CN102796870B - Method for quickly proportioning in process of smelting medium-low-carbon ferromanganese alloy by using 15m<3> large-scale pre-smelting device - Google Patents

Method for quickly proportioning in process of smelting medium-low-carbon ferromanganese alloy by using 15m<3> large-scale pre-smelting device Download PDF

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CN102796870B
CN102796870B CN201210313044.0A CN201210313044A CN102796870B CN 102796870 B CN102796870 B CN 102796870B CN 201210313044 A CN201210313044 A CN 201210313044A CN 102796870 B CN102796870 B CN 102796870B
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齐牧
崔传海
孙继斌
郑中巍
项东
李杨
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CITIC Jinzhou Metal Co Ltd
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Abstract

The invention relates to a method for quickly proportioning in process of smelting medium-low-carbon ferromanganese alloy by using a 15m<3> large-scale pre-smelting device. The proportion of manganese ore is that the pre-smelted manganese-silicon alloy comprises b percent of silicon; the mixed manganese ore comprises Mn-ore percent of manganese and Fe-ore percent of iron; in the manganese-silicon alloy, the mass A of the silicon subjected to reduction reaction is equal to (0.212*Mn-ore+0.237.Fe-ore); the mass B of the pre-smelted manganese-silicon alloy is equal to (28.2*Mn-ore+31.5*Fe-ore)/b; the batch number N of the mixed manganese ore is equal to 100G*b/(28.2*Mn-ore+31.5*Fe-ore). The proportion of the iron ore is that: judging whether Mn-actual ore/Fe-actual ore is less than Mn-alloy/Fe-alloy or not; if Mn-actual ore/Fe-actual ore is less than Mn-alloy/Fe-alloy, exchanging high-grade ferromanganese and recalculating the value of Mn-alloy/Fe-alloy and judging; if Mn-actual ore/Fe-actual ore is not less than Mn-alloy/Fe-alloy, continuously judging; if Mn-actual ore/Fe-actual ore is equal to Mn-alloy/Fe-alloy, not adding iron ore and directly smelting; and if Mn-actual ore/Fe-actual ore is more than Mn-alloy/Fe-alloy, adding iron ore, wherein the proportion of the iron ore is Ykg and Y is equal to Mn-actual ore Fe-alloy/(Mn-alloy - Fe-actual ore). The proportioning method is quick, accurate and simple; the proportion of the manganese ore and the iron ore can be accurately controlled; each index is optimized; and production cost is reduced.

Description

Utilize 15m 3during large-scale pre-refining device is smelted, the low carbon ferromanganese alloy method of batching fast
Technical field
The present invention relates to a kind of cooperation 15m 3large-scale pre-refining device produce in, the low carbon ferromanganese alloy method of batching fast.
Background technology
The method of at present, producing medium-low carbon ferromanganese alloy be the liquid manganese-silicon that utilizes to be gone out by mine heat furnace smelting and in manganese shake front slag and mix and pack 15m into 3in large-scale pre-refining device, refine in advance, then pour manganese-silicon after refining in advance into electric refining furnaces and continue to react with the manganese ore (manganese ore, iron ore and lime) that mixes of allocating in stove, until smelt qualified in, low carbon ferromanganese alloy.
During production, the control of manganese ore, the iron ore amount of allocating into need to be according to Calculation of chemical equilibrium, calculation of complex, and calculated amount is large; But also to consider to refine in advance step in pre-refining device, calculate content more loaded down with trivial details, operator's chemistry and mathematics standard are had relatively high expectations, once calculate, make a mistake, the manganese ore that causes allocating into and iron ore is too much or very few, finally cause the rising of ore deposit consumption or the increase of melting electric consumption, even produce unacceptable product, extremely unfavorable to producing.
Summary of the invention
The invention provides a kind of 15m of utilization 3during large-scale pre-refining device is smelted, the low carbon ferromanganese alloy method of batching fast, the method fast, accurately, succinct, manganese ore and the iron ore amount of allocating into can accurately be controlled, and optimize indices, reduce production costs.
