CN102757245A - Aluminum-silicon carbide brick added with silicon carbide-metallic silicon composite powder - Google Patents
Aluminum-silicon carbide brick added with silicon carbide-metallic silicon composite powder Download PDFInfo
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- CN102757245A CN102757245A CN2012102464872A CN201210246487A CN102757245A CN 102757245 A CN102757245 A CN 102757245A CN 2012102464872 A CN2012102464872 A CN 2012102464872A CN 201210246487 A CN201210246487 A CN 201210246487A CN 102757245 A CN102757245 A CN 102757245A
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Abstract
The invention relates to an aluminum-silicon carbide brick added with silicon carbide-metallic silicon composite powder. The aluminum-silicon carbide brick comprises the following components in percentage by weight: 40-75% of alumina clinker, 10-25% of corundum, 8-10% of graphite, 4-15% of silicon carbide-metallic silicon composite powder, 0-15% of silicon carbide and 0-4% of metallic silicon, wherein the sum of the weight percents of the above components is 100%; and in addition, an additional binder is added, and the weight percent of the additional binder is 3-4wt% of the above components. According to the invention, the silicon carbide-metallic silicon composite powder is used for replacing or partly replacing the raw materials of silicon carbide and metallic silicon to prepare the aluminum-silicon carbide brick, so that the formula cost of the aluminum-silicon carbide brick can be effectively reduced, and the corrosion resistance and thermal shock resistance of the prepared aluminum-silicon carbide brick are superior to those of the traditional aluminum-silicon carbide brick prepared by adopting common silicon carbide and metallic silicon, and the service life is long.
Description
Technical field
The invention belongs to the typing fire resisting material field, be specifically related to a kind of aluminum-silicon carbide brick that adds silit-Pure Silicon Metal composite granule.
Background technology
Aluminum-silicon carbide brick (Al
2O
3-SiC-C brick) raw material composition mainly contains bauxite clinker, corundum, silit, graphite, inhibitor, wedding agent etc.Pure Silicon Metal and silit are requisite integral parts important in the aluminum-silicon carbide brick composition of raw materials.The silit that adds can increase the antistripping property and the anti-scum aggressiveness of aluminum-silicon carbide brick, and the inhibitor metal Si of interpolation can improve the antioxidant property of product.
In recent years, along with China's rapid development of economy, on the one hand, resource product price rising trend is swift and violent.The silit price is by more than 7300 yuan/ton of more than 4000 yuan of/ton rises to 2011 several years ago year, amount of increase nearly 80%.Pure Silicon Metal also increases to more than 10000 yuan/ton price in 2011.On the other hand, because bigger competitive pressure, the product price of aluminum-silicon carbide brick does not only improve in steel mill, constantly requires refractory materials supplier price reduction on the contrary and improves product work-ing life.Therefore, finding low-cost raw material substitution silit and metallic silicon raw material to prepare the silit carbon brick has great importance.
Summary of the invention
Technical problem to be solved by this invention is to the contradiction that the aluminum-silicon carbide brick cost value goes up and the production marketing price reduces, and a kind of aluminum-silicon carbide brick of the interpolation silit-Pure Silicon Metal composite granule that reduces cost is provided.
For solving the problems of the technologies described above, the technical scheme that the present invention adopted is:
A kind of aluminum-silicon carbide brick that adds silit-Pure Silicon Metal composite granule is characterized in that: by weight percentage, it comprises following component: bauxite clinker 40～75%; Corundum 10～25%, graphite 8～10%, silit-Pure Silicon Metal composite granule 4～15%; Silit 0～15%, Pure Silicon Metal 0～4%, the weight percent sum of above-mentioned each component is 100%; Also be added with in addition and add wedding agent, said add wedding agent be the aforementioned component gross weight and 3～4wt%.
Press such scheme; Described silit-Pure Silicon Metal composite granule is to utilize the acidified deironing of waste mortar, the steaming that produce in polysilicon or the single crystal silicon material cutting process to handle and get except that liquid phase, levigate powder process; Granularity＜800 orders; Wherein by weight percentage: SiC 80～90%, Si 10-20%, and surplus is Fe.
