CN102091779A - Carbon manganese balls and preparation method thereof and continuous casting smelting process for high or medium carbon steel converter - Google Patents
Carbon manganese balls and preparation method thereof and continuous casting smelting process for high or medium carbon steel converter Download PDFInfo
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Abstract
The invention discloses carbon manganese balls and a preparation method thereof and a continuous casting smelting process for a high or medium carbon steel converter, and belongs to the technical field of steelmaking. The invention aims to solve the problems of long melting time of common carburant, low carbon yield and difficult molten steel component control. The carbon manganese balls are prepared from the following raw materials in percentage by weight: 50 to 53 percent of high carbon ferromanganese powder, 40 to 43 percent of carbon powder, and 5 to 7 percent of bonding agent, wherein the high carbon ferromanganese powder contains 6 to 10 weight percent of carbon and 70 to 77 weight percent of manganese; the carbon powder contains more than or equal to 82 weight percent of carbon; the bonding agent is a bonding material and contains the following components in percentage by weight: 5 to 9 percent of polyanionic sodium cellulose, 63 to 67 percent of Guangxi white clay, 13 to 17 percent of dextrin, and 11 to 15 percent of sodium carbonate. The carbon manganese ball preparation method is simple, has short melting time and high yield of carbon and manganese, is easy to control the molten steel components, simplifies the steelmaking process, and saves energy.
Description
Technical field
The invention belongs to steelmaking technical field, be specifically related to a kind of carbon manganese ball and preparation method thereof and high, medium carbon steel converter-continuous casting smelting process.
Background technology
Along with the development of steel and iron industry, steel and iron industry has all proposed more and more higher requirement to the aspects such as cost of STEELMAKING PRODUCTION rate, steel.And present most of steel mill all adopts homlolgation technology to smelt high medium carbon steel, steel-making terminal point tapping carbon is controlled at below 0.10%, need to add a large amount of carburants (anthracite or petroleum coke carburant) in the tapping process and carry out carburetting, but because carburant light specific gravity, major part can be floated at molten steel surface in tapping process, cause not fusing fully of carburant, thereby had a strong impact on the control of carbon.The technology that domestic most of steel mill adopts has the carbon core-spun yarn of feeding, adds phosphorus-containing alloy or add carbon dust+LF stove slag refinery practice, carbon is controlled in the steel grade acceptable ranges, but the carbon recovery rate is lower and wayward in the above-mentioned technology, and production cost is higher, and the process processing time is long.
At present, for realizing optimization to the steel-making logistics, reduce production costs, converter-continuous casting short process production technology has obtained application study widely, in particularly high, the medium carbon steel smelting process, can directly enter the continuous-casting steel pouring operation after the pneumatic steelmaking, carry out carburetting but add common carburant, must adopt can make behind the LF stove slag refinery practice slag carbon fully, uniform dissolution is in molten steel.Adding common carburant, to carry out the recarburization process process processing time long, do not satisfy the short process production technology requirement, do not match with cycle of conticaster.
In order to satisfy the needs of steel and iron industry development, now be badly in need of a kind of melt very fast, the higher carburetting new material of carbon recovery rate, in order to replace anthracite carburant or petroleum coke carburant, solve tapping carburetting process carburant fusing inequality in the short flow process low-cost production of converter-continuous casting better, processing time is long, the not high and uppity problem of carbon recovery rate.
Summary of the invention
Technical problem to be solved by this invention is to overcome deficiency of the prior art, and a kind of carbon manganese ball and preparation method thereof and high, medium carbon steel converter-continuous casting smelting process are provided.
First technical problem to be solved by this invention provides a kind of carbon manganese ball, and this carbon manganese ball is made by following materials of weight proportions: high carbon ferromanganese powder 50～53%, carbon dust 40～43%, bond 5～7%; Wherein, described high carbon ferromanganese powder is carbon containing 6～10%, manganese 70～77% by weight, described carbon dust is carbon containing 〉=82% by weight, described bond is a binding material, contains polyanion cellulose sodium 5～9%, Guangxi white clay 63～67%, dextrin 13～17%, sodium carbonate 11～15% by weight; Described Guangxi white clay is trioxygen-containingization two aluminium 25～35% by weight, silica 40～55%.