Technical solution of the present invention is:
A kind of 15m that utilizes 3the method that large-scale pre-refining device refines in smelting, low carbon ferromanganese alloy is prepared burden fast, its special character is:
The refining furnace manganese ore amount of allocating into:
Before pre-refining, detection manganese-silicon quality, manganese content, silicon content are counted respectively G t, L%, a%, detect the manganese-silicon silicon content of refining in advance and count b% after pre-refining; Mixing the every 100kg of manganese ore is 1 batch of material, mixes manganese ore manganese content and counts Mn ore deposit%, iron-holder are counted Fe ore deposit%;
Every batch of siliceous amount of mixing to participate in reduction reaction in the manganese-silicon that manganese ore allocates into is counted Akg, A=0.212 Mn ore deposit+ 0.237 Fe ore deposit;
Every batch of manganese-silicon quality of mixing the pre-refining that manganese ore allocates into is counted Bkg, B=(28.2 Mn ore deposit+ 31.5 Fe ore deposit)/b;
Required mixing manganese ore charge number is counted N, N=100G * b/(28.2 Mn ore deposit+ 31.5 Fe ore deposit);
The refining furnace iron ore amount of allocating into
Manganese content in the different varieties that will smelt, in low carbon ferromanganese alloy, silicon content, carbon content are counted respectively Mn in%, Si in%, C in%, actual measurement mixes manganese content, the iron-holder of manganese ore and counts respectively Mn actual ore deposit%, Fe actual ore deposit%, after pre-refining, manganese-silicon manganese content, iron-holder are counted respectively Mn after pre-refining%, Fe after pre-refining%, every batch is mixed the quality that manganese ore enters manganese element in manganese-silicon, ferro element after pre-refining and refining and counts respectively Mn alloykg, Fe alloykg, definition coefficient k, C, D, E;
k＝（1+2.93 a%）/(1+2.93 b%)；
Mn after pre-refining%=(L%+3.93 (a%-k * b%))/k;
Mn alloy=0.3 Mn ore deposit+ 1.33 A * Mn after pre-refining/ b, Fe alloy=0.95 Fe ore deposit+ 1.33 A * Fe after pre-refining/ b;
C=Mn after pre-refining/ b;
D=Fe after pre-refining/ b;
E={ 1-(Mn in%+Si in%+C in%) }/Mn in%;
Mn alloy/ Fe alloy=(0.315 C * E-0.315 D-0.95)/(0.282 D-0.282 C * E-0.3 E);
Calculate Mn actual ore deposit/ Fe actual ore depositvalue, judgement Mn actual ore deposit/ Fe actual ore depositwith Mn alloy/ Fe alloymagnitude relationship;
Judgement Mn actual ore deposit/ Fe whether actual ore depositbe less than Mn alloy/ Fe alloy, when being less than, change high-grade manganese ore, recalculate Mn alloy/ Fe alloyvalue, judgement Mn actual ore deposit/ Fe actual ore depositwith Mn alloy/ Fe alloymagnitude relationship;
When being not less than, continue judgement Mn actual ore deposit/ Fe whether actual ore depositequal Mn alloy/ Fe alloy, when equaling, not additional iron ore, directly smelts; Work as Mn actual ore deposit/ Fe actual ore deposit> Mn alloy/ Fe alloy, adding iron ore, the iron ore amount of allocating into is Ykg, Y=Mn actual ore depositfe alloy/ Mn alloy-Fe actual ore deposit.
Utilize 15m 3in large-scale pre-refining device refining smelting, the technical process of low carbon ferromanganese alloy as shown in Figure 1:
One, the actual manganese ore amount of allocating into
1, manganese-silicon carries out pre-refining reaction in pre-refining device
The reaction of pre-refining link is:
Si + 2MnO=2Mn+SiO 2
28 110
110:28=3.93:1
From above formula, often take off the silicon of 1 unit weight value, it is 3.93 weight unit that manganese-silicon increases manganese amount, manganese-silicon weightening finish is 2.93 weight unit;
Before pre-refining, manganese-silicon is weighed as G t, and after pre-refining, manganese-silicon is weighed as X t, and after testing, before refining, manganese-silicon silicon content is that a%, manganese content are L% in advance, and the rear manganese-silicon of pre-refining is siliceous is b%, according to above-mentioned reaction equation, has equation:
X =G +2.93 (G×a%-X×b%) （1）
If k=(1+2.93 is a%)/(1+2.93 b%), obtain X=k * G,
If manganese-silicon manganese content is Mn after pre-refining after pre-refining%, has equation according to above-mentioned reaction equation:
Mn after pre-refining%=(L%+3.93 (a%-k * b%))/k.
