CN101348845B - Method for smelting titanium slag with electric stove - Google Patents
Method for smelting titanium slag with electric stove Download PDFInfo
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- CN101348845B CN101348845B CN2008102130184A CN200810213018A CN101348845B CN 101348845 B CN101348845 B CN 101348845B CN 2008102130184 A CN2008102130184 A CN 2008102130184A CN 200810213018 A CN200810213018 A CN 200810213018A CN 101348845 B CN101348845 B CN 101348845B
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Abstract
The invention provides a method for smelting titanium slag by an electric stove. The method comprises the following steps: titanic iron and a reducing agent are mixed to prepare charging materials which are added into the electric stove; the titanium slag is smelted, the power of the electric stove is between 12MV.A and 30MV.A in the smelting process; and the slag is discharged, and the iron is discharged.
Description
Technical field
The present invention relates to a kind of method of smelting titanium slag with electric stove, more particularly, relate to a kind of method that adopts the high power electric furnace smelting titanium slag.
Background technology
The electric furnace process smelting titanium slag is with reductive agent (as hard coal, refinery coke, coke etc.) ilmenite to be carried out selective reduction to remove most of iron, make titanium go into the slag enrichment and make iron become molten iron, thereby produce titanium slag and two kinds of products of the pig iron (half steel).The production technique of this method is simple, maturation, and flow process is short, the efficient height, the iron that produces can directly utilize, and does not produce solid and liquid waste, heat and coal gas that electric furnace produces can be recycled, environmentally safe, titanium slag product have special processing performance again and be other rich titanium material can't be obtained.
(1MVA～10MVA) there are a lot of shortcomings in the technology of smelting titanium slag with electric stove to the small power of prior art, and for example the fluctuation of electric furnace small scale, the working of a furnace is big, labour intensity is big, automatization level is low, consumptions is high, cost is high, seriously polluted, electric furnace is lacked work-ing life etc.
Summary of the invention
The present invention is by providing a kind of method of smelting titanium slag with electric stove, overcome one or more in the above-mentioned technical problem, and this method may further comprise the steps: ilmenite and reductive agent are mixed to come prepared furnace charge; Furnace charge is added electric furnace; Smelting titanium slag, the power of electric furnace is 12MVA～30MVA in the smelting process; Slag tap, tap a blast furnace.
TiO in the ilmenite
2Weight content can be more than or equal to 44%, the carbon content of reductive agent can more than or equal to 80% and reductive agent can be a kind of in coke, hard coal, the refinery coke, the carbon ratio of joining of furnace charge is 5%～20%, the gross weight of a heat furnace charge that adds in the electric furnace is 120 tons～180 tons, describedly joins the weight ratio that carbon ratio is reductive agent and ilmenite in the furnace charge.
Can the step execution of prepared furnace charge and adding furnace charge is multiple batches of, preferably, carry out 3 batches～6 batches.
3 batches～6 batches of the step execution of prepared furnace charge and adding furnace charge and the step of smelting can be comprised: the furnace charge adding electric furnace of last batch of preparation is smelted; In electric furnace, form after the big molten bath, titanium slag is carried out sampling operation, determine the carbon ratio of joining of back one batch of batching, prepare back one batch of furnace charge then and add back one batch of furnace charge according to sampling result.Obtain TiO in the titanium slag when measuring by sampling operation
2Content during less than predetermined content, can improve the carbon ratio of joining of back one batch of furnace charge; Obtain TiO in the titanium slag when measuring by sampling operation
2Content when being higher than predetermined content, can reduce the carbon ratio of joining of back one batch of furnace charge, described predetermined content is in 72%～85% scope.
