CN104726636A - Foaming agent for smelting stainless steel employing electric furnace and foaming method for foaming agent - Google Patents
Foaming agent for smelting stainless steel employing electric furnace and foaming method for foaming agent Download PDFInfo
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- CN104726636A CN104726636A CN201510143032.1A CN201510143032A CN104726636A CN 104726636 A CN104726636 A CN 104726636A CN 201510143032 A CN201510143032 A CN 201510143032A CN 104726636 A CN104726636 A CN 104726636A
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- electrosmelting
- whipping agent
- stainless steel
- foaming agent
- foaming
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Abstract
The invention relates to a foaming agent for smelting stainless steel employing an electric furnace and a foaming method for the foaming agent. The foaming agent is prepared by the following methods: (I) evenly stirring the following raw materials in parts by weight: 40+/-5 parts of limestone, 30+/-3 parts of oxide scale, 10 parts of coke powder and15+/-1 parts of cement into a blended material; II adding 20+/-2 parts of water to the blended material to form a mixture; III adding the mixture to a mold to fabricate a brick, and demolding to form a foaming agent block; and IV conserving the foaming agent block at 20+/-10 DEG C for at least three days. The foaming method comprises the following steps: melting a slag making material added to electric furnace smelting; adding the first batch of foaming agent block which is 0.5%-0.6% of mass of molten steel, foaming slag, and improving the power transmission power by 10%-30% to transmit power; and adding the second batch of foaming agent block which is 0.5%-0.6% of mass of molten steel. According to the foaming agent for smelting the stainless steel employing the electric furnace and the foaming method for the foaming agent, the power consumption and the refractory consumption are reduced when the stainless steel is smelted by the electric furnace.
Description
Technical field
The present invention relates to a kind of electrosmelting stainless steel whipping agent, and relate to this whipping agent at the stainless foaming method of electrosmelting.
Background technology
Electrosmelting carbon steel making foam slag technology is ripe, when electrosmelting carbon steel, making foamed slag can be utilized to power to realize long arc, and can alleviate the radiation of electric arc to resistance to material, can reduce power consumption, can reduce the cost of resistance to material again; But during due to electrosmelting stainless steel, in slag, make slag retrogradation containing a large amount of chromic oxide, strengthen gas making bubble submerged arc difficulty, therefore electrosmelting stainless steel there is no making foam slag technology at present.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of whipping agent realizing arc-covering slag operation reduction power consumption and refractory consumption when electrosmelting stainless steel.
Another object of the present invention is to provide this whipping agent at the stainless foaming method of electrosmelting.
For achieving the above object, the present invention takes following technical scheme: in electrosmelting process, adds whipping agent of the present invention, adjustable slag viscosity, and discharges gas, in slag, produce bubble, realizes the stainless arc-covering slag operation of electrosmelting.
Electrosmelting stainless steel whipping agent of the present invention is the whipping agent prepared by following step successively:
ibatching and batch mixing
Wingdale, iron scale, coke powder and cement are carried out batching by following mass parts and stirring and evenly mixing one-tenth mixing material:
Wingdale 40 ± 5; Iron scale 30 ± 3; Coke powder 10; Cement 15 ± 1;
Raw meal particle size is all less than 1mm;
iIwater distribution and stirring
In above mixing material, add the water of mass parts 20 ± 2, and be stirred into blended stock;
iIIagglomeration
Blended stock is added model and carry out brickmaking, and utilize vibrator to carry out vibration raising brick degree of compactness, after vibration terminates the rear demoulding, become whipping agent block;
iVmaintenance
The maintenance at 20 DEG C ± 10 DEG C of whipping agent block, curing time is no less than 3 days, general maintenance 3 days.
In order to ensure service requirements, the whipping agent block after maintenance, carries out strength test, is withstand voltagely not less than intensity 300N/mm
2.