2, after pre-refining, manganese-silicon carries out purifying reaction in refining furnace
If add mixing manganese ore composition in stove: manganese content is Mn ore deposit%, iron-holder are Fe ore deposit%;
Illustrate: mix manganese ore (100kg) when refining furnace purifying reaction, mix the Mn in manganese ore ore deposit30% enters alloy, 20% volatilization, Fe ore deposit95% enters alloy, and the utilization ratio of silicon gets 75%;
Refining reaction in furnace:
2MnO 2=Mn 2O 3+1/2O 2↑ 570℃ （2）
3Mn 2O 3=2Mn 3O 4+1/2 O 2↑ 900℃ （3）
Manganese ore is mainly with MnO 2form exists, MnO in (2), (3) formula 2and Mn 2o 3all do not need reductive agent, at high temperature can decompose MnO 2be converted to Mn 3o 4quality be 100 * Mn ore deposit% * 229 ÷ 165=1.388 Mn ore deposit
Mn 3O 4+ Si = 3MnO+CO↑ （4）
458 28 426
1.388 Mn ore depositx1 Y
1. reduce Mn 3o 4the siliceous amount of need be: X1=1.388 * Mn ore deposit* 28 ÷ 458=0.0849 Mn ore deposit,
Mn 3o 4the MnO quality that is reduced production is: Y=1.388 * Mn ore deposit* 426 ÷ 458=1.291 Mn ore deposit,
The MnO quality of participating in reaction is 1.291 * Mn ore deposit* (20%+30%)=0.6445 Mn ore deposit, all the other enter slag;
2MnO + Si= 2Mn+SiO 2 （5）
142 28
0.6445Mn ore depositx2
2. the siliceous amount of need of MnO of reducing is: X2=0.6445Mn ore deposit* 28/142=0.1273 Mn ore deposit,
The FeO quality of participating in reaction is: 100 * Fe ore deposit% * 72 ÷ 56 * 95%=1.221 Fe ore deposit, all the other enter slag;
2FeO + Si= 2Fe+SiO 2 （6）
144 28
1.221 Fe ore depositx3
3. the siliceous amount of need of FeO of reducing is: X3=1.221 Fe ore deposit* 28 ÷ 144=0.2374 Fe ore deposit;
The reaction that has silicon to participate in reduction occurs in (4), (5), (6) formula, needs siliceous amount to be: X1+X2+X3=0.0849 Mn ore deposit+ 0.1273 Mn ore deposit+ 0.2374 Fe ore deposit, the quality of silicon in manganese-silicon after refining in advance;
Add the siliceous amount A that participates in reduction reaction in manganese-silicon to be: A=0.212 Mn ore deposit+ 0.237 Fe ore deposit(7)
Need add the manganese-silicon quality B through the pre-refining of pre-refining device to be: B=(28.2 Mn ore deposit+ 31.5 Fe ore deposit)/b (8)
The manganese-silicon quality B required according to 100kg mixing manganese ore, before the pre-refining of a certain stove manganese-silicon, quality is Gt, converts out required mixing manganese ore charge number (100kg is 1 batch) N and is:
N=100 G/B=100 G * b/(28.2 Mn ore deposit+ 31.5 Fe ore deposit) (9)
Two, iron ore add-on
Every batch is mixed manganese ore and establishes the quality that enters Mn in alloy, Fe element after pre-refining and refining and be respectively Mn alloykg, Fe alloykg,
Mn alloy=100 * Mn ore deposit% * 30%+B * Mn after pre-refining%=0.3 Mn ore deposit+ 1.33 A * Mn after pre-refining/ b (10)
Fe alloy=100 * Fe ore deposit% * 0.95+B * Fe after pre-refining%=0.95 Fe ore deposit+ 1.33 A * Fe after pre-refining/ b (11)
If C=Mn after pre-refining/ b, D=Fe after pre-refining/ b,
Mn alloy=0.3 Mn ore deposit+ 1.33 A * C (12)
Fe alloy=0.95 Fe ore deposit+ 1.33 A * D (13)
If Mn in%, Si in%, C in% for to smelt different varieties in, manganese content, silicon content, carbon content in low carbon ferromanganese alloy,
Fe alloy=[1-(Mn in%+Si in%+C in%)] Mn alloy/ Mn in% (14)
Bring (12), (13) into (14), establish E={ 1-(Mn in%+Si in%+C in%) }/Mn in%,
Mn alloy/ Fe alloy=(0.315 C * E-0.315 D-0.95)/(0.282 D-0.282 C * E-0.3 E).
The invention has the beneficial effects as follows:
Distribution fast, accurately, succinctly, operator search coefficient according to the produced trade mark, doing simple addition subtraction multiplication and division calculates just can produce and stablizes qualified product, avoid too much calculating, and result is more accurate, realize the accurate control of manganese ore and the iron ore amount of allocating into, optimized indices, reduced production cost.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention;
Fig. 2 is batching schema of the present invention.
Embodiment
Smelt the mid-carbon fe-mn alloy product of Mn75Fe18Si2.0C2.0, before pre-refining, manganese-silicon is Mn64Fe18Si16C2.0.
(1) the manganese ore amount of allocating into during refining
Manganese-silicon before pre-refining is weighed, its quality G=15t, manganese-silicon silicone content a%=16% before refining, refines front manganese-silicon manganese content L%=64% in advance in advance, detects the pre-rear manganese-silicon silicon content b%=11% that refines, and establishing the every 100kg of mixing manganese ore is 1 batch of material, manganese content Mn in ore deposit ore deposit%=49%, iron-holder Fe ore deposit%=4%;
Every batch of siliceous amount of mixing to participate in reduction reaction in the manganese-silicon that manganese ore allocates into is:
A=0.212 Mn ore deposit+ 0.237 Fe ore deposit=0.212 * 49+0.237 * 4=11.34kg;
Every batch of manganese-silicon quality of mixing the pre-refining that manganese ore allocates into is:
B=A/（75％×b％）=133 A/b=11.34/（75％×11％）=137.5kg；
Required mixing manganese ore charge is counted N and is:
N=100 G * b/(28.2 Mn ore deposit+ 31.5 Fe ore deposit)=100 * 15 * 11/(28.2 * 49+31.5 * 4)=11.
(2) the iron ore amount of allocating into during refining
k＝（1+2.93 a%）/(1+2.93 b%)=1.11；
Manganese-silicon manganese content Mn after pre-refining after pre-refining%={ L%+3.93 (a%-k b%) }/k=71.1%;
Manganese-silicon iron-holder Fe after pre-refining after pre-refining%=1-Mn after pre-refining%-Si after pre-refining%-C after pre-refining%=1-71.1%-11%-2%=15.9%;
C=Mn after pre-refining/ b=71.1 ÷ 11=6.46;
D=Fe after pre-refining/ b=15.9 ÷ 11=1.45;
Manganese content, silicon content, the carbon content of smelting in mid-carbon fe-mn alloy are respectively Mn in%, Si in%, C in%, E={ 1-(Mn in%+Si in%+C in%) }/Mn in%=(1-75%-2%-2%) ÷ 75%=0.28;
Mn alloy/ Fe alloy=(0.315 C * E-0.315 D-0.95)/(0.282 D-0.282 C * E-0.3 E)=(0.315 * 6.46 * 0.23-0.315 * 1.45-0.95) ÷ (0.282 * 1.45-0.282 * 6.46 * 0.23-0.3 * 0.23)=-0.837/ (0.185)=4.5.
(3) in mixing manganese ore, survey manganese content, iron-holder and count respectively Mn actual ore deposit%, Fe actual ore deposit%, calculates Mn actual ore deposit/ Fe actual ore depositvalue, judgement Mn actual ore deposit/ Fe whether actual ore depositbe less than Mn alloy/ Fe alloy, as shown in Figure 2, work as Mn actual ore deposit/ Fe actual ore deposit=44/10=4.4 < Mn alloy/ Fe alloy=4.5, need to change high-grade manganese ore, recalculate Mn actual ore deposit/ Fe actual ore depositvalue, judgement Mn actual ore deposit/ Fe actual ore depositwith Mn ore deposit/ Fe ore depositmagnitude relationship; Work as Mn actual ore deposit/ Fe actual ore depositbe not less than Mn alloy/ Fe alloytime, continue judgement Mn actual ore deposit/ Fe whether actual ore depositequal Mn alloy/ Fe alloy, work as Mn actual ore deposit/ Fe actual ore deposit=45/10=4.5=Mn alloy/ Fe alloy=4.5, do not need additional iron ore, directly smelt; Work as Mn actual ore deposit/ Fe actual ore deposit=48/6=8 > Mn alloy/ Fe alloy=4.5, need to add iron ore, iron ore add-on is Y, Y=Mn actual ore depositfe alloy/ Mn alloy-Fe actual ore deposit=48 * 0.22-6=4.56kg, every batch is mixed manganese ore and need allocate 4.56kg iron ore into.

