CN106083089A - A kind of blast furnace dam material and preparation, damming method - Google Patents
A kind of blast furnace dam material and preparation, damming method Download PDFInfo
- Publication number
- CN106083089A CN106083089A CN201610444575.1A CN201610444575A CN106083089A CN 106083089 A CN106083089 A CN 106083089A CN 201610444575 A CN201610444575 A CN 201610444575A CN 106083089 A CN106083089 A CN 106083089A
- Authority
- CN
- China
- Prior art keywords
- blast furnace
- dam
- parts
- runner
- dam material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims description 10
- 238000002360 preparation method Methods 0.000 title claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 109
- 229910052742 iron Inorganic materials 0.000 claims abstract description 49
- 239000002893 slag Substances 0.000 claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 15
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 11
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 11
- 235000014380 magnesium carbonate Nutrition 0.000 claims abstract description 11
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 11
- 239000004576 sand Substances 0.000 claims abstract description 11
- 229910052845 zircon Inorganic materials 0.000 claims abstract description 11
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000012760 heat stabilizer Substances 0.000 claims abstract description 8
- 239000000080 wetting agent Substances 0.000 claims abstract description 8
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 5
- 241000219098 Parthenocissus Species 0.000 claims description 3
- 238000000889 atomisation Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000012800 visualization Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 2
- 238000002372 labelling Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000010079 rubber tapping Methods 0.000 abstract description 6
- 230000007812 deficiency Effects 0.000 abstract description 3
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 230000003628 erosive effect Effects 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/04—Blast furnaces with special refractories
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/14—Discharging devices, e.g. for slag
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Blast Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The present invention provides a kind of blast furnace dam material, and the weight portion of the described blast furnace each component of dam material is: fused magnesite 26 35 parts, crystalline graphite powder 22 28 parts, dicalcium powder 30 36 parts, zircon sand 25 parts, silicon carbide micro-powder 35 parts, oiliness wetting agent 24 parts, heat stabilizer 13 parts, 24 parts of water；This programme efficiently solves tradition blast furnace iron runner, the deficiency of slag runner dam material, overcome tradition dam material insufficient formability comprehensively, easily ooze ferrum, easily break down, easily run ferrum, not antiscour, be weak to corrode, easy integral sintered affect the later stage and stab the drawback such as dam, greatly steady along the production of tapping a blast furnace of blast furnace, significantly reduce hand labor intensity and production cost, effectively ensure the production safety of blast furnace, its market space is wide, and promotional value is huge.
Description
Technical field:
The present invention relates to metallurgical ironmaking technology field, refer in particular to the iron runner in blast furnace cast house molten iron tap drain region, slag runner
Blast furnace dam material that place builds a dam used and use technology accordingly.
Background technology:
The maximization of blast furnace at present and the high intensity of blast furnace smelt the development trend having become industry, and when tapping a blast furnace, molten iron temperature is high,
Scum amount is big, tap a blast furnace, the slag time is long, causes the use condition of iron tap channel refractory material to become extremely harsh, special recent years
The restoration and reuse of iron storage type iron tap channel proposes new requirement the most once again with popularizing use of building a dam blast furnace dam material in an all-round way.
Blast furnace tapping main channel work under bad environment, after tapping hole opening, moment slag iron is big, and temperature is high, and erosion is strong, and
Iron storage type iron tap channel is effectively layered according to autologous density to allow slag, ferrum, it is necessary to just reach certain capacity to start earial drainage, main
Ditch slag ferrum capacity drop is high, and pressure is very big, and traditional dam material cannot meet production requirement, often occur dam body ooze ferrum,
Break down in advance, run the production accidents such as ferrum, give and produce surely along causing major hidden danger with safety.
Traditional iron runner dam material drawback under blast fumance technique now is the most fairly obvious, at all cannot be with blast furnace
Producing supporting synchronization, traditional dam material material is single, and insufficient formability, time of building a dam are long, and closely or easily sintering causes
The tailings earial drainage stage manually cannot and time stamp dam, long-time anti-thermal shock, antiscour, Erosion resistance can be poor, are susceptible to break down, wash
The situations such as dam, it is impossible to meet production requirement.
