CN105218116A - A kind of chromium-free brick and preparation method thereof - Google Patents
A kind of chromium-free brick and preparation method thereof Download PDFInfo
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- CN105218116A CN105218116A CN201510670471.8A CN201510670471A CN105218116A CN 105218116 A CN105218116 A CN 105218116A CN 201510670471 A CN201510670471 A CN 201510670471A CN 105218116 A CN105218116 A CN 105218116A
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Abstract
The present invention relates to refractory materials and preparation method thereof, be specifically related to a kind of chromium-free brick and preparation method thereof.A kind of chromium-free brick of the present invention, is prepared from by following parts by weight of component: electrosmelted magnesite clinker coarse particles 15 ~ 18 parts; Electrosmelted magnesite clinker fine particle 20 ~ 25 parts; Electrosmelted magnesite clinker fine powder 20 ~ 25 parts; Light-magnesite powder 2 ~ 5 parts; Alpha-alumina micro mist 3 ~ 6 parts; Metallic aluminium 5 ~ 10 parts; 10 ~ 15 parts, electric smelting aluminium riched spinel powder; Electric fused zirconium corundum 10 ~ 15 parts; Liquid phenolic resin 3 ~ 5 parts.Chromium-free brick prepared by the present invention, not only production method is simple, also has that anti-slag is invaded, hot strength large, density comparatively high, and raw material is not containing chromium, and environmentally friendly, its comprehensive use properties is better than magnesia chrome brick.
Description
Technical field
The present invention relates to refractory materials and preparation method thereof, be specifically related to a kind of chromium-free brick and preparation method thereof.
Background technology
Nineteen fifty-seven Thyssen Iron And Steel Company invention vacuum circulation degassing-RH method, the seventies subsequently and the eighties, Japan successively develops RH-OB method, RH-KTB method and RH-PB method, constantly improves the refining function of RH.Along with the purity requirements of market to steel is more and more higher, simultaneously to high-quality steel demand increase, domestic and international most steel mill is all configured with RH a refining unit.RH liner generally adopts magnesia chrome brick, however in high temperature oxidative atmosphere in Cr (III) and slag CaO react and generate Cr (VI), cause environmental pollution.Along with environmental requirement is more and more tighter, chromium-free brick must be developed and substitute magnesia chrome brick, eliminate pollution of chromium, promote green Iron & Steel Development.
Application number is " CN201310552471.9 ", and denomination of invention is " a kind of RH vacuum oven inner lining refractory and preparation method thereof and RH vacuum oven ", discloses a kind of RH vacuum oven inner lining refractory and preparation method thereof and RH vacuum oven.This inner lining refractory, by electrosmelted magnesite clinker, the synthetic graphite processed, antioxidant, resol ratio batching by weight, obtains RH vacuum oven inner lining refractory through mixed grind, pressure forming, thermal treatment process.This patent relates to a kind of low carbon magnesia carbon brick, there is carburetting risk.
Application number is " CN201110091063.9 ", denomination of invention is " a kind of have high resistance to fouling, the RH stove magnesium zirconia block of high-heat resistance shock resistant and production technique thereof ", disclose and a kind of there is high resistance to fouling, the RH stove magnesium zirconia block of high-heat resistance shock resistant and production technique thereof, this brick mass percent is MgO76-90%, ZrO25-21%, firing temperature 1680-1840 DEG C.Technique is: magnesia and zirconium white are through pre-treatment synthesis magnesium zircon sand; Synthesis magnesium zircon sand, electrosmelted magnesite clinker are broken into the particle of 5-3mm, 3-1mm, 1-0mm; In proportion by particulate material, 150-200 object magnesia and magnesium zircon sand powder, 200-250 order zirconium white powder, addition of C aO and Y2O3, binding agent spent pulping liquor powerful homogenizing mixing compression moulding; 120 DEG C of baking 24-72h; Intensification is incubated 3-5h and burns till at 1680-1840 DEG C.In this patent, sintering temperature is 1680-1840 DEG C, and energy consumption is high.
Application number is " CN201110234230.0 ", denomination of invention is " RH refining furnace liner brick and preparation method thereof ", disclose a kind of main ingredient and weight percent is: granularity is the magnesia aggregate of 0.1 ~ 5 millimeter: 55 ~ 70%, the matrix that granularity < is 0.1 millimeter: 30 ~ 45%, the additional sol binder accounting for above-mentioned raw materials total weight percent 2 ~ 5%; Preparation process: be that magnesia aggregate and the sol binder of 0.1 ~ 5 millimeter mixes by granularity; Add the matrix of granularity < 0.1 millimeter and mix; Shaping; Baking; Fire; Insulation; Naturally cool to room temperature, then come out of the stove stand-by.A kind of MgO-ZrO of this patented invention
2-CaO brick, contributes to improving anti-slag and invades and permeate, but there is CaO aquation problem.
Application number is " CN201310475475.1 ", denomination of invention is " a kind of magnesia-spinel brick and preparation method thereof ", disclose a kind of magnesia-spinel brick, by the resin formation of the magnesia of 60 ~ 80 weight parts, the dicalcium sand of 10 ~ 20 weight parts, the Preblend of 10 ~ 20 weight parts and 2 ~ 5 weight parts; Described Preblend comprises: magnesium-rich spinel, activated alumina and metallic silicon power; Described magnesia comprises the different magnesia of two or more particle diameter.This patent introduces metallic silicon power, develops a kind of magnesia-spinel brick of metal-containing powders, adopts post forming to improve density.
Application number is " CN201110124748.9 ", denomination of invention is " one does not burn AluminaSpinel Bricks ", disclose one and do not burn AluminaSpinel Bricks, the percent mass proportioning of its each component is: corundum 50 ~ 80%, aluminum-spinel 5 ~ 30%, magnesia powder 2 ~ 5%, aluminum oxide powder 3 ~ 10%, surplus is at least one in simple substance silica flour, metallic aluminium powder, boron carbide powder, and described each component of not burning AluminaSpinel Bricks is combined by an additional bonding agent.This patent relates to the aluminum-spinel green brick of a kind of containing metal silica flour, aluminium powder, B4C.
Application number is " CN201110392586.7 ", denomination of invention is " super-micro powder combined impervious spinel brick for refining furnace lining and preparation method ", disclose a kind of Chrome-free, high-temperature behavior excellence, thermal shock resistance and wear resistance good, slag-resistant infiltration corrosion excellent performance, the refining furnace super-fine powder of long service life is in conjunction with impervious spinel brick and preparation method.Main idiosome material used is electric smelting aluminium riched spinel 62-66 part, spinel 19-23 part of pre-synthesis, alumina powder 13-17 part; The ratio that the add-on of additional bonding agent accounts for the gross weight of main idiosome material is respectively: bonding agent 3-5%; High-pressure molding, high-temperature activation sintering forms.This patent utilization ultrafine powder combines, and high temperature burns till spinel-Al2O3 brick, and cost is higher.
Application number is " CN201110289991.6 ", denomination of invention is " antiseepage of refining furnace furnace lining metal composite does not burn magnesia-spinel brick and preparation method thereof ", disclose a kind of Chrome-free, high-temperature behavior be excellent, void content is low, resistance to fouling is strong, thermal shock resistance and wear resistance good, the refining furnace furnace lining metal composite antiseepage of slag-resistant penetrating quality excellence does not burn magnesia-spinel brick.Main blank of material of the present invention by magnesite clinker (content of MgO>=94%) and electrosmelted magnesite clinker (content of MgO is>=94%) one or more, add pre-synthesis spinel (electric smelting and sintering spinel one or more, Al
2o
3content 60-90%), 1-6 kind metal object one or more as additive, organism is as bonding agent.This patent introduces metal Ti, Si, Zn etc., is formed and does not impermeablely burn magnesia-spinel brick.
Comprehensive above patent is known, and in prior art, additive adds mainly with powder mode greatly, contact abundant not, thus sintering process is difficult to form high strength bond with macrobead between the two.
Summary of the invention
In order to solve the problem, first technical problem to be solved by this invention is to provide a kind of intensity, density and anti-slag and invades all higher chromium-free brick of performance.
A kind of chromium-free brick of the present invention, is prepared from by following parts by weight of component:
Wherein, 5mm≤electrosmelted magnesite clinker coarse particles particle diameter≤8mm, 3mm≤electrosmelted magnesite clinker fine particle particle diameter < 5mm, 1mm≤electrosmelted magnesite clinker fine powder particle diameter < 3mm.
Further, as preferred technical scheme, a kind of chromium-free brick described above, is prepared from by following parts by weight of component:
A kind of chromium-free brick described above, wherein MgO > 97wt%, CaO < 1wt%, SiO in electrosmelted magnesite clinker
2< 1wt%; Light-magnesite powder particle diameter < 0.074mm, and wherein MgO>=80wt%, CaO≤2wt%, SiO
2≤ 2wt%; Metallic aluminium purity > 98%; Electric smelting aluminium riched spinel powder footpath < 0.074mm; 0.074mm≤electric fused zirconium corundum≤1mm.
Second technical problem to be solved by this invention is to provide a kind of method preparing above-mentioned chromium-free brick.
Prepare the method for chromium-free brick described above, comprise the following steps:
A, by electrosmelted magnesite clinker coarse particles, electrosmelted magnesite clinker fine particle and electrosmelted magnesite clinker fine powder mix, be preheated to more than 550 DEG C, obtain magnesia compound;
B, metallic aluminium after melting, is joined in magnesia compound at 700 ~ 720 DEG C, mixing, in whole magnesia particle surface-coated till sheet metal aluminium;
C, add electric fused zirconium corundum, electric smelting aluminium riched spinel powder, Alpha-alumina micro mist and light-magnesite powder successively, mixing 40 ~ 60min, then add liquid phenolic resin, more mixed 35 ~ 45min, obtain chromium-free brick compound;
D, chromium-free brick compound step c obtained make chromium-free brick adobe at 800MPa pressure, after 100 ~ 120 DEG C of drying 20 ~ 36h, at 200 ~ 300 DEG C of thermal treatment 10 ~ 15h, obtain chromium-free brick.
Further, the described above method preparing chromium-free brick, in order to reduce workload, saves time and cost, make mixture mix simultaneously evenly, in a step, mixing preferably adopts batch mixing 10min in the mortar mixer of rotating speed 80 ~ 150rpm.
The described above method preparing chromium-free brick, in Step d, chromium-free brick adobe is preferably through 110 DEG C of dry 24h.
The present invention is by being coated with layer of metal or metal alloy in electrosmelted magnesite clinker particle surface selectivity, reaction in－situ is formed after high temperature oxidation, promote the sintering between particle and matrix, reach the object improving intensity and density, meanwhile introduce zirconium-containing material raising anti-slag and invade performance.Compared to existing technology, RH liner chromium-free brick prepared by the present invention not only production method is simple, also has that anti-slag is invaded, hot strength large, density comparatively high, because raw material is not containing chromium, environmentally friendly, can not damage environment and people and animals, its comprehensive use properties is better than magnesia chrome brick.
Embodiment
A kind of chromium-free brick of the present invention, is prepared from by following parts by weight of component:
Wherein, 5mm≤electrosmelted magnesite clinker coarse particles particle diameter≤8mm, 3mm≤electrosmelted magnesite clinker fine particle particle diameter < 5mm, 1mm≤electrosmelted magnesite clinker fine powder particle diameter < 3mm.
Further, as preferred technical scheme, a kind of chromium-free brick described above, is prepared from by following parts by weight of component:
A kind of chromium-free brick described above, wherein MgO > 97wt%, CaO < 1wt%, SiO in electrosmelted magnesite clinker
2< 1wt%; Light-magnesite powder particle diameter < 0.074mm, and wherein MgO>=80wt%, CaO≤2wt%, SiO
2≤ 2wt%; Metallic aluminium purity > 98%; Electric smelting aluminium riched spinel powder footpath < 0.074mm; 0.074mm≤electric fused zirconium corundum≤1mm.
Prepare the method for chromium-free brick described above, comprise the following steps:
A, by electrosmelted magnesite clinker coarse particles, electrosmelted magnesite clinker fine particle and electrosmelted magnesite clinker fine powder mix, be preheated to more than 550 DEG C, obtain magnesia compound;
B, metallic aluminium after melting, is joined in magnesia compound at 700 ~ 720 DEG C, mixing, in whole magnesia particle surface-coated till sheet metal aluminium;
C, add electric fused zirconium corundum, electric smelting aluminium riched spinel powder, Alpha-alumina micro mist and light-magnesite powder successively, mixing 40 ~ 60min, then add liquid phenolic resin, more mixed 35 ~ 45min, obtain chromium-free brick compound;
D, chromium-free brick compound step c obtained make chromium-free brick adobe at 800MPa pressure, after 100 ~ 120 DEG C of drying 20 ~ 36h, at 200 ~ 300 DEG C of thermal treatment 10 ~ 15h, obtain chromium-free brick.
Further, the described above method preparing chromium-free brick, in order to reduce workload, saves time and cost, make mixture mix simultaneously evenly, in a step, mixing preferably adopts batch mixing 10min in the mortar mixer of rotating speed 80 ~ 150rpm.
The described above method preparing chromium-free brick, in Step d, chromium-free brick adobe is preferably through 110 DEG C of dry 24h.
Below in conjunction with embodiment, the specific embodiment of the present invention is further described, does not therefore limit the present invention among described scope of embodiments.
Embodiment 1
Prepare chromium-free brick of the present invention, comprise the following steps:
A, by electrosmelted magnesite clinker coarse particles 15 weight part, electrosmelted magnesite clinker fine particle 25 weight part and electrosmelted magnesite clinker fine powder 20 weight part mix, be preheated to more than 550 DEG C, obtain magnesia compound;
B, metallic aluminium 10 weight part of purity > 98% after melting, is joined in magnesia compound at 700 ~ 720 DEG C, mixing, in whole magnesia particle surface-coated till sheet metal aluminium;
C, add electric fused zirconium corundum 15 weight part, electric smelting aluminium riched spinel powder 15 weight part, Alpha-alumina micro mist 6 weight part and light-magnesite powder 5 weight part successively, mixing 40 ~ 60min, add liquid phenolic resin 5 weight part again, more mixed 40min, obtain chromium-free brick compound;
D, chromium-free brick compound step c obtained make chromium-free brick adobe at 800MPa pressure, after 110 DEG C of dry 24h, at 200 ~ 300 DEG C of thermal treatment 10 ~ 15h, obtain chromium-free brick.
Chromium-free brick is used for RH inner lining of furnace, 15 stoves higher than magnesia chrome brick in work-ing life of lower channel, high life 10 stove of soaking tub inside, high life 50 stove at all the other positions.
Embodiment 2
Prepare chromium-free brick of the present invention, comprise the following steps:
A, by electrosmelted magnesite clinker coarse particles 18 weight part, electrosmelted magnesite clinker fine particle 20 weight part and electrosmelted magnesite clinker fine powder 25 weight part mix, be preheated to more than 550 DEG C, obtain magnesia compound;
B, metallic aluminium 5 weight part of purity > 98% after melting, is joined in magnesia compound at 700 ~ 720 DEG C, mixing, in whole magnesia particle surface-coated till sheet metal aluminium;
C, add electric fused zirconium corundum 10 weight part, electric smelting aluminium riched spinel powder 10 weight part, Alpha-alumina micro mist 3 weight part and light-magnesite powder 2 weight part successively, mixing 40 ~ 60min, add liquid phenolic resin 3 weight part again, more mixed 40min, obtain chromium-free brick compound;
D, chromium-free brick compound step c obtained make chromium-free brick adobe at 800MPa pressure, after 110 DEG C of dry 24h, at 200 ~ 300 DEG C of thermal treatment 10 ~ 15h, obtain chromium-free brick.
Chromium-free brick is used for RH inner lining of furnace, 22 stoves higher than magnesia chrome brick in work-ing life of lower channel, high life 12 stove of soaking tub inside, high life 60 stove at all the other positions.
Embodiment 3
Prepare chromium-free brick of the present invention, comprise the following steps:
A, by electrosmelted magnesite clinker coarse particles 16 weight part, electrosmelted magnesite clinker fine particle 23 weight part and electrosmelted magnesite clinker fine powder 22 weight part mix, be preheated to more than 550 DEG C, obtain magnesia compound;
B, metallic aluminium 8 weight part of purity > 98% after melting, is joined in magnesia compound at 700 ~ 720 DEG C, mixing, in whole magnesia particle surface-coated till sheet metal aluminium;
C, add electric fused zirconium corundum 14 weight part, electric smelting aluminium riched spinel powder 13 weight part, Alpha-alumina micro mist 4 weight part and light-magnesite powder 3 weight part successively, mixing 40 ~ 60min, add liquid phenolic resin 4 weight part again, more mixed 40min, obtain chromium-free brick compound;
D, chromium-free brick compound step c obtained make chromium-free brick adobe at 800MPa pressure, after 110 DEG C of dry 24h, at 200 ~ 300 DEG C of thermal treatment 10 ~ 15h, obtain chromium-free brick.
Chromium-free brick is used for RH inner lining of furnace, 30 stoves higher than magnesia chrome brick in work-ing life of lower channel, high life 15 stove of soaking tub inside, high life 70 stove at all the other positions.
Claims (6)
1. a chromium-free brick, is characterized in that: be prepared from by following parts by weight of component:
Wherein, 5mm≤electrosmelted magnesite clinker coarse particles particle diameter≤8mm, 3mm≤electrosmelted magnesite clinker fine particle particle diameter < 5mm, 1mm≤electrosmelted magnesite clinker fine powder particle diameter < 3mm.
2. a kind of chromium-free brick according to claim 1, is characterized in that: be prepared from by following parts by weight of component:
3. a kind of chromium-free brick according to claim 1 or 2, is characterized in that: MgO > 97wt%, CaO < 1wt%, SiO in electrosmelted magnesite clinker
2< 1wt%; Light-magnesite powder particle diameter < 0.074mm, and wherein MgO>=80wt%, CaO≤2wt%, SiO
2≤ 2wt%; Metallic aluminium purity > 98%; Electric smelting aluminium riched spinel powder footpath < 0.074mm; 0.074mm≤electric fused zirconium corundum particle diameter≤1mm.
4. prepare the method for chromium-free brick described in any one of claims 1 to 3, it is characterized in that: comprise the following steps:
A, by electrosmelted magnesite clinker coarse particles, electrosmelted magnesite clinker fine particle and electrosmelted magnesite clinker fine powder mix, be preheated to more than 550 DEG C, obtain magnesia compound;
B, metallic aluminium after melting, is joined in magnesia compound at 700 ~ 720 DEG C, mixing, in whole magnesia particle surface-coated till sheet metal aluminium;
C, add electric fused zirconium corundum, electric smelting aluminium riched spinel powder, Alpha-alumina micro mist and light-magnesite powder successively, mixing 40 ~ 60min, then add liquid phenolic resin, more mixed 35 ~ 45min, obtain chromium-free brick compound;
D, chromium-free brick compound step c obtained make chromium-free brick adobe at 800MPa pressure, after 100 ~ 120 DEG C of drying 20 ~ 36h, at 200 ~ 300 DEG C of thermal treatment 10 ~ 15h, obtain chromium-free brick.
5. the method preparing chromium-free brick according to claim 4, is characterized in that: in a step, mixing adopts batch mixing 10min in the mortar mixer of rotating speed 80 ~ 150rpm.
6. the method preparing chromium-free brick according to claim 4, is characterized in that: in Step d, chromium-free brick adobe is through 110 DEG C of dry 24h.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106946550A (en) * | 2017-04-12 | 2017-07-14 | 浙江自立高温科技有限公司 | Excellent magnesia-spinel brick of a kind of antistrip performance and preparation method thereof |
| CN107935562A (en) * | 2017-12-02 | 2018-04-20 | 山东鲁桥新材料股份有限公司 | A kind of dry-process cement rotary kiln height temperate zone chromium-free brick and preparation method thereof |
| CN109809808A (en) * | 2017-11-20 | 2019-05-28 | 鞍山市和丰耐火材料有限公司 | A kind of smelting fine work steel invades performance magnesia-spinel brick and preparation method thereof with resistance to slag |
| CN113603459A (en) * | 2020-06-04 | 2021-11-05 | 济南鲁东耐火材料有限公司 | Carbon-free unburned magnesia-alumina brick and preparation method thereof |
-
2015
- 2015-10-13 CN CN201510670471.8A patent/CN105218116B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106946550A (en) * | 2017-04-12 | 2017-07-14 | 浙江自立高温科技有限公司 | Excellent magnesia-spinel brick of a kind of antistrip performance and preparation method thereof |
| CN106946550B (en) * | 2017-04-12 | 2019-08-02 | 浙江自立高温科技有限公司 | A kind of magnesia-spinel brick and preparation method thereof that antistrip performance is excellent |
| CN109809808A (en) * | 2017-11-20 | 2019-05-28 | 鞍山市和丰耐火材料有限公司 | A kind of smelting fine work steel invades performance magnesia-spinel brick and preparation method thereof with resistance to slag |
| CN107935562A (en) * | 2017-12-02 | 2018-04-20 | 山东鲁桥新材料股份有限公司 | A kind of dry-process cement rotary kiln height temperate zone chromium-free brick and preparation method thereof |
| CN113603459A (en) * | 2020-06-04 | 2021-11-05 | 济南鲁东耐火材料有限公司 | Carbon-free unburned magnesia-alumina brick and preparation method thereof |
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| CN105218116B (en) | 2017-03-15 |
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