Described polyanion cellulose sodium is white powder, granularity-200 order, purity 〉=90%, polyanion cellulose is called for short PAC, it is the water-soluble cellulose ether analog derivative that makes through chemical modification by native cellulose, be a kind of important water-soluble cellulose ether, use its sodium salt usually, be i.e. polyanion cellulose sodium.
The described dextrin catabolite that to be starch obtain through enzyme process or chemical method hydrolysis, for several to the oligosaccharides of dozens of glucose unit and the mixture of glycan.
Wherein, the granularity of above-mentioned carbon manganese ball is 5～15mm.
Wherein, above-mentioned carbon manganese ball contained humidity≤1% by weight.
Second technical problem to be solved by this invention provides the preparation method of carbon manganese ball.
A kind of preparation method of carbon manganese ball comprises the steps:
A, by weight ratio high carbon ferromanganese powder 50～53%, carbon dust 40～43%, bond 5～7% are mixed; Wherein, described high carbon ferromanganese powder is carbon containing 6～10%, manganese 70～77% by weight, described carbon dust is carbon containing 〉=82% by weight, described bond is a binding material, contains polyanion cellulose sodium 5～9%, Guangxi white clay 63～67%, dextrin 13～17%, sodium carbonate 11～15% by weight; Described Guangxi white clay is trioxygen-containingization two aluminium 25～35% by weight, silica 40～55%.
B, add water and stir and be pressed into pelletizing mixing the back material among the step a;
C, pelletizing make carbon manganese ball after drying.
Wherein, the granularity of pelletizing described in the said method step b is 5～15mm.
Wherein, the ball of carbon manganese described in said method step c contained humidity≤1% by weight.
Wherein, drying means is earlier pelletizing to be stacked naturally to send into vertical drying oven behind drying 24～48h and carry out drying among the said method step c, vertical kiln dried temperature be controlled at 200～250 ℃, drying time 1h.
The 3rd technical problem that the present invention solves provides a kind of high, medium carbon steel converter-continuous casting smelting process.
High, medium carbon steel converter-continuous casting smelting process: adopt homlolgation to smelt high, medium carbon steel, use claim 1,2 or 3 described carbon manganese balls as carburant in the converter steelmaking process, molten steel per ton adds carbon manganese ball 9.02～12.4kg in the converter smelting tapping process, directly enter the continuous-casting steel pouring operation after the pneumatic steelmaking, do not carry out LF stove slag refinery practice step workization slag and handle.
Carbon manganese ball of the present invention has solved carburant, and fusing time is long in process of production, the carbon recovery rate is low, molten steel composition control is difficult, thereby the problem and the carburant that influence steel quality need LF stove refining slag, the problem that has increased the time and increased the required power consumption of steel per ton after use.Carbon manganese ball preparation method of the present invention is simple, and in use the thawing time is short, (the average recovery rate of carbon can reach 93% for carbon, manganese yield height, the average recovery rate of manganese can reach 92.04%), molten steel composition is controlled easily, simplify process for making (not needing LF stove slag refinery practice workization slag to handle after adding carbon manganese ball of the present invention), energy savings.
The specific embodiment
Carbon manganese ball of the present invention, implement in the following manner:
A kind of carbon manganese ball is made by following materials of weight proportions: high carbon ferromanganese powder 50～53%, carbon dust 40～43%, bond 5～7%; Wherein, described high carbon ferromanganese powder is carbon containing 6～10%, manganese 70～77% by weight, described carbon dust is carbon containing 〉=82% by weight, described bond is a binding material, contains polyanion cellulose sodium 5～9%, Guangxi white clay 63～67%, dextrin 13～17%, sodium carbonate 11～15% by weight; Described Guangxi white clay is trioxygen-containingization two aluminium 25～35% by weight, silica 40～55%.