Every batch of prepared furnace charge can comprise with the process that adds furnace charge: prepare first kind of furnace charge and second kind of furnace charge, when adding furnace charge for every batch, simultaneously first kind of furnace charge and second kind of furnace charge are added to centre charging point and edge feed point in the electric furnace respectively, wherein, the weight of first kind of furnace charge of the furnace charge of every batch of preparation accounts for 5%～20% of batch reinforced gross weight, the carbon ratio of joining of first kind of furnace charge of the furnace charge of every batch of preparation is lower than the carbon ratio of joining with second kind of furnace charge of the furnace charge of batch preparation, for example, the carbon ratio of joining of first kind of furnace charge of the furnace charge of every batch of preparation is 5%～10%, and the carbon ratio of joining of second kind of furnace charge of the furnace charge of batch preparation is 10%～20% together.
The temperature that can keep titanium slag in the smelting process is 1600 ℃～1800 ℃, can adopt self baking electrode or Graphite Electrodes transmission power, the length of welding tip can be 1.8m～2.5m, electrode current can be controlled in 25000A～45000A, electrode voltage can be controlled in 300V～400V, the relative barometric pressure in the smelting process in the stove can be controlled in 5Pa～-10Pa.
Also can be included in according to the method for smelting titanium slag of the present invention and to carry out the operation of safeguarding the dross layer in the smelting process.Specifically, the furnace charge of every batch of adding all melt form big molten bath after or the furnace charge of whole stove all add form big molten bath after, centre charging point to electric furnace adds 50kg～200kg reductive agent, or from stove gate adding 50kg～200kg reductive agent, the temperature of the slag blanket of control molten iron top is 1700 ℃～1800 ℃, the content of FeO is 5%～10% in the slag blanket, make the dross layer thickness of electric furnace maintain 600mm～1200mm, wherein, described stove gate be positioned at furnace wall over against electrode and with electrode position separated by a distance.
The step of smelting titanium slag also can comprise the operation of carrying out endpoint and control.Specifically, in smelting process, when unit is the electric furnace total power consumption of MW during numerically for 1 times～1.4 times of whole stove furnace charge tonnage, by titanium slag is taken a sample and fast chemical examination judge TiO in the titanium slag
2Whether reach predetermined content, if do not reach predetermined content, then add 0.5 ton～5 tons ilmenites and/or 0.2 ton～1 ton reductive agent separately from feed bin, adjust titanium slag and reach predetermined content, described predetermined content is in 72%～85% scope.Be under 1600 ℃～1800 ℃ the situation, can slag tap after titanium slag reaches predetermined content and in the temperature of titanium slag layer, tap a blast furnace.
Method according to smelting titanium slag with electric stove of the present invention has the following advantages:
(1) furnace power is big, has realized the maximization of titanium slag electric furnace, and working strength of workers reduces significantly;
(2) working of a furnace is stable in the smelting process, slag turning over does not take place substantially, phenomenon such as the material that collapses;
(3) can keep the dross layer of suitable depth in the stove, electric furnace long service life, electric furnace thermo-efficiency height;
(4) tap to tap time is short;
(5) fluctuation of titanium slag grade is little, steady quality, and the titanium slag smelting cost is low;
(6) adopt self baking electrode and Graphite Electrodes all can realize titanium slag smelting production;
(7) do not produce waste gas, waste residue and waste water, non-environmental-pollution.
Embodiment
Now, will the method according to smelting titanium slag with electric stove of the present invention be described in detail.
Method according to smelting titanium slag with electric stove of the present invention may further comprise the steps:
(1) ilmenite and reductive agent are mixed to come prepared furnace charge;
(2) furnace charge is added electric furnace;
(3) smelting titanium slag, wherein, the power of electric furnace is 12MVA～30MVA in the smelting process;
(4) slag tap, tap a blast furnace.
According to the method for smelting titanium slag with electric stove of the present invention, ilmenite is a powder, TiO in the ilmenite
2Weight content more than or equal to 44% (being preferably 44%～47%), reductive agent is a kind of in granular coke, hard coal, the refinery coke, the particle diameter of reductive agent is that 1mm～15mm and carbon content are not less than 80%.The step of batching also can comprise the adding dust, and described dust is to remove dust by the one-level that dust-removal system produces, and is the mixture of ilmenite and reductive agent.The gross weight of a heat furnace charge that adds in the electric furnace is 120 tons～180 tons.
