CN104987095A - Preparation method of magnesian castable with function of hydration resistance - Google Patents
Preparation method of magnesian castable with function of hydration resistance Download PDFInfo
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- CN104987095A CN104987095A CN201510408485.2A CN201510408485A CN104987095A CN 104987095 A CN104987095 A CN 104987095A CN 201510408485 A CN201510408485 A CN 201510408485A CN 104987095 A CN104987095 A CN 104987095A
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Abstract
The invention discloses a preparation method of a magnesian castable with a function of hydration resistance. Mixed materials include the following components in parts: 25 to 35 parts of magnesite, 15 to 25 parts of spinel, 15 to 25 parts of corundum, 5 to 10 parts of calcium aluminate cement, 2 to 8 parts of silicon dioxide micro powder, 1 to 5 parts of graphite, 3 to 10 parts of sodium hexametaphosphate, 4 to 9 parts of boric acid, 2 to 6 parts of oxalic acid, 3 to 9 parts of calcium oxide, 5 to 10 parts of boric oxide, 2 to 8 parts of nickel oxide, 15 to 25 parts of organic fiber, 0.1 to 3 parts of metal aluminum powder. The magnesian castable provided by the invention has good hydration resistance.
Description
[technical field]
The present invention relates to the technical field of mould material.
[background technology]
Mould material, also known as refractory castable, is a kind ofly add by refractory material the granular and powder material that a certain amount of bonding agent makes, has comparatively high workability, with the unshape refractory that pouring type is shaping.Compare with other unshape refractories, bonding agent and moisture content higher, mobility is better, so mould material range of application is comparatively wide, can be selected according to working conditions to material used and bonding agent.Both directly can pour into lining body to use, available cast or bumping method make prefabricated section use again.The castable hydration resistance of prior art is poor, easily ftractures.
[summary of the invention]
Object of the present invention solves the problems of the prior art exactly, and propose a kind of preparation method of water resistant castable, the mould material prepared has good hydration resistance.
For achieving the above object, the present invention proposes a kind of preparation method of water resistant castable, comprise the following steps successively:
A) preparating mixture material, mixture comprises following component and the ratio of each component is: magnesia: 25 ~ 35 parts, spinel: 15 ~ 25 parts, corundum: 15 ~ 25 parts, aluminous cement: 5 ~ 10 parts, fine silica powder: 2 ~ 8 parts, graphite: 1 ~ 5 part, Sodium hexametaphosphate 99: 3 ~ 10 parts, boric acid: 4 ~ 9 parts, oxalic acid: 2 ~ 6 parts, calcium oxide: 3 ~ 9 parts, boron oxide: 5 ~ 10 parts, nickel oxide: 2 ~ 8 parts, organic fibre: 15 ~ 25 parts, metallic aluminium powder: 0.1 ~ 3 part, organosilane: 3 ~ 10 parts, nano-calcium carbonate magnesium: 5 ~ 15 parts;
B) by step a) in mixture first carry out break process through crusher, then mixture is dropped in shredder and carry out grinding 2 ~ 4h, then mixture is dropped in stirrer, and fully stir after adding 120 parts of water, the material injection mould after stirring is formed stock;
C) stock in b) step is carried out sintering processes, described sintering processes comprises with the next stage:
C1) be positioned in agglomerating plant by stock, agglomerating plant is heated to 100 ~ 150 DEG C with the heat-up rate of 30 DEG C/h, insulation 3 ~ 5h;
C2) then agglomerating plant is heated to 300 ~ 400 DEG C with the heat-up rate of 50 DEG C/h, insulation 4 ~ 6h;
C3) then agglomerating plant is heated to 500 ~ 600 DEG C with the heat-up rate of 50 DEG C/h, insulation 4 ~ 6h;
C4) then agglomerating plant is heated to 800 ~ 1000 DEG C with the heat-up rate of 100 DEG C/h, insulation 4 ~ 6h;
C5) then agglomerating plant is heated to 1000 ~ 1500 DEG C with the heat-up rate of 100 DEG C/h, insulation 4 ~ 6h, after naturally cooling to shaping mould material.
As preferably, the particle diameter of described magnesia is 3 ~ 10mm, and the particle diameter of corundum is 2 ~ 5mm, and described corundum adopts plate diamond spar.
As preferably, described magnesia is the magnesite clinker extracting production from seawater, in magnesia containing MgO 95 ~ 99.5%, magnesia volume density is 3.30 ~ 3.45g/cm
3.
As preferably, described organic fibre is polyparaphenylene's benzo-dioxazole fiber, poly-to any one in benzoglyoxaline fiber, polyhenylene pyrido diimidazole fiber.
Beneficial effect of the present invention: the present invention adopts seawater magnesia, the purity of magnesia is high, density is high, high-temperature behavior is good, mainly for the production of high-quality magnesia fireproof goods, in component, add calcium oxide, boron oxide, nickel oxide simultaneously, said components can form Solid solution with magnesium oxide, SiO under the normal temperature in component
2after super-fine powder meets water, its surface forms hydroxyl, i.e. Si-OH key, and after natural curing and drying, dehydration bridge formation defines siloxane network structure.Meanwhile, because there is the O of a large amount of non-bonding on its surface
2-, and O
2-be easy to the Mg being adsorbed on MgO particle surface
2+ion is formed magnesia silicon chain, thus decrease and Mg
2+in conjunction with OH
-group, compared with formation H-O-Mg-O-H and hydrogen-oxygen silicon chain, water molecules decreases.Often form a magnesia silicon chain and can reduce by a water molecules.Because the water yield of discharging reduces, reduce the possibility ftractureed in magnesia product bake process.Simultaneously because MgO particle is interconnected by magnesia silicon chain, thus improve the intensity of product; The organosilane added can produce package action to magnesium oxide, can improve the hydration resistance of castable further; In addition partial oxidation magnesium adopts the decomposition of nano-calcium carbonate magnesium obtained, and the distribution of mould material inner materials is more even, effectively can improve resistance to flaking and the resistance to slag corrosion of mould material.
[embodiment]
A preparation method for water resistant castable, comprises the following steps successively:
A) preparating mixture material, mixture comprises following component and the ratio of each component is: magnesia: 25 ~ 35 parts, spinel: 15 ~ 25 parts, corundum: 15 ~ 25 parts, aluminous cement: 5 ~ 10 parts, fine silica powder: 2 ~ 8 parts, graphite: 1 ~ 5 part, Sodium hexametaphosphate 99: 3 ~ 10 parts, boric acid: 4 ~ 9 parts, oxalic acid: 2 ~ 6 parts, calcium oxide: 3 ~ 9 parts, boron oxide: 5 ~ 10 parts, nickel oxide: 2 ~ 8 parts, organic fibre: 15 ~ 25 parts, metallic aluminium powder: 0.1 ~ 3 part, organosilane: 3 ~ 10 parts, nano-calcium carbonate magnesium: 5 ~ 15 parts;
B) by step a) in mixture first carry out break process through crusher, then mixture is dropped in shredder and carry out grinding 2 ~ 4h, then mixture is dropped in stirrer, and fully stir after adding 120 parts of water, the material injection mould after stirring is formed stock;
C) stock in b) step is carried out sintering processes, described sintering processes comprises with the next stage:
C1) be positioned in agglomerating plant by stock, agglomerating plant is heated to 100 ~ 150 DEG C with the heat-up rate of 30 DEG C/h, insulation 3 ~ 5h;
C2) then agglomerating plant is heated to 300 ~ 400 DEG C with the heat-up rate of 50 DEG C/h, insulation 4 ~ 6h;
C3) then agglomerating plant is heated to 500 ~ 600 DEG C with the heat-up rate of 50 DEG C/h, insulation 4 ~ 6h;
C4) then agglomerating plant is heated to 800 ~ 1000 DEG C with the heat-up rate of 100 DEG C/h, insulation 4 ~ 6h;
C5) then agglomerating plant is heated to 1000 ~ 1500 DEG C with the heat-up rate of 100 DEG C/h, insulation 4 ~ 6h, after naturally cooling to shaping mould material.
Embodiment one:
A kind of preparation method of water resistant castable, mixture comprises following component and the ratio of each component is: magnesia: 25 parts, spinel: 15 parts, corundum: 15 parts, aluminous cement: 5 parts, fine silica powder: 2 parts, graphite: 1 part, Sodium hexametaphosphate 99: 3 parts, boric acid: 4 parts, oxalic acid: 2 parts, calcium oxide: 3 parts, boron oxide: 5 parts, nickel oxide: 2 parts, organic fibre: 15 parts, metallic aluminium powder: 0.1 part, organosilane: 3 parts, nano-calcium carbonate magnesium: 5 parts, the particle diameter of magnesia is 3mm, the particle diameter of corundum is 2mm, described corundum adopts plate diamond spar, magnesia is the magnesite clinker extracting production from seawater, MgO is contained 95 ~ 99.5% in magnesia, magnesia volume density is 3.30 ~ 3.45g/cm
3, organic fibre is polyparaphenylene's benzo-dioxazole fiber.
Embodiment two:
A kind of preparation method of water resistant castable, mixture comprises following component and the ratio of each component is: magnesia: 30 parts, spinel: 18 parts, corundum: 19 parts, aluminous cement: 7 parts, fine silica powder: 6 parts, graphite: 4 parts, Sodium hexametaphosphate 99: 7 parts, boric acid: 6 parts, oxalic acid: 4 parts, calcium oxide: 6 parts, boron oxide: 8 parts, nickel oxide: 5 parts, organic fibre: 19 parts, metallic aluminium powder: 0.5 part, organosilane: 6 parts, nano-calcium carbonate magnesium: 8 parts, the particle diameter of magnesia is 8mm, the particle diameter of corundum is 4mm, described corundum adopts plate diamond spar, magnesia is the magnesite clinker extracting production from seawater, MgO is contained 95 ~ 99.5% in magnesia, magnesia volume density is 3.30 ~ 3.45g/cm
3, organic fibre is for gathering benzoglyoxaline fiber.
Embodiment three:
A kind of preparation method of water resistant castable, mixture comprises following component and the ratio of each component is: magnesia: 35 parts, spinel: 25 parts, corundum: 25 parts, aluminous cement: 10 parts, fine silica powder: 8 parts, graphite: 5 parts, Sodium hexametaphosphate 99: 10 parts, boric acid: 9 parts, oxalic acid: 6 parts, calcium oxide: 9 parts, boron oxide: 10 parts, nickel oxide: 8 parts, organic fibre: 25 parts, metallic aluminium powder: 2 parts, organosilane: 10 parts, nano-calcium carbonate magnesium: 15 parts, the particle diameter of magnesia is 10mm, the particle diameter of corundum is 5mm, described corundum adopts plate diamond spar, magnesia is the magnesite clinker extracting production from seawater, MgO is contained 95 ~ 99.5% in magnesia, magnesia volume density is 3.30 ~ 3.45g/cm
3, organic fibre is polyparaphenylene's benzo-dioxazole fiber.
Above-described embodiment is to explanation of the present invention, is not limitation of the invention, anyly all belongs to protection scope of the present invention to the scheme after simple transformation of the present invention.
Claims (5)
1. a preparation method for water resistant castable, comprises the following steps successively:
A) preparating mixture material, mixture comprises following component and the ratio of each component is: magnesia: 25 ~ 35 parts, spinel: 15 ~ 25 parts, corundum: 15 ~ 25 parts, aluminous cement: 5 ~ 10 parts, fine silica powder: 2 ~ 8 parts, graphite: 1 ~ 5 part, Sodium hexametaphosphate 99: 3 ~ 10 parts, boric acid: 4 ~ 9 parts, oxalic acid: 2 ~ 6 parts, calcium oxide: 3 ~ 9 parts, boron oxide: 5 ~ 10 parts, nickel oxide: 2 ~ 8 parts, organic fibre: 15 ~ 25 parts, metallic aluminium powder: 0.1 ~ 3 part, organosilane: 3 ~ 10 parts, nano-calcium carbonate magnesium: 5 ~ 15 parts;
B) by step a) in mixture first carry out break process through crusher, then mixture is dropped in shredder and carry out grinding 2 ~ 4h, then mixture is dropped in stirrer, and fully stir after adding 120 parts of water, the material injection mould after stirring is formed stock;
C) stock in b) step is carried out sintering processes, described sintering processes comprises with the next stage:
C1) be positioned in agglomerating plant by stock, agglomerating plant is heated to 100 ~ 150 DEG C with the heat-up rate of 30 DEG C/h, insulation 3 ~ 5h;
C2) then agglomerating plant is heated to 300 ~ 400 DEG C with the heat-up rate of 50 DEG C/h, insulation 4 ~ 6h;
C3) then agglomerating plant is heated to 500 ~ 600 DEG C with the heat-up rate of 50 DEG C/h, insulation 4 ~ 6h;
C4) then agglomerating plant is heated to 800 ~ 1000 DEG C with the heat-up rate of 100 DEG C/h, insulation 4 ~ 6h;
C5) then agglomerating plant is heated to 1000 ~ 1500 DEG C with the heat-up rate of 100 DEG C/h, insulation 4 ~ 6h, after naturally cooling to shaping mould material.
2. the preparation method of a kind of water resistant castable as claimed in claim 1, is characterized in that: the particle diameter of described magnesia is 3 ~ 10mm, and the particle diameter of corundum is 2 ~ 5mm, and described corundum adopts plate diamond spar.
3. the preparation method of a kind of water resistant castable as claimed in claim 1, is characterized in that: described magnesia is the magnesite clinker extracting production from seawater, and contain MgO in magnesia 95 ~ 99.5%, magnesia volume density is 3.30 ~ 3.45g/cm
3.
4. the preparation method of a kind of water resistant castable as claimed in claim 1, is characterized in that: described organic fibre is polyparaphenylene's benzo-dioxazole fiber, gathers any one in benzoglyoxaline fiber, polyhenylene pyrido diimidazole fiber.
5. the preparation method of a kind of water resistant castable as claimed in claim 1, is characterized in that: described sintering processes comprises with the next stage:
C1) be positioned in agglomerating plant by stock, agglomerating plant is heated to 130 DEG C with the heat-up rate of 30 DEG C/h, insulation 3h;
C2) then agglomerating plant is heated to 340 DEG C with the heat-up rate of 50 DEG C/h, insulation 4h;
C3) then agglomerating plant is heated to 520 DEG C with the heat-up rate of 50 DEG C/h, insulation 4h;
C4) then agglomerating plant is heated to 950 DEG C with the heat-up rate of 100 DEG C/h, insulation 4h;
C5) then agglomerating plant is heated to 1200 DEG C with the heat-up rate of 100 DEG C/h, insulation 5h, after naturally cooling to shaping mould material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109437938A (en) * | 2018-12-28 | 2019-03-08 | 江苏嘉耐高温材料有限公司 | A kind of liner in dundish castable |
| CN110776312A (en) * | 2019-09-30 | 2020-02-11 | 山东耀华特耐科技有限公司 | Cement-free castable |
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| CN101508587A (en) * | 2009-03-26 | 2009-08-19 | 中钢集团洛阳耐火材料研究院有限公司 | Corundum-spinel pouring material containing nano-magnesium carbonate |
| CN102838360A (en) * | 2012-09-12 | 2012-12-26 | 首钢总公司 | Composite fireproof material and preparation method thereof |
| CN103724026A (en) * | 2013-12-30 | 2014-04-16 | 江苏苏嘉集团新材料有限公司 | Magnesium carbon-based castable |
| CN104250099A (en) * | 2013-06-25 | 2014-12-31 | 上海宝钢工业技术服务有限公司 | Al2O3-MgO refractory castable and preparation method thereof |
-
2015
- 2015-07-13 CN CN201510408485.2A patent/CN104987095A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101508587A (en) * | 2009-03-26 | 2009-08-19 | 中钢集团洛阳耐火材料研究院有限公司 | Corundum-spinel pouring material containing nano-magnesium carbonate |
| CN102838360A (en) * | 2012-09-12 | 2012-12-26 | 首钢总公司 | Composite fireproof material and preparation method thereof |
| CN104250099A (en) * | 2013-06-25 | 2014-12-31 | 上海宝钢工业技术服务有限公司 | Al2O3-MgO refractory castable and preparation method thereof |
| CN103724026A (en) * | 2013-12-30 | 2014-04-16 | 江苏苏嘉集团新材料有限公司 | Magnesium carbon-based castable |
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| Y.C.KO: "Effect of compositional variables on the properties of alumina-magnesia castables", 《INTERCERAM》 * |
| 李志刚等: "高纯铝镁质浇注料研究进展", 《硅酸盐通报》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109437938A (en) * | 2018-12-28 | 2019-03-08 | 江苏嘉耐高温材料有限公司 | A kind of liner in dundish castable |
| CN110776312A (en) * | 2019-09-30 | 2020-02-11 | 山东耀华特耐科技有限公司 | Cement-free castable |
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