CN103739290A - Silicon carbide product for aluminum electrolysis cell and preparation method thereof - Google Patents
Silicon carbide product for aluminum electrolysis cell and preparation method thereof Download PDFInfo
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- CN103739290A CN103739290A CN201310697959.0A CN201310697959A CN103739290A CN 103739290 A CN103739290 A CN 103739290A CN 201310697959 A CN201310697959 A CN 201310697959A CN 103739290 A CN103739290 A CN 103739290A
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Abstract
The invention discloses a silicon carbide product for an aluminum electrolysis cell and a preparation method thereof. The preparation method comprises the following steps: premixing the following components in parts by weight in a ball mill: 10-25 parts of 200-300 meshes silicon carbide fine powder, 1-5 parts of silicon metal powder, 2-5 parts of carbon-containing fine powder and 0.3-3 parts of ferrosilicon fine powder; then, adding 10-30 parts of silicon carbide aggregate with particle size of 2.5-1.43 mm, 20-55 parts of silicon carbide aggregate with particle size of 1.43-0.5 mm and 5-10 parts of silicon carbide aggregate with particle size of 0.5-0 mm, mixing the silicon carbide aggregates in an edge runner; and finally, adding a proper amount of water and 3-4 parts of yellow dextrin or resin to prepare pug, making the pug into a blank by using a friction press, drying the blank, bury sintering the blank in a sagger filled with graphite at a sintering temperature of 1420-1550 DEG C, and maintaining the temperature for 5-10 hours to obtain the silicon carbide product. The silicon carbide product disclosed by the invention reduces the sintering temperature, achieves high strength and corrosion resistance and has low cost, thereby benefiting the market promotion of the product.
Description
Technical field
The present invention relates to a kind of aluminum electrolyzing cell used silicon carbide articles and preparation method thereof, belong to refractory materials preparing technical field.
Background technology
High-temperature refractory is the structured material with high temperature resistant function using in high-temperature furnace body, and nearly all elevated temperature vessel and device interior all need supporting refractory materials, realizes the work of technical matters condition and the protection furnace binding long-term stability of high temperature.In electrolysis of aluminum industry, current the used refractory materials of aluminium cell is silicon carbide articles, by being divided into silicon nitride combined silicon carbide in conjunction with phase; Silicon carbide reaction-sintered is from silicon carbide; Silicate silicon carbide etc.
Silicon nitride combined silicon carbide can not meet the high heat conduction index of the above aluminium cell of 500KA, though silicon carbide reaction-sintered can meet high heat conduction requirement, but because a large amount of highly active Pure Silicon Metals (Si > 5%) are contained in inside, not resistance to erosion, has limited it in the use of aluminium cell; From silicon carbide, because cost is too high, though have high thermal conductivity, erosion resistant advantage, marketing is also more difficult, and existing some high-end markets that are only used in are very little in batches; Silicate silicon carbide can not meet the requirement of high thermal conductivity, resistance to erosion two aspects.
Summary of the invention
In order to overcome above-mentioned defect, the invention provides a kind of aluminum electrolyzing cell used silicon carbide articles, this goods cost is low, can realize the performance of high-strength corrosion-resistant erosion, high heat conduction, and the preparation method of this silicon carbide articles is provided.
To achieve these goals, technical scheme of the present invention is:
An aluminum electrolyzing cell used silicon carbide articles, is comprised of aggregate, powder, admixture and tackiness agent;
Described aggregate comprises that particle diameter is that 2.5～1.43mm carborundum aggregate, particle diameter are that 1.43～0.5mm carborundum aggregate, particle diameter are 0.5～0mm carborundum aggregate;
Described powder is 200 order～320 object carbide fine powder;
Described admixture comprises metallic silicon power, contains carbon fine powder and ferro-silicon alloy powder;
Described tackiness agent is yellow starch gum or resin;
In aggregate, powder, admixture and tackiness agent quality sum,
Particle diameter is that the mass fraction of 2.5～1.43mm carborundum aggregate is that 10～30 parts, particle diameter are that the mass fraction of 1.43～0.5mm carborundum aggregate is that 20～55 parts, particle diameter are that the mass fraction of 0.5～0mm carborundum aggregate is 5～10 parts;
The mass fraction of 200 order～320 object carbide fine powder is 10～25 parts;
The mass fraction of metallic silicon power is 1～5 part, and the mass fraction that contains carbon fine powder is 2～5 parts, and the mass fraction of ferrosilicon fine powder is 0.3～3 part;
The mass fraction of yellow starch gum or resin is 3～4 parts.
