CN103387399A - Pouring method of aluminium melting furnace - Google Patents
Pouring method of aluminium melting furnace Download PDFInfo
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- CN103387399A CN103387399A CN2013103153979A CN201310315397A CN103387399A CN 103387399 A CN103387399 A CN 103387399A CN 2013103153979 A CN2013103153979 A CN 2013103153979A CN 201310315397 A CN201310315397 A CN 201310315397A CN 103387399 A CN103387399 A CN 103387399A
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Abstract
The invention relates to a pouring method of an aluminium melting furnace, belonging to the field of refractory castable. The pouring method comprises the following steps of batching the following components in parts by weight: 50-70 parts of tabular corundum, 20-40 parts of calcium aluminate, 8-15 parts of fine magnesite powder, 4-13 parts of aluminium oxide micro powder, 5-10 parts of MgAl2O4, 0.5-4 parts of C12H25SO3Na, 1-3 parts of anti-seepage agent, 0.25-0.8 part of corrosion inhibitor, 4-8 parts of first compound formed by chromic salt-thiourea and chromic salt-sodium thiosulfate, and 2-9 parts of second compound formed by metaphosphate and polyphosphate; vibrating the castable after the batching in a vibration device for 3-5 minutes; mounting a mould, adding the ingredients after the vibration, and adding liquid sodium silicate, wherein the weight of the liquid sodium silicate is 3-8% of the total amount of the castable; stirring for 6-9 minutes, and naturally curing for 3-5 hours; and demoulding to obtain an aluminium melting furnace. The castable provided by the invention can improve the corrosion and seepage resistance of the castable, the preservation period of the castable is long, and the pollution to the molten aluminium is avoided at the same time.
Description
Technical field
The present invention relates to a kind of pouring procedure of molten aluminium stove, belong to the refractory castable field.
Background technology
Use the high-speed flame shock heat in molten aluminium stove, in less melting chamber high-speed flame be directly injected to preheated aluminium material and the aluminium liquid that melted on, realize rapid melting, not only save energy but also reduced scaling loss, therefore refractory materials uses harshness relatively, and there is generation in the urgent stopping time of production that is caused by the refractory materials damage.
Summary of the invention
The purpose of this invention is to provide the molten aluminium stove mould material that a kind of anti-erosion that can improve mould material and anti-permeability performance, mould material retention period are long, simultaneously aluminium liquid is not polluted.
Above-mentioned technical purpose of the present invention is achieved by the following technical programs:
A kind of pouring procedure of molten aluminium stove comprises step:
A. prepare burden: weighing plate diamond spar 50-70 part, calcium hexaluminate are 20-40 part, magnesia powder 8-15 part, alumina powder 4-13 part, MgAl by weight
2O
45-10 part, C
12H
25SO
3Second mixture 2-9 part that first mixture 4-8 part that Na 0.5-4 part, permeability-reducing admixture 1-3 part, rust inhibitor 0.25-0.8 part, chromic salts-thiocarbamide and chromic salts-Sulfothiorine forms, metaphosphate and poly-phosphate form;
B. construction: the mould material after preparing burden is at vibrating device internal vibration 3-5min; Installation mold, to the batching that adds in mould after vibration, then add liquid sodium silicate, and the weight of described liquid sodium silicate is the mould material total amount of 3-8%, and after stirring 6-9min, after natural curing 3-5h, the demoulding must be melted the aluminium stove.
Advantage of the present invention is:
(1) utilize plate diamond spar to be aggregate, with the synthetic compound introducing MgAl of mode of original position
2O
4, the shortcoming that improves a little less than the poor and thermostability of traditional corundum based refractory materials erosion-resisting characteristics is had effect preferably;
(2) adopt especially C of the plate diamond spar of the specific proportioning of the present invention and calcium hexaluminate and all the other components
12H
25SO
3The combination of Na, the first mixture and the second mixture, can extend the mould material retention period, improved existing mould material and deposited after certain hour while re-using, and mould material lacks mobility, the phenomenon of various poor-performings;
(3) mould material that adopts the specific proportioning of the present invention after abundant stirring homogenizing, has the reaction of discord aluminium liquid, does not pollute aluminium liquid, the characteristics such as is not wetted by aluminum, anti-aluminium liquid infiltration and corrode very excellent.
As preferably, described permeability-reducing admixture and rust inhibitor are selected from the Zibo, Shandong Province Zhou village product produced of super chemical plant forever.
As preferably, in described the first mixture, chromic salts-thiocarbamide and chromic salts-Sulfothiorine mix by 1:1.
As preferably, described the second mixture is the mixture of tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, and described tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mix by the 7:3 weight ratio.
The tripoly phosphate sodium STPP of the specific proportioning of the present invention and the mixture of Sodium hexametaphosphate 99 not only make the volume density of product reduce as preservatives, thermal conductivity reduces, better heat preservation, reduced again simultaneously the usage quantity of colloidal sol, also improved the thermal shock resistance of mould material, the most important thing is also to have improved the yield point value of mould material, extend the mould material retention period.Improved existing mould material and deposited after certain hour while re-using, mould material lacks mobility, the phenomenon of various poor-performings.
As preferably, the quality index of described plate diamond spar is: Al
2O
3〉=99%.
As preferably, the quality index of described alumina powder is: Al
2O
3〉=99%.
As preferably, the quality index of magnesia powder is: MgO 〉=97%, Al
2O
30.05-0.15%.
As preferably, described steps A weighing plate diamond spar 55-65 part, calcium hexaluminate by weight is 25-30 part, magnesia powder 9-12 part, alumina powder 5-10 part, MgAl
2O
45-10 part, C
12H
25SO
3Second mixture 3-6 part that first mixture 5-7 part that Na 1-2 part, permeability-reducing admixture 1-3 part, rust inhibitor 0.4-0.5 part, chromic salts-thiocarbamide and chromic salts-Sulfothiorine forms, metaphosphate and poly-phosphate form.
As preferably, also comprise 4-8 weight part aluminum oxide and silicon dioxide gel composite suspension liquid in described steps A batching, described aluminum oxide and silicon dioxide gel mix by the 1:1 weight ratio.
The present invention makes nano-grade ceramic binding agent by aluminum oxide and silicon dioxide gel composite suspension liquid, directly join in the molten aluminium stove mould material that compositions such as adopting lightweight clay brick and perlite are mixed into, pass through in-situ synthesized reaction, form nano-structured matrix, made the molten aluminium stove mould material of the compound oxidate ceramic combination of this product, make that mould material high volume stability is strong, thermal shock resistance is high, longer service life, preservation period is longer.
Embodiment
Molten aluminium stove casting material formula 1: weighing by weight
50 parts of plate diamond spars, quality index is: Al
2O
3〉=99%;
Calcium hexaluminate is 20 parts;
8 parts of magnesia powders, quality index is: MgO 〉=97%, Al
2O
30.05-0.15%;
4 parts of alumina powders, quality index is: Al
2O
3〉=99%;
MgAl
2O
45 parts, C
12H
25SO
32 parts of the second mixtures that 4 parts of the first mixtures that 0.5 part of Na, 1 part of permeability-reducing admixture, 0.25 part of rust inhibitor, chromic salts-thiocarbamide and chromic salts-Sulfothiorine forms, metaphosphate and poly-phosphate form; Wherein permeability-reducing admixture and the rust inhibitor super chemical plant purchase forever from the Zibo, Shandong Province Zhou village; In described the first mixture, chromic salts-thiocarbamide and chromic salts-Sulfothiorine mix by 2:1; The second mixture is the mixture of tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, and described tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mix by the 7:3 weight ratio.
Molten aluminium stove casting material formula 2: weighing by weight
70 parts of plate diamond spars, quality index is: Al
2O
3〉=99%;
Calcium hexaluminate is 40 parts;
15 parts of magnesia powders, quality index is: MgO 〉=97%, Al
2O
30.05-0.15%;
13 parts of alumina powders, quality index is: Al
2O
3〉=99%;
MgAl
2O
410 parts, C
12H
25SO
39 parts of the second mixtures that 8 parts of the first mixtures that 4 parts of Na, 3 parts of permeability-reducing admixtures, 0.8 part of rust inhibitor, chromic salts-thiocarbamide and chromic salts-Sulfothiorine forms, metaphosphate and poly-phosphate form; Wherein permeability-reducing admixture and the rust inhibitor super chemical plant purchase forever from the Zibo, Shandong Province Zhou village; In described the first mixture, chromic salts-thiocarbamide and chromic salts-Sulfothiorine mix by 1:1; The second mixture is the mixture of tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, and described tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mix by the 5:3 weight ratio.
Molten aluminium stove casting material formula 3: weighing by weight
55 parts of plate diamond spars, quality index is: Al
2O
3〉=99%;
Calcium hexaluminate is 25 parts;
9 parts of magnesia powders, quality index is: MgO 〉=97%, Al
2O
30.05-0.15%;
5 parts of alumina powders, quality index is: Al
2O
3〉=99%;
MgAl
2O
45 parts, C
12H
25SO
33 parts of the second mixtures that 5 parts of the first mixtures that 1 part of Na, 1 part of permeability-reducing admixture, 0.4 part of rust inhibitor, chromic salts-thiocarbamide and chromic salts-Sulfothiorine forms, metaphosphate and poly-phosphate form;
4 weight part aluminum oxide and silicon dioxide gel composite suspension liquid, described aluminum oxide and silicon dioxide gel mix by the 1:1 weight ratio;
Wherein permeability-reducing admixture and the rust inhibitor super chemical plant purchase forever from the Zibo, Shandong Province Zhou village; In described the first mixture, chromic salts-thiocarbamide and chromic salts-Sulfothiorine mix by 1:1; The second mixture is the mixture of tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, and described tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mix by the 7:3 weight ratio.
Molten aluminium stove casting material formula 4: weighing by weight
65 parts of plate diamond spars, quality index is: Al
2O
3〉=99%;
Calcium hexaluminate is 30 parts;
12 parts of magnesia powders, quality index is: MgO 〉=97%, Al
2O
30.05-0.15%;
10 parts of alumina powders, quality index is: Al
2O
3〉=99%;
MgAl
2O
410 parts, C
12H
25SO
36 parts of the second mixtures that 7 parts of the first mixtures that 2 parts of Na, 3 parts of permeability-reducing admixtures, 0.5 part of rust inhibitor, chromic salts-thiocarbamide and chromic salts-Sulfothiorine forms, metaphosphate and poly-phosphate form;
8 weight part aluminum oxide and silicon dioxide gel composite suspension liquid, described aluminum oxide and silicon dioxide gel mix by the 1:1 weight ratio;
Wherein permeability-reducing admixture and the rust inhibitor super chemical plant purchase forever from the Zibo, Shandong Province Zhou village; In described the first mixture, chromic salts-thiocarbamide and chromic salts-Sulfothiorine mix by 1:1; The second mixture is the mixture of tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, and described tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mix by the 7:3 weight ratio.
Embodiment one
According to molten aluminium stove casting material formula 1 batching, with the mould material after batching at vibrating device internal vibration 3min; Installation mold, to the batching that adds in mould after vibration, then add liquid sodium silicate, and the weight of described liquid sodium silicate is 3% mould material total amount, and after stirring 6min, after natural curing 3h, the demoulding must be melted the aluminium stove.
Horizontal molten aluminium stove has adopted this molten aluminium stove mould material.After blowing out checks, molten aluminium stove working lining smooth surface, the bulging breakoff phenomenon, do not occur in non-corrosive fusion hole.After removing refractory materials, cutting refractory material lining body is found, and is without the erosion phenomenon of osmosis of aluminium liquid, inner without any damage phenomenon from the refractory surface to inside.Estimate that work-ing life, obviously product life more used was long than in the past.
Embodiment two
According to molten aluminium stove casting material formula 2 batchings, with the mould material after batching at vibrating device internal vibration 5min; Installation mold, to the batching that adds in mould after vibration, then add liquid sodium silicate, and the weight of described liquid sodium silicate is 8% mould material total amount, and after stirring 9min, after natural curing 5h, the demoulding must be melted the aluminium stove.
Embodiment three
According to molten aluminium stove casting material formula 3 batchings, with the mould material after batching at vibrating device internal vibration 4min; Installation mold, to the batching that adds in mould after vibration, then add liquid sodium silicate, and the weight of described liquid sodium silicate is 5% mould material total amount, and after stirring 8min, after natural curing 4h, the demoulding must be melted the aluminium stove.
Embodiment four
According to molten aluminium stove casting material formula 4 batchings, with the mould material after batching at vibrating device internal vibration 4min; Installation mold, to the batching that adds in mould after vibration, then add liquid sodium silicate, and the weight of described liquid sodium silicate is 5% mould material total amount, and after stirring 8min, after natural curing 4h, the demoulding must be melted the aluminium stove.
The comparative example one
Molten aluminium stove casting material formula is that 40 parts of plate diamond spars, calcium hexaluminate are 50 parts, 6 parts of magnesia powders, 15 parts of alumina powders, MgAl
2O
42 parts, C
12H
25SO
315 parts of the second mixtures that 2 parts of the first mixtures that 8 parts of Na, 5 parts of permeability-reducing admixtures, 1 part of rust inhibitor, chromic salts-thiocarbamide and chromic salts-Sulfothiorine forms, metaphosphate and poly-phosphate form.
The comparative example two
Molten aluminium stove casting material formula is that 40 parts of plate diamond spars, calcium hexaluminate are 50 parts, 6 parts of magnesia powders, 15 parts of alumina powders, MgAl
2O
412 parts of the first mixtures that 2 parts, 5 parts of permeability-reducing admixtures, 1 part of rust inhibitor, chromic salts-thiocarbamide and chromic salts-Sulfothiorine forms.
Table 1 embodiment and comparative example's product performance relatively
Can find out from form,
(1) compressive strength of the present invention and High anti bending strength, heating permanent line velocity of variation is little, therefore long service life, the melting loss speed of product low, antioxidant property is strong, the product effect that wherein adopts optimal way of the present invention to obtain is best, sees embodiment 3;
(2) volume density of the present invention is larger, and good volume stability has been arranged.Make that mould material high volume stability is strong, thermal shock resistance is high, longer service life;
(3) anti-erosion of the present invention and anti-permeability performance are good; The mould material retention period is long.
This specific embodiment is only explanation of the invention; it is not limitation of the present invention; those skilled in the art can make to the present embodiment the modification that there is no creative contribution as required after reading this specification sheets, but as long as all are subject to the protection of patent law in claim scope of the present invention.
Claims (9)
1. the pouring procedure of a molten aluminium stove is characterized in that comprising step:
A. prepare burden: weighing plate diamond spar 50-70 part, calcium hexaluminate are 20-40 part, magnesia powder 8-15 part, alumina powder 4-13 part, MgAl by weight
2O
45-10 part, C
12H
25SO
3Second mixture 2-9 part that first mixture 4-8 part that Na 0.5-4 part, permeability-reducing admixture 1-3 part, rust inhibitor 0.25-0.8 part, chromic salts-thiocarbamide and chromic salts-Sulfothiorine forms, metaphosphate and poly-phosphate form;
B. construction: the mould material after preparing burden is at vibrating device internal vibration 3-5min; Installation mold, to the batching that adds in mould after vibration, then add liquid sodium silicate, and the weight of described liquid sodium silicate is the mould material total amount of 3-8%, and after stirring 6-9min, after natural curing 3-5h, the demoulding must be melted the aluminium stove.
2. the pouring procedure of a kind of molten aluminium stove according to claim 1 is characterized in that: described permeability-reducing admixture and rust inhibitor are selected from the Zibo, Shandong Province Zhou village product produced of super chemical plant forever.
3. the pouring procedure of a kind of molten aluminium stove according to claim 2, it is characterized in that: in described the first mixture, chromic salts-thiocarbamide and chromic salts-Sulfothiorine mix by 1:1.
4. the pouring procedure of a kind of molten aluminium stove according to claim 3, it is characterized in that: described the second mixture is the mixture of tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, and described tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mix by the 7:3 weight ratio.
5. the pouring procedure of a kind of molten aluminium stove according to claim 4, it is characterized in that: the quality index of described plate diamond spar is: Al
2O
3〉=99%.
6. the pouring procedure of a kind of molten aluminium stove according to claim 5, it is characterized in that: the quality index of described alumina powder is: Al
2O
3〉=99%.
7. the pouring procedure of a kind of molten aluminium stove according to claim 6, it is characterized in that: the quality index of described magnesia powder is: MgO 〉=97%, Al
2O
30.05-0.15%.
8. the pouring procedure of a kind of molten aluminium stove according to claim 7, it is characterized in that: described steps A weighing plate diamond spar 55-65 part, calcium hexaluminate by weight is 25-30 part, magnesia powder 9-12 part, alumina powder 5-10 part, MgAl
2O
45-10 part, C
12H
25SO
3Second mixture 3-6 part that first mixture 5-7 part that Na 1-2 part, permeability-reducing admixture 1-3 part, rust inhibitor 0.4-0.5 part, chromic salts-thiocarbamide and chromic salts-Sulfothiorine forms, metaphosphate and poly-phosphate form.
9. the pouring procedure of a kind of molten aluminium stove according to claim 8, it is characterized in that: also comprise 4-8 weight part aluminum oxide and silicon dioxide gel composite suspension liquid in described steps A batching, described aluminum oxide and silicon dioxide gel mix by the 1:1 weight ratio.
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|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114085088A (en) * | 2021-12-28 | 2022-02-25 | 郑州金世耐火材料有限公司 | Dry-type self-closing anti-seepage material for preventing high-temperature solution of sodium sulfide and sodium sulfate |
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|---|---|---|---|---|
| CN101016211A (en) * | 2006-12-21 | 2007-08-15 | 武汉科技大学 | Aluminum-magnesium series lightweight pouring material and manufacturing method thereof |
| CN101353177A (en) * | 2008-09-11 | 2009-01-28 | 上海交通大学 | Method for producing calcium hexaluminate with waste aluminum ash |
| CN101407425A (en) * | 2008-10-24 | 2009-04-15 | 浙江锦诚耐火材料有限公司 | Corundum spinelle kilneye fire resistant pouring material |
| CN102531652A (en) * | 2012-01-11 | 2012-07-04 | 浙江大学 | Aluminium-repellent basalt and preparation method thereof |
| CN102775114A (en) * | 2012-07-30 | 2012-11-14 | 浙江锦诚耐火材料有限公司 | Choke block for aluminum electrolytic bath |
-
2013
- 2013-07-25 CN CN201310315397.9A patent/CN103387399B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101016211A (en) * | 2006-12-21 | 2007-08-15 | 武汉科技大学 | Aluminum-magnesium series lightweight pouring material and manufacturing method thereof |
| CN101353177A (en) * | 2008-09-11 | 2009-01-28 | 上海交通大学 | Method for producing calcium hexaluminate with waste aluminum ash |
| CN101407425A (en) * | 2008-10-24 | 2009-04-15 | 浙江锦诚耐火材料有限公司 | Corundum spinelle kilneye fire resistant pouring material |
| CN102531652A (en) * | 2012-01-11 | 2012-07-04 | 浙江大学 | Aluminium-repellent basalt and preparation method thereof |
| CN102775114A (en) * | 2012-07-30 | 2012-11-14 | 浙江锦诚耐火材料有限公司 | Choke block for aluminum electrolytic bath |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114085088A (en) * | 2021-12-28 | 2022-02-25 | 郑州金世耐火材料有限公司 | Dry-type self-closing anti-seepage material for preventing high-temperature solution of sodium sulfide and sodium sulfate |
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|---|---|
| CN103387399B (en) | 2014-09-10 |
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Address after: 313100 new industrial park, pheasant City, Huzhou, Zhejiang, Changxing County Patentee after: Zhejiang Jincheng new material Limited by Share Ltd Address before: 313100 Changxing County Jincheng Industrial Zone, Zhejiang, Huzhou, Zhejiang Province Jincheng refractory material Co., Ltd. Patentee before: Zhejiang Jincheng Refractories Co., Ltd. |