Summary of the invention:
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that one is with low cost, constructing operation convenient, easy-formation,
Exempt from baking, anti-sintering, impermeable, antiscour, resistance to corrode, and during use of building a dam, trough very can be realized once
Property cutout, slag runner after building a dam does not breaks down during using, does not wash dam, and the later stage lets out slag and can stab dam, dam body noresidue the most easily
Do not block up slag, do not delay the methods such as production time and be applied to the blast furnace dam material of the method.
For achieving the above object, technical scheme provided by the present invention is: a kind of blast furnace dam material, described blast furnace dam material
The weight portion of each component is: fused magnesite 26-35 part, crystalline graphite powder 22-28 part, dicalcium powder 30-36 part, zircon sand 2-5 part,
Silicon carbide micro-powder 3-5 part, oiliness wetting agent 2-4 part, heat stabilizer 1-3 part, water 2-4 part；
The preparation technology of above-mentioned formula is:
1) put into electromagnetic speed-adjusting disintegrating machine, in proportion by fused magnesite to carry out medium speed and crush, and completed by fines reciprocating sieve
Multilamellar sorts, and the material thickness chosen after sorting accounts for 60%-70% than accounting for 30-40%, 1-2.0mm for 0-1.0mm；
2) put into electromagnetic speed-adjusting disintegrating machine, in proportion by zircon sand to carry out high rotating speed and crush, and completed point by fines reciprocating sieve
Choosing, the grain thickness of chosen material is 0-1.0mm；
3) fused magnesite, chosen above-mentioned in proportion, zircon sand, the scale graphite powder of-80 mesh ,-600 mesh silicon carbide micro-powders are put
Entering closed mixer mix and blend, mixing time is 6-10 minute；
4), mixer closed cover is opened, stirring at low speed, with the sprinkler head of atomization, material carried out profitization of spraying water, the profitization time is
2-3 minute.
5) adding the machine that the stirs mix and blend again after profitization, in proportion by the dicalcium powder of-100 mesh, mixing time 2-3 is divided
Clock.
6), the most in proportion oiliness wetting agent, heat stabilizer are added in the batch mixing of the 5th step, and carry out continuous stirring,
Mixing time 3-6 minute.
7), by complete for mixing, the material PE woven bag packaging stirred, weight per package is 20Kg/ bag, then pastes
Mark, cross inspection,；
Use above-mentioned blast furnace dam material to carry out the damming method at iron runner, slag runner to be:
First step: situ visualization iron runner molten iron situation, blocks at blast-melted mouth, and iron runner molten iron waterline is shallower, flow
Not quite, should promptly throw in a bag blast furnace dam material in the case of flow velocity is relatively slow to stop；
Second step: adding a bag dam material again after molten iron stops, with semi-circular cusp spade drawout, groove both sides are built a little more
Material；
Third step: treat that pulp water flows to end at slag runner mouth, furrow bank both sides, bottom of trench residue spade are cleaned out；
4th step: throw in 3-4 bag blast furnace dam material at slag runner mouth, build up an inverted trapezoidal cube, the long 40-48cm in the upper end,
Wide 15-22cm, go to the bottom long 25-30cm, wide 25-32cm, high 30-35cm；Inside and outside two ends spade ramming, flattens above；
5th step: iron runner taps a blast furnace, when molten iron reaches certain liquid position, as long as slightly disclosing dam body, dam body with creeper
Collapse and can put molten iron；
6th step: slag runner early stage slag tap all on dam body overflow go over, treat that molten iron discharging arrives final stage, tailings is wanted all
During earial drainage, protruding into slag runner mouth dam body with point mouth iron, be repeated several times, dam body collapses, and tailings can flow to end.
The invention has the advantages that:
Solve tradition blast furnace iron runner, slag runner dam material effect instability, insufficient formability, non-resistance to erosion pointedly, be weak to
Corrode, dam body easily ooze ferrum, easily break down race ferrum lead to the difficult problems such as production accident, overcome dam body the easiest comprehensively
Integral sintered by high temperature, cause the later stage to be slagged tap and cannot stab dam smoothly, have a strong impact on drawbacks such as normally slagging tap.And this programme implements letter
Just, with low cost, tradition dam material is carried out effective upgrading, by specialized material, professional construction, has produced with blast furnace casting
Harmonious, for ironmaking, skilled worker precisely controls blast furnace casting, slagging tap provides robust techniques guarantee, and its market space is wide, pushes away
Wide Huge value.
Detailed description of the invention
The invention will be further described below, and presently preferred embodiments of the present invention is:
The raw materials for production of the blast furnace dam material described in the present embodiment select fused magnesite (0-2.0mm), scale graphite powder (-80
Mesh), dicalcium powder (-100 mesh), zircon sand (0-1.0mm), silicon carbide micro-powder (-600 mesh), oiliness wetting agent, heat stabilizer.
Its component and percentage by weight be fused magnesite 26 parts, 22 parts of scale graphite powder, dicalcium powder 34 parts, zircon sand 4 parts,
Silicon carbide micro-powder 5 parts, oiliness wetting agent 3 parts, heat stabilizer 2 parts, 4 parts of water.
Described blast furnace dam material manufacturing technique is:
1, carried out medium speed by metering and crush than fused magnesite being put into electromagnetic speed-adjusting disintegrating machine, and completed by fines reciprocating sieve
Multilamellar sorts, and the material thickness chosen after sorting accounts for 40% than for 0-1.0mm, and 1-2.0mm accounts for 60%.
2, carried out high rotating speed by metering and crush than zircon sand being put into electromagnetic speed-adjusting disintegrating machine, and complete by fines reciprocating sieve
Become sorting, it is ensured that the material granule thickness chosen controls in 0-1.0mm.
3, by metering than the fused magnesite chosen above-mentioned, zircon sand, the scale graphite powder of-80 mesh ,-600 mesh carborundums
Micropowder, put into closed mixer mix and blend, 8 minutes time.
4, open mixer closed cover, stirring at low speed, with the sprinkler head of atomization, material is carried out profitization of spraying, time 3 points
Clock.
5, by metering ratio by-100 mesh dicalcium powder mixer mix and blends, 2 minutes time.
6, by measuring ratio by oiliness wetting agent, heat stabilizer with addition of entering, continuous stirring, 5 minutes time.
7, by complete for mixing, the material PE woven bag packaging stirred, weight is 20Kg/ bag.
Blast furnace dam material finished chemical index (filling numerical bias ± 5 perhaps)
| The project indicator | MgO | CaO | C fixed carbon | ZrO2 | Other |
| Content | 17% | 24% | 18% | 2.4% | -- |
Using blast furnace dam material as above to carry out the damming method at iron runner, slag runner, it includes following steps:
1, situ visualization iron runner molten iron situation, blocks at blast-melted mouth, and iron runner molten iron waterline is shallower, and flow is little, stream
In the case of speed is relatively slow, a urgent bag blast furnace dam material of throwing in stops.
2, adding a bag dam material again after molten iron stops, with semi-circular cusp spade drawout, more groove both sides are built and are expected,
Without ramming.
3, treating that pulp water flows to end at slag runner mouth, furrow bank both sides, bottom of trench residue spade are cleaned out.
4, throw in 3 bag blast furnace dam material at slag runner mouth, build up an inverted trapezoidal cube, the long 45cm in the upper end, wide 16cm, under
The long 28cm in the end, wide 30cm, high 33cm.Inside and outside two ends spade ramming, flattens above.
5, when iron runner molten iron reaches certain liquid position, as long as slightly disclose dam body with creeper, dam body collapses and can put
Molten iron.
6, slag runner slag tap early stage all on dam body overflow go over, treat that molten iron discharging arrives final stage, tailings all to be let out
During stream, protruding into slag runner mouth dam body with point mouth iron, be repeated several times, dam body collapses, and tailings can flow to end.
Owing to building a dam at iron runner mouth is mainly put the ferrum time play cutout effect non-, and blast furnace dam material material is closely knit,
Anti-molten iron permeability is strong so only needing heap to build, it is not necessary to compacting, discloses dam, and the dam of slag runner mouth will hold for a long time when conveniently putting molten iron
Washed away by high temperature pulp water, corrode, so use ramming mode of building a dam, dam body is built into the long 45cm in the upper end, wide 16cm, under
This shape of inverted trapezoidal cube of the long 28cm in the end, wide 30cm, high 33cm, can be greatly enhanced dam body steadiness, prevent tapping hole
Opening error causes the impact that molten iron moment tidal bore brings.This programme efficiently solves tradition blast furnace iron runner, slag runner dam material
Deficiency, overcome comprehensively tradition dam material insufficient formability, easily ooze ferrum, easily break down, easily run ferrum, not antiscour, be weak to corrode,
Drawback such as easy integral sintered impact stamp dam etc., greatly steady along productions of tapping a blast furnace of blast furnace, significantly reduce hand labor intensity with
Production cost, has effectively ensured the production safety of blast furnace, and its market space is wide, and promotional value is huge.
The embodiment of the above is only the preferred embodiments of the invention, not limits the practical range of the present invention with this,
Therefore the change that all shapes according to the present invention, principle are made, all should contain within the scope of the present invention.
Claims (1)
1. a blast furnace dam material, it is characterised in that: the weight portion of the described blast furnace each component of dam material is: fused magnesite 26-35
Part, crystalline graphite powder 22-28 part, dicalcium powder 30-36 part, zircon sand 2-5 part, silicon carbide micro-powder 3-5 part, oiliness wetting agent 2-4
Part, heat stabilizer 1-3 part, water 2-4 part；
The preparation technology of above-mentioned formula is:
1) put into electromagnetic speed-adjusting disintegrating machine, in proportion by fused magnesite to carry out medium speed and crush, and completed by fines reciprocating sieve
Multilamellar sorts, and the material thickness chosen after sorting accounts for 60%-70% than accounting for 30-40%, 1-2.0mm for 0-1.0mm；
2) put into electromagnetic speed-adjusting disintegrating machine, in proportion by zircon sand to carry out high rotating speed and crush, and completed point by fines reciprocating sieve
Choosing, the grain thickness of chosen material is 0-1.0mm；
3) fused magnesite, chosen above-mentioned in proportion, zircon sand, the scale graphite powder of-80 mesh ,-600 mesh silicon carbide micro-powders are put
Entering closed mixer mix and blend, mixing time is 6-10 minute；
4), mixer closed cover is opened, stirring at low speed, with the sprinkler head of atomization, material carried out profitization of spraying water, the profitization time is
2-3 minute.
5) machine that the stirs mix and blend again after profitization, mixing time 2-3 minute are added, in proportion by the dicalcium powder of-100 mesh.
6), the most in proportion oiliness wetting agent, heat stabilizer are added in the batch mixing of the 5th step, and carry out continuous stirring, stirring
3-6 minute time.
7), by complete for mixing, the material PE woven bag packaging stirred, weight per package is 20Kg/ bag, then labeling, mistake
Inspection,；
Use above-mentioned blast furnace dam material to carry out the damming method at iron runner, slag runner to be:
First step: situ visualization iron runner molten iron situation, blocks at blast-melted mouth, and iron runner molten iron waterline is shallower, flow
Not quite, should promptly throw in a bag blast furnace dam material in the case of flow velocity is relatively slow to stop；
Second step: adding a bag dam material again after molten iron stops, with semi-circular cusp spade drawout, groove both sides are built a little more
Material；
Third step: treat that pulp water flows to end at slag runner mouth, furrow bank both sides, bottom of trench residue spade are cleaned out；
4th step: throw in 3-4 bag blast furnace dam material at slag runner mouth, build up an inverted trapezoidal cube, the long 40-48cm in the upper end,
Wide 15-22cm, go to the bottom long 25-30cm, wide 25-32cm, high 30-35cm；Inside and outside two ends spade ramming, flattens above；
5th step: iron runner taps a blast furnace, when molten iron reaches certain liquid position, as long as slightly disclosing dam body, dam body with creeper
Collapse and can put molten iron；
6th step: slag runner early stage slag tap all on dam body overflow go over, wait to tap a blast furnace to final stage, tailings all to be let out
During stream, protruding into slag runner mouth dam body with point mouth iron, be repeated several times, dam body collapses, and tailings can flow to end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610444575.1A CN106083089B (en) | 2016-06-21 | 2016-06-21 | A kind of blast furnace dam material and its preparation, damming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610444575.1A CN106083089B (en) | 2016-06-21 | 2016-06-21 | A kind of blast furnace dam material and its preparation, damming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106083089A true CN106083089A (en) | 2016-11-09 |
| CN106083089B CN106083089B (en) | 2018-06-12 |
Family
