaning furnace top, insert and be immersed in the reduction oil gun top blast the slag blanket of molten bath, making the temperature in electric furnace slag is the reduction reactions of 1280 ℃ of martial ethiopss through 6h.When wherein in electric furnace slag, magnetic oxygenated iron level reaches 11.5%, control 125 l/hs of reduction oil gun oil masses, the flow of high pressure nitrogen is 20Nm
3/ hour; The reduction oil gun is concentric locking collar tubular type spray gun, inserts three reduction oil guns to the position in stove, and the degree of depth is respectively 500mm, 510mm, 520mm, then inserts the position to the stove tail, and the degree of depth is 700mm.
Embodiment 4
Should be for the reductive agent of slag cleaning furnace top-blown immersion, described reductive agent is filter dehydration sewer oil (water ratio is 9%) and the gas-oil mixture of high pressure nitrogen with volume ratio 1.2:400 formation.
The using method of this reductive agent, its concrete steps are as follows: by temperature, be at first that 40 ℃ of filter dehydration sewer oils (water ratio is 9%) are delivered in the pipeline of automatic regulating valve control with the gas-oil mixture reductive agent that high pressure nitrogen forms with volume ratio 1.2:400, then by with pipeline, being connected, from the slag cleaning furnace top, insert and be immersed in the reduction oil gun top blast the slag blanket of molten bath, making the temperature in electric furnace slag is the reduction reactions of 1250 ℃ of martial ethiopss through 4h, when wherein in electric furnace slag, magnetic oxygenated iron level reaches 11%, control 120 l/hs of reduction oil gun oil masses, the flow of high pressure nitrogen is 40Nm
3/ hour, the reduction oil gun is concentric locking collar tubular type spray gun, inserts the position of two reduction oil guns to burner, and the degree of depth is respectively 360mm, 380mm, separately inserts two reduction oil guns to the position in stove, and the degree of depth is respectively 500mm, 520mm.
Claims (5)
1. reductive agent for slag cleaning furnace top-blown immersion is characterized in that: described reductive agent is filter dehydration sewer oil or filter dehydration sewer oil and high pressure nitrogen with volume ratio (1～1.25): the gas-oil mixture that (200～600) form.
2. the reductive agent for slag cleaning furnace top-blown immersion according to claim 1, it is characterized in that: described filter dehydration sewer oil water ratio is 5～9%.
3. the using method of claim 1 or 2 a described reductive agent, it is characterized in that concrete steps are as follows: the reductive agent that by temperature is at first 40～50 ℃ is delivered in the pipeline of automatic regulating valve control, then by with pipeline, be connected, from the slag cleaning furnace top, insert and be immersed in the reduction oil gun top blast the slag blanket of molten bath, making the temperature in electric furnace slag is the reduction reactions of 1250～1290 ℃ of martial ethiopss through 4～8h.
4. using method according to claim 3, is characterized in that: when in described electric furnace slag, magnetic oxygenated iron level reaches 9～11.5%, control 100～125 l/hs of reduction oil gun oil masses.
5. using method according to claim 3 is characterized in that: described reductive agent be filter dehydration sewer oil and high pressure nitrogen form gas-oil mixture the time, the flow of high pressure nitrogen is 20～60Nm
3/ hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310350692.8A CN103409575B (en) | 2013-08-13 | 2013-08-13 | Reducing agent for slag cleaning furnace top-blown immersion blowing reduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310350692.8A CN103409575B (en) | 2013-08-13 | 2013-08-13 | Reducing agent for slag cleaning furnace top-blown immersion blowing reduction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103409575A true CN103409575A (en) | 2013-11-27 |
| CN103409575B CN103409575B (en) | 2015-06-03 |
Family
ID=49602616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310350692.8A Active CN103409575B (en) | 2013-08-13 | 2013-08-13 | Reducing agent for slag cleaning furnace top-blown immersion blowing reduction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103409575B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103725896A (en) * | 2013-12-13 | 2014-04-16 | 金川集团股份有限公司 | Copper-nickel sulfide ore concentrate smelting method through pyrometallurgy |
| CN104232907A (en) * | 2014-09-05 | 2014-12-24 | 昆明理工大学 | Top-side blowing parameter control method of depletion electric furnace |
| CN104327885A (en) * | 2014-10-10 | 2015-02-04 | 昆明理工大学 | Hogwash oil mixed oil fuel reducing agent applied to metallurgy pyrometallurgical process |
| CN104531998A (en) * | 2014-12-19 | 2015-04-22 | 昆明理工大学 | Reducing agent for bath smelting of heavy non-ferrous metals |
| CN106048246A (en) * | 2016-08-18 | 2016-10-26 | 昆明理工大学 | Application of additive to regulation and control of slag viscosity in pyrometallurgy process of non-ferrous metal |
| CN106916962A (en) * | 2017-01-18 | 2017-07-04 | 昆明理工大学 | A kind of low-carbon (LC) copper smelting by pyrometallurgy method that biomass fuel scale is utilized |
| CN111455193A (en) * | 2020-04-10 | 2020-07-28 | 云南铜业股份有限公司西南铜业分公司 | Magnetic iron reduction method for electric dilution furnace |