According to the method for smelting titanium slag with electric stove of the present invention, the step of prepared furnace charge and adding furnace charge can be carried out 3 times～6 times.Specifically, prepare last batch of furnace charge, the furnace charge adding electric furnace of last batch of preparation is smelted according to 5%～20% the carbon ratio (weight ratio of reductive agent and ilmenite in the furnace charge) of joining; In electric furnace, form after the big molten bath, titanium slag is carried out sampling operation, determine the carbon ratio of joining of back one batch of batching, prepare back one batch of furnace charge then and add back one batch of furnace charge according to sampling result.More particularly, when measure the titanium slag grade (TiO in the titanium slag that obtains by sampling operation
2Content) during less than predetermined grade, improve the carbon ratio of joining of back one batch of furnace charge; When measuring the titanium slag grade obtain by sampling operation and be higher than predetermined grade, reduce the carbon ratio of joining of back one batch of furnace charge, every batch of furnace charge join carbon ratio in 5%～20% scope, described predetermined grade is for example in 72%～85% scope.More than adjusting the operation join carbon ratio mainly calculates according to operating experience and material balance and carries out.Therefore, by above-mentioned multiple batches of batching and multiple batches of reinforced operation, help the grade of titanium slag is controlled in the pre-determined range.
Dividing under three batchings and the reinforced situation, the 20%～30%, three batch of furnace charge that 50%～60%, second batch of furnace charge that first furnace charge accounts for total feeding quantity accounts for total feeding quantity accounts for 10%～20% of total feeding quantity.Dividing under four batchings and the reinforced situation, the 10%～20%, four batch of furnace charge that the 20%～30%, three batch of furnace charge that 40%～50%, second batch of furnace charge that first furnace charge accounts for total feeding quantity accounts for total feeding quantity accounts for total feeding quantity accounts for 5%～15% of total feeding quantity.Under the situation of dividing five batchings and feeding in raw material, first furnace charge accounts for 40%～50% of total feeding quantity, second batch of furnace charge accounts for 20%～30% of total feeding quantity, the 3rd batch of furnace charge accounts for 10%～20% of total feeding quantity, the 5%～15%, five batch of furnace charge that the 4th batch of furnace charge accounts for total feeding quantity accounts for 5%～10% of total feeding quantity.Under the situation of dividing six batchings and feeding in raw material, first furnace charge accounts for 40%～50% of total feeding quantity, second batch of furnace charge accounts for 15%～25% of total feeding quantity, the 3rd batch of furnace charge accounts for 8%～15% of total feeding quantity, the 4th batch of furnace charge accounts for 5%～10% of total feeding quantity, the 5%～8%, six batch of furnace charge that the 5th batch of furnace charge accounts for total feeding quantity accounts for 3%～5% of total feeding quantity.Yet in the method according to smelting titanium slag with electric stove of the present invention, batching and reinforced number of times are not limited thereto, and the number of times of for example preparing burden and feeding in raw material can be more than six times.
In traditional smelting process, adopt once all reinforced feed way usually, in adding the stove internal procedure because the ilmenite in the furnace charge causes blanking velocity inconsistent because of proportion is different with reductive agent, so in stove, can produce charging segregation.By multiple batches of batching and reinforced, prevent the segregation of furnace charge in the stove according to the method for smelting titanium slag with electric stove of the present invention effectively.
In addition, in traditional smelting process, the stockpile that the disposable adding stove of whole or big portion of every heat furnace charge is interior and formation is bigger is easy at the fusion of stockpile place, sintering away from the high-temperature zone and have the ilmenite that hangs down soft heat point, causes the difficult sinking automatically of furnace charge; In case crust subsides suddenly, the top furnace charge falls into slag blanket, will increase the reduction reaction in the slag suddenly, produces a large amount of CO gases, make the slag body produce violent agitation and even splash (turning over slag), and will last till always that falling into the furnace charge reaction finishes and just can return to tranquility; Simultaneously, intensive boiling can make again on every side that furnace charge is involved in more, encourages boiling intensity further and prolongs the time length.Causing that the internal cause of collapsing material and turning over slag is the surging full property of titanium slag self, and external cause is a furnace charge, if it is thin and do not produce and subside not pile up the furnace charge or the bed of material on the slag blanket, certainly also just do not exist furnace charge to enter in the high-temperature slag and react and a large amount of gases that happen suddenly, do not had the effect of this external cause of source of the gas also just the phenomenon of slag turning over can not occur.Pass through multiple batches of (for example 3 batches～6 batches) batching and reinforced according to the method for smelting titanium slag with electric stove of the present invention, make the once whole reinforced thin furnace charge of even not piling up of furnace charge layer of furnace charge layer ratio of slag blanket top, therefore can reduce the generation of collapse material, slag turning over.
Method according to smelting titanium slag with electric stove of the present invention, every batch of batching and reinforced process can comprise first kind of furnace charge of preparation and second kind of furnace charge and at every batch of first kind of furnace charge and second kind of furnace charge that adds this batch when reinforced simultaneously, first kind of furnace charge will be for being added to the furnace charge of the centre charging point in the electric furnace, second kind of furnace charge will be for being added to the furnace charge of the edge feed point in the electric furnace, the weight of first kind of furnace charge accounts for 5%～20% of the reinforced gross weight of this batch, first kind of furnace charge join the carbon ratio of joining that carbon ratio is lower than second kind of furnace charge, for example, the carbon ratio of joining of first kind of furnace charge is that the carbon ratio of joining of 5%～10%, second kind of furnace charge is 10%～20%.First kind of furnace charge to join carbon ratio low be in order to accelerate the furnace charge burn-off rate, the electric furnace center forms big molten bath fast, strengthens the heat passage convection effects of fusing back material, reduces melting electric consumption, shortens smelting cycle.The carbon ratio height of joining of second kind of furnace charge is for the ease of protection dross layer, reduces washing away the furnace wall of electric furnace.
According to the method for smelting titanium slag with electric stove of the present invention, described electric furnace is a closed electric furnace, also can adopt the semi closed electric furnace.Under the situation of electric furnace being sent electricity, add first furnace charge, keeping the temperature of titanium slag in the smelting process is 1600 ℃～1800 ℃, adopt self baking electrode or Graphite Electrodes transmission power, the length of welding tip is 1.8m～2.5m, sending electric power is 12MVA～30MVA (for example 25.5MVA), electrode current is controlled at 25000A～45000A, electrode voltage is controlled at 300V～400V, wherein, according to the quality condition that send electric difficulty or ease and electrode in the stove, guarantee the input of above-mentioned power by adjusting size of current and/or voltage range, the relative barometric pressure in the stove be controlled at 5Pa～-10Pa.By smelting process, 10%～30% TiO in the ilmenite
2Be reduced to titanium at a low price, the Fe in the ilmenite
2O
3Be reduced to FeO or metallic iron.
Titanium slag at high temperature has stronger chemically reactive, can corrode various refractory materialss, so usually electric furnace was carried out the dross operation before smelting, promptly forms the dross layer on furnace wall, and the dross layer mainly form at a low price by infusible by titanium oxide, titanium carbide and titanium nitride.Yet the dross layer in smelting process on the furnace wall can damage inevitably.Therefore, also can be included in according to the method for smelting titanium slag with electric stove of the present invention and carry out the operation of safeguarding the dross layer in the smelting process.Specifically, when the operation of dross layer is safeguarded in each execution, add 50kg～200kg reductive agent from the center filling tube to the centre charging point of electric furnace, or from stove gate adding 50kg～200kg reductive agent, the temperature of the slag blanket of control molten iron top is 1700 ℃～1800 ℃, the content of FeO is 5%～10% in the slag blanket, makes the dross layer thickness of electric furnace maintain 600mm～1200mm.Here, described stove gate be positioned at furnace wall over against electrode and with electrode position separated by a distance.
Thickness according to the dross layer determines whether to carry out the operation of safeguarding the dross layer, that is, if the thickness of dross layer less than preset value, is then carried out the operation of safeguarding the dross layer, make the thickness of dross layer be not less than preset value; If the thickness of dross layer is not less than described preset value, then need not carry out the operation of safeguarding the dross layer, described preset value is in the scope of 600mm～1200mm.Preferably, by safeguarding the operation of dross layer, the thickness that makes the dross layer is in the scope of 600mm～1200mm.Carry out at needs under the situation of the operation safeguard the dross layer, this operation generally is to carry out after forming big molten bath every batch of reinforced all fusing, carry out after also can all adding the big molten bath of formation at the furnace charge of whole stove.Carry out at needs under the situation of the operation safeguard the dross layer,, describedly safeguard that operating in of dross layer can be carried out once in the smelting cycle (that is, smelting the furnace charge of a heat) or repeatedly according to the situation of dross layer loss.
Therefore, according to the method for smelting titanium slag with electric stove of the present invention, by make second kind of furnace charge to join carbon ratio higher and/or carry out the operation safeguard the dross layer in smelting process, can keep the dross layer of suitable depth, thereby prolong the work-ing life of electric furnace.
In the later stage of smelting, carry out the operation of endpoint and control.Specifically, determine to smelt the power consumption of needs according to the total amount of the furnace charge that adds, be under the situation of 78% titanium slag for example adding that 120 tons of furnace charges smelt with the production grade, unit is that the total power consumption of MW numerically is to be 1 times～1.4 times of furnace charge gross weight of unit, i.e. 120MW～168MW with the ton.When importing required total power consumption, by titanium slag being taken a sample and chemically examining fast and judge whether titanium slag reaches predetermined grade, if do not reach predetermined grade, then add 0.5 ton～5 tons ilmenites and/or 0.2 ton～1 ton reductive agent separately from feed bin, adjust titanium slag and reach predetermined grade, described predetermined grade is for example in 72%～85% scope.It should be noted that the ilmenite that adds in endpoint and the controlled step and/or reductive agent not can be regarded as aforesaid multiple batches of once reinforced in reinforced.At last, the temperature (this temperature is controlled at 1600 ℃～1800 ℃) of bonding titanium slag blanket can be slagged tap, be tapped a blast furnace when titanium slag reaches predetermined grade, promptly slags tap and iron notch under slag notch taps a blast furnace from slag notch, and the carbon content of molten iron is 1%～3%.
Therefore, the present invention adopts the high power electric furnace smelting titanium slag, has realized the maximization of titanium slag electric furnace, and working strength of workers reduces significantly.In addition, in the method according to smelting titanium slag with electric stove of the present invention, the working of a furnace is stable in the smelting process, slag turning over does not take place substantially, phenomenon such as the material that collapses; Keep the dross layer of suitable depth in the stove, electric furnace long service life, electric furnace thermo-efficiency height; Tap to tap time is short; The fluctuation of titanium slag grade is little, steady quality, and the titanium slag smelting cost is low; And adopt self baking electrode or Graphite Electrodes all can realize titanium slag smelting production, do not produce waste gas, waste residue and waste water, non-environmental-pollution.
The invention is not restricted to the foregoing description, without departing from the present invention, can carry out various changes and modifications.
Claims (15)
1. the method for a smelting titanium slag with electric stove is characterized in that may further comprise the steps:
Ilmenite and reductive agent are mixed to come prepared furnace charge;
Furnace charge is added electric furnace;
Smelting titanium slag, the power of electric furnace is 12MVA～30MVA in the smelting process;
Slag tap, tap a blast furnace,
Wherein, TiO in the ilmenite
2Weight content more than or equal to 44%, the carbon content of reductive agent more than or equal to 80% and reductive agent be a kind of in coke, hard coal, the refinery coke, the carbon ratio of joining of furnace charge is 5%～20%, the gross weight of a heat furnace charge that adds in the electric furnace is 120 tons～180 tons, describedly join the weight ratio that carbon ratio is reductive agent and ilmenite in the furnace charge
Carry out the step of prepared furnace charge and adding furnace charge multiple batches of, every batch of prepared furnace charge comprises with the process that adds furnace charge: prepare first kind of furnace charge and second kind of furnace charge, when adding furnace charge for every batch, simultaneously first kind of furnace charge and second kind of furnace charge are added to centre charging point and edge feed point in the electric furnace respectively, wherein, the weight of first kind of furnace charge of the furnace charge of every batch of preparation accounts for 5%～20% of batch reinforced gross weight, and the carbon ratio of joining of first kind of furnace charge of the furnace charge of every batch of preparation is lower than the carbon ratio of joining with second kind of furnace charge of the furnace charge of batch preparation.
2. the method for smelting titanium slag with electric stove as claimed in claim 1 is characterized in that, the step of prepared furnace charge and adding furnace charge is carried out 3 batches～6 batches.
3. the method for smelting titanium slag with electric stove as claimed in claim 2 is characterized in that, 3 batches～6 batches of the step execution of prepared furnace charge and adding furnace charge and the step of smelting are comprised: the furnace charge adding electric furnace of last batch of preparation is smelted; In electric furnace, form after the big molten bath, titanium slag is carried out sampling operation, determine the carbon ratio of joining of back one batch of batching, prepare back one batch of furnace charge then and add back one batch of furnace charge according to sampling result.
4. the method for smelting titanium slag with electric stove as claimed in claim 3 is characterized in that, obtains TiO in the titanium slag when measuring by sampling operation
2Content during less than predetermined content, improve the carbon ratio of joining of back one batch of furnace charge; Obtain TiO in the titanium slag when measuring by sampling operation
2Content when being higher than predetermined content, reduce the carbon ratio of joining of back one batch of furnace charge, described predetermined content is in 72%～85% scope.
5. the method for smelting titanium slag with electric stove as claimed in claim 4, it is characterized in that, under situation with prepared furnace charge and 3 batches of the step execution that adds furnace charge, first batch of furnace charge accounts for 50%～60% of total feeding quantity, the 20%～30%, three batch of furnace charge that second batch of furnace charge accounts for total feeding quantity accounts for 10%～20% of total feeding quantity.
6. the method for smelting titanium slag with electric stove as claimed in claim 4, it is characterized in that, under situation with prepared furnace charge and 4 batches of the step execution that adds furnace charge, first batch of furnace charge accounts for 40%～50% of total feeding quantity, second batch of furnace charge accounts for 20%～30% of total feeding quantity, the 10%～20%, four batch of furnace charge that the 3rd batch of furnace charge accounts for total feeding quantity accounts for 5%～15% of total feeding quantity.
7. the method for smelting titanium slag with electric stove as claimed in claim 4, it is characterized in that, under situation with prepared furnace charge and 5 batches of the step execution that adds furnace charge, first batch of furnace charge accounts for 40%～50% of total feeding quantity, second batch of furnace charge accounts for 20%～30% of total feeding quantity, the 5%～15%, five batch of furnace charge that the 10%～20%, four batch of furnace charge that the 3rd batch of furnace charge accounts for total feeding quantity accounts for total feeding quantity accounts for 5%～10% of total feeding quantity.
8. the method for smelting titanium slag with electric stove as claimed in claim 4, it is characterized in that, under situation with prepared furnace charge and 6 batches of the step execution that adds furnace charge, first batch of furnace charge accounts for 40%～50% of total feeding quantity, second batch of furnace charge accounts for 15%～25% of total feeding quantity, the 3rd batch of furnace charge accounts for 8%～15% of total feeding quantity, the 4th batch of furnace charge accounts for 5%～10% of total feeding quantity, the 5%～8%, six batch of furnace charge that the 5th batch of furnace charge accounts for total feeding quantity accounts for 3%～5% of total feeding quantity.
9. the method for smelting titanium slag with electric stove as claimed in claim 1 is characterized in that, the carbon ratio of joining of first kind of furnace charge of the furnace charge of every batch of preparation is 5%～10%, and the carbon ratio of joining of second kind of furnace charge of the furnace charge of batch preparation is 10%～20% together.
10. the method for smelting titanium slag with electric stove as claimed in claim 1, it is characterized in that, keeping the temperature of titanium slag in the smelting process is 1600 ℃～1800 ℃, adopt self baking electrode or Graphite Electrodes transmission power, the length of welding tip is 1.8m～2.5m, electrode current is controlled at 25000A～45000A, and electrode voltage is controlled at 300V～400V, the relative barometric pressure in the smelting process in the stove be controlled at 5Pa～-10Pa.
11. the method for smelting titanium slag with electric stove as claimed in claim 1 is characterized in that, the method for described smelting titanium slag with electric stove also is included in and carries out the operation of safeguarding the dross layer in the smelting process.
12. the method for smelting titanium slag with electric stove as claimed in claim 11, it is characterized in that, execution safeguards that the operation of dross layer comprises: the furnace charge of every batch of adding all melt form big molten bath after or the furnace charge of whole stove all add form big molten bath after, centre charging point to electric furnace adds 50kg～200kg reductive agent, or from stove gate adding 50kg～200kg reductive agent, the temperature of the slag blanket of control molten iron top is 1700 ℃～1800 ℃, the content of FeO is 5%～10% in the slag blanket, make the dross layer thickness of electric furnace maintain 600mm～1200mm, wherein, described stove gate be positioned at furnace wall over against electrode and with electrode position separated by a distance.
13. the method for smelting titanium slag with electric stove as claimed in claim 1 is characterized in that, the step of smelting titanium slag also comprises the operation of carrying out endpoint and control.
14. the method for smelting titanium slag with electric stove as claimed in claim 13, it is characterized in that, the operation of endpoint and control comprises: in smelting process, when unit is the electric furnace total power consumption of MW during numerically for 1 times～1.4 times of whole stove furnace charge tonnage, by titanium slag is taken a sample and fast chemical examination judge TiO in the titanium slag
2Whether reach predetermined content, if do not reach predetermined content, then add 0.5 ton～5 tons ilmenites and/or 0.2 ton～1 ton reductive agent separately from feed bin, adjust titanium slag and reach predetermined content, described predetermined content is in 72%～85% scope.
15. the method for smelting titanium slag with electric stove as claimed in claim 14 is characterized in that, after titanium slag reaches predetermined content and in the temperature of titanium slag layer is under 1600 ℃～1800 ℃ the situation, to slag tap, and taps a blast furnace.
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| CN103820600B (en) * | 2014-03-05 | 2015-09-16 | 攀钢集团钛业有限责任公司 | The dross method of smelting titanium slag with electric stove |
| CN104087697B (en) * | 2014-07-04 | 2016-04-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Titanium slag electric furnace dross layer maintaining method |
| CN104087710B (en) * | 2014-07-24 | 2016-05-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Electric furnace smelting pre-reduced pellet is prepared the method for titanium slag |
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| CN115161087A (en) * | 2022-07-12 | 2022-10-11 | 龙佰武定钛业有限公司 | Recycling method of fine-grain anthracite |
| CN115341108B (en) * | 2022-08-12 | 2023-12-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Maintenance method for slag layer of electric furnace |
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