This electrosmelting stainless steel whipping agent comprises electric furnace charging and electrosmelting at the foaming method of electrosmelting, it is characterized in that: after the slag material fusing added in electrosmelting, add first whipping agent block of the present invention, add-on is 0.5%-0.6% of steel quality, after slag foaming, the thick increase of slag, there is slag to overflow from fire door, can arc-covering slag operation be realized, improve power transmission power 10%-30% and carry out high-power power transmission, accelerate smelting speed, reduce power consumption and the raying degree to the resistance to material of furnace lining; After 6 ~ 10 minutes, then add second batch whipping agent block, add-on is 0.5%-0.6% of steel quality, continues to carry out high-power power transmission when liquid steel temperature reaches 1600 DEG C-1650 DEG C, tapping.
Further, the using method of above-mentioned whipping agent in electrosmelting is at electric furnace when filling with substance, and first electric furnace loads stainless steel steel scrap, high carbon ferro-chrome and nickelalloy material by electrosmelting stainless steel shove charge step (normal procedure);
Power transmission 2500KW-3250KW after charging, molten steel iron charge, after 1400 DEG C-1500 DEG C melting down, adds slag material lime 6000 ~ 6500kg, calcined magnesite ball 1000 ~ 1500kg.
Beneficial effect of the present invention
Add whipping agent of the present invention during electrosmelting stainless steel, realize arc-covering slag operation, reduce power consumption and refractory consumption.After foamy slag is formed, after achieving submerged arc, strengthen power transmission power, accelerate to smelt rhythm, meanwhile, in smelting process, shorten tap to tap time, reduce the radiation of electric arc to resistance to material, improve the resistance to material life-span.The present invention adopts different power transmission power, adds whipping agent block at different power transmission power, increases the thickness of slag, can keep high-power power transmission, improves power supplying efficiency, can contribute to the raying degree of molten steel insulation and the resistance to material of minimizing simultaneously.
Embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with embodiment, but the specific embodiment of the present invention is not limited to following embodiment.
whipping agent embodiment
the whipping agent of the present embodiment is the whipping agent prepared by following step successively
i, batching and batch mixing
Wingdale, iron scale, coke powder and cement are carried out batching by following mass parts and stirring and evenly mixing one-tenth mixing material:
Wingdale 40; Iron scale 30; Coke powder 10; Cement 15.
Raw meal particle size is all less than 1mm.
The quality of every part is 10000 kilograms.
iI, water distribution and stirring
In above mixing material, add the water of mass parts 20, and utilize agitator to be stirred into blended stock.
iII, agglomeration
The blended stock stirred above is added model and carries out brickmaking, and utilize vibrator to carry out vibration raising brick degree of compactness, vibration terminates the rear demoulding and becomes whipping agent block.
iV, maintenance
The maintenance at 20 DEG C ± 10 DEG C of whipping agent block, curing time is 3 days.
Through strength test, be withstand voltagely not less than 300N/mm
2.
In the present embodiment implementation process, a large amount of bubble can be produced in molten bath after adding whipping agent, make slag thickness be increased to 50mm by original 30mm, effectively increase the air bubble content in slag, add slag thickness, the effect of improve insulation in smelting process, shortening the heat.
foaming method embodiment
The present embodiment be above-mentioned whipping agent in 90 tons of electric furnaces, the stainless foaming method of electrosmelting, the present embodiment smelt be the stainless steel grade of 0Cr18Ni9
.
i, electric furnace charging
First in 90 tons of electric furnaces, shove charge enters stainless steel smelting raw material, stainless steel steel scrap 70000 kg, high carbon ferro-chrome 15000 kg, nickel plate 5000 kg.
iImelting
Power transmission 2500KW after charging, molten steel iron charge, after 1450 DEG C melting down, adds slag material lime 6000kg and calcined magnesite ball 1500kg.
iIImaking foamed slag
First whipping agent block 500kg is added after 1500 DEG C of slag material fusings; After slag foaming is thickening, can arc-covering slag operation be carried out, improve power transmission power to 3200KW, accelerate smelting speed; After first foaming agent foam terminates, then add second batch whipping agent block 500kg, continue to carry out high-power power transmission; Smelt the later stage, adjustment liquid steel temperature, to 1650 DEG C, is tapped.
