CN1540000A - Pre fusion typed refining purifying agent and prducing technique - Google Patents
Pre fusion typed refining purifying agent and prducing technique Download PDFInfo
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- CN1540000A CN1540000A CNA2003101031051A CN200310103105A CN1540000A CN 1540000 A CN1540000 A CN 1540000A CN A2003101031051 A CNA2003101031051 A CN A2003101031051A CN 200310103105 A CN200310103105 A CN 200310103105A CN 1540000 A CN1540000 A CN 1540000A
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Abstract
A pre-molten cleaning agent for refining is prepared from bauxite, lime stone and fluorite through pulverizing, proportional mixing, preparing rectangular blocks, calcining at 1420+/-15 deg.C, pulverizing and screening. Its advantage is high desulfurizing efficiency.
Description
Technical field
The present invention relates to a kind of pre-molten refining scavenging agent, belong to the ladle refining scavenging agent, be mainly used in the LF stove.
The invention still further relates to the production technique of pre-molten refining scavenging agent.
Background technology
The scavenging agent of existing ladle refining, the product made from steel desulfurization degree is low, and at 55-60%, terminal point sulphur is 0.0055%, and the product water-intake rate is big, and easily the moisture absorption becomes powder, makes product lose function, causes transportation, storage cost higher.
Summary of the invention
Purpose of the present invention just for the shortcoming that overcomes above-mentioned prior art with not enough, but and a kind of both fritting, desulfurization are provided, the adsorbable again pre-molten refining scavenging agent that is mingled with, thus improve the quality of products.
The present invention also provides the production technique of pre-molten refining scavenging agent.
The objective of the invention is to realize by following technical proposal:
Pre-molten refining scavenging agent is characterized in that it is processed by the following weight proportion raw material:
Al
2O
3Content is greater than 87%, SiO
2Content is less than bauxitic clay 35-45 part of 3%,
CaO content is greater than 54%, SiO
2Content is less than Wingdale 50-60 part of 0.08%
CaF
2Content is greater than fluorite 3-5 part of 92%.
The production technique of pre-molten refining scavenging agent is characterized in that it is undertaken by following step:
A) with the Al of 35-45 part
2O
3Content is greater than 87%, SiO
2Content is less than 3% bauxitic clay, and the CaO content of 50-60 part is greater than 54%, SiO
2Content is less than 0.08% Wingdale, the CaF of 2-3 part
2Content is raw material greater than 92% fluorite;
B) according to a conventional method with raw material separated pulverizing to 180 order of (a) item,, make the rectangle bulk with friction press through batching;
C) insert then in the high temperature kiln of falling the cigarette, under 1420 ± 15 ℃ of temperature, be fired into 12CaO7Al
2O
3Crystal;
D) after pulverize other granular product of screening 1-30mm level.
Scavenging agent of the present invention, the raw material of selecting for use have strict requirement, through pulverizing, batching, moulding, sintering, generate the 12CaO7Al of xln
2O
3, be the product that easily floats, but cleaning molten steel.
The physical and chemical index of this product is:
SiO
24-6％、Al
2O
340-46％、CaO45-50％
MgO2-4%, CaF
22-4%, water ratio＜0.5%, fusing point＜1400 ℃.
Owing to take technique scheme to make the technology of the present invention compared with the prior art have following advantage and effect:
A) have very strong sweetening power, desulfurization degree height, final sulfur content reach below 0.003%, in molten steel sulfide and oxysulfide are reduced to minimum, do not produce back the sulphur phenomenon;
B) the shape slag is fast, and the slag good fluidity is difficult for the knot lid, further desulfurization behind the formation white slag, and can adsorb folder, and purify hot metal, the high low power quality scale of steel reduces by 0.5 grade, has improved quality product;
C) shorten tap to tap time, improved effect, reduced production cost;
D) pre-molten synthetic slag finished product is a particulate state, is difficult for the moisture absorption, is convenient to transportation;
E) processing method is simple, good product quality, and consumption is few.
Product of the present invention is all obtained good effect through too much family's use, and the result is as follows:
1, certain iron and steel group at a small amount of back of tapping disposable adding scavenging agent 5-6kg/ ton steel and lime in ladle, makes steel 169978 tons at LF stove refining steel, the desulfurization degree height, and the shape slag is fast, and absorption is mingled with, and slag fluidity is good, purify hot metal.
2, certain special steel company limited of group is with 30 tons of eccentric bottom tapping electric furnaces, add eight 100kg/ stove scavenging agents to ladle during test, desulfurization degree average out to of the eccentric end 82.32%, be up to 92.22%, the loose level of low multiple quality improves, reduce by 0.5 rank, the average rank of high power quality category-B inclusion also reduces by 0.5 grade.
3, certain special steel limited-liability company carries out expanding test with the LF stove,
Use scavenging agent 5kg/ ton steel of the present invention, particle diameter 1-30mm adds carbon reducing agent, add at 30 tons of electric furnace steel tapping 5 ton hours, the result shows that its sweetening effectiveness is good, and the synthesis desulfurating rate is 75%, finished product sulfur-bearing average out to 0.0014%, slagging speed is fast, easily form foamy slag, molten steel heating improves 2.4 ℃/min, and it is strong that absorption is mingled with ability, reduce cost 3.46 yuan/ton, Finished Steel oxygen string can reach 20ppm.
4, certain steel foundry tests with electrosmelting, adds 100-200Kg scavenging agent of the present invention on former smelting technology basis, adds refining furnace after skimming in the stokehold, 20 of random sampling, and its result is:
Average desulfurization degree reaches 72.1%, improve more than 12% than original desulfurization degree, finished product sulphur content average out to 0.0025%, refining furnace average tap to tap time is 115 minutes, shorten 15.6 minutes than original, sulphur content can reach 0.0015% before producing the tapping of OVD2 specialty 902 steel list stoves, and slag fluidity is good, is difficult for the knot lid, in smelting low alloy steel, can make the product sulphur content less than 0.010%, add scavenging agent and improve productive rate, increase economic benefit.
Embodiment
Embodiment 1
Get the Al of 35kg
2O
3Content is greater than 87%, SiO
2The bauxitic clay of content 3%, the CaO content 54% of 60kg, SiO
2The Wingdale of content 0.08%, the CaF of 3kg
2The fluorite of content 92% is a raw material, and separated pulverizing to 180 order is made the rectangle bulk through batching with friction press according to a conventional method, inserts then in the high temperature kiln of falling the cigarette, is fired into 12CaO7Al under 1420 ± 15 ℃ of temperature
2O
3Crystal. through crushing and screening 1-15mm, be scavenging agent of the present invention.
Embodiment 2
Get the Al of 40kg
2O
3Content is greater than 88%, SiO
2The bauxitic clay of content 2.5%, the CaO content 55% of 55kg, SiO
2The fluorite of the CaF content 93% of the Wingdale 2kg of content 0.07% is a raw material, separated pulverizing to 180 order according to a conventional method, make the rectangle bulk through batching with friction press, insert then in the high temperature kiln of falling the cigarette, under 1420 ± 15 ℃ of temperature, be fired into 12CaO7Al
2O
3Crystal through crushing and screening 1-20mm, is scavenging agent of the present invention.
Embodiment 3
Get the Al of 45kg
2O
3Content is greater than 89%, SiO
2The bauxitic clay of content 2.6%, the CaO content 56% of 50kg, SiO
2The fluorite of the CaF content 94% of the Wingdale 1kg of content 0.06% is a raw material, separated pulverizing to 180 order according to a conventional method, make the rectangle bulk through batching with friction press, insert then in the high temperature kiln of falling the cigarette, under 1420 ± 15 ℃ of temperature, be fired into 12CaO7Al
2O
3Crystal through crushing and screening 1-30mm, is scavenging agent of the present invention.
Claims (2)
1, a kind of pre-molten refining scavenging agent is characterized in that it is processed by the following weight proportion raw material:
Al
2O
3Content is greater than 87%, SiO
2Content is less than bauxitic clay 35-45 part of 3%
CaO content is greater than 54%, SiO
2Content is less than Wingdale 50-60 part of 0.08%
CaF
2Content is greater than fluorite 2-3 part of 92%.
