CN101712551B - Method for producing silicon mullite abrasive brick - Google Patents
Method for producing silicon mullite abrasive brick Download PDFInfo
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- CN101712551B CN101712551B CN2009100662735A CN200910066273A CN101712551B CN 101712551 B CN101712551 B CN 101712551B CN 2009100662735 A CN2009100662735 A CN 2009100662735A CN 200910066273 A CN200910066273 A CN 200910066273A CN 101712551 B CN101712551 B CN 101712551B
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Abstract
The invention discloses a method for producing a silicon mullite abrasive brick, comprising the following steps of: firstly, selecting 4 parts of bauxite granules, 2 parts of brown aluminum oxide granules, 0.4 part of carborundum granules, 2.5 parts of bauxite powder, 0.8 part of carborundum powder, 0.2 part of metallic silicon powder, 0.2 part of silicon powder and 0.5 part of clay powder in parts by weight; secondly, adding the bauxite granules, the brown aluminum oxide granules and the carborundum granules into an edge runner wet mill and premixing, then adding lignin liquor accounting for 4-5 percent of the total weight of materials and premixing, adding the bauxite powder, the carborundum powder, and the metallic silicon powder and mixing, adding the clay powder and the silicon powder, mixing and discharging ground ageing mixture; and thirdly, pressing the pug into semi-finished products, feeding the semi-finished products into a drying chamber, drying, feeding semi-finished products into a high-temperature tunnel kiln and sintering to form a finished brick body. The brick body has long service life, can keep synchronous running with a kiln liner in a firing zone, reduces the maintenance times for users to close down the kiln, and simultaneously has the advantages of high softening temperature for load, favorable thermal shock resisting stability, favorable wear-resisting performance and the like.
Description
Technical field
The present invention relates to the working method of cement kiln, especially relate to the working method of the silicon mullite abrasive brick that uses at position, a kind of cement kiln preheating zone with refractory brick.
Background technology
Large-scale new type nonaqueous cement kiln transitional zone is endured mechanical stress and frictional force to the fullest extent owing to temperature feature causes this position to be difficult for sticking kliner coating; More outstanding a bit is according to the requirement of cement sintering process; The top temperature point of clinkering zone will constantly move forward and backward, because the temperature field constantly changes, general material holds can't stand because the rapid heat cycle that change of temperature field causes; Caused the transitional zone lining brick very easily to damage; And can not keep synchronously with the life cycle of clinkering zone material, simultaneously since along with the increase of increase gradually in new dry process Dayao kiln footpath (from 2 meters to present 6 meters) and kiln body rotating speed (rotating speed of the long kiln of conventional wet generally the 60-70 commentaries on classics/hour; Large-scale new type dry kiln rotating speed changes at 180-210/hour; Even up to 240 change/hour), the deadweight of unit length lining brick will increase relatively, the suffered thermal stresses of kiln lining, mechanical stress are more than wanting high on traditional kiln.Though cheap anti-peeling high aluminium brick is good in operative technique, the little cement production enterprise in kiln footpath is able to widespread use; But high alumina brick is because the restriction of material self character factor; Result of use at large-scale (diameter is more than 4 meters) cement rotary kiln transition belt is unsatisfactory, and work-ing life is no longer than 8 months, even has only 2-3 month; Can not make the work-ing life and the clinkering zone kiln lining of transitional zone lining brick keep synchronous operation, 1 year needs of transitional zone kiln lining often stop the kiln maintenance.
Summary of the invention
The object of the present invention is to provide a kind of working method of silicon mullite abrasive brick of longer service life.
For realizing above-mentioned purpose, the present invention can take following technical proposals:
The working method of silicon mullite abrasive brick of the present invention comprises the steps:
The first step: choose 3 parts of the bauxitic clay particulate material of granularity 5-3mm by weight, 1 part of the bauxitic clay particulate material of 0.075mm＜granularity＜3mm, 2 parts in the brown corundum in granules material of granularity 3-1mm; 0.4 part in the silicon-carbide particle material of granularity 3-1mm; 2.5 parts of the bauxitic clay powders of granularity≤0.075mm, 0.8 part of the sic powder of granularity≤0.075mm, 0.2 part of the Pure Silicon Metal powder of granularity≤0.075mm; 0.2 part of the silicon powder of granularity＜0.019mm, 0.5 part of the clay powder of granularity≤0.075mm;
Second step: bauxitic clay, brown corundum, silicon-carbide particle material were added the edge runner-wet mill premix 3-5 minute; The lignin liquor that adds the material gross weight 4-5% that chooses in the first step then ground 3-5 minute in advance; Add bauxitic clay powder, sic powder, Pure Silicon Metal powder again after mixing 10 minutes, add again after the mixing 3-5 of clay powder and silicon powder minute and go out to grind ageing mixture more than 2 hours;
The 3rd step: second step was stranded good pug puts into forming pressure and be pressed into work in-process greater than the pressing machine of 630KN; Send into the kiln inner drying; Drying temperature 95-105 ℃, 48-72 hour time of drying, go in the hyperthermia tunnel Kiln under weakly reducing atmosphere sintering under 1450 ℃ ± 10 ℃ conditions; And insulation can obtain the finished bricks body in 6-8 hour under 1450 ℃ ± 10 ℃ conditions, and the physical and chemical index of this brick body is Al
2O
3(%)>=63; SiC+SiO
2(%)>=35; Volume density (g/cm
3)>=2.80; Apparent porosity (%)≤19; Cold crushing strength (MPa)>=100; Thermal shock resistance, inferior>=20; Refractoriness under load ℃>=1680; Wear resistance≤21.
Said bauxitic clay is answered conformance with standard Al
2O
3>=84%, Fe
2O
3＜1.5%.
Said brown corundum is answered conformance with standard Al
2O
3>=97%, Fe
2O
3＜0.30%.
Said silit is answered conformance with standard Al
2O
3>=97%, Fe
2O
3≤1%.
Said silicon powder is answered conformance with standard SiO
2>=97%.
Said clay powder is answered conformance with standard Al
2O
3>=42-50%, Fe
2O
3≤2%.
Said Pure Silicon Metal is answered conformance with standard Si >=97%.。
The invention has the advantages that the silicon mullite abrasive brick that uses the present invention to produce at position, large-scale new type nonaqueous cement kiln preheating zone; Can reach work-ing life more than 2 years; Can reach more than 1 year in the work-ing life of new type nonaqueous cement kiln transitional zone; Can keep synchronous operation with the clinkering zone kiln lining, reduce the user and stopped the kiln frequency of maintenance.This product has advantages such as refractoriness under load height, anti-thermal shock good stability, wear resisting property be good.The new Cement Group company of China 5 meters Dayaos of Yangxin second phase diameter have been created 456 days the longest life cycle record of national similar kiln with this product, well beyond similar dry-process cement rotary kiln with 6 months average life cycle of like product.The physical and chemical index of this product and siliceous mullite brick and anti-peeling high aluminium brick comparative result see the following form:
| The title target | The silicon mullite abrasive brick technical indicator | Siliceous mullite brick GM1650 technical indicator (JC/T1064-2007) | Anti-peeling high aluminium brick technical indicator (GB/T2988-2004) |
| Al 2O 3(％) | ≥63 | ≥65 | ≥75 |
| ZrO 2(％) | ------ | ------ | ≥6 |
| SiC+Si?O 2(％) | ≥35 | ------ | ------ |
| Volume density (g/cm 3) | ≥2.80 | 2.65 | ------ |
| Apparent porosity (%) | ≤17 | 17 | ≤20 |
| Cold crushing strength (MPa) | ≥100 | ≥80 | ------ |
| Thermal shock resistance, inferior (1100 ℃, water-cooled) | ≥20 | ≥10 | ≥20 |
| Refractoriness under load ℃ (0.2MPa, T0.6) | ≥1680 | ------ | ------ |
| Wear resistance | ≤4 | ≤5 | ------ |
Embodiment
The working method of silicon mullite abrasive brick of the present invention, it comprises the steps:
The first step: with jaw crusher or cone crusher that material is broken, with ball mill particulate material is pulverized, choose 3 parts of the bauxitic clay particulate material of granularity 5-3mm by weight; 0.075mm 1 part of the bauxitic clay particulate material of＜granularity＜3mm; 2 parts in the brown corundum in granules material of granularity 3-1mm, 0.4 part in the silicon-carbide particle material of granularity 3-1mm, 2.5 parts of the bauxitic clay powders of granularity≤0.075mm; 0.8 part of the sic powder of granularity≤0.075mm; 0.2 part of the Pure Silicon Metal powder of granularity≤0.075mm, 0.2 part of the silicon powder of granularity＜0.019mm, 0.5 part of the clay powder of granularity≤0.075mm;
Second step: bauxitic clay, brown corundum, silicon-carbide particle material were added the edge runner-wet mill premix 3-5 minute; The lignin liquor that adds the material gross weight 4-5% that chooses in the first step then ground 3-5 minute in advance; Add bauxitic clay powder, sic powder, Pure Silicon Metal powder again after mixing 10 minutes, add again after the mixing 3-5 of clay powder and silicon powder minute and go out to grind ageing mixture more than 2 hours;
The 3rd step: second step was stranded good pug puts into forming pressure and be pressed into work in-process greater than the pressing machine of 630KN; Send into the kiln inner drying; Drying temperature 95-105 ℃, 48-72 hour time of drying, go in the hyperthermia tunnel Kiln under weakly reducing atmosphere sintering under 1450 ℃ ± 10 ℃ conditions; And insulation can obtain the finished bricks body in 6-8 hour under 1450 ℃ ± 10 ℃ conditions, and the physical and chemical index of this finished bricks body is Al
2O
3(%)>=63; SiC+SiO
2(%)>=35; Volume density (g/cm
3)>=2.80; Apparent porosity (%)≤19; Cold crushing strength (MPa)>=100; Thermal shock resistance, inferior>=20; Refractoriness under load ℃>=1680; Wear resistance≤21.
The bauxitic clay that adopts is answered conformance with standard Al
2O
3>=84%, Fe
2O
3＜1.5%.
The brown corundum that adopts is answered conformance with standard Al
2O
3>=97%, Fe
2O
3＜0.30%.
The silit that adopts is answered conformance with standard Al
2O
3>=97%, Fe
2O
3≤1%.
The silicon powder that adopts is answered conformance with standard SiO
2>=97%.
The clay powder that adopts is answered conformance with standard Al
2O
3>=42-50%, Fe
2O
3≤2%.
The Pure Silicon Metal that adopts is answered conformance with standard Si >=97%.
Claims (5)
1. the working method of a silicon mullite abrasive brick, it is characterized in that: it comprises the steps:
The first step: choose 3 parts of the bauxitic clay particulate material of granularity 5-3mm by weight, 1 part of the bauxitic clay particulate material of 0.075mm＜granularity＜3mm, 2 parts in the brown corundum in granules material of granularity 3-1mm; 0.4 part in the silicon-carbide particle material of granularity 3-1mm; 2.5 parts of the bauxitic clay powders of granularity≤0.075mm, 0.8 part of the sic powder of granularity≤0.075mm, 0.2 part of the Pure Silicon Metal powder of granularity≤0.075mm; 0.2 part of the silicon powder of granularity＜0.019mm, 0.5 part of the clay powder of granularity≤0.075mm;
Second step: bauxitic clay, brown corundum, silicon-carbide particle material were added the edge runner-wet mill premix 3-5 minute; The lignin liquor that adds the total weight of material 4-5% that chooses in the first step then ground 3-5 minute in advance; Add bauxitic clay powder, sic powder, Pure Silicon Metal powder again after mixing 10 minutes, add again after the mixing 3-5 of clay powder and silicon powder minute and go out to grind ageing mixture more than 2 hours;
The 3rd step: second step was stranded good pug puts into forming pressure and be pressed into work in-process greater than the pressing machine of 630KN; Send into the kiln inner drying; Drying temperature 95-105 ℃, 48-72 hour time of drying, go in the hyperthermia tunnel Kiln under weakly reducing atmosphere sintering under 1450 ℃ ± 10 ℃ conditions; And insulation can obtain the finished bricks body in 6-8 hour under 1450 ℃ ± 10 ℃ conditions, and the physical and chemical index of this brick body is Al
2O
3>=63%; SiC+SiO
2>=35%; Volume density>=2.80g/cm
3Apparent porosity≤19%; Cold crushing strength>=100MPa; Thermal shock resistance>=20 time; Refractoriness under load ℃>=1680; Wear resistance≤21.
2. the working method of silicon mullite abrasive brick according to claim 1, it is characterized in that: said bauxitic clay is answered conformance with standard Al
2O
3>=84%, Fe
2O
3＜1.5%.
3. the working method of silicon mullite abrasive brick according to claim 1, it is characterized in that: said brown corundum is answered conformance with standard Al
2O
3>=97%, Fe
2O
3＜0.30%.
4. the working method of silicon mullite abrasive brick according to claim 1, it is characterized in that: said silicon powder is answered conformance with standard SiO
2>=97%.
5. the working method of silicon mullite abrasive brick according to claim 1, it is characterized in that: said Pure Silicon Metal is answered conformance with standard Si >=97%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100662735A CN101712551B (en) | 2009-10-28 | 2009-10-28 | Method for producing silicon mullite abrasive brick |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100662735A CN101712551B (en) | 2009-10-28 | 2009-10-28 | Method for producing silicon mullite abrasive brick |
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| Publication Number | Publication Date |
|---|---|
| CN101712551A CN101712551A (en) | 2010-05-26 |
| CN101712551B true CN101712551B (en) | 2012-07-25 |
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ID=42416613
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| CN102399086B (en) * | 2010-09-09 | 2013-04-24 | 郑州汇特耐火材料有限公司 | Guimo brick and its manufacturing technology |
| CN101948324A (en) * | 2010-09-21 | 2011-01-19 | 河南火宝耐火材料有限公司 | Special silicon brick |
| CN102219530B (en) * | 2011-03-14 | 2013-08-14 | 无锡兴达节能科技股份有限公司 | Silicon mullite brick and preparation method thereof |
| CN102584287B (en) * | 2012-02-03 | 2013-05-08 | 郑州中本窑炉材料有限公司 | Silicon mullite iron brick |
| CN102924101B (en) * | 2012-11-22 | 2013-10-09 | 盱眙县东强新型建材厂 | Attapulgite and shale sintered refractory heat-preserving block |
| CN103833386B (en) * | 2012-12-04 | 2016-01-20 | 江苏顺星耐火科技有限公司 | High abrasion siliceous mullite brick and preparation method thereof |
| CN104649690A (en) * | 2014-01-02 | 2015-05-27 | 岑溪市新建球陶瓷有限公司 | Preparation method of silicon and mullite brick |
| CN104072178B (en) * | 2014-07-17 | 2015-10-21 | 郑州四方汇达高新耐火材料有限公司 | A kind of preparation method of energy-saving HD-8 abrasive brick |
| CN104058767B (en) * | 2014-07-17 | 2015-05-13 | 郑州四方汇达高新耐火材料有限公司 | Preparation method of HD-9 special high-wear-resistant brick |
| CN104291847B (en) * | 2014-10-14 | 2016-08-31 | 淮南师范学院 | A kind of high intensity siliceous mullite brick and preparation method thereof |
| CN104446538B (en) * | 2014-11-17 | 2016-08-17 | 威远县德胜耐材有限公司 | A kind of high alumina is combined ladle brick and preparation method thereof |
| CN105418098A (en) * | 2015-12-16 | 2016-03-23 | 董建军 | Heat-conductive and energy-saving refractory brick used for fire path wall in carbon roasting furnace and preparation method thereof |
| CN105884337A (en) * | 2016-04-07 | 2016-08-24 | 吕梁耀金道冶金材料工程技术有限公司 | Novel anti-stripping high-alumina brick production process |
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| CN106518114B (en) * | 2016-11-15 | 2019-03-19 | 淄博工陶耐火材料有限公司 | The manufacture craft of ultralow-porosity, low thermal expansion fireclay refractory |
| CN106938922B (en) * | 2017-04-06 | 2020-07-24 | 郑州中建耐火材料有限公司 | Silicon corundum abrasive brick |
| CN112239353A (en) * | 2020-10-21 | 2021-01-19 | 江西博丰耐火材料有限公司 | Lining brick for one-pot hot metal ladle and preparation process thereof |
| CN116161974B (en) * | 2023-02-22 | 2024-02-27 | 宜兴市金其节能科技有限公司 | Modified compact refractory brick for plasma melting furnace and preparation method |
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| CN101712551A (en) | 2010-05-26 |
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