Claims (1)

1. one kind is utilized 15m 3the method that large-scale pre-refining device refines in smelting, low carbon ferromanganese alloy is prepared burden fast, is characterized in that:
The 1.1 refining furnace manganese ore amounts of allocating into:
Before pre-refining, detection manganese-silicon quality, manganese content, silicon content are counted respectively G t, L%, a%, detect the manganese-silicon silicon content of refining in advance and count b% after pre-refining; Mix the every 100kg of manganese ore and count 1 batch of material, mix manganese ore manganese content and count Mn ore deposit%, iron-holder are Fe ore deposit%;
Every batch of siliceous amount of mixing to participate in reduction reaction in the manganese-silicon that manganese ore allocates into is counted A kg, A=0.212 Mn ore deposit+ 0.237 Fe ore deposit;
Every batch of manganese-silicon quality of mixing the pre-refining that manganese ore allocates into is counted B kg, B=(28.2 Mn ore deposit+ 31.5 Fe ore deposit)/b;
Required mixing manganese ore charge number is counted N, N=100G * b/(28.2 Mn ore deposit+ 31.5 Fe ore deposit);
The 1.2 refining furnace iron ore amounts of allocating into
Manganese content in the different varieties that will smelt, in low carbon ferromanganese alloy, silicon content, carbon content are counted respectively Mn in%, Si in%, C in%, actual measurement mixes manganese content, the iron-holder of manganese ore and counts respectively Mn actual ore deposit%, Fe actual ore deposit%, after pre-refining, manganese-silicon manganese content, iron-holder are counted respectively Mn after pre-refining%, Fe after pre-refining%, every batch is mixed the quality that manganese ore enters manganese element in manganese-silicon, ferro element after pre-refining and refining and counts respectively Mn alloykg, Fe alloykg, definition coefficient k, C, D, E;
k＝（1+2.93 a%）/(1+2.93 b%)；
Mn after pre-refining%=(L%+3.93 (a%-k * b%))/k;
Mn alloy=0.3 Mn ore deposit+ 1.33 A * Mn after pre-refining/ b, Fe alloy=0.95 Fe ore deposit+ 1.33 A * Fe after pre-refining/ b;
C=Mn after pre-refining/ b;
D=Fe after pre-refining/ b;
E={ 1-(Mn in%+Si in%+C in%) }/Mn in%;
Mn alloy/ Fe alloy=(0.315 C * E-0.315 D-0.95)/(0.282 D-0.282 C * E-0.3 E);
Calculate Mn actual ore deposit/ Fe actual ore depositvalue, judgement Mn actual ore deposit/ Fe actual ore depositwith Mn alloy/ Fe alloymagnitude relationship;
Judgement Mn actual ore deposit/ Fe whether actual ore depositbe less than Mn alloy/ Fe alloy, when being less than, change high-grade manganese ore, recalculate Mn alloy/ Fe alloyvalue, judgement Mn actual ore deposit/ Fe actual ore depositwith Mn alloy/ Fe alloymagnitude relationship;
When being not less than, continue judgement Mn actual ore deposit/ Fe whether actual ore depositequal Mn alloy/ Fe alloy, when equaling, not additional iron ore, directly smelts; Work as Mn actual ore deposit/ Fe actual ore deposit> Mn alloy/ Fe alloy, adding iron ore, the iron ore amount of allocating into is Ykg, Y=Mn actual ore depositfe alloy/ Mn alloy-Fe actual ore deposit.
CN201210313044.0A 2012-08-30 2012-08-30 Method for quickly proportioning in process of smelting medium-low-carbon ferromanganese alloy by using 15m<3> large-scale pre-smelting device Active CN102796870B (en)

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Publication number Priority date Publication date Assignee Title
JPS6056051A (en) * 1983-09-06 1985-04-01 Japan Metals & Chem Co Ltd Production of medium- and low-carbon ferromanganese
CN1382824A (en) * 2002-02-28 2002-12-04 湖南特种金属材料厂 Process for preparing low-carbon ferromanganese by induction furnace
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