The present invention also provides the preparation method who manufactures these silicon nitride goods, and its processing method is:
First according to mass fraction by carbide fine powder, metallic silicon power, containing carbon fine powder, ferrosilicon fine powder premix in ball mill, then mix in wheel roller with the aggregate of respective quality umber, the yellow starch gum or resin and the suitable quantity of water that finally add respective quality umber, make pug, with friction press, make base substrate, base substrate drying is put into the saggar that graphite is housed and is buried burning, and firing temperature is 1420 ℃～1550 ℃, is incubated and can makes for 5～10 hours.
Silicon carbide articles of the present invention, owing to having added the ferrosilicon fine powder of transition plasticity reacting phase, therefore reduced sintering temperature when sintering, realize high-strength resistance to erosion, owing to adding metallic silicon power and containing carbon fine powder, by the synthetic high-activity nano level silicon carbide of reaction original position, reduce sintering temperature, improved high conduction material content, slightly higher than silicon nitride combined silicon carbide on cost, but well below from silicon carbide, be conducive to the marketing of this product.
Embodiment
Below in conjunction with specific embodiment, the present invention is further described.
Embodiment 1:
Choosing mass fraction is that particle diameter 2.5～1.43mm carborundum aggregate of 30, the particle diameter that mass fraction is 20 are that the particle diameter that 1.43～0.5mm carborundum aggregate, mass fraction are 10 is 0.5～0mm carborundum aggregate; Mass fraction is 10 200 order～320 order carbide fine powder; Mass fraction is 5 metallic silicon power, and mass fraction is 2 containing carbon fine powder, the ferrosilicon fine powder that mass fraction is 0.3; Mass fraction is 3 yellow starch gum; By carbide fine powder, metallic silicon power, containing carbon fine powder, ferrosilicon fine powder premix in ball mill, then mix in wheel roller with the carborundum aggregate of respective quality umber, finally add corresponding yellow starch gum and suitable quantity of water, make pug, with friction press, make base substrate, base substrate drying is put into the saggar that graphite is housed and is buried burning, and firing temperature is 1420 ℃, is incubated and makes for 5 hours.
Embodiment 2:
Choosing mass fraction is that particle diameter 2.5～1.43mm carborundum aggregate of 10, the particle diameter that mass fraction is 55 are that the particle diameter that 1.43～0.5mm carborundum aggregate, mass fraction are 5 is 0.5～0mm carborundum aggregate; Mass fraction is 25 200 order～320 order carbide fine powder; Mass fraction is 1 metallic silicon power, and mass fraction is 5 containing carbon fine powder, the ferrosilicon fine powder that mass fraction is 3; Mass fraction is 4 yellow starch gum; By carbide fine powder, metallic silicon power, containing carbon fine powder, ferrosilicon fine powder premix in ball mill, then mix in wheel roller with the carborundum aggregate of respective quality umber, finally add corresponding yellow starch gum and suitable quantity of water, make pug, with friction press, make base substrate, base substrate drying is put into the saggar that graphite is housed and is buried burning, and firing temperature is 1550 ℃, is incubated and makes for 10 hours.
Embodiment 3:
Choosing mass fraction is that particle diameter 2.5～1.43mm carborundum aggregate of 20, the particle diameter that mass fraction is 30 are that the particle diameter that 1.43～0.5mm carborundum aggregate, mass fraction are 7 is 0.5～0mm carborundum aggregate; Mass fraction is 15 200 order～320 order carbide fine powder; Mass fraction is 3 metallic silicon power, and mass fraction is 3 containing carbon fine powder, the ferrosilicon fine powder that mass fraction is 2; Mass fraction is 3 resin; By carbide fine powder, metallic silicon power, containing carbon fine powder, ferrosilicon fine powder premix in ball mill, then mix in wheel roller with the carborundum aggregate of respective quality umber, finally add corresponding resin and suitable quantity of water, make pug, with friction press, make base substrate, base substrate drying is put into the saggar that graphite is housed and is buried burning, and firing temperature is 1480 ℃, is incubated and makes for 8 hours.
