CN109536669A - A kind of slag material of mineral hot furnace baker - Google Patents
A kind of slag material of mineral hot furnace baker Download PDFInfo
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- CN109536669A CN109536669A CN201910052136.XA CN201910052136A CN109536669A CN 109536669 A CN109536669 A CN 109536669A CN 201910052136 A CN201910052136 A CN 201910052136A CN 109536669 A CN109536669 A CN 109536669A
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- slag
- coke
- slag material
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/54—Processes yielding slags of special composition
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5264—Manufacture of alloyed steels including ferro-alloys
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Ceramic Products (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
A kind of slag material of mineral hot furnace baker, is made of following component, scarfing cinder 300-400 parts by weight；Silica 100-220 parts by weight；Dolomite 400-600 parts by weight；Coke 50-150 parts by weight.The melting temperature of the slag material of mineral hot furnace baker of the present invention is 1100-1400 DEG C, when carrying out " slag baking " using slag material of the present invention, make 1100-1400 DEG C of furnace lining calefactive interzone, can rationally fill the temperature difference between " slag baking " and " electric oven ", effectively improve the service life of furnace lining.
Description
Technical field
The present invention relates to field of metallurgy, in particular to a kind of slag material of mineral hot furnace baker.
Background technique
After the completion of the ferroalloy industry large size mineral hot furnace furnace lining is built at this stage, need to carry out furnace operation, by mineral hot furnace carbon
Volatile impurity (such as a small amount of water) in matter furnace lining is driven out of, to guarantee mineral hot furnace furnace lining long-term stable operation.
Currently, the baker mode that mineral hot furnace generallys use are as follows: material baking+coke baking+electric oven or burnt baking+electric oven.
There are following deficiencies for baker mode at this stage:
1, in-furnace temperature can only be promoted to 1000-1100 DEG C by material baking+coke baking+electric oven baker mode, material baking+coke baking,
Direct material when ore raw materials is through electric oven, molten iron temperature are directly increased to 1400 DEG C or more, since furnace lining does not undergo 1100-
1400 DEG C of temperature ranges result even in furnace lining cracking when serious.
2, when burnt baking+electric oven, electric oven directly generates molten iron, can corrode carbonaceous furnace lining, furnace lining is caused to damage.
Therefore, how safe and reliable, linear temperature increase baker is those skilled in the art's urgent problem to be solved.
Summary of the invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide a kind of slag material of mineral hot furnace baker, meltings
Temperature is 1100-1400 DEG C, when carrying out " slag baking " using slag material of the present invention, makes 1100-1400 DEG C of furnace lining calefactive interzone, energy
The rationally temperature difference between filling " slag baking " and " electric oven ", effectively improves the service life of furnace lining.
The technical scheme is that a kind of slag material of mineral hot furnace baker, is made of following component,
Scarfing cinder 300-400 parts by weight；
Silica 100-220 parts by weight；
Dolomite 400-600 parts by weight；
Coke 50-150 parts by weight.
Preferably, the slag material of mineral hot furnace baker is made of following component,
Scarfing cinder 340-360 parts by weight；
Silica 150-170 parts by weight；
Dolomite 450-550 parts by weight；
Coke 80-120 parts by weight.
Further, the scarfing cinder is by 10-18wt%Mn, 20-50wt%SiO2, 10-40wt%CaO, 5-15wt%
MgO, 10-30wt%Al2O3Composition, the partial size of scarfing cinder are 60-80mm.
Further, SiO in the silica2Content >=95%, surplus are impurity, and the partial size of silica is 40-60mm；It is described
Carbon content >=86% is fixed in coke, surplus is impurity, and the partial size of coke is 40-60mm.
Further, the dolomite is by 20-30wt%SiO2, 20-40wt%CaO, 10-30wt%MgO, surplus be it is miscellaneous
Texture is at the partial size of dolomite is 40-60mm.
The present invention also provides any of the above-described slag materials for the purposes in mineral hot furnace baker.