Press such scheme; Described silit-Pure Silicon Metal composite granule is handled and to be obtained through the following operation of producing: 1) with the waste mortar that produces in polysilicon or the single crystal silicon material cutting process (cutting mortar slurry throw out; Its staple is SiC, Si, Fe and organism) use s.t., remove the Fe in the waste; 2) compound is heated to 200～300 ℃, steams and remove liquid phase, make solid-liquid separation, obtain the composite granule block of silit and silicon; 3) be finely ground to granularity＜800 orders, obtain silit-Pure Silicon Metal composite granule.
Press such scheme, Al in the said bauxite clinker
2O
3>=88wt%, Fe
2O
3≤2.0wt%.
Press such scheme, said bauxite clinker be by 5～3mm, 3～1mm, 1～0.088mm,＜four gratings of 0.088mm constitute, its weight percent is respectively 50～70%, 15～30%, 5～10%, 0～10%.
Press such scheme, said corundum is brown corundum, Al in the said brown corundum
2O
3>=95wt%, C≤0.10wt%.
Press such scheme, said brown corundum by 1～0.088mm,＜two gratings of 0.088mm constitute, its weight percent is respectively 30～70%, 30～70%.
Press such scheme, said graphite is the L194 crystalline flake graphite, fixed carbon >=94wt%, granularity :-100 orders.
Press such scheme, SiC in the said silit>=90%, granularity≤0.088mm.
Press such scheme, Si in the said Pure Silicon Metal >=98%, granularity-240 order.
Press such scheme, the said wedding agent that adds is a resol, the solid content>=72wt% of said resol, remaining carbon>=42wt%, moisture≤5wt%.
It is main raw material that the present invention adopts bauxite clinker and brown corundum, is because these two kinds of raw materials have good resistance to acid slag, slag basic erosion performance; Select for use graphite to utilize nonwetting property and the snappiness of graphite, to improve the slag penetration resistance and the antistrip performance of product to slag; Selecting for use silit to form as the part of raw material is because it is a kind of non-oxidized substance refractory materials of excellent performance; Have high temperature resistant; Anti-erosion, HS, wear-resisting (hardness is up to 2500kg/mm2); The high characteristics such as (the thermal conductivity ratio aluminum oxide are high) of thermal expansivity little (coefficient of thermal expansion also has only about half of aluminum oxide) and thermal conductivity; And it also is difficult for for slag institute wetting, therefore, adds antistripping property and anti-scum aggressiveness that silit can increase the aluminum silicon carbide brick for preparing thus; The inhibitor metal Si that selects for use is that when add-on acquired a certain degree, the ductility of metal played a major role because metal Si is ductile, and the thermal shock resistance that shows as product improves.
In addition; Select silit for use--the Pure Silicon Metal composite granule substitutes or part substitutes silit and metallic silicon raw material; Because it is waste (the cutting slurry throw out that in cutting (SiC content >=98% in the cutting material) process, is produced by polysilicon or single crystal silicon material (its Si content >=98%); Its staple is SiC, Si, Fe and organism) treated obtaining; The purity of silit and Pure Silicon Metal is than present higher sic raw material (SiC content >=90%) and metallic silicon raw material (Si content >=98%) height of general used purity in the composite granule that then obtains thus; Impurity is few, and granularity (less than 800 orders) also is far smaller than present silit and metallic silicon raw material.Therefore select for use this composite granule as raw material, substitute or alternative carborundum powder of part and metallic silicon power, can improve antioxidant property and the thermal shock resistance and the scour resistance of product better with it.On the other hand, this composite granule is got by the offal treatment that produces in polysilicon or the single crystal silicon material cutting process, so cost is well below the price of present silit and Pure Silicon Metal, and can effectively reduce the formulation cost of aluminum-silicon carbide brick.
The present invention has the following advantages:
(1) selects for use alternative or partly alternative silit of silit-Pure Silicon Metal composite granule and metallic silicon raw material to prepare aluminum-silicon carbide brick, can effectively reduce the formulation cost of aluminum-silicon carbide brick.
(2) part substitutes silit and metallic silicon raw material to select for use the less silit of granularity-Pure Silicon Metal composite granule to substitute perhaps; Because this composite granule granularity is less than 800 orders; Be far smaller than the silit and the metallic silicon raw material of present use; Because granularity is little, the good dispersivity of composite granule in product further improved the antioxidant property of product; The tradition that is superior to aluminum-silicon carbide brick erosion-resisting characteristics for preparing thus and thermal shock resistance adopts the aluminum-silicon carbide brick of common silit and Pure Silicon Metal preparation, long service life.
Embodiment
Embodiment 1
Aluminum-silicon carbide brick is counted by weight percentage, and its composition is: bauxite clinker 47%, and brown corundum 25%, graphite 8%, silit-Pure Silicon Metal composite granule 13%, silit 5%, Pure Silicon Metal 2%, resol adds 3.5%.Al in the bauxite clinker wherein
2O
3Weight percent content is 88%, Fe
2O
3≤2.0wt%, granularity≤5mm, by 5～3mm, 3～1mm, 1～0.088mm,＜four gratings of 0.088mm are respectively 60%, 30%, 10%, 0% by weight percentage and are made into; Al in the palm fibre corundum raw material
2O
3Weight percent content is 95%, C≤0.10wt%, granularity≤1mm, by 1～0.088mm,＜two gratings of 0.088mm are respectively 60%, 40% grating by weight percentage and form; Graphite particle size is-100 orders; Silicon carbide carbon composite granule-800 order; SiC in the silit>=90%, granularity≤0.088mm; Si in the Pure Silicon Metal>=98%, granularity-240 order; Solid content>=the 72wt% of said resol, remaining carbon>=42wt%, moisture≤5wt%.
Above-mentioned silit-Pure Silicon Metal composite granule granularity＜800 orders; Wherein by weight percentage: SiC 83%; Si 15%; Fe 2%, can handle and to obtain through the following operation of producing: 1) waste mortar that produces in polysilicon or the single crystal silicon material cutting process is poured in 18% the hydrochloric acid and stirred 1 hour, remove the Fe in the waste mortar as much as possible; 2) compound is heated to 200～300 ℃, steaming removes liquid phase and comprises water and polyoxyethylene glycol, makes solid-liquid separation, obtains the composite granule block of silit and silicon; 3) be finely ground to granularity＜800 orders, obtain silit-Pure Silicon Metal composite granule.
Its preparation method is: at first take by weighing 47 kilograms of bauxite clinkers, 25 kilograms in brown corundum, 8 kilograms in graphite, silit-13 kilograms of Pure Silicon Metal composite granules, 5 kilograms in silit, 2 kilograms of Pure Silicon Metals, 3.5 kilograms in resol, and subsequent use; Then particulate material (raw material of granularity >=0.088mm) is put into whisking appliance and stir, add the resol stirring and added the graphite restir 3 minutes after 2 minutes, add fine powder (raw material of granularity＜0.088mm) again, stirred discharging 15 minutes; Use the moulding of 6300KN rubbing machine at last, drying, 180 tons of desulfurization hot-metal bottle tank skins of the big section steel works of producing of aluminum silicon carbide carbon brick product certain domestic use, and the life-span reaches 700 times.
Embodiment 2
Aluminum-silicon carbide brick is counted by weight percentage, and its composition is: bauxite clinker 65%, and brown corundum 10%, graphite 10%, silit-Pure Silicon Metal composite granule 15%, resol adds 3%.Al in the bauxite clinker wherein
2O
3Weight percent content is 88%, Fe
2O
3≤2.0wt%, granularity≤5mm, by 5～3mm, 3～1mm, 1～0.088mm,＜four gratings of 0.088mm are respectively 50%, 30%, 10%, 10% grating by weight percentage and form; Al in the palm fibre corundum raw material
2O
3Weight percent content is 95%, C≤0.10wt%, granularity≤1mm, by 1～0.088mm,＜two gratings of 0.088mm are respectively 70%, 30% grating by weight percentage and form; Graphite particle size is-100 orders; Silicon carbide carbon composite granule-800 order; Carborundum granularity≤0.088mm; Pure Silicon Metal granularity-240 order; Solid content>=the 72wt% of said resol, remaining carbon>=42wt%, moisture≤5wt%.
Above-mentioned silit-Pure Silicon Metal composite granule granularity＜800 orders; Wherein by weight percentage: SiC 87%; Si 12%; Fe 1%, can handle and to obtain through the following operation of producing: 1) waste mortar that produces in polysilicon or the single crystal silicon material cutting process is poured in 18% the hydrochloric acid and stirred 1 hour, remove the Fe in the waste mortar as much as possible; 2) compound is heated to 200～300 ℃, steaming removes liquid phase and comprises water and polyoxyethylene glycol, makes solid-liquid separation, obtains the composite granule block of silit and silicon; 3) be finely ground to granularity＜800 orders, obtain silit-Pure Silicon Metal composite granule.
Its preparation method is: at first take by weighing 65 kilograms of bauxite clinkers, 10 kilograms in brown corundum, 10 kilograms in graphite, silit-15 kilograms of Pure Silicon Metal composite granules, 3.5 kilograms in resol, and subsequent use; Then particulate material (raw material of granularity >=0.088mm) is put into whisking appliance and stir, add the resol stirring and added the graphite restir 3 minutes after 2 minutes, add fine powder (raw material of granularity＜0.088mm) again, stirred discharging 15 minutes; Use the moulding of 6300KN rubbing machine at last, drying, 180 tons of desulfurization hot-metal bottle tank skins of the big section steel works of producing of aluminum silicon carbide carbon brick product certain domestic use, and the life-span reaches 700 times.
Embodiment 3
Aluminum-silicon carbide brick is counted by weight percentage, and its composition is: bauxite clinker 58%, and brown corundum 15%, graphite 10%, silit-Pure Silicon Metal composite granule 5%, silit 10%, Pure Silicon Metal 2%, resol adds 4%.Bauxite clinker granularity≤5mm wherein, by 5～3mm, 3～1mm, 1～0.088mm,＜four gratings of 0.088mm are respectively 65%, 20%, 10%, 5% grating by weight percentage and form; Palm fibre corundum raw material granularity≤1mm, granularity be respectively 1～0.088mm,＜two gratings of 0.088mm constitute and are respectively 40%, 60% grating by weight percentage and form; Graphite particle size is-100 orders; Silicon carbide carbon composite granule-800 order; Carborundum granularity≤0.088mm; Pure Silicon Metal granularity-240 order.
Above-mentioned silit-Pure Silicon Metal composite granule granularity＜800 orders; Wherein by weight percentage: SiC 83%; Si 15.5%; Fe 1.5%, can handle and to obtain through the following operation of producing: 1) waste mortar that produces in polysilicon or the single crystal silicon material cutting process is poured in 18% the hydrochloric acid and stirred 1 hour, remove the Fe in the waste mortar as much as possible; 2) compound is heated to 200～300 ℃, steaming removes liquid phase and comprises water and polyoxyethylene glycol, makes solid-liquid separation, obtains the composite granule block of silit and silicon; 3) be finely ground to granularity＜800 orders, obtain silit-Pure Silicon Metal composite granule.
Its preparation method is: at first take by weighing 58 kilograms of bauxite clinkers, 15 kilograms in brown corundum, 10 kilograms in graphite, silit-5 kilograms of Pure Silicon Metal composite granules, 10 kilograms in silit, 2 kilograms of Pure Silicon Metals, 3.5 kilograms in resol, and subsequent use; Then particulate material (raw material of granularity >=0.088mm) is put into whisking appliance and stir, add and add the graphite restir after resol stirs, add fine powder (raw material of granularity＜0.088mm) again, stir discharging; Use the rubbing machine moulding at last, drying, 180 tons of desulfurization hot-metal bottle tank skins of the big section steel works of producing of aluminum silicon carbide carbon brick product certain domestic use, and the life-span reaches 700 times.
Embodiment 4
Aluminum-silicon carbide brick is counted by weight percentage, and its composition is: bauxite clinker 62%, and brown corundum 10%, graphite 9%, silit-Pure Silicon Metal composite granule 7%, silit 8%, Pure Silicon Metal 4%, resol adds 3.5%.Al in the bauxite clinker wherein
2O
3Weight percent content is 88%, granularity≤5mm, by granularity be respectively 5～3mm, 3～1mm, 1～0.088mm,＜four gratings of 0.088mm are respectively 55%, 30%, 7%, 8% grating by weight percentage and form; Al in the palm fibre corundum raw material
2O
3Weight percent content is 95%, granularity≤1mm, by granularity be respectively 1～0.088mm,＜two gratings of 0.088mm are respectively 50%, 50% grating by weight percentage and form; Graphite particle size is-100 orders; Silicon carbide carbon composite granule-800 order; Carborundum granularity≤0.088mm; Pure Silicon Metal granularity-240 order.
Above-mentioned silit-Pure Silicon Metal composite granule granularity＜800 orders; Wherein by weight percentage: SiC 88%; Si 10.4%; Fe 1.6%, can handle and to obtain through the following operation of producing: 1) waste mortar that produces in polysilicon or the single crystal silicon material cutting process used s.t., remove the Fe in the waste as much as possible; 2) compound is heated to 200～300 ℃, steaming removes liquid phase and comprises water and polyoxyethylene glycol, makes solid-liquid separation, obtains the composite granule block of silit and silicon; 3) be finely ground to granularity＜800 orders, obtain silit-Pure Silicon Metal composite granule.
Its preparation method is: at first take by weighing 62 kilograms of bauxite clinkers, 10 kilograms in brown corundum, 9 kilograms in graphite, silit-7 kilograms of Pure Silicon Metal composite granules, 8 kilograms in silit, 4 kilograms of Pure Silicon Metals, 3.5 kilograms in resol, get ready; Then particulate material (raw material of granularity >=0.088mm) is put into whisking appliance and stir, add the resol stirring and add the graphite restir, add fine powder (raw material of granularity＜0.088mm) again, stir discharging; Use the rubbing machine moulding at last, drying, 180 tons of desulfurization hot-metal bottle tank skins of the big section steel works of producing of aluminum silicon carbide carbon brick product certain domestic use, and the life-span reaches 700 times.
It should be noted last that; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although with reference to preferred embodiment the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention; And not breaking away from the spirit and the scope of technical scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. silit--the aluminum-silicon carbide brick of Pure Silicon Metal composite granule is characterized in that in an interpolation: by weight percentage, it comprises following component: bauxite clinker 40～75%; Corundum 10～25%, graphite 8～10%, silit-Pure Silicon Metal composite granule 4～15%; Silit 0～15%, Pure Silicon Metal 0～4%, the weight percent sum of above-mentioned each component is 100%; Also be added with in addition and add wedding agent, said add wedding agent be the aforementioned component gross weight and 3～4wt%.
2. according to the interpolation silit described in the claim 1--the aluminum-silicon carbide brick of Pure Silicon Metal composite granule; It is characterized in that: described silit-Pure Silicon Metal composite granule is to utilize the acidified deironing of waste mortar, the steaming that produce in polysilicon or the single crystal silicon material cutting process to handle and get except that liquid phase, levigate powder process; Granularity＜800 orders; Wherein by weight percentage: SiC 80～90%, Si 10-20%, and surplus is Fe.
