CN105461319A - Refractory material prepared from recovered material - Google Patents
Refractory material prepared from recovered material Download PDFInfo
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- CN105461319A CN105461319A CN201410411780.9A CN201410411780A CN105461319A CN 105461319 A CN105461319 A CN 105461319A CN 201410411780 A CN201410411780 A CN 201410411780A CN 105461319 A CN105461319 A CN 105461319A
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- reclaimed materials
- materials
- refractory
- alumina
- aluminum oxide
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Abstract
The invention relates to a refractory material prepared from a recovered material. The refractory material is characterized in that the refractory material includes alumina adopting alumina, brown corundum and sub-white corundum as a carrier, silicon carbide and graphite, the recovered material obtained after crushing waste lining or internal container powder and removing impurities is used to partially substitute alumina, brown corundum and sub-white corundum new materials, the addition amount of the recovered material, calculated by alumina contained in the recovered material, is 35% or less of the content of total alumina in the refractory material, the particle size of the recovered material is 1-5mm, and the water content of the recovered material is not greater than 1%. A technical problem that how to use the recovered material to substitute parts of the new materials and keep the original furnace life is solved in the invention.
Description
Technical field
The present invention relates to refractory materials and complete processing field thereof, particularly relate to a kind of refractory materials using reclaimed materials to make.
Background technology
For realizing the sublimate, advanced and reduce costs of steel-making, steel mill adopts hot metal pretreatment
Method, before stove steel stove delivered to by blast furnace, carry out the pre-treatment such as desiliconization, dephosphorization and desulfurization by molten iron, the inner lining refractory of the container (as metal mixer car, hot metal ladle, fish torpedo ladle) that pre-treatment uses must consider the erosion caused by above-mentioned pre-treatment.Aluminium, silicon carbide. the green brick of carbon refractories manufacture is a kind of excellent refractory materials with its good chemical resistance of concrete, heat-shock resistance, resistance to mechanical erosion and wear resistance, leck brick used and mullite brick before which replacing, it is specially primarily of the A1203(accounting for weight percent about 60-75% and consolidates soil, canopy I pressure, sub-white corundum).The silicon carbide of about 5-20%, the graphite of about 6-18% and a small amount of bonding agent through stir mixing become pug, finally by the thermal treatment of about 200 DEG C temperature, make its solidifying and setting become brick.This aluminium. silicon carbide. carbon refractories is in use owing to being subject to the melting loss of the molten iron of high temperature for a long time, and the chemical erosion of mechanical erosion and slag, has certain work-ing life, is also so-called furnace life.After arriving furnace life, processing vessel needs repairing, and the old liner under removing goes out of use, and if things go on like this, pile up like a mountain for these discarded refractory materialss, both took up an area, and can produce environmental pollution again, becomes the large burden of iron and steel enterprise one.On the other hand refractory factory be cost of material again, and production cost raises up, contrary product sale price pressed down again whereabouts because disturbing.Discarded aluminium can be utilized. silicon carbide. carbon brick carrys out the problem that alternative a part of virgin material has become a need solution to be studied.
Summary of the invention
The invention provides a kind of refractory materials using reclaimed materials to make, solve and how to utilize discarded reclaimed materials to carry out Substitute For Partial virgin material, and keep the technical problem in original work-ing life.
The technical scheme solved the problem is:
A kind of refractory materials using reclaimed materials to make, aluminum oxide, silicon carbide and graphite that to comprise with alumina, Brown Alundum, white sub-corundum be carrier, it is characterized in that: use and pulverize reclaimed materials Some substitute alumina, Brown Alundum and Bai Ya corundum virgin material after impurity elimination by the furnace lining discarded or interior gallbladder channel, the add-on of reclaimed materials with the aluminum oxide contained by it calculate account for this refractory materials total oxidation aluminium content≤35%, the granular size of this reclaimed materials between 1-5mm, water ratio≤1%.
It is characterized in that: this reclaimed materials should remove the impurity of iron content.
It is characterized in that: when this aluminum oxide virgin material take Brown Alundum as main body, the add-on of this reclaimed materials is 20-30%.
It is characterized in that: this aluminum oxide virgin material is with the high grade bauxite containing 75-85% aluminum oxide for time main, and the add-on of this reclaimed materials is 25-35%.
It is characterized in that: the alumina supporter of this virgin material and reclaimed materials composition, the weight percent of its granular size is:
5～lmm40～60%：
1～0.3mm20～35%：
0.3mm5～15%：
<0.05mm3～10%。
Advantage of the present invention is:
1, owing to decreasing the input of aluminum oxide virgin material, employ part and pulverize by laying-in in discarding the reclaimed materials that de-iron and other impurity screens, reduce the expense of refractory materials, thus for reducing ironmaking, the cost of steel makes contributions.
2, its work-ing life with all uses compared with virgin material, not only not reduction, also slightly improve, particularly all there is prolongation the interim turnaround.
3, make the refractory materials discarded obtain the approach re-used, saved mine resources, be conducive to soil-water protection.
4, solve the difficult problem that steel-making enterprise rejected material is stacked, eliminate a large amount of stacking places, what turn eliminate that environmental pollution brings is many because of border.
Embodiment
Following examples are that the present invention goes out to set forth further.
The present invention removes by existing aluminium. silicon carbide. and carbon refractories manufacturing technology prepares new aluminum oxide (A1
20
3), outside silicon carbide and graphite raw material, also should by inner lining refractory discarded for molten steel pretreatmenting container first with pulverizer or manually pulverize; And by impurity wherein, the composition being particularly stained with irony is removed, and the method for removal is pickling and washing, and manually picks up or magnetic; Carry out that drying (usually under temperature is 100 DEG C of conditions), to water ratio≤1%, finally presses particle 5 ~ lmm, 1 ~ 0.3mm, 1-0.5mm, 0.3mm and <0.05mm size fractionation is for subsequent use as reclaimed materials again, as basis in time preparing burden.In above-mentioned novel material, the carrying agent as aluminum oxide is normally used is the high grade bauxite containing 75-85% aluminum oxide, the Brown Alundum containing about 90% aluminum oxide and the sub-white corundum containing about 90% aluminum oxide, and graphite uses crystalline flake graphite to be master as the carrier of carbon.
Refractory materials of the present invention by the weight percent of its chemical composition is like the prior art: aluminum oxide accounts for 60-75%, silicon carbide accounts for 5-20%, carbon accounts for 6-18%, other is a small amount of bonding agent and additive, special asphalt solid binder, resol etc. that the producer gas generator semi coking tar that the utilization as present common use is discarded is made for raw material: specifically determined by the position of refractory materials in stove or in molten iron or ladle.
Partially recycled material is substituted new alumina raw material by the present invention, and its add-on calculates with the whole alumina content of alumina content≤30% refractory materials had in reclaimed materials.Specifically depending on the virgin material carrier main species of refractory materials of the present invention for the position in various molten steel pretreatmenting container and aluminum oxide, generally be positioned at the refractory materials at container slag line place, because the normal phase is immersed in molten slag and molten iron, the chemical erosion standing slag long-term is easily damaged, and its reclaimed materials consumption can suitably reduce; For iron wire brick then reclaimed materials consumption can suitably increase.When aluminum oxide virgin material with Brown Alundum for time main, the 10-20% that reclaimed materials add-on accounts for whole alumina content is advisable, when virgin material with high grade bauxite for time main, the 25-35% that reclaimed materials add-on accounts for whole plumbous oxide content is advisable.
After the present invention adds reclaimed materials in aluminum oxide virgin material, its granular size should be kept to have suitable proportioning:
5～lmm40～60%：
1～0.3mm20～35%：
0.3mm5～15%：
<0.05mm3～10%。
Above-mentioned aluminum oxide virgin material, reclaimed materials are spouted into the mixing uniformly plastic pug of stirrer together with silicon carbide, carbon and bonding agent after weighing, under the temperature condition of 200 DEG C, thermofixation process is carried out after this mud material forming, just obtain and have the refractory materials that should have intensity, its work-ing life is not second to all using the refractory materials of virgin material.
Claims (5)
1. the refractory materials using reclaimed materials to make, it is characterized in that: aluminum oxide, silicon carbide and graphite that to comprise with alumina, Brown Alundum, white sub-corundum be carrier, it is characterized in that: use and pulverize reclaimed materials Some substitute alumina, Brown Alundum and Bai Ya corundum virgin material after impurity elimination by the furnace lining discarded or interior gallbladder channel, the add-on of reclaimed materials with the aluminum oxide contained by it calculate account for this refractory materials total oxidation aluminium content≤35%, the granular size of this reclaimed materials between 1-5mm, water ratio≤1%.
2. the refractory materials made of use reclaimed materials according to claim 1, is characterized in that: this reclaimed materials should remove the impurity of iron content.
3. the refractory materials that the use reclaimed materials according to claim l is made, is characterized in that: when this aluminum oxide virgin material take Brown Alundum as main body, and the add-on of this reclaimed materials is 20-30%.
4. the refractory materials made of use reclaimed materials according to claim 1, is characterized in that: this aluminum oxide virgin material is with the high grade bauxite containing 75-85% aluminum oxide for time main, and the add-on of this reclaimed materials is 25-35%.
5. the refractory materials made of use reclaimed materials according to claim 1, is characterized in that: the alumina supporter of this virgin material and reclaimed materials composition, and the weight percent of its granular size is:
5～lmm40～60%：
1～0.3mm20～35%：
0.3mm5～15%：
<0.05mm3～10%。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410411780.9A CN105461319A (en) | 2014-08-21 | 2014-08-21 | Refractory material prepared from recovered material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410411780.9A CN105461319A (en) | 2014-08-21 | 2014-08-21 | Refractory material prepared from recovered material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105461319A true CN105461319A (en) | 2016-04-06 |
Family
ID=55599543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410411780.9A Pending CN105461319A (en) | 2014-08-21 | 2014-08-21 | Refractory material prepared from recovered material |
Country Status (1)
| Country | Link |
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| CN (1) | CN105461319A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108147766A (en) * | 2017-12-28 | 2018-06-12 | 定远县明友墙体材料有限责任公司 | A kind of method that paper mill sludge prepares octal brick |
| CN109400122A (en) * | 2017-08-18 | 2019-03-01 | 陈圣义 | Aluminium slag ash recycling is regenerated as method of fused alumina and products thereof and application |
| WO2019080410A1 (en) * | 2017-10-26 | 2019-05-02 | 深圳市铂科新材料股份有限公司 | Method for treating smelting furnace slag |
-
2014
- 2014-08-21 CN CN201410411780.9A patent/CN105461319A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109400122A (en) * | 2017-08-18 | 2019-03-01 | 陈圣义 | Aluminium slag ash recycling is regenerated as method of fused alumina and products thereof and application |
| WO2019080410A1 (en) * | 2017-10-26 | 2019-05-02 | 深圳市铂科新材料股份有限公司 | Method for treating smelting furnace slag |
| CN108147766A (en) * | 2017-12-28 | 2018-06-12 | 定远县明友墙体材料有限责任公司 | A kind of method that paper mill sludge prepares octal brick |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160406 |
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| WD01 | Invention patent application deemed withdrawn after publication |