The high carbon ferromanganese powder is too much, can cause balling-up bad, crosses to hang down its alloying of manganese effect is not reached; The carbon dust consumption is too much, can cause in the use dust many, influences the recovery rate of carbon, crosses and does not reach the carburetting requirement at least; The effect that bond adds is to guarantee that high carbon ferromanganese powder, carbon dust mix the compacting balling-up.Because the too high danger that will blast of moisture in use of carbon manganese ball, so the present invention makes steel and need control moisture≤1% with carbon manganese ball.
Carbon manganese ball control granularity of the present invention is between 5～15mm.The present invention is by the shape (sphere) of control product and the granularity that suits (5～15mm) and with addition of certain high carbon ferromanganese powder, the proportion of carbon manganese ball is increased, so just can avoid existing carburant to swim in molten steel surface after the adding and uneven, the uppity problem of carbon of carburant fusing in tapping carburetting process.
It is as follows that carbon manganese ball system of the present invention is equipped with process:
A, by weight ratio will: high carbon ferromanganese powder 50～53%, carbon dust 40～43%, bond 5～7% carry out weighing; Wherein, described high carbon ferromanganese powder is carbon containing 6～10%, manganese 70～77% by weight, described carbon dust is carbon containing 〉=82% by weight, described bond is a binding material, contains polyanion cellulose sodium 5～9%, Guangxi white clay 63～67%, dextrin 13～17%, sodium carbonate 11～15% by weight; Described Guangxi white clay is trioxygen-containingization two aluminium 25～35% by weight, silica 40～55%.
B, load weighted high carbon ferromanganese powder, carbon dust sent in the batch mixing mixer successively mix stirring, after mixing mixing time 2min, add bond and continue to mix stirring 2min, add water by 6～7% of raw material high carbon ferromanganese powder, carbon dust and bond gross weight again and stir.Total mixing time is controlled at 4～5min and can mixes, and can not cause the stirring activity duration long again, influences process rhythm.
C, the raw material that stirs is conveyed into by belt is pressed into the ellipse pelletizing that specification is 5～15mm in the LYQ3.0 ball press.
D, the pelletizing that is pressed into is stacked dry 24～48 hours (wanting waterproof, sun-proof) naturally, product strength is further improved.
E, stack dried carbon manganese ball naturally and deliver to the vertical drying oven of JX2000-V10 again and carry out drying, baking temperature 200～250 ℃, drying time 1h.
Behind f, the carbon manganese ball warp kiln dried, stacking is cooled to normal temperature naturally, its contained humidity≤1%, and it is standby that sampling detects the qualified dress bag of physical and chemical index.
High, medium carbon steel converter-continuous casting smelting process: adopt homlolgation to smelt high, medium carbon steel, use claim 1,2 or 3 described carbon manganese balls as carburant in the converter steelmaking process, molten steel per ton adds carbon manganese ball 9.02～12.4kg in the converter smelting tapping process, directly enter the continuous-casting steel pouring operation after the pneumatic steelmaking, do not carry out LF stove slag refinery practice step workization slag and handle.
The invention will be further described below in conjunction with embodiment, but therefore do not limit the present invention among the described scope of embodiments.
The high carbon ferromanganese powder that is adopted in following embodiment, carbon dust raw material physical and chemical index detection case see Table 1.
Table 1 material chemical component detection case
The technical indicator of bond among the embodiment: white powder, granularity-200 order contains polyanion cellulose sodium 7%, Guangxi white clay 65%, dextrin 15%, sodium carbonate 13% by weight.
Wherein, Guangxi white clay (claiming fire clay or kaolin again) technical indicator: Al
2O
325～35%, SiO
240～55%, granularity-250 order, moisture≤0.5, rank: superfine, contain mineral material Co., Ltd of Tang by the Fu Sui county and produce.Described polyanion cellulose sodium: white powder, granularity-200 order, purity＞90%.
Described polyanion cellulose sodium, dextrin, sodium carbonate market are all on sale.
Raw material high carbon ferromanganese powder and carbon dust granularity are less than 2mm among the embodiment.
