CN101618969A - Method for preparing compound lining material of blast furnace - Google Patents

Method for preparing compound lining material of blast furnace Download PDF

Info

Publication number
CN101618969A
CN101618969A CN200910089145A CN200910089145A CN101618969A CN 101618969 A CN101618969 A CN 101618969A CN 200910089145 A CN200910089145 A CN 200910089145A CN 200910089145 A CN200910089145 A CN 200910089145A CN 101618969 A CN101618969 A CN 101618969A
Authority
CN
China
Prior art keywords
furnace
lining
powder
admixture
blast furnace
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.)
Pending
Application number
CN200910089145A
Other languages
Chinese (zh)
Inventor
徐利华
郝洪顺
尹航
仉小猛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing University of Technology
University of Science and Technology Beijing USTB
Original Assignee
University of Science and Technology Beijing USTB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by University of Science and Technology Beijing USTB filed Critical University of Science and Technology Beijing USTB
Priority to CN200910089145A priority Critical patent/CN101618969A/en
Publication of CN101618969A publication Critical patent/CN101618969A/en
Pending legal-status Critical Current

Links

Abstract

The invention belongs to the field of fireproof materials and relates to a method for preparing a novel compound lining material used in a blast furnace, in particular to a method for preparing a nonmetal compound lining material used in a furnace body of the blast furnace. The method comprises the following steps: using high-aluminum alumina chamotte, carborundum, metallic silicon powder, silicon ash and artificial graphite as main raw materials, using CA50 fireproof cement as a bonding agent, adding a right amount of admixture, and after mixing and smelting, injecting pulp into a relevant mould for moulding, curing for days and then stripping and baking to obtain the Al2O3-SiC-C compound lining material. The method is favorable to constructing special-shaped brick furnace linings at the weak positions of the furnace body, such as special-shaped edges, corners, holes and the like and enhancing the construction quality, and the whole furnace lining which has no seam after being poured and has uniform structure can not generate looseness and penetrating seams when being heated and used; the method prolongs the service life of the furnace lining, provides superior thermal insulation performance to the furnace body and obviously enhances the effect of energy saving. The compound lining material prepared by using the invention can be widely applied to the furnace abdomen, the furnace waist and the lower part of the furnace body of a smelting blast furnace.

Description

A kind of preparation method of compound lining material of blast furnace
Technical field
The invention belongs to fire resisting material field, relate to a kind of cooling and liner parts of blast furnace, a kind of preparation method of blast furnace NEW TYPE OF COMPOSITE inner lining material is provided, technology simply is easy to control.
Background technology
Blast furnace longevity is not only the needs that Steel Complex keep the production stable equilibrium, also is the needs that reduce production costs, improve the market competitiveness, and therefore, blast furnace longevity is one of problem of being concerned about most of countries in the world ironmaking worker.Depend primarily on restoration of lower stack (comprising furnace bosh and bosh) blast furnace campaign in the present age.Restoration of lower stack mainly be subjected to the rising friction and the souring of coal gas stream are subjected to the erosion of first slag, carbon deposition, the destruction of basic metal and other poisonous metals in the furnace charge.Carbon deposition is meant that coal gas is in the breather hole intrusion bricking of puzzle joint and furnace lining self, under suitable temperature 400-800 ℃, resolve into carbonic acid gas and separate out carbon, the thread carbon of this one-tenth is infinite expanding under optimum conditions, causes that bricking is loosely organized, strength degradation, be full of cracks and destroy.As containing ferric oxide in the bricking,, make its side separate and separate out more serious then as catalyzer.This is one of destroyed major reason of restoration of lower stack bricking.Alkalimetal oxide in the furnace charge can form low melting component with bricking, makes it more easy to wear, and the prussiate that basic metal and coke form oozes in people's brick, form solid carbon and destroy bricking, in addition, alkali metal compound can influence bricking intensity, the bricking of fluorine cpd strong erosion.Therefore, in blast-furnace smelting, bosh, furnace bosh and restoration of lower stack are erosive wear, thermal load maximum, the position that chemical erosion is the most serious, and the erosion of bricking is the fastest, generally can only keep about 6 months, at most also can only keep 1 year.After eating away, bricking just rely on cooling apparatus to keep production fully.When cooling apparatus is a large amount of damaged (generally in blow-on after 2 years), just can in stove, leak in a large number, the coke ratio that ironmaking is produced raises.The back is handled untimelyly if leak in a large number, and (hearth freeze-up or iron mouth come to tap a blast furnace behind the water and blast) also can cause a serious accident.Simultaneously, cooling apparatus leaks in stove, and carbonaceous material that also can the oxidation blast furnace lining causes cupola well carbonaceous material air retaining wall to damage in advance.When the cooling apparatus of breakage is forced to Guan Shui, after cutting off the water supply, just can be burnt very soon, cause furnace shell to lose protection and deform, ftracture.Fetching water when the outside also is difficult to keep when safety in production, just need be forced to carry out big or middle repairing.In view of this, depend on the work-ing life of cooling apparatus the work-ing life of blast furnace to a great extent.
This part the bricking of blast furnace stack bottom must good thermal shock, high temperature resistant, and alkali-resistivity is good, and anti-slag action ability is strong, wear-resisting, anti-oxidant, heat conductance is good.At present, the refractory materials that this position is used mainly contains: the silicon carbide brick of clay brick, corundum brick, aluminum-carbon brick, silicon nitride or the silicon nitride bonded silicon of high alumina brick, impregnation of phosphoric acid salt, graphite-silicon carbide brick, carbon brick etc., but problem loosening and the perforation seam all inevitably can appear.
Summary of the invention
The present invention seeks to adapting to the working conditions of blast furnace stack bottom, a kind of good thermal shock, high temperature resistant is provided, alkali-resistivity is good, anti-slag action ability is strong, the compound Lining wear-resisting, anti-oxidant, that heat conductance is good, the work-ing life of prolongation furnace lining, for body of heater provides the excellent insulating performance, improve energy-saving effect.
A kind of preparation method of compound lining material of blast furnace, it is characterized in that adopting the method for integrated poured moulding to prepare compound Lining, with bauxite chamotte, silicon carbide, metallic silicon power, silicon ash, synthetic graphite is main raw material, with the CA50 refractory cements is wedding agent, add an amount of admixture, after an amount of time of mixing, slurry is injected the related die moulding, after the maintenance a few days, promptly obtain Al of the present invention through the demoulding, baking 2O 3-SiC-C composite lining material.Technical process is as follows:
1, used bone meal material chemical formulation and grain composition are: (weight %)
Bauxite chamotte: Al 2O 3〉=84%, 3-1.43mm, coarse aggregate, 27-35%
1.43-0.45mm, middle aggregate, 3-7%
0.45-0.088mm, fine aggregate, 17-25%
<0.088mm, powder, 5-9%
Silicon carbide: SiC 〉=90%, 3-1.43mm, coarse aggregate, 6-12%
1.43-0.45mm, middle aggregate, 1-4%
0.45-0.088mm, fine aggregate, 2-6%
<0.088mm, powder, 1-3%
CA50 refractory cements: Al 2O 3〉=55%,<0.088mm, powder, 5-12%
Metallic silicon power: Si 〉=97%,<0.088mm, powder, 3-7%
Silicon ash: SiO 2〉=92%,<0.088mm, powder, 1-5%
Synthetic graphite:<0.088mm, powder, 2-7%
2, be that benchmark adds admixture and water with all solids powder, admixture classification and outer dosage: (weight %) tripoly phosphate sodium STPP (STP)+sodium polyacrylate (PAANa): 0.05-0.15%+0.01-0.1% or STP+ naphthalene water reducer (NTD): 0.05-0.15%+0.01-0.1% or STP:0.05-0.3% water: 5-15%
3, bone meal material and admixture thorough mixing in 1 and 2 is even;
4, the slurry that mixes in 3 is injected die for molding, behind the casting to initial set natural curing, 20 ℃ of moist showering curings of normal temperature after the initial set, the demoulding then in 110 ℃ of baking 24h, promptly obtains Al of the present invention 2O 3-SiC-C composite lining material.
The present invention adopts integrated poured moulding to prepare the NEW TYPE OF COMPOSITE furnace lining, build comparison by laying bricks or stones with traditional refractory brick, have following characteristics: the monolithic lining of no seam, even structure does not produce loosening in heating is used and connects the special shaped brick furnace lining that stitches, helps body of heater weak parts such as heterotype edge, angle, hole and builds, improves construction quality by laying bricks or stones after the cast; Prolonged the work-ing life of furnace lining,, obviously improved energy-saving effect for body of heater provides the excellent insulating performance.
Embodiment
Embodiment 1
Used bone meal material chemical formulation and grain composition are: (weight %) bauxite chamotte: 3-1.43mm 28%, 1.43-0.45mm 6%, 0.45-0.088mm 19%,<0.088mm8%, silicon carbide: 3-1.43mm 8%, 1.43-0.45mm 2.5%, 0.45-0.088mm 5%,<0.088mm2.5%, CA50 refractory cements:<0.088mm 7%, metallic silicon power:<0.088mm 5.5%, silicon ash:<0.088mm2.5%, synthetic graphite:<0.088mm 6%.
Used admixture classification and outer dosage: (weight %)
STP+NTD:0.1%+0.05%, water: 8%.
Above-mentioned bone meal material and admixture thorough mixing is even;
The above-mentioned slurry that mixes is injected die for molding, behind the casting to initial set natural curing, 20 ℃ of moist showering curings of normal temperature after the initial set, the demoulding then in 110 ℃ of baking 24h, promptly obtains Al of the present invention 2O 3-SiC-C composite lining material.
Embodiment 2
Used bone meal material chemical formulation and grain composition are: (weight %)
Bauxite chamotte: 3-1.43mm 30%, 1.43-0.45mm 5%, 0.45-0.088mm 20%,<0.088mm7%, silicon carbide: 3-1.43mm 8.5%, 1.43-0.45mm 2%, 0.45-0.088mm 4.5%,<0.088mm2%, CA50 refractory cements:<0.088mm 8%, metallic silicon power:<0.088mm 5%, silicon ash:<0.088mm3%, synthetic graphite:<0.088mm 5%.
Used admixture classification and outer dosage: (weight %)
STP+PAANa:0.1%+0.03%, water: 9%.
Above-mentioned bone meal material and admixture thorough mixing is even;
The above-mentioned slurry that mixes is injected die for molding, behind the casting to initial set natural curing, 20 ℃ of moist showering curings of normal temperature after the initial set, the demoulding then in 110 ℃ of baking 24h, promptly obtains Al of the present invention 2O 3-SiC-C composite lining material.
Embodiment 3
Used bone meal material chemical formulation and grain composition are: (weight %)
Bauxite chamotte: 3-1.43mm 31%, 1.43-0.45mm 4.5%, 0.45-0.088mm 21%,<0.088mm 6%, silicon carbide: 3-1.43mm 7%, 1.43-0.45mm 3%, 0.45-0.088mm 3.5%,<0.088mm 1.5%, CA50 refractory cements:<0.088mm 7.5%, metallic silicon power:<0.088mm 4.5%, silicon ash:<0.088mm 3.5%, synthetic graphite:<0.088mm 7%.
Used admixture classification and outer dosage: (weight %)
STP:0.2%, water: 10%.
Above-mentioned bone meal material and admixture thorough mixing is even;
The above-mentioned slurry that mixes is injected die for molding, behind the casting to initial set natural curing, 20 ℃ of moist showering curings of normal temperature after the initial set, the demoulding then in 110 ℃ of baking 24h, promptly obtains Al of the present invention 2O 3-SiC-C composite lining material.

Claims (1)

1. the preparation method of a blast furnace NEW TYPE OF COMPOSITE inner lining material, with bauxite chamotte, silicon carbide, metallic silicon power, silicon ash, synthetic graphite is main raw material, is wedding agent with the CA50 refractory cements, adds an amount of admixture, adopt integrated poured moulding, it is characterized in that:
A. used bone meal material chemical formulation and grain composition are: (weight %)
Bauxite chamotte: Al 2O 3〉=84%, 3-1.43mm, coarse aggregate, 27-35%
1.43-0.45mm, middle aggregate, 3-7%
0.45-0.088mm, fine aggregate, 17-25%
<0.088mm, powder, 5-9%
Silicon carbide: SiC 〉=90%, 3-1.43mm, coarse aggregate, 6-12%
1.43-0.45mm, middle aggregate, 1-4%
0.45-0.088mm, fine aggregate, 2-6%
<0.088mm, powder, 1-3%
CA50 refractory cements: Al 2O 3〉=55%,<0.088mm, powder, 5-12%
Metallic silicon power: Si 〉=97%,<0.088mm, powder, 3-7%
Silicon ash: SiO 2〉=92%,<0.088mm, powder, 1-5%
Synthetic graphite:<0.088mm, powder, 2-7%
B. be that benchmark adds admixture and water with all solids powder, used admixture classification and outer dosage: (weight %) tripoly phosphate sodium STPP STP+ sodium polyacrylate PAANa:0.05-0.15%+0.01-0.1% or STP+ naphthalene water reducer NTD:0.05-0.15%+0.01-0.1% or STP:0.05-0.3%.
Water: 5-15%;
C. above-mentioned bone meal material and admixture thorough mixing is even;
D. the above-mentioned slurry that mixes is injected die for molding, behind the casting to initial set natural curing, 20 ℃ of moist showering curings of normal temperature after the initial set, the demoulding then in 110 ℃ of baking 24h, promptly obtains Al of the present invention 2O 3-SiC-C composite lining material.
CN200910089145A 2009-07-31 2009-07-31 Method for preparing compound lining material of blast furnace Pending CN101618969A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200910089145A CN101618969A (en) 2009-07-31 2009-07-31 Method for preparing compound lining material of blast furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200910089145A CN101618969A (en) 2009-07-31 2009-07-31 Method for preparing compound lining material of blast furnace

Publications (1)

Publication Number Publication Date
CN101618969A true CN101618969A (en) 2010-01-06

Family

ID=41512392

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200910089145A Pending CN101618969A (en) 2009-07-31 2009-07-31 Method for preparing compound lining material of blast furnace

Country Status (1)

Country Link
CN (1) CN101618969A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102924097A (en) * 2012-11-01 2013-02-13 李富朝 Carbon titanium combining self-protection brick for blast furnace hearth and furnace bottom
CN105036622A (en) * 2015-07-08 2015-11-11 安徽省溜口新型建筑材料有限公司 Aerated brick containing bone meal
CN105669212A (en) * 2014-11-19 2016-06-15 无锡市德林环保工程有限公司 High-temperature resistant and anti-corrosion castable for power station boilers
CN106435073A (en) * 2016-11-11 2017-02-22 武汉宏程冶金材料有限公司 Blast furnace liner overall pouring construction method for replacing spraying materials and refractory bricks
CN108821786A (en) * 2018-07-12 2018-11-16 佛山市高捷工业炉有限公司 The preparation method of electromagnetic welding inner lining of furnace composite material
CN108840672A (en) * 2018-07-12 2018-11-20 佛山市高捷工业炉有限公司 A kind of electromagnetic welding inner lining of furnace composite material
CN109206144A (en) * 2018-10-30 2019-01-15 苏州佳耐材料科技有限公司 A kind of preparation and detection method of Ultra-low carbon aluminum-carbon refractory material

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102924097A (en) * 2012-11-01 2013-02-13 李富朝 Carbon titanium combining self-protection brick for blast furnace hearth and furnace bottom
CN102924097B (en) * 2012-11-01 2014-05-14 郑州安耐克实业有限公司 Carbon titanium combining self-protection brick for blast furnace hearth and furnace bottom
CN105669212A (en) * 2014-11-19 2016-06-15 无锡市德林环保工程有限公司 High-temperature resistant and anti-corrosion castable for power station boilers
CN105036622A (en) * 2015-07-08 2015-11-11 安徽省溜口新型建筑材料有限公司 Aerated brick containing bone meal
CN106435073A (en) * 2016-11-11 2017-02-22 武汉宏程冶金材料有限公司 Blast furnace liner overall pouring construction method for replacing spraying materials and refractory bricks
CN106435073B (en) * 2016-11-11 2018-07-03 武汉宏程冶金材料有限公司 A kind of blast furnace lining monolithic casting construction method for substituting spray paint and refractory brick
CN108821786A (en) * 2018-07-12 2018-11-16 佛山市高捷工业炉有限公司 The preparation method of electromagnetic welding inner lining of furnace composite material
CN108840672A (en) * 2018-07-12 2018-11-20 佛山市高捷工业炉有限公司 A kind of electromagnetic welding inner lining of furnace composite material
CN109206144A (en) * 2018-10-30 2019-01-15 苏州佳耐材料科技有限公司 A kind of preparation and detection method of Ultra-low carbon aluminum-carbon refractory material

Similar Documents

Publication Publication Date Title
CN101618969A (en) Method for preparing compound lining material of blast furnace
CN102249698B (en) Blast furnace cooling wall laying brick
CN101239830A (en) Low-temperature burning high-aluminum refractory brick and preparation method thereof
CN104291844B (en) A kind of preparation method of blast furnace iron mouth mud cover of longevity
CN101811881A (en) MgO-C material slag line brick for steel ladle
CN100478306C (en) High-alumina electric furnace cover pouring material and preparation method thereof
CN105347824A (en) Preparation method of cold ramming paste specially used for submerged arc furnace whole furnace construction
CN105859314B (en) A kind of smelting molten steel equipment carbon containing gunning refractory and preparation method thereof
CN106747505A (en) A kind of carbon-free converter material for repairing
CN106336227A (en) Minerals waste refractory material and preparation technology thereof
CN101798232B (en) Preparation method of Sialon-carbofrax-corundum composite refractory material
CN102417357A (en) Pyrophyllite-silicon carbide carbon brick for ladle and preparation method thereof
CN102020474B (en) High temperature low heat conduction refractory material and production process thereof
CN103073316B (en) Gunning mix for main iron runner of blast furnace and preparation method thereof
CN103936443A (en) Novel micropore corundum brick and preparation method thereof
CN105950822A (en) High-fire-proof slag-stopping ball used for converter steelmaking and preparation method thereof
CN105801147A (en) Method for repairing torpedo ladle in thermal state
CN102251066B (en) Cooling wall with pre-coated slag crust
CN110128119A (en) Blast furnace main iron channel castable and processing method and the method for preparing main trough of blast furnace
CN108558370A (en) A kind of CMA cement combination MgO-MA unburned bricks and preparation method thereof
CN109437932A (en) A kind of magnesia diffusion-type breathable refractory materials and preparation method thereof
CN101402527A (en) Compact aluminum silicon carbide composite material and method of manufacturing the same
CN106977214A (en) A kind of Large face repair material of converter and preparation method thereof
CN105601306A (en) Unshaped refractory material for zinc oxide rotary kiln and production technology for lining bricks
CN104557065B (en) High heat conduction brick fuel

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
WD01 Invention patent application deemed withdrawn after publication

Open date: 20100106

C02 Deemed withdrawal of patent application after publication (patent law 2001)