It has the advantages that by adopting the above technical scheme
1, mineral hot furnace baker slag material provided by the invention, melting temperature are 1100-1400 DEG C.Mineral hot furnace " coke dries " temperature
Degree is 1000-1100 DEG C, and " electric oven " temperature is 1400 DEG C or more, therefore, can rationally be filled between " slag baking " and " electric oven "
Temperature difference makes furnace lining heating uniformly, and temperature curve rises rationally, avoids carbonaceous furnace lining from cracking, keeps the volatilization in carbonaceous furnace lining miscellaneous
Matter is uniformly overflowed, and the sintering strength of carbonaceous furnace lining is effectively improved.In addition, clinker is generated using after slag material of the present invention " slag baking ",
The molten iron that clinker density generates when hereinafter, " electric oven " can be effectively reduced 2.0 corrodes carbonaceous furnace lining, and carbonaceous furnace lining is avoided to damage.
2, mineral hot furnace baker slag material provided by the invention selects scarfing cinder, silica, dolomite, coke as raw material, former
Material is easy to get, is inexpensive, advantageously reduces enterprise's production cost.Scarfing cinder therein is as major ingredient, and silica, dolomite are as auxiliary material, control
The weight ratio of major ingredient processed, auxiliary material is in 1100-1400 DEG C of temperature range after guaranteeing slag material melting.If turning down or being turned up
Scarfing cinder, silica, the proportion between dolomite, will lead to the melting temperature of slag material or lower than 1100 DEG C, or be higher than 1400 DEG C, lose
It is gone rationally to fill the technical effect of the temperature difference between " slag baking " and " electric oven ".Coke is mainly used for improving the conduction of slag material
Property, guarantee that slag material smoothly melts.
3, in slag material of the present invention the size controlling of scarfing cinder in 60-80mm, silica size controlling in 40-60mm, dolomite
Size controlling guarantees slag material under the premise of meeting normal pipeline conveying in 40-60mm in 40-60mm, coke particle diameter control
Gas permeability.
4, using the carbonaceous furnace lining after slag material baker of the present invention, through applicant's verification experimental verification, with use material baking+coke sound of a roaring fire
Carbonaceous furnace lining after furnace is compared, and service life improves 1 year or more.
In the present invention, the parts by weight are gram, kilogram.
It is further described with reference to the accompanying drawings and detailed description.
Detailed description of the invention
Fig. 1 is baker schematic diagram of the invention.
In attached drawing, 1 is refractory material layer, and 2 be roasting cylinder, and 3 be coke layer, and 4 be the slag making bed of material, and 5 be mineral hot furnace furnace lining, 6
For layer of igniting.
Specific embodiment
The technique for not indicating design parameter in the embodiment of the present invention, item usually according to normal condition or according to the manufacturer's recommendations
Part carries out, and does not indicate the equipment or raw material of concrete model, usually equipment conventional in field of metallurgy or raw material.
The scarfing cinder that the present invention selects, usually steel-making enterprise smelts the clinker that manganese steel generates, by 10-18wt%Mn, 20-
50wt%SiO2, 10-40wt%CaO, 5-15wt%MgO, 10-30wt%Al2O3Composition, being crushed to partial size is 60-80mm, is made
SiO in silica2Content >=95%, being crushed to partial size is 40-60mm, fixes carbon content >=86%, powder in the coke used
Being broken to partial size is 40-60mm, and the dolomite used is by 20-30wt%SiO2, 20-40wt%CaO, 10-30wt%MgO, surplus
For impurity composition, being crushed to partial size is 40-60mm.
Slag material matches such as table 1
1 slag material of table
Method using the slag material of proportion 1 to 3 in table 1 for baker has follow steps referring to Fig. 1,
1) in 5 bottom of mineral hot furnace furnace lining tiling, one layer of refractory material, refractory material layer 1 is formed, specifically, mineral hot furnace furnace lining
For carbonaceous furnace lining, base diameter 10800mm, in the present embodiment, refractory material is refractory brick, and laying depth 200mm is laid with
Mode is, refractory material is laid in 5 bottom of mineral hot furnace furnace lining in three round refractory material layers, each circle refractory material layer it is straight
Diameter is 2600mm, and three round refractory material layers are distributed in positive triangle.
2) three irony roasting cylinders 2 are shelved in the step 1) refractory material layer 1, three irony roasting cylinders 2 are in
Positive triangle distribution, specifically, respectively the height of roasting cylinder is 1600mm.
3) coke is contained in each roasting cylinder 2 of step 2), until full, coke particle diameter 10-40mm.
4) space between each roasting cylinder 2 of step 2), 5 inner wall of mineral hot furnace furnace lining is laid with a coke charge charcoal, coke grain
Diameter is 10-40mm, forms coke layer 3, and the thickness of coke layer 3 is less than the height of roasting cylinder 2, is laid with one on the coke layer 3
Layer slag material, forms the slag making bed of material 4, specifically, coke layer with a thickness of 200mm, edge in the height to roasting cylinder of the slag making bed of material,
It can also emerge and roast edge on cylinder.Further, on fire for convenience, it is equipped with timber below coke layer 3, forms layer 6 of igniting,
That ignites layer is also equipped with one layer of slag material between furnace lining bottom.
5) the matched each of three electrodes of mineral hot furnace are inserted in the coke in corresponding three ironys roasting cylinder 2, are powered, are formed
Electrical circuit, until baker finishes after the slag making bed of material 4 melts completely.
Carbonaceous furnace lining after baker can put into ore material base, carry out normal reduction smelting.
Through applicant's verification experimental verification, under the conditions of the same furnace charge working of a furnace, using slag material of the present invention cooperation " coke dries ", carbonaceous
Furnace lining volatile impurity uniformly overflows burner hearth, and heating curve is more reasonable, and carbonaceous furnace lining degree of graphitization is bigger, and molten iron is to furnace bottom
Erosion it is smaller, lining durability theoretically improves 1 year or more than baker mode at this stage.
Claims (6)
1. a kind of slag material of mineral hot furnace baker, which is characterized in that it is made of following component,
Scarfing cinder 300-400 parts by weight；
Silica 100-220 parts by weight；
Dolomite 400-600 parts by weight；
Coke 50-150 parts by weight.
2. slag material according to claim 1, which is characterized in that it is made of following component,
Scarfing cinder 340-360 parts by weight；
Silica 150-170 parts by weight；
Dolomite 450-550 parts by weight；
Coke 80-120 parts by weight.
3. slag material according to claim 1 or 2, which is characterized in that the scarfing cinder is by 10-18wt%Mn, 20-50wt%
SiO2, 10-40wt%CaO, 5-15wt%MgO, 10-30wt%Al2O3Composition, the partial size of scarfing cinder are 60-80mm.
4. slag material according to claim 1 or 2, which is characterized in that SiO in the silica2Content >=95%, surplus are
Impurity, the partial size of silica are 40-60mm；Carbon content >=86% is fixed in the coke, surplus is impurity, and the partial size of coke is
40-60mm。
5. slag material according to claim 1 or 2, which is characterized in that the dolomite is by 20-30wt%SiO2、20-
40wt%CaO, 10-30wt%MgO, surplus are impurity composition, and the partial size of dolomite is 40-60mm.
6. any slag material of claim 1-5 is for the purposes in mineral hot furnace baker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910052136.XA CN109536669B (en) | 2019-01-21 | 2019-01-21 | Slag-making material for submerged arc furnace drying oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910052136.XA CN109536669B (en) | 2019-01-21 | 2019-01-21 | Slag-making material for submerged arc furnace drying oven |
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| Publication Number | Publication Date |
|---|---|
| CN109536669A true CN109536669A (en) | 2019-03-29 |
| CN109536669B CN109536669B (en) | 2020-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910052136.XA Active CN109536669B (en) | 2019-01-21 | 2019-01-21 | Slag-making material for submerged arc furnace drying oven |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110749199A (en) * | 2019-11-06 | 2020-02-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Furnace drying method for titanium-extracting electric furnace from titanium-containing blast furnace slag |
-
2019
- 2019-01-21 CN CN201910052136.XA patent/CN109536669B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110749199A (en) * | 2019-11-06 | 2020-02-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Furnace drying method for titanium-extracting electric furnace from titanium-containing blast furnace slag |
| CN110749199B (en) * | 2019-11-06 | 2021-10-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Furnace drying method for titanium-extracting electric furnace from titanium-containing blast furnace slag |
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| CN109536669B (en) | 2020-12-18 |
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