CN112125683A - Anti-scouring semi-graphite crucible carbon brick and preparation method thereof - Google Patents
Anti-scouring semi-graphite crucible carbon brick and preparation method thereof Download PDFInfo
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Abstract
The invention provides an anti-scouring semi-graphite crucible carbon brick which is composed of the following raw materials in parts by weight: 30-40% of electrically calcined anthracite, 20-30% of high-purity silicon carbide, 10-15% of high-temperature asphalt, 5-8% of anthracene oil, 15-25% of silicon carbide flake graphite and 20-40% of mullite powder, wherein the resistivity of the electrically calcined anthracite is less than 450 omega, the granularity is 3mm-6mm, the fineness of the high-purity silicon carbide is not less than 200 meshes, the fineness of the silicon carbide flake graphite is not less than 200 meshes, and the fineness of the mullite powder is not less than 200 meshes.
Description
Technical Field
The invention relates to the technical field of carbon product preparation, in particular to an anti-scouring semi-graphite crucible carbon brick and a preparation method thereof.
Background
The carbon brick performance determines the service life of a furnace body and a furnace hearth, the anthracite, silicon carbide and the like are also adopted in the preparation of the existing carbon brick, but the physicochemical indexes of the carbon brick are not up to the standard due to unreasonable proportion or unreasonable preparation method, so that the service life of the furnace body is shortened after the carbon brick is suitable for the furnace body.
Disclosure of Invention
It is necessary to provide an anti-scouring semi-graphite crucible carbon brick and a preparation method thereof.
An anti-scouring semi-graphite crucible carbon brick is composed of the following raw materials in parts by weight: 30-40% of electrically calcined anthracite, 20-30% of high-purity silicon carbide, 10-15% of high-temperature asphalt, 5-8% of anthracene oil, 15-25% of silicon carbide flake graphite and 20-40% of mullite powder, wherein the resistivity of the electrically calcined anthracite is less than 450 omega, the granularity is 3mm-6mm, the fineness of the high-purity silicon carbide is not less than 200 meshes, the fineness of the silicon carbide flake graphite is not less than 200 meshes, and the fineness of the mullite powder is not less than 200 meshes.
A preparation method of an anti-scouring semi-graphite crucible carbon brick comprises the following steps:
firstly, respectively crushing electrically calcined anthracite into aggregates with the size of 3-6 mm by using a crusher;
grinding high-purity silicon carbide, silicon carbide flake graphite and mullite powder by using a Raymond mill to ensure that the fineness of the powder is not less than 200 meshes;
feeding the aggregate and the powder into a mixer to be mixed uniformly in advance;
feeding the mixture, high-temperature asphalt and anthracene oil into a kneading machine for uniformly mixing;
molding to form the carbon brick by adopting a 3150KIV-1200KIV hydraulic brick press type;
after the carbon brick blank is formed, the carbon brick blank is naturally shaped, and can be directly put into a roasting furnace for roasting after 2 to 3 hours without water cooling.
Furthermore, the ash content of the carbon brick is less than 5 percent, the silicon content is 8 to 12 percent, and the density is 1.56 to 1.6g/cm3Resistivity less than 60, normal temperature compression strength 39mpa load softening 2500 degrees, flexural strength 7.8, thermal conductivity 23.69.
The product is mainly used in iron water tanks, slag melting tanks, aluminum electrolysis tanks and steel high-aluminum iron water tanks of smelting submerged arc furnaces, and is built in cylindrical fan-shaped tanks, square tanks, rectangular tanks and turnover ladles for use.
The innovation points are as follows: the product is an anti-scouring high-temperature-resistant carbon brick refractory material, and is different from the existing molten iron bath in that (the existing molten iron bath is built by refractory bricks, the softening temperature of the refractory bricks is lower than 1700 ℃, and the refractoriness under load of the product is about 2400 ℃), the product has more or less influence on the quality of the product when the common molten iron bath is used, and the product is a carbonaceous material and cannot influence the indexes of smelting products;
secondly, the product adopts high-quality silicon carbide and mullite which belong to refractory materials with high temperature resistance, scouring resistance, thermal stability and high strength, the product has small production specification through special customized forming equipment, the capacity of replacing carbon bricks in an iron water tank can be replaced, and damaged parts can be replaced, and the sector iron water tank is formed by small building and multilateral building, so that the product has good scouring resistance and is not easy to oxidize (the carbonaceous refractory material and the refractory bricks which are formed by the molten iron of the smelting furnace passing through the temperature of 1400 ℃ plus 2000 ℃ are products which are easy to oxidize by oxygen at high temperature, and the product uses high-quality raw materials and can prolong the service life when not used, the common refractory material can be used for 20-25 times at most, and the product can be used for 45-50 times continuously);
the product produced by the customized forming equipment has small specification and large volume, and overcomes the defects of the original production method and equipment process, because the specification is small, when the molten iron crucible is built, the product can be closely combined with the crucible body and no gap is left at the rear part (the large-size product has small volume when built and the gap is most easily left at the rear part of the polygonal crucible, so that the product is easy to drop and replace when in use, and the cost is high).
Detailed Description
The embodiment of the invention provides an anti-scouring semi-graphite crucible carbon brick which is prepared from the following raw materials in parts by weight: 30-40% of electrically calcined anthracite, 20-30% of high-purity silicon carbide, 10-15% of high-temperature asphalt, 5-8% of anthracene oil, 15-25% of silicon carbide flake graphite and 20-40% of mullite powder, wherein the resistivity of the electrically calcined anthracite is less than 450 omega, the granularity is 3mm-6mm, the fineness of the high-purity silicon carbide is not less than 200 meshes, the fineness of the silicon carbide flake graphite is not less than 200 meshes, and the fineness of the mullite powder is not less than 200 meshes.
A preparation method of an anti-scouring semi-graphite crucible carbon brick comprises the following steps:
firstly, respectively crushing electrically calcined anthracite into aggregates with the size of 3-6 mm by using a crusher;
grinding high-purity silicon carbide, silicon carbide flake graphite and mullite powder by using a Raymond mill to ensure that the fineness of the powder is not less than 200 meshes;
feeding the aggregate and the powder into a mixer to be mixed uniformly in advance;
feeding the mixture, high-temperature asphalt and anthracene oil into a kneading machine for uniformly mixing;
molding to form the carbon brick by adopting a 3150KIV-1200KIV hydraulic brick press type;
after the carbon brick blank is formed, the carbon brick blank is naturally shaped, and can be directly put into a roasting furnace for roasting after 2 to 3 hours without water cooling.
Furthermore, the ash content of the carbon brick is less than 5 percent, the silicon content is 8 to 12 percent, and the density is 1.56 to 1.6g/cm3Resistivity less than 60, normal temperature compressive strength of 39mpa, refractoriness under load of 2500 degrees, flexural strength of 7.8 and thermal conductivity of 23.69.
The modules or units in the device of the embodiment of the invention can be combined, divided and deleted according to actual needs.
The above disclosure is only illustrative of the preferred embodiments of the present invention, which should not be taken as limiting the scope of the invention, but rather the invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It will be understood by those skilled in the art that all or a portion of the above-described embodiments may be practiced and equivalents thereof may be resorted to as falling within the scope of the invention as claimed. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may include only a single embodiment, and such description is for clarity only, and those skilled in the art will be able to make the description as a whole, and the embodiments may be suitably combined to form other embodiments as will be apparent to those skilled in the art.
Claims (3)
1. An anti-scouring semi-graphite crucible carbon brick is characterized by comprising the following raw materials in parts by weight: 30-40% of electrically calcined anthracite, 20-30% of high-purity silicon carbide, 10-15% of high-temperature asphalt, 5-8% of anthracene oil, 15-25% of silicon carbide flake graphite and 20-40% of mullite powder, wherein the resistivity of the electrically calcined anthracite is less than 450 omega, the granularity is 3mm-6mm, the fineness of the high-purity silicon carbide is not less than 200 meshes, the fineness of the silicon carbide flake graphite is not less than 200 meshes, and the fineness of the mullite powder is not less than 200 meshes.
2. A preparation method of an anti-scouring semi-graphite crucible carbon brick is characterized by comprising the following steps:
firstly, respectively crushing electrically calcined anthracite into aggregates with the size of 3-6 mm by using a crusher;
grinding high-purity silicon carbide, silicon carbide flake graphite and mullite powder by using a Raymond mill to ensure that the fineness of the powder is not less than 200 meshes;
feeding the aggregate and the powder into a mixer to be mixed uniformly in advance;
feeding the mixture, high-temperature asphalt and anthracene oil into a kneading machine for uniformly mixing;
molding to form the carbon brick by adopting a 3150KIV-1200KIV hydraulic brick press type;
after the carbon brick blank is formed, the carbon brick blank is naturally shaped, and can be directly put into a roasting furnace for roasting after 2 to 3 hours without water cooling.
3. An erosion resistant semi-graphitic crucible carbon brick according to claim 1, wherein: the ash content of the carbon brick is less than 5 percent, the silicon content is 8 to 12 percent, and the bulk density is 1.56 to 1.6g/cm3Resistivity less than 60, normal temperature compressive strength of 39mpa, refractoriness under load of 2500 degrees, flexural strength of 7.8 and thermal conductivity of 23.69.
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| CN202010968837.0A CN112125683A (en) | 2020-09-15 | 2020-09-15 | Anti-scouring semi-graphite crucible carbon brick and preparation method thereof |
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| CN202010968837.0A CN112125683A (en) | 2020-09-15 | 2020-09-15 | Anti-scouring semi-graphite crucible carbon brick and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102617176A (en) * | 2012-04-17 | 2012-08-01 | 磐石市昌隆冶金材料有限公司 | Graphite silicon carbon brick |
| CN103833363A (en) * | 2014-01-15 | 2014-06-04 | 北京科技大学 | Silicon carbide graphite composite material and preparation method thereof |
| CN103979981A (en) * | 2014-05-13 | 2014-08-13 | 宁夏文顺新型炭材制品有限公司 | A large-size semi-graphite silicon carbide carbon brick and a production process thereof |
| CN108002854A (en) * | 2017-12-05 | 2018-05-08 | 武汉科技大学 | A kind of high heat conduction high resistance to corrosion electric forging coal base brick fuel and preparation method thereof |
-
2020
- 2020-09-15 CN CN202010968837.0A patent/CN112125683A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102617176A (en) * | 2012-04-17 | 2012-08-01 | 磐石市昌隆冶金材料有限公司 | Graphite silicon carbon brick |
| CN103833363A (en) * | 2014-01-15 | 2014-06-04 | 北京科技大学 | Silicon carbide graphite composite material and preparation method thereof |
| CN103979981A (en) * | 2014-05-13 | 2014-08-13 | 宁夏文顺新型炭材制品有限公司 | A large-size semi-graphite silicon carbide carbon brick and a production process thereof |
| CN108002854A (en) * | 2017-12-05 | 2018-05-08 | 武汉科技大学 | A kind of high heat conduction high resistance to corrosion electric forging coal base brick fuel and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 潘立慧等: "《炼焦新技术》", 28 February 2006, 冶金工业出版社 * |
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Application publication date: 20201225 |