Embodiment 4:
Choosing mass fraction is that particle diameter 2.5～1.43mm carborundum aggregate of 25, the particle diameter that mass fraction is 40 are that the particle diameter that 1.43～0.5mm carborundum aggregate, mass fraction are 10 is 0.5～0mm carborundum aggregate; Mass fraction is 10 200 order～320 order carbide fine powder; Mass fraction is 4 metallic silicon power, and mass fraction is 4 containing carbon fine powder, the ferrosilicon fine powder that mass fraction is 1; Mass fraction is 4 resin; By carbide fine powder, metallic silicon power, containing carbon fine powder, ferrosilicon fine powder premix in ball mill, then mix in wheel roller with the carborundum aggregate of respective quality umber, finally add corresponding resin and suitable quantity of water, make pug, with friction press, make base substrate, base substrate drying is put into the saggar that graphite is housed and is buried burning, and firing temperature is 1520 ℃, is incubated and makes for 7 hours.
Technical scheme of the present invention is not limited to the restriction of above-mentioned specific embodiment, and the technology distortion that every technical scheme according to the present invention is made, within all falling into protection scope of the present invention.
Claims (2)
1. an aluminum electrolyzing cell used silicon carbide articles, is comprised of aggregate, powder, admixture and tackiness agent, it is characterized in that:
Described aggregate comprises that particle diameter is that 2.5～1.43mm carborundum aggregate, particle diameter are that 1.43～0.5mm carborundum aggregate, particle diameter are 0.5～0mm carborundum aggregate;
Described powder is 200 order～320 object carbide fine powder;
Described admixture comprises metallic silicon power, contains carbon fine powder and ferro-silicon alloy powder;
Described tackiness agent is yellow starch gum or resin;
In aggregate, powder, admixture and tackiness agent quality sum,
Particle diameter is that the mass fraction of 2.5～1.43mm carborundum aggregate is that 10～30 parts, particle diameter are that the mass fraction of 1.43～0.5mm carborundum aggregate is that 20～55 parts, particle diameter are that the mass fraction of 0.5～0mm carborundum aggregate is 5～10 parts;
The mass fraction of 200 order～320 object carbide fine powder is 10～25 parts;
The mass fraction of metallic silicon power is 1～5 part, and the mass fraction that contains carbon fine powder is 2～5 parts, and the mass fraction of ferrosilicon fine powder is 0.3～3 part;
The mass fraction of yellow starch gum or resin is 3～4 parts.
2. a preparation method who prepares aluminum electrolyzing cell used silicon carbide articles described in claim 1, it is characterized in that: first according to mass fraction claimed in claim 1 by carbide fine powder, metallic silicon power, containing carbon fine powder, ferrosilicon fine powder premix in ball mill, then mix in wheel roller with the aggregate of respective quality umber, the yellow starch gum or resin and the suitable quantity of water that finally add respective quality umber, make pug, with friction press, make base substrate, base substrate drying is put into the saggar that graphite is housed and is buried burning, firing temperature is 1420 ℃～1550 ℃, be incubated and make after 5～10 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310697959.0A CN103739290A (en) | 2013-12-19 | 2013-12-19 | Silicon carbide product for aluminum electrolysis cell and preparation method thereof |
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| CN201310697959.0A CN103739290A (en) | 2013-12-19 | 2013-12-19 | Silicon carbide product for aluminum electrolysis cell and preparation method thereof |
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| CN103739290A true CN103739290A (en) | 2014-04-23 |
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| CN201310697959.0A Pending CN103739290A (en) | 2013-12-19 | 2013-12-19 | Silicon carbide product for aluminum electrolysis cell and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112341201A (en) * | 2020-11-10 | 2021-02-09 | 宜兴市丁山耐火器材有限公司 | Self-bonding silicon carbide refractory material and preparation method thereof |
| CN114538928A (en) * | 2022-04-25 | 2022-05-27 | 长沙中瓷新材料科技有限公司 | Graphite carbon base sagger |
-
2013
- 2013-12-19 CN CN201310697959.0A patent/CN103739290A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112341201A (en) * | 2020-11-10 | 2021-02-09 | 宜兴市丁山耐火器材有限公司 | Self-bonding silicon carbide refractory material and preparation method thereof |
| CN114538928A (en) * | 2022-04-25 | 2022-05-27 | 长沙中瓷新材料科技有限公司 | Graphite carbon base sagger |
| CN114538928B (en) * | 2022-04-25 | 2022-07-12 | 长沙中瓷新材料科技有限公司 | Graphite carbon-based sagger |
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Application publication date: 20140423 |