The preparation and the use of embodiment 1 carbon manganese ball of the present invention
Earlier by weight ratio commercially available polyanion cellulose sodium 7%, Guangxi white clay 65%, commercially available dextrin 15%, commercially available sodium carbonate 13% are mixed and makes bond, again after the bond weighing with the carbon dust of the high carbon ferromanganese powder of 50 weight portions, 43 weight portions and 7 weight portions, load weighted high carbon ferromanganese powder, carbon dust sent into respectively in the batch mixing mixer mix stirring, after mixing mixing time 2min, add bond and continue to mix stirring 2min, add water by 6% of raw material high carbon ferromanganese powder, carbon dust and bond weight again and stir.The material of mixing sent in the LYQ3.0 ball press suppress, be pressed into the ellipse carbon manganese pelletizing of 5～15mm.Be deposited in then in the factory building vacant lot, air dry was sent carbon manganese ball to JX2000-V10 vertical drying oven and is carried out drying after 48 hours, and baking temperature is controlled between 200～220 ℃, drying time 1h, carbon manganese pelletizing is come out of the stove, and measures dry back moisture 0.5%.Carbon manganese pelletizing after coming out of the stove is cooled in the woven bag of packing into behind the natural temperature, sampling detects the physical and chemical index (testing result sees Table 2) of carbon manganese ball, detect and be transported to the steelwork converter feed bin again after qualified and use, it is high to adopt homlolgation to smelt, medium carbon steel, use present embodiment carbon manganese ball as carburant in the converter steelmaking process, addition is 1200～1650kg/ stove (9.02～12.4kg/ ton molten steel), thawing time is 20～30 seconds, directly enter the continuous-casting steel pouring operation after the pneumatic steelmaking, do not carry out LF stove slag refinery practice step workization slag and handle, use data to see table 3 and table 4 for details.
The preparation and the use of embodiment 2 carbon manganese balls of the present invention
Earlier by weight ratio commercially available polyanion cellulose sodium 7%, Guangxi white clay 65%, commercially available dextrin 15%, commercially available sodium carbonate 13% are mixed and makes bond, again after the bond weighing with the carbon dust of the high carbon ferromanganese powder of 53 weight portions, 40 weight portions and 7 weight portions, high carbon ferromanganese powder, carbon dust sent into respectively in the batch mixing mixer mix stirring, after mixing mixing time 2min, add bond and continue to mix stirring 2min, add water by 7% of raw material high carbon ferromanganese powder, carbon dust and bond weight again and stir.The material of mixing sent in the LYQ3.0 ball press suppress, be pressed into the ellipse carbon manganese pelletizing of 5～15mm.Be deposited in then in the factory building vacant lot, air dry was sent carbon manganese ball to JX2000-V10 vertical drying oven and is carried out drying after 48 hours, and baking temperature is controlled between 200～220 ℃, drying time 1h, carbon manganese pelletizing is come out of the stove, and measures dry back moisture 0.5%.Carbon manganese pelletizing after coming out of the stove is cooled in the woven bag of packing into behind the natural temperature, sampling detects the physical and chemical index (testing result sees Table 2) of carbon manganese ball, detect and be transported to the steelwork converter feed bin again after qualified and use, it is high to adopt homlolgation to smelt, medium carbon steel, use present embodiment carbon manganese ball as carburant in the converter steelmaking process, addition is 1200～1650kg/ stove (9.02～12.4kg/ ton molten steel), thawing time is 25～40 seconds, directly enter the continuous-casting steel pouring operation after the pneumatic steelmaking, do not carry out LF stove slag refinery practice step workization slag and handle, use data to see table 3 and table 4 for details.