| CN112028031A (en) * | 2020-08-04 | 2020-12-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing sodium sulfide by melting reduction of industrial sodium sulfate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000021019A (en) * | 1998-09-25 | 2000-04-15 | 문상우 | Preparation method of zinc sulfate and(or) ferrous sulfate without containing chlorine from electric furnace dust or zinc ash |
| CN1730673A (en) * | 2005-08-26 | 2006-02-08 | 云南铜业股份有限公司 | Slag cleaning furnace top-blown immersion technology |
-
2013
- 2013-08-13 CN CN201310350692.8A patent/CN103409575B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000021019A (en) * | 1998-09-25 | 2000-04-15 | 문상우 | Preparation method of zinc sulfate and(or) ferrous sulfate without containing chlorine from electric furnace dust or zinc ash |
| CN1730673A (en) * | 2005-08-26 | 2006-02-08 | 云南铜业股份有限公司 | Slag cleaning furnace top-blown immersion technology |
Non-Patent Citations (2)
| Title |
|---|
| 曹洪杨 等: "国内外铜渣的贫化", 《材料与冶金学报》, vol. 8, no. 1, 31 March 2009 (2009-03-31), pages 33 - 39 * |
| 肖卫锋: ""地沟油"在高炉炼铁生产中应用的设想", 《四川冶金》, vol. 35, no. 1, 28 February 2013 (2013-02-28), pages 28 - 31 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103725896A (en) * | 2013-12-13 | 2014-04-16 | 金川集团股份有限公司 | Copper-nickel sulfide ore concentrate smelting method through pyrometallurgy |
| CN104232907A (en) * | 2014-09-05 | 2014-12-24 | 昆明理工大学 | Top-side blowing parameter control method of depletion electric furnace |
| CN104327885A (en) * | 2014-10-10 | 2015-02-04 | 昆明理工大学 | Hogwash oil mixed oil fuel reducing agent applied to metallurgy pyrometallurgical process |
| CN104531998A (en) * | 2014-12-19 | 2015-04-22 | 昆明理工大学 | Reducing agent for bath smelting of heavy non-ferrous metals |
| CN106048246A (en) * | 2016-08-18 | 2016-10-26 | 昆明理工大学 | Application of additive to regulation and control of slag viscosity in pyrometallurgy process of non-ferrous metal |
| CN106916962A (en) * | 2017-01-18 | 2017-07-04 | 昆明理工大学 | A kind of low-carbon (LC) copper smelting by pyrometallurgy method that biomass fuel scale is utilized |
| CN111455193A (en) * | 2020-04-10 | 2020-07-28 | 云南铜业股份有限公司西南铜业分公司 | Magnetic iron reduction method for electric dilution furnace |
| CN111455193B (en) * | 2020-04-10 | 2022-08-05 | 云南铜业股份有限公司西南铜业分公司 | Magnetic iron reduction method for electric dilution furnace |
| CN112028031A (en) * | 2020-08-04 | 2020-12-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing sodium sulfide by melting reduction of industrial sodium sulfate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103409575B (en) | 2015-06-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103409575B (en) | Reducing agent for slag cleaning furnace top-blown immersion blowing reduction | |
| CN101736112B (en) | Method for fusing and reducing iron from copper residue by blowing inert gas | |
| CN105018855B (en) | Method for producing circular sulfur-resistant pipeline steel billet for oil and gas collection and transmission | |
| CN105331804B (en) | The method of steel mill's dezincification stove coprocessing zinc leaching residue | |
| CN102864282B (en) | Recarburization method for semi-steel desulfurization | |
| CN104357650B (en) | A kind of bath smelting quickly makes molten bath method | |
| CN103614607A (en) | Method for preparing stainless steel raw materials through smelting reduction of hot copper slags under action of nickel-containing materials | |
| CN102041400B (en) | Process and equipment for producing high-content manganese silicon alloy from low-grade ferromanganese ore | |
| CN107513598B (en) | A kind of molten iron tank deck bottom composite blowing sulfur method | |
| CN104561452B (en) | Dust the device and method of single mouth vacuum deaeration refining molten steel at a kind of end | |
| CN204918713U (en) | A electroslag gas blowing device for electroslag | |
| CN102719728B (en) | Technique for producing anti-acid pipeline steel by RH-LF-VD refining | |
| CN104805300B (en) | A kind of method that cold conditions lead-rich slag is handled with warm sludge side-blown reduction stove | |
| CN102747235B (en) | Method for smelting and producing copper by spray gun adhering slag type Ausmelt furnace | |
| CN104109727B (en) | The method of half steel converter smelting Low-phosphorus Steel | |
| CN114990273B (en) | Oxygen-enriched side-blown jet smelting method and smelting device for high-phosphorus iron ore | |
| CN104451195A (en) | Flash smelting method for nickel laterite ores | |
| CN103993118B (en) | A kind of smelting process containing sefstromite | |
| CN106868310B (en) | A kind of drastic reduction copper slag method of eddy flow chaos nitrogen-blow and biomass fuel | |
| CN104862449A (en) | Control method of nitrogen in steel for saw web substrate | |
| CN202063976U (en) | Equipment for producing high manganese-silicon by low-grade ferromanganese ore | |
| CN203429234U (en) | Immersed blowing reduction system of depletion electric furnace | |
| CN104328245B (en) | A kind of method of producing S≤0.002% steel alloy without the refining of LF stove | |
| CN108660290A (en) | A kind of compound ar blowing refining device and method in Medium frequency induction furnace roof bottom | |
| CN102839255B (en) | Method for rapidly deoxidizing and remaining carbon by secondarily adding melted iron to electric furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |