CN108752022B - Method for manufacturing heat insulation material for producing fused zirconia alumina bricks - Google Patents
Method for manufacturing heat insulation material for producing fused zirconia alumina bricks Download PDFInfo
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- CN108752022B CN108752022B CN201810611859.4A CN201810611859A CN108752022B CN 108752022 B CN108752022 B CN 108752022B CN 201810611859 A CN201810611859 A CN 201810611859A CN 108752022 B CN108752022 B CN 108752022B
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- 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
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Abstract
The invention relates to a method for manufacturing a heat insulation material for producing a fused zirconia-corundum brick, which adopts the technical scheme that the heat insulation material is prepared from the following raw materials: 100kg of silicon powder, 17kg of paper pulp, 13kg of sawdust, 10kg of water glass with the modulus of 32-33 and 5-10kg of water; firstly adding paper pulp, sawdust and water glass into a container, uniformly stirring, adding silicon powder, stirring for 5-8 minutes, finally adding water, uniformly stirring to obtain slurry, making the slurry into round balls with the diameter of 5mm through a ball making machine, and putting the made round balls into a drying kiln for drying for 3-5 hours to obtain light heat-insulating balls, wherein the light heat-insulating balls can be directly used as heat-insulating materials of a heat-insulating box in the production process of the zirconia corundum electrically-fused brick.
Description
Technical Field
The invention relates to a heat insulation material, in particular to a method for manufacturing a heat insulation material for producing a fused zirconia-corundum brick.
Background
After casting, the fused cast zirconia-corundum fused brick is subjected to heat preservation annealing for 7 to 15 days according to the weight of the brick, and the heat preservation material in the heat preservation box uses silica sand with the granularity of about 5mm as the heat preservation material. The powder content is not allowed to exceed 2%, which may affect the air permeability and result in a decrease in the molding ratio of the article. One insulation can requires about 1 ton of silica sand insulation material on average. 200 heat preservation boxes are needed for recycling one electric furnace. Due to frequent mechanical friction and continuous conversion between high temperature and normal temperature in the using process of the heat preservation sand, a large amount of silicon powder is generated quickly, namely the heat preservation sand is lost, and about 100 kilograms of silicon powder is generated per month for one ton of heat preservation sand.
The fused cast zirconia-corundum fused brick can finally generate a large amount of waste silicon powder in the production process, and the waste silicon powder is obtained from the following links: the used sand produced after the sand mold is cast needs to be recycled for recycling of manufacturing materials of the sand mold, the granularity of the used sand of the manufacturing materials of the sand mold needs to be sorted, no dust exists, and the air permeability of the sand mold can be influenced by the powder content in the silica sand of the sand mold raw material. The recycling rate of used sand in each regeneration is about 70%, so that 30% of silicon powder is screened out and cannot be used for sand mold manufacturing. About 7 tons of sand are needed for manufacturing the sand mold in one electric furnace production line every day, and about 2.5 tons of silicon powder left after the waste sand is recycled is useless. The waste silica sand can be only discarded and poured, the soil structure is changed due to the self property of the waste silica sand, plants cannot grow, the waste silica sand has a destructive effect on the environment and is a behavior which is not allowed by environmental protection policies. Therefore, the treatment of waste silicon powder is an irremediably improved subject.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention aims to provide the method for manufacturing the heat-insulating material for producing the fused zirconia alumina brick, which can effectively solve the problem of producing the heat-insulating material of the heat-insulating box by using waste silicon powder.
The technical scheme of the invention is that the method for manufacturing the heat insulation material for producing the fused zirconia-corundum bricks comprises the following steps: 100kg of silicon powder, 17kg of paper pulp, 13kg of sawdust, 10kg of water glass with the modulus of 32-33 and 5-10kg of water; firstly, adding paper pulp, sawdust and water glass into a container, uniformly stirring, adding silicon powder, stirring for 5-8 minutes, finally adding water, uniformly stirring to obtain slurry, making the slurry into balls with the diameter of 5mm through a ball making machine, and putting the balls into a drying kiln for drying for 3-5 hours to obtain light heat-insulating balls, wherein the light heat-insulating balls can be directly used as heat-insulating materials of a heat-insulating box in the production process of the fused zirconia-corundum bricks;
the silicon powder is silicon powder generated in the using process of the heat preservation sand and waste silicon powder generated in the production process of the fused cast zirconia corundum fused brick; the drying temperature of the drying kiln is above 250 ℃.
The invention has reasonable formula, paper pulp components and sawdust components in the mud balls can be burnt off in the drying process to form a hollow light state, the mud balls form too small space and have poor heat preservation effect when pure paper pulp is used, the gaps in the dried mud balls are too large when pure sawdust is used, the breakage rate of the mud balls is too high when the mud balls are used, the mud balls can have good heat preservation effect and durable effect by properly proportioning the paper pulp and the sawdust, the paper pulp and the silicon powder have bonding effect, and the adding effect of the water glass is used for enhancing the bonding effect. Convenient use, good effect and good social and economic benefits.
Detailed Description
The following examples further illustrate the embodiments of the present invention in detail.
Example 1
The method for manufacturing the thermal insulation material for producing the zirconia-corundum fused bricks comprises the following steps of: 100kg of silicon powder, 17kg of paper pulp, 13kg of sawdust, 10kg of water glass with the modulus of 32 and 5kg of water; firstly, adding paper pulp, sawdust and water glass into a container, uniformly stirring, adding silicon powder, stirring for 5 minutes, finally adding water, uniformly stirring to obtain slurry, making the slurry into balls with the diameter of 5mm through a ball making machine, and putting the made balls into a drying kiln to be dried for 3 hours to obtain light heat-insulating balls which can be directly used as heat-insulating materials of a heat-insulating box in the production process of the fused zirconia-corundum bricks; the silicon powder is silicon powder generated in the using process of the heat preservation sand and waste silicon powder generated in the production process of the fused cast zirconia corundum fused brick; the drying temperature of the drying kiln is 250 ℃.
Example 2
The method for manufacturing the thermal insulation material for producing the zirconia-corundum fused bricks comprises the following steps of: 100kg of silicon powder, 17kg of paper pulp, 13kg of sawdust, 10kg of water glass with the modulus of 33 and 8kg of water; firstly, adding paper pulp, sawdust and water glass into a container, uniformly stirring, adding silicon powder, stirring for 6.5 minutes, finally adding water, uniformly stirring to obtain slurry, making the slurry into balls with the diameter of 5mm through a ball making machine, and putting the balls into a drying kiln to be dried for 4 hours to obtain light heat-insulating balls which can be directly used as heat-insulating materials of a heat-insulating box in the production process of the fused zirconia-corundum bricks; the silicon powder is waste silicon powder generated in the production process of the fused cast zirconia-corundum fused brick; the drying temperature of the drying kiln is 280 ℃.
Example 3
The method for manufacturing the thermal insulation material for producing the zirconia-corundum fused bricks comprises the following steps of: 100kg of silicon powder, 17kg of paper pulp, 13kg of sawdust, 10kg of water glass with the modulus of 33 and 10kg of water; firstly, adding paper pulp, sawdust and water glass into a container, uniformly stirring, adding silicon powder, stirring for 8 minutes, finally adding water, uniformly stirring to obtain slurry, making the slurry into balls with the diameter of 5mm through a ball making machine, and putting the made balls into a drying kiln to be dried for 5 hours to obtain light heat-insulating balls which can be directly used as heat-insulating materials of a heat-insulating box in the production process of the fused zirconia-corundum bricks; the silicon powder is silicon powder generated in the using process of the heat preservation sand and waste silicon powder generated in the production process of the fused cast zirconia corundum fused brick; the drying temperature of the drying kiln is above 300 ℃.
Silica flour is a cheap heat-insulating material, but the action coverage area is greatly reduced when residual adhesive exists, and another using effect can be achieved only by processing waste silica flour to change the shape and the specification of the waste silica flour. The waste silicon powder is made into a spherical heat-insulating material which can replace the granular silicon sand in the heat-insulating box. The effect of the round thermal insulation material is greater than that of the homogeneous thermal insulation material with an irregular shape. The heat preservation effect of the hollow ball is far greater than that of a solid ball. The applicant has made a large number of experiments, the light heat-preservation ball is made of waste silicon powder, the waste silicon powder is used for replacing the heat-preservation material of the existing heat-preservation box, good technical effects are obtained, the electric-melting brick produced by annealing the heat-preservation material of the heat-preservation box achieves the required quality index, compared with the prior art, the formula of the invention is reasonable, the paper pulp component and the saw dust component in the mud ball can be burnt in the drying process to form a hollow light state, the space formed by the mud ball finally is too small when the paper pulp is pure paper pulp, the heat-preservation effect is not good enough, the gap in the mud ball is too large after drying when the saw dust is pure, the damage rate of the mud ball is too high when the mud ball is used, the mud ball can have good heat-preservation effect and durable effect by the proper proportion of the paper pulp and the saw dust, the paper pulp and the silicon powder have the self-bonding effect, the adding effect of the water glass is the reinforced bonding effect, the light heat-preservation ball made of the waste silicon powder can replace the granular silicon sand heat-preservation material, the method has the advantages that purchase of heat insulation materials of the heat insulation box is omitted, the purpose of changing waste into valuable is achieved, meanwhile, the heat insulation effect of the silicon light heat insulation balls is far better than that of the granular silica sand, the forming rate of the fused brick is indirectly improved, environmental damage is avoided due to recycling of waste silica powder, the method is convenient to use, good in effect and good in social and economic benefits.
Claims (4)
1. A method for manufacturing a heat insulation material for producing a fused zirconia-corundum brick is characterized in that the heat insulation material is prepared from the following raw materials: 100kg of silicon powder, 17kg of paper pulp, 13kg of sawdust, 10kg of water glass with the modulus of 32-33 and 5-10kg of water; firstly, adding paper pulp, sawdust and water glass into a container, uniformly stirring, adding silicon powder, stirring for 5-8 minutes, finally adding water, uniformly stirring to obtain slurry, making the slurry into balls with the diameter of 5mm through a ball making machine, and putting the balls into a drying kiln for drying for 3-5 hours at 280 ℃ to obtain light heat-insulating balls, wherein the light heat-insulating balls can be directly used as heat-insulating materials of a heat-insulating box in the production process of the fused zirconia-corundum bricks.
2. The method for manufacturing the heat insulating material for the production of the fused zirconia-corundum bricks according to claim 1, wherein the silicon powder is silicon powder generated in the using process of heat insulating sand and waste silicon powder generated in the production process of the fused cast fused zirconia-corundum bricks.
3. The method for manufacturing the heat insulating material for the production of the fused zirconia alumina brick according to claim 1, wherein the drying temperature of the drying kiln is more than 250 ℃.
4. The method for manufacturing the heat insulating material for the production of the fused zirconia alumina brick according to claim 1, wherein the heat insulating material is prepared from the following raw materials: 100kg of silicon powder, 17kg of paper pulp, 13kg of sawdust, 10kg of water glass with the modulus of 33 and 8kg of water; firstly, adding paper pulp, sawdust and water glass into a container, uniformly stirring, adding silicon powder, stirring for 6.5 minutes, finally adding water, uniformly stirring to obtain slurry, making the slurry into balls with the diameter of 5mm through a ball making machine, and putting the balls into a drying kiln to be dried for 4 hours to obtain light heat-insulating balls which can be directly used as heat-insulating materials of a heat-insulating box in the production process of the fused zirconia-corundum bricks; the silicon powder is waste silicon powder generated in the production process of the fused cast zirconia-corundum fused brick; the drying temperature of the drying kiln is 280 ℃.
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| CN201810611859.4A CN108752022B (en) | 2018-06-14 | 2018-06-14 | Method for manufacturing heat insulation material for producing fused zirconia alumina bricks |
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| CN201810611859.4A CN108752022B (en) | 2018-06-14 | 2018-06-14 | Method for manufacturing heat insulation material for producing fused zirconia alumina bricks |
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| CN108752022B true CN108752022B (en) | 2021-09-17 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362635A (en) * | 2007-08-07 | 2009-02-11 | 徐进清 | Silica heat insulating products and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100494106C (en) * | 2006-12-13 | 2009-06-03 | 徐进清 | Ultralight low-conductive heat-insulation material and producing method thereof |
| CN101362650A (en) * | 2007-08-07 | 2009-02-11 | 徐进清 | Semi-silicium heat preserving heat insulation refractory product and preparation method thereof |
| CN102206084B (en) * | 2011-03-18 | 2014-06-04 | 郑州东方新型耐火材料有限公司 | Silicon heat-insulating product with high refractoriness under load and low volume weight, and preparation method thereof |
| CN104150950A (en) * | 2014-08-04 | 2014-11-19 | 宜兴市高科耐火材料科技有限公司 | Preparation method for porous light heat preservation material |
| CN106316448B (en) * | 2016-07-28 | 2019-02-05 | 河南工业大学 | A kind of light porous refractory material of rice husk base and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362635A (en) * | 2007-08-07 | 2009-02-11 | 徐进清 | Silica heat insulating products and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 煤矸石对粉煤灰页岩砖主要性能的影响;田北平;《四川理工学院学报》;20141231;第27卷(第6期);第59-62页 * |
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