3. according to the interpolation silit described in the claim 1--the aluminum-silicon carbide brick of Pure Silicon Metal composite granule; It is characterized in that: described silit-Pure Silicon Metal composite granule is handled and to be obtained through the following operation of producing: 1) waste mortar that produces in polysilicon or the single crystal silicon material cutting process is used s.t., remove the Fe in the waste; 2) compound is heated to 200～300 ℃, steams and remove liquid phase, make solid-liquid separation, obtain the composite granule block of silit and silicon; 3) be finely ground to granularity＜800 orders, obtain silit-Pure Silicon Metal composite granule.
4. according to the interpolation silit described in the claim 1--the aluminum-silicon carbide brick of Pure Silicon Metal composite granule is characterized in that: Al in the said bauxite clinker
2O
3>=88wt%, Fe
2O
3≤2.0wt%.
5. according to the interpolation silit described in the claim 1--the aluminum-silicon carbide brick of Pure Silicon Metal composite granule; It is characterized in that: said bauxite clinker be by 5～3mm, 3～1mm, 1～0.088mm,＜four gratings of 0.088mm constitute, its weight percent is respectively 50～70%, 15～30%, 5～10%, 0～10%.
6. according to the interpolation silit described in the claim 1--the aluminum-silicon carbide brick of Pure Silicon Metal composite granule is characterized in that: said corundum is brown corundum, Al in the said brown corundum
2O
3>=95wt%, C≤0.10wt%.
7. according to the interpolation silit described in the claim 6--the aluminum-silicon carbide brick of Pure Silicon Metal composite granule is characterized in that: said brown corundum by 1～0.088mm,＜two gratings of 0.088mm constitute, its weight percent is respectively 30～70%, 30～70%.
8. according to the interpolation silit described in the claim 1--the aluminum-silicon carbide brick of Pure Silicon Metal composite granule is characterized in that: said graphite is L194 crystalline flake graphite: fixed carbon >=94wt%, granularity :-100 orders.
9. according to the interpolation silit described in the claim 1--the aluminum-silicon carbide brick of Pure Silicon Metal composite granule is characterized in that: SiC in the said silit>=90%, granularity≤0.088mm; Si in the said Pure Silicon Metal>=98%, granularity-240 order.
10. according to the interpolation silit described in the claim 1--the aluminum-silicon carbide brick of Pure Silicon Metal composite granule is characterized in that: the said wedding agent that adds is a resol, the solid content>=72wt% of said resol, remaining carbon>=42wt%, moisture≤5wt%.
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| CN105272310A (en) * | 2015-11-11 | 2016-01-27 | 武汉钢铁(集团)公司 | Aluminum-carbon carborundum brick for torpedo ladle and preparation method thereof |
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| CN106588058A (en) * | 2016-12-26 | 2017-04-26 | 中钢集团耐火材料有限公司 | High-strength composite material for hot metal melting and large container working layers and preparation method thereof |
| CN108083785A (en) * | 2017-12-21 | 2018-05-29 | 浙江自立高温科技有限公司 | A kind of half lightweight aluminum-silicon carbide brick and preparation method thereof |
| CN109320254A (en) * | 2017-08-01 | 2019-02-12 | 张家港市五湖新材料技术开发有限公司 | A kind of SiC reinforcement aluminium nitride ceramics and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109320254A (en) * | 2017-08-01 | 2019-02-12 | 张家港市五湖新材料技术开发有限公司 | A kind of SiC reinforcement aluminium nitride ceramics and preparation method thereof |
| CN108083785A (en) * | 2017-12-21 | 2018-05-29 | 浙江自立高温科技有限公司 | A kind of half lightweight aluminum-silicon carbide brick and preparation method thereof |
| CN108083785B (en) * | 2017-12-21 | 2020-12-08 | 浙江自立高温科技股份有限公司 | Semi-light aluminum silicon carbide carbon brick and preparation method thereof |
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|---|---|
| CN102757245B (en) | 2015-03-04 |
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