The mass percent of the composition of molten steel is:
C 0.04; Si 0.5; Mn 1.00; S 0.020; P 0.020; Cr 17.00; Ni 8.00; All the other are Fe and inevitable impurity.
In the present embodiment implementation process, smelt the initial stage, after slag charge is melting down, adds whipping agent, in slag, produce a large amount of bubble, increase slag thickness, be increased to 300mm by original 150mm, can arc-covering slag operation be realized, carry out high-power power transmission, also reduce electric arc to the radiation of the resistance to material of furnace lining simultaneously; Smelt and add whipping agent mid-term, make slag thickness be increased to 600mm by original 300mm, high-power power transmission can be kept, improve power supplying efficiency, the raying degree of molten steel insulation and the resistance to material of minimizing can be contributed to simultaneously.On the whole, after electrosmelting scarfing cinder, smelting and add whipping agent and can increase slag thickness mid-term, powering for realizing long arc, arc-covering slag operation creates condition, improve the heat insulation effect of molten steel; Meanwhile, obviously reduce the raying degree of the resistance to material of furnace lining, shorten the electrosmelting time, improve electrosmelting efficiency.
Explanation
Slag material of the present invention is lime and calcined magnesite ball, and lime and calcined magnesite ball add respectively, and the mass ratio of lime and calcined magnesite ball is;
Lime 60 ~ 65, calcined magnesite ball 10 ~ 15.
Claims (6)
1. an electrosmelting stainless steel whipping agent, it is the whipping agent prepared by following step successively:
ibatching and batch mixing
Wingdale, iron scale, coke powder and cement are carried out batching by following mass parts and stirring and evenly mixing one-tenth mixing material:
Wingdale 40 ± 5; Iron scale 30 ± 3; Coke powder 10; Cement 15 ± 1;
Raw meal particle size is all less than 1mm;
iIwater distribution and stirring
In above mixing material, add the water of mass parts 20 ± 2, and be stirred into blended stock;
iIIagglomeration
Blended stock is added model and carry out brickmaking, and utilize vibrator to carry out vibration raising brick degree of compactness, after vibration terminates the rear demoulding, become whipping agent block;
iVmaintenance
The maintenance at 20 DEG C ± 10 DEG C of whipping agent block, curing time is no less than 3 days.
2. electrosmelting stainless steel whipping agent according to claim 1, is characterized in that: the whipping agent block after maintenance is through strength test, and compressive strength is not less than 300N/mm
2.
3. electrosmelting stainless steel whipping agent according to claim 1 is at the stainless foaming method of electrosmelting, comprise electric furnace charging and electrosmelting, it is characterized in that: after the slag material fusing added in electrosmelting, add first electrosmelting stainless steel whipping agent block, add-on is 0.5%-0.6% of steel quality, after slag foaming, and the thick increase of slag, carry out arc-covering slag operation, improve power transmission power 10%-30% and carry out power transmission; After 6 ~ 10 minutes, then add second batch electrosmelting stainless steel whipping agent block, add-on is 0.5%-0.6% of steel quality, and lasting power transmission, when liquid steel temperature reaches 1600 DEG C-1650 DEG C, is tapped.
4. electrosmelting stainless steel whipping agent according to claim 3 is at the stainless foaming method of electrosmelting, it is characterized in that: the compressive strength of described whipping agent block is not less than 300N/mm
2.
5. according to described electrosmelting stainless steel whipping agent arbitrary in claim 3 or 4 at the stainless foaming method of electrosmelting, it is characterized in that described slag material is lime and calcined magnesite ball, lime and calcined magnesite ball add respectively, the mass ratio of lime and calcined magnesite ball is: lime 60 ~ 65, calcined magnesite ball 10 ~ 15.
6. electrosmelting stainless steel whipping agent according to claim 5 is at the stainless foaming method of electrosmelting, it is characterized in that: at electric furnace when filling with substance, first presses electrosmelting stainless steel shove charge step and loads stainless steel steel scrap, high carbon ferro-chrome and nickelalloy material; Power transmission 2500KW-3250KW after charging, molten steel iron charge, after 1400 DEG C-1500 DEG C melting down, adds slag material lime 6000 ~ 6500kg, calcined magnesite ball 1000 ~ 1500kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510143032.1A CN104726636A (en) | 2015-03-30 | 2015-03-30 | Foaming agent for smelting stainless steel employing electric furnace and foaming method for foaming agent |
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| CN201510143032.1A CN104726636A (en) | 2015-03-30 | 2015-03-30 | Foaming agent for smelting stainless steel employing electric furnace and foaming method for foaming agent |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107354266A (en) * | 2017-07-28 | 2017-11-17 | 攀钢集团研究院有限公司 | Electric furnace smelting stainless steel foaming agent and its application method |
| CN107419056A (en) * | 2017-07-28 | 2017-12-01 | 攀钢集团研究院有限公司 | Stainless steel EAF foaming slag and its application method |
| CN108384919A (en) * | 2018-01-16 | 2018-08-10 | 朱荣 | A kind of foaming agent for smelting steel in electric arc furnace and its application method |
| CN109593904A (en) * | 2019-01-09 | 2019-04-09 | 张辰星 | A kind of environmental protection converter process for making |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101631879A (en) * | 2007-02-09 | 2010-01-20 | Sms西马格股份公司 | Method for the reduction of a slag having a high degree of chromium in an electric arc furnace |
| CN102061356A (en) * | 2003-05-24 | 2011-05-18 | Sms西马格股份公司 | Method for producing foamed slag on high-chromium melts in an electric furnace |
| CN102094107A (en) * | 2009-12-10 | 2011-06-15 | 宝山钢铁股份有限公司 | Foaming agent for stainless steel electric furnace |
| CN102719605A (en) * | 2011-03-30 | 2012-10-10 | 宝山钢铁股份有限公司 | Foamed ball for producing foam slag in process of stainless steel smelting by an electric arc furnace and a manufacture method thereof |
| CN103993131A (en) * | 2013-02-19 | 2014-08-20 | 宝山钢铁股份有限公司 | Method for making foamed slag during stainless steel electric furnace smelting |
-
2015
- 2015-03-30 CN CN201510143032.1A patent/CN104726636A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061356A (en) * | 2003-05-24 | 2011-05-18 | Sms西马格股份公司 | Method for producing foamed slag on high-chromium melts in an electric furnace |
| CN101631879A (en) * | 2007-02-09 | 2010-01-20 | Sms西马格股份公司 | Method for the reduction of a slag having a high degree of chromium in an electric arc furnace |
| CN102094107A (en) * | 2009-12-10 | 2011-06-15 | 宝山钢铁股份有限公司 | Foaming agent for stainless steel electric furnace |
| CN102719605A (en) * | 2011-03-30 | 2012-10-10 | 宝山钢铁股份有限公司 | Foamed ball for producing foam slag in process of stainless steel smelting by an electric arc furnace and a manufacture method thereof |
| CN103993131A (en) * | 2013-02-19 | 2014-08-20 | 宝山钢铁股份有限公司 | Method for making foamed slag during stainless steel electric furnace smelting |
Non-Patent Citations (2)
| Title |
|---|
| J.REICHEL ET AL: "EAF-foamy slag in stainless steel production new extremely efficient technology easy to handle and cost-efficient", 《ARCHIVES OF METALLURGY AND MATERIALS》 * |
| 徐迎铁 等: "电炉冶炼不锈钢的泡沫渣技术探讨", 《世界钢铁》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107354266A (en) * | 2017-07-28 | 2017-11-17 | 攀钢集团研究院有限公司 | Electric furnace smelting stainless steel foaming agent and its application method |
| CN107419056A (en) * | 2017-07-28 | 2017-12-01 | 攀钢集团研究院有限公司 | Stainless steel EAF foaming slag and its application method |
| CN108384919A (en) * | 2018-01-16 | 2018-08-10 | 朱荣 | A kind of foaming agent for smelting steel in electric arc furnace and its application method |
| CN109593904A (en) * | 2019-01-09 | 2019-04-09 | 张辰星 | A kind of environmental protection converter process for making |
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Application publication date: 20150624 |
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