2,, it is characterized in that it is undertaken by following step as the production technique of pre-molten refining scavenging agent according to claim 1:
A) with the Al of 35-45 part
2O
3Content is greater than 87%, SiO
2Content is less than 3% bauxitic clay, and the CaO content of 50-60 part is greater than 54%, SiO
2Content is less than 0.08% Wingdale, the CaF of 2-3 part
2Content is raw material greater than 92% fluorite;
B) according to a conventional method with raw material separated pulverizing to 180 order of (a) item,, make the rectangle bulk with friction press through batching;
C) insert then in the high temperature kiln of falling the cigarette, under 1420 ± 15 ℃ of temperature, be fired into 12CaO7Al
2O
3Crystal;
D) after pulverize other granular product of screening 1-30mm level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310103105 CN1219080C (en) | 2003-11-04 | 2003-11-04 | Pre fusion typed refining purifying agent and prducing technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310103105 CN1219080C (en) | 2003-11-04 | 2003-11-04 | Pre fusion typed refining purifying agent and prducing technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1540000A true CN1540000A (en) | 2004-10-27 |
| CN1219080C CN1219080C (en) | 2005-09-14 |
Family
ID=34333207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310103105 Expired - Fee Related CN1219080C (en) | 2003-11-04 | 2003-11-04 | Pre fusion typed refining purifying agent and prducing technique |
Country Status (1)
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| CN (1) | CN1219080C (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100465295C (en) * | 2006-11-24 | 2009-03-04 | 辽宁中兴矿业集团有限公司 | Boron composite fluxing agent for making steel |
| CN100552052C (en) * | 2008-07-11 | 2009-10-21 | 鞍钢股份有限公司 | The processing method of preparation fine oxide dispersion steel |
| CN100552053C (en) * | 2008-07-17 | 2009-10-21 | 鞍钢股份有限公司 | The preparation method of fine oxide dispersion steel |
| WO2009152643A1 (en) * | 2008-06-19 | 2009-12-23 | 鞍钢股份有限公司 | An additive used in secondary refining process, the producing method and the application thereof |
| CN101134987B (en) * | 2006-08-30 | 2010-05-12 | 宝山钢铁股份有限公司 | Desulfurizing agent for non-oriented silicon steel |
| CN101319269B (en) * | 2008-07-23 | 2010-09-08 | 鞍钢股份有限公司 | Technique for desulfurization in refining process |
| CN101323896B (en) * | 2008-07-31 | 2010-09-22 | 首钢总公司 | Refined-smelting ladle furnace carbon control deep desulphurization method for ultra-low-carbon steel production |
| CN101676410B (en) * | 2008-09-18 | 2011-06-29 | 宝山钢铁股份有限公司 | Aluminum slag, desulfurizer and desulfurizing method for desulfurization of high silicon molten iron |
| CN102296151A (en) * | 2011-08-22 | 2011-12-28 | 辽宁天和科技股份有限公司 | Pre-melted slag with composite structure |
| CN102787211A (en) * | 2012-06-28 | 2012-11-21 | 辽宁中汇环保科技有限公司 | Method for producing high-quality low-sulfur steel by using aluminium and calcium premelted refining slag |
| CN102787210A (en) * | 2012-06-28 | 2012-11-21 | 辽宁中汇环保科技有限公司 | Calcareous premelted composite deoxidation and desulfurization agent for low-cost steel-making and method for preparing same |
| CN102787213A (en) * | 2012-06-28 | 2012-11-21 | 辽宁中汇环保科技有限公司 | Aluminium-calcareous premelted refining slag for low-cost steel-making and method for preparing same |
| CN102876849A (en) * | 2012-06-28 | 2013-01-16 | 辽宁天和科技股份有限公司 | Calcium pressing refining slag for steel production and preparation method thereof |
-
2003
- 2003-11-04 CN CN 200310103105 patent/CN1219080C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101134987B (en) * | 2006-08-30 | 2010-05-12 | 宝山钢铁股份有限公司 | Desulfurizing agent for non-oriented silicon steel |
| CN100465295C (en) * | 2006-11-24 | 2009-03-04 | 辽宁中兴矿业集团有限公司 | Boron composite fluxing agent for making steel |
| WO2009152643A1 (en) * | 2008-06-19 | 2009-12-23 | 鞍钢股份有限公司 | An additive used in secondary refining process, the producing method and the application thereof |
| CN100552052C (en) * | 2008-07-11 | 2009-10-21 | 鞍钢股份有限公司 | The processing method of preparation fine oxide dispersion steel |
| CN100552053C (en) * | 2008-07-17 | 2009-10-21 | 鞍钢股份有限公司 | The preparation method of fine oxide dispersion steel |
| CN101319269B (en) * | 2008-07-23 | 2010-09-08 | 鞍钢股份有限公司 | Technique for desulfurization in refining process |
| CN101323896B (en) * | 2008-07-31 | 2010-09-22 | 首钢总公司 | Refined-smelting ladle furnace carbon control deep desulphurization method for ultra-low-carbon steel production |
| CN101676410B (en) * | 2008-09-18 | 2011-06-29 | 宝山钢铁股份有限公司 | Aluminum slag, desulfurizer and desulfurizing method for desulfurization of high silicon molten iron |
| CN102296151A (en) * | 2011-08-22 | 2011-12-28 | 辽宁天和科技股份有限公司 | Pre-melted slag with composite structure |
| CN102787211A (en) * | 2012-06-28 | 2012-11-21 | 辽宁中汇环保科技有限公司 | Method for producing high-quality low-sulfur steel by using aluminium and calcium premelted refining slag |
| CN102787210A (en) * | 2012-06-28 | 2012-11-21 | 辽宁中汇环保科技有限公司 | Calcareous premelted composite deoxidation and desulfurization agent for low-cost steel-making and method for preparing same |
| CN102787213A (en) * | 2012-06-28 | 2012-11-21 | 辽宁中汇环保科技有限公司 | Aluminium-calcareous premelted refining slag for low-cost steel-making and method for preparing same |
| CN102876849A (en) * | 2012-06-28 | 2013-01-16 | 辽宁天和科技股份有限公司 | Calcium pressing refining slag for steel production and preparation method thereof |
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|---|---|
| CN1219080C (en) | 2005-09-14 |
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