The preparation and the use of embodiment 3 carbon manganese balls of the present invention
Earlier by weight ratio commercially available polyanion cellulose sodium 7%, Guangxi white clay 65%, commercially available dextrin 15%, commercially available sodium carbonate 13% are mixed and makes bond, again after the bond weighing with the carbon dust of the high carbon ferromanganese powder of 52 weight portions, 43 weight portions and 5 weight portions, high carbon ferromanganese powder, carbon dust sent into respectively in the batch mixing mixer mix stirring, after mixing mixing time 2min, add bond and continue to mix stirring 2min, add water by 6% of raw material high carbon ferromanganese powder, carbon dust and bond weight again and stir.The material of mixing sent in the LYQ3.0 ball press suppress, be pressed into the ellipse carbon manganese pelletizing of 5mm～15mm.Be deposited in then in the factory building vacant lot, air dry was sent carbon manganese ball to JX2000-V10 vertical drying oven and is carried out drying after 48 hours, and baking temperature is controlled between 200～220 ℃, drying time 1h, carbon manganese pelletizing is come out of the stove, and measures dry back moisture 0.5%.Carbon manganese pelletizing after coming out of the stove is cooled in the woven bag of packing into behind the natural temperature, sampling detects the physical and chemical index (testing result sees Table 2) of carbon manganese ball, detect and be transported to the steelwork converter feed bin again after qualified and use, it is high to adopt homlolgation to smelt, medium carbon steel, use present embodiment carbon manganese ball as carburant in the converter steelmaking process, addition is 1200～1650kg/ stove (9.02～12.4kg/ ton molten steel), thawing time is 25～35 seconds, directly enter the continuous-casting steel pouring operation after the pneumatic steelmaking, do not carry out LF stove slag refinery practice step workization slag and handle, use data to see table 3 and table 4 for details.
The result of use of carbon manganese ball of the present invention among anthracite carburant and the embodiment 1～3
Embodiment 1～3 medium carbon manganese ball is applied to the steelmaking converter operation, and smelting steel grade is 45
#Steel, 50
#Steel, S48C steel.The recovery rate of carbon sees Table 3 behind the use carbon manganese ball, and the recovery rate of manganese sees Table 4.The carbon when steelmaking converter operation adopts the anthracite carburant and the recovery rate of manganese see Table 5, and need LF stove slag refinery practice workization slag to handle after adding the anthracite carburant.
Table 2 physical and chemical index detects
The recovery rate of carbon when table 3 uses carbon manganese ball of the present invention
The recovery rate of manganese when table 4 uses carbon manganese ball of the present invention
Table 5 uses the carbon and the manganese yield of anthracite carburant
Can clearly find out according to data in table 3, table 4, the table 5:
Using carbon manganese ball is 89.96% in the average recovery rate of chain-wales carbon, and is 81.21% with the anthracite carburant in the average recovery rate of chain-wales, and the carbon recovery rate has improved 8.75 percentage points; Using carbon manganese ball is 93.5% in the intact average recovery rate of slag (LF arrives at a station) carbon of LFization, is 87.8% and finish the average recovery rate of slag carbon with the anthracite carburant in LFization, and the carbon recovery rate has improved 5.7 percentage points.
Using carbon manganese ball is 88.4% in the average recovery rate of chain-wales manganese, and is 86.4% with the anthracite carburant in the average recovery rate of chain-wales manganese, and manganese yield has improved 2 percentage points; Using carbon manganese ball is 92.04% in the intact average recovery rate of slag (LF arrives at a station) manganese of LFization, is 89.6% and finish the average recovery rate of slag manganese with the anthracite carburant in LFization, and manganese yield has improved 2.44 percentage points.
Can draw to draw a conclusion according to the content among background technology and the embodiment: carbon manganese ball of the present invention has solved existing carburant, and fusing time is long in process of production, the power consumption height, and the carbon recovery rate is low, and molten steel composition control is difficult, thereby influences the problem of steel quality.And carbon manganese ball preparation of the present invention and using method are simple, and in use the thawing time is lacked (average 30 seconds), carbon, manganese yield height, and do not need LF stove slag refinery practice to be for further processing after adding carbon manganese ball, simplify process for making, energy savings has a extensive future.
Claims (8)
1. a carbon manganese ball is characterized in that being made by following materials of weight proportions: high carbon ferromanganese powder 50～53%, carbon dust 40～43%, bond 5～7%; Wherein, described high carbon ferromanganese powder is carbon containing 6～10%, manganese 70～77% by weight, described carbon dust is carbon containing 〉=82% by weight, described bond is a binding material, contains polyanion cellulose sodium 5～9%, Guangxi white clay 63～67%, dextrin 13～17%, sodium carbonate 11～15% by weight; Described Guangxi white clay is trioxygen-containingization two aluminium 25～35% by weight, silica 40～55%.
2. carbon manganese ball according to claim 1 is characterized in that: the granularity of described carbon manganese ball is 5～15mm.
3. carbon manganese ball according to claim 1 is characterized in that: described carbon manganese ball is contained humidity≤1% by weight.
4. the preparation method of a carbon manganese ball is characterized in that comprising the steps:
A, by weight ratio high carbon ferromanganese powder 50～53%, carbon dust 40～43%, bond 5～7% are mixed; Wherein, described high carbon ferromanganese powder is carbon containing 6～10%, manganese 70～77% by weight, described carbon dust is carbon containing 〉=82% by weight, described bond is a binding material, contains polyanion cellulose sodium 5～9%, Guangxi white clay 63～67%, dextrin 13～17%, sodium carbonate 11～15% by weight; Described Guangxi white clay is trioxygen-containingization two aluminium 25～35% by weight, silica 40～55%;
B, add water and stir and be pressed into pelletizing mixing the back material among the step a;
C, pelletizing make carbon manganese ball after drying.
5. the preparation method of carbon manganese ball according to claim 4 is characterized in that: the granularity of pelletizing described in the step b is 5～15mm.
6. the preparation method of carbon manganese ball according to claim 4 is characterized in that: the manganese of carbon described in step c ball is contained humidity≤1% by weight.
7. the preparation method of carbon manganese ball according to claim 4, it is characterized in that: drying means is earlier pelletizing to be stacked naturally to send into vertical drying oven behind drying 24～48h and carry out drying among the step c, vertical kiln dried temperature be controlled at 200～250 ℃, drying time 1h.
8. high, medium carbon steel converter-continuous casting smelting process, it is characterized in that: adopt homlolgation to smelt high, medium carbon steel, use claim 1,2 or 3 described carbon manganese balls as carburant in the converter steelmaking process, molten steel per ton adds carbon manganese ball 9.02～12.4kg in the converter smelting tapping process, directly enter the continuous-casting steel pouring operation after the pneumatic steelmaking, do not carry out LF stove slag refinery practice step workization slag and handle.
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| CN102266941A (en) * | 2011-08-09 | 2011-12-07 | 吴庆定 | High-efficiency and energy-saving low-carbon manganese ball production process |
| CN102266928A (en) * | 2011-08-16 | 2011-12-07 | 秦皇岛首秦金属材料有限公司 | Method for matching low-speed pouring of ultra-thick plate blank with consumption of continuous casting powder |
| CN103160634A (en) * | 2011-12-19 | 2013-06-19 | 攀钢集团攀枝花钢钒有限公司 | Steel-making method and application thereof and continuous casting method |
| CN103555936A (en) * | 2013-11-19 | 2014-02-05 | 攀枝花钢城集团有限公司 | Cold-pressing block for steelmaking as well as preparation method thereof |
| CN106435086A (en) * | 2016-11-17 | 2017-02-22 | 孙榕远 | Semisteel steelmaking recarburization slag melting agent and application method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102266941A (en) * | 2011-08-09 | 2011-12-07 | 吴庆定 | High-efficiency and energy-saving low-carbon manganese ball production process |
| CN102266928A (en) * | 2011-08-16 | 2011-12-07 | 秦皇岛首秦金属材料有限公司 | Method for matching low-speed pouring of ultra-thick plate blank with consumption of continuous casting powder |
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| CN103555936A (en) * | 2013-11-19 | 2014-02-05 | 攀枝花钢城集团有限公司 | Cold-pressing block for steelmaking as well as preparation method thereof |
| CN106435086A (en) * | 2016-11-17 | 2017-02-22 | 孙榕远 | Semisteel steelmaking recarburization slag melting agent and application method thereof |
| CN106435086B (en) * | 2016-11-17 | 2018-04-24 | 孙榕远 | A kind of semi-steel making carburetting slagging agent and its application method |
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