ID=57237546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610444575.1A Expired - Fee Related CN106083089B (en) | 2016-06-21 | 2016-06-21 | A kind of blast furnace dam material and its preparation, damming method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106083089B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104163637A (en) * | 2013-05-17 | 2014-11-26 | 登封市宏源耐火材料有限公司 | Carbon composite fireproof material for blast furnace iron runner and preparation method thereof |
| CN104844227A (en) * | 2014-07-30 | 2015-08-19 | 长兴攀江冶金材料有限公司 | Alumina-magnesia based slag blocking wall |
| CN105503212A (en) * | 2015-12-21 | 2016-04-20 | 江苏苏嘉集团新材料有限公司 | Magnesia carbon brick and preparation method thereof |
| CN105622069A (en) * | 2015-12-31 | 2016-06-01 | 海城市中兴高档镁质砖有限公司 | Zirconium compounding magnesium-calcium-iron ramming material and preparation method thereof |
-
2016
- 2016-06-21 CN CN201610444575.1A patent/CN106083089B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104163637A (en) * | 2013-05-17 | 2014-11-26 | 登封市宏源耐火材料有限公司 | Carbon composite fireproof material for blast furnace iron runner and preparation method thereof |
| CN104844227A (en) * | 2014-07-30 | 2015-08-19 | 长兴攀江冶金材料有限公司 | Alumina-magnesia based slag blocking wall |
| CN105503212A (en) * | 2015-12-21 | 2016-04-20 | 江苏苏嘉集团新材料有限公司 | Magnesia carbon brick and preparation method thereof |
| CN105622069A (en) * | 2015-12-31 | 2016-06-01 | 海城市中兴高档镁质砖有限公司 | Zirconium compounding magnesium-calcium-iron ramming material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 张唐文等: "Al2O3-MgAl2O4-SiC-C质耐火材料组成、结构及性能研究", 《武汉科技大学硕士学位论文》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106083089B (en) | 2018-06-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106811676A (en) | A kind of high-intensity high-tenacity as cast condition QT700 10 and its production method | |
| CN102303108A (en) | Continuous casting production process for improving quality of free cutting steel casting blank | |
| CN107673756B (en) | Mineral hot furnace magnesia anhydrous stemming and preparation method thereof | |
| CN104831153B (en) | The preparation method of V150 grade of steel high-strength tenacity casing steels | |
| CN104789718A (en) | Steel slag recycling method | |
| CN104148625B (en) | A kind of preparation method of refining chromium matter stuffing sand | |
| CN105903915A (en) | Knotting method of casting ingot mold in preparation process of vanadium-iron alloy | |
| CN110042196A (en) | A kind of resistance to material furnace retaining method of coverter pig sizing | |
| CN102001854B (en) | Special steel ladle draining sand for stainless steel and production process thereof | |
| CN104894327A (en) | Converter slag surface furnace lining fettling method | |
| CN108085448A (en) | A kind of production method by continuous casting pattern smelting low-sulfur steel in converter directly | |
| CN101116908A (en) | White olivine ladle draining sand and method for preparing the same | |
| CN103011858B (en) | Stemming for blast furnace tap hole | |
| CN106083089A (en) | A kind of blast furnace dam material and preparation, damming method | |
| CN113070447A (en) | Method for casting oil pressure casting | |
| CN104293994A (en) | Cast steel cooling wall for blast furnace and manufacturing method for cast steel cooling wall | |
| CN104308121B (en) | A kind of preparation method of the filler punctured for high temperature-proof molten steel in casting process | |
| CN107385127B (en) | Improve the process of vanadium titano-magnetite blast furnace process slag iron separation | |
| CN104449864B (en) | A kind of novel water-coal-slurry pressurized-gasification furnace nozzle and manufacture method thereof | |
| CN107326148A (en) | Dephosphorization method for semisteel | |
| CN1180902C (en) | Draining ageng made of chromium | |
| CN102248155A (en) | Refining drainage agent and preparation method thereof | |
| CN103031410B (en) | Method for treating desulfuration residue by preparing efficient blocker with waste materials of steelmaking | |
| CN104593542B (en) | The method of blocking up of electric furnace discharging opening | |
| CN208815049U (en) | A kind of blast furnace ironmaking skimming device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180612 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |