CN110015677A - It is a kind of using aluminium chromium slag as electro-corundum of major ingredient and preparation method thereof - Google Patents

It is a kind of using aluminium chromium slag as electro-corundum of major ingredient and preparation method thereof Download PDF

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Publication number
CN110015677A
CN110015677A CN201910411940.2A CN201910411940A CN110015677A CN 110015677 A CN110015677 A CN 110015677A CN 201910411940 A CN201910411940 A CN 201910411940A CN 110015677 A CN110015677 A CN 110015677A
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China
Prior art keywords
chromium slag
aluminium chromium
corundum
electro
major ingredient
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CN201910411940.2A
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Chinese (zh)
Inventor
赵惠忠
赵鹏达
高红军
张寒
宋建义
朱逾倩
曹杨
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JINZHOU JIXIN HIGH-TEMPERATURE MATERIAL Co Ltd
Wuhan University of Science and Engineering WUSE
Wuhan University of Science and Technology WHUST
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JINZHOU JIXIN HIGH-TEMPERATURE MATERIAL Co Ltd
Wuhan University of Science and Engineering WUSE
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Priority to CN201910411940.2A priority Critical patent/CN110015677A/en
Publication of CN110015677A publication Critical patent/CN110015677A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/30—Preparation of aluminium oxide or hydroxide by thermal decomposition or by hydrolysis or oxidation of aluminium compounds
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/38—Preparation of aluminium oxide by thermal reduction of aluminous minerals
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/10—Solid density
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/32—Thermal properties
    • C01P2006/37—Stability against thermal decomposition
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/80—Compositional purity

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The present invention relates to a kind of using aluminium chromium slag as electro-corundum of major ingredient and preparation method thereof.Its technical solution is: be by the chemical component of the electro-corundum of major ingredient of aluminium chromium slag: aluminium chromium slag particle is 65~73wt%；Carbonaceous raw material is 4~8wt%；Commercial alumina fine powder is 8~16wt%；Alumine fine powder is 8~13wt%；Aluminum fluoride fine powder is 1~5wt%.By the chemical component: being first uniformly mixed the aluminium chromium slag particle and the carbonaceous raw material, be added in electric arc furnaces, keep the temperature 3~6 hours under the conditions of 2000~2200 DEG C；The commercial alumina fine powder, the alumine fine powder and the aluminum fluoride fine powder is added into the electric arc furnaces again, then keeps the temperature 4~7 hours under the conditions of 2000~2200 DEG C, natural cooling is made using aluminium chromium slag as the electro-corundum of major ingredient.The present invention has the characteristics that largely to consume aluminium chromium slag, alleviates aluminium chromium slag to environmental hazard, cheap and environmental-friendly, prepared good using aluminium chromium slag as the electro-corundum consistency of major ingredient.

Description

It is a kind of using aluminium chromium slag as electro-corundum of major ingredient and preparation method thereof
Technical field
The invention belongs to the preparation technical fields of electro-corundum.More particularly to a kind of using aluminium chromium slag as the electro-corundum of major ingredient And preparation method thereof.
Background technique
Aluminium chromium slag is by-product derived from thermite reaction metal smelting chromium.Metallic aluminium is utilized in metal smelting chromium Reduction reaction occurs with industrial oxidation chromium and produces crome metal, metallic aluminium powder and Cr2O3Fierce chemistry occurs in the state of melting Reaction, the Al of generation2O3Rapidly to corundum phase transition, at the same with the complete Cr of unreacted2O3Solid solution generates aluminium chromium solid solution, i.e., Aluminium chromium slag.Aluminium chromium slag can cause environmental pollution as solid waste, and Cr VI especially therein can seriously endanger environment And human health；And aluminium chromium slag is directly appended to contain in Cr refractory product and is used, but there are still have pollution to environment Hexavalent chromium compound.
To reduce hexavalent chromium compound content and impurity component in aluminium chromium slag, patent " a kind of pink fused alumina material and its producer The substances such as aluminium chromium slag, petroleum coke are pressed into ball material, are added to electricity after drying by method " (CN103896609A) patented technology, the technology In arc furnace, pink fused alumina material is made, but the above method fails to be completely separated chromium matter element, there are still potential hexavalent chromium polluted danger Evil.To be completely separated chromium matter element, " a kind of electro-corundum material and its production method " (CN104788112A) patented technology, together Sample uses aluminium chromium slag for raw material, and using petroleum coke as the electro-corundum of reducing agent melting in electric arc furnaces, the method is completely with aluminium Chromium slag is primary raw material, and higher CaO is contained in aluminium chromium slag, cannot completely remove in fusion process, deposit in made electro-corundum In higher CaO component, the service performance of its electro-corundum is influenced.
The preparation of electro-corundum is generally using commercial alumina, homogenizing alumina and alumine etc. as silicon source, such as patent " palm fibre The smelting process of corundum " (CN102815731A) and patent " High-density white corundum and its preparation process " (CN102674870A) Deng, but it is gradually nervous due to china natural resources, it is not only at high cost, and largely consume the sustainable development that above-mentioned resource is unfavorable for industry Exhibition.
Summary of the invention
The present invention is directed to overcome prior art defect, and it is an object of the present invention to provide a kind of can largely consume aluminium chromium slag, alleviation aluminium chromium Slag uses this method to environmental hazard, cheap and environmental-friendly using aluminium chromium slag as the preparation method of the electro-corundum of major ingredient What is prepared is good as the electro-corundum consistency of major ingredient using aluminium chromium slag.
To achieve the above object, the technical scheme adopted by the invention is that:
Described to be by the chemical component of the electro-corundum of major ingredient of aluminium chromium slag: aluminium chromium slag particle is 65~73wt%；Carbonaceous Raw material is 4~8wt%；Commercial alumina fine powder is 8~16wt%；Alumine fine powder is 8~13wt%；Aluminum fluoride fine powder is 1~5wt%.
By described using aluminium chromium slag as the chemical component of the electro-corundum of major ingredient: first by the aluminium chromium slag particle and the carbonaceous Raw material is uniformly mixed, and obtains mixture；The mixture is added in electric arc furnaces, 3~6 are kept the temperature under the conditions of 2000~2200 DEG C Hour；The commercial alumina fine powder, the alumine fine powder and the aluminum fluoride fine powder is added into the electric arc furnaces again, Then 4~7 hours are kept the temperature under the conditions of 2000~2200 DEG C, cooled to room temperature is made using aluminium chromium slag as the electric smelting of major ingredient Corundum.
The aluminium chromium slag particle is the clinker that metal smelting chromium generates；The chemical component of the aluminium chromium slag particle is: Al2O3 For 75~85wt%, Cr2O3For 8~15wt%, CaO≤3wt%, Fe2O3≤ 2wt%, MgO≤2wt%；The aluminium chromium slag Partial size≤5mm.
The carbonaceous raw material is one or more of coke, carbon black and graphite；The C content of the carbonaceous raw material >= 75wt%.
Al in the alumine fine powder2O3Content > 60wt%.
Due to the adoption of the above technical scheme, the present invention has following good effect compared with prior art:
1, the present invention smelts the by-product to be formed using crome metal as raw material, on the one hand can reduce cost of material, saving has Resource is limited, while can largely consume crome metal and smelt the solid waste generated, realizes the resource utilization of aluminium chromium slag, thus it is used Low in raw material price；The raw material that the present invention uses is not necessarily to special production equipment and processing means, saves human resources, technique Process is simple.
2, the present invention realizes chromium in aluminium chromium slag using chromium oxide and crome metal with the carburizing reagent occurred between carbonaceous element The rejecting of matter component, thoroughly solve the problems, such as it is hexavalent chromium polluted in aluminium chromium slag, it is environmental-friendly.
3, prepared by the present invention to have significant difference with conventional electro-corundum using aluminium chromium slag as the electro-corundum of major ingredient, it leads Wanting object mutually is corundum phase and calcium hexaluminate phase.It is prepared using aluminium chromium slag as the electro-corundum of major ingredient after measured: Al2O3Content For 90~98wt%；Bulk density is 3.30~3.70gcm3；Refractoriness is greater than 1790 DEG C.The consistency of product is good.
Therefore, the present invention is friendly to environmental hazard, cheap and environment with can largely consume aluminium chromium slag, alleviation aluminium chromium slag Good feature, it is prepared good using aluminium chromium slag as the electro-corundum consistency of major ingredient.
Specific embodiment
The invention will be further described With reference to embodiment, not to the limitation of its protection scope.
It is first that raw material Unify legislation involved in present embodiment is as follows to avoid repeating, it is no longer superfluous in embodiment It states:
The aluminium chromium slag particle is the clinker that metal smelting chromium generates；The chemical component of the aluminium chromium slag particle is: Al2O3 For 75~85wt%, Cr2O3For 8~15wt%, CaO≤3wt%, Fe2O3≤ 2wt%, MgO≤2wt%；The aluminium chromium slag Partial size≤5mm.
Al in the alumine fine powder2O3Content > 60wt%.
The carbonaceous raw material is one or more of coke, carbon black and graphite；The C content of the carbonaceous raw material >= 75wt%.
Embodiment 1
It is a kind of using aluminium chromium slag as electro-corundum of major ingredient and preparation method thereof.It is described using aluminium chromium slag as the electro-corundum of major ingredient Chemical component be: aluminium chromium slag particle be 65~67wt%；Carbonaceous raw material is 4~5wt%；Commercial alumina fine powder be 14~ 16wt%；Alumine fine powder is 11~13wt%；Aluminum fluoride fine powder is 4~5wt%.
By described using aluminium chromium slag as the chemical component of the electro-corundum of major ingredient: first by the aluminium chromium slag particle and the carbonaceous Raw material is uniformly mixed, and obtains mixture；The mixture is added in electric arc furnaces, 3~6 are kept the temperature under the conditions of 2000~2100 DEG C Hour；The commercial alumina fine powder, the alumine fine powder and the aluminum fluoride fine powder is added into the electric arc furnaces again, Then 4~7 hours are kept the temperature under the conditions of 2000~2100 DEG C, cooled to room temperature is made using aluminium chromium slag as the electric smelting of major ingredient Corundum.
It is manufactured in the present embodiment using aluminium chromium slag as the electro-corundum of major ingredient after measured: Al2O3Content be 94.3~ 98.0wt%；Bulk density is 3.54~3.70gcm3；Refractoriness is greater than 1790 DEG C.
Embodiment 2
It is a kind of using aluminium chromium slag as electro-corundum of major ingredient and preparation method thereof.It is described using aluminium chromium slag as the electro-corundum of major ingredient Chemical component be: aluminium chromium slag particle be 67~69wt%；Carbonaceous raw material is 5~6wt%；Commercial alumina fine powder be 12~ 14wt%；Alumine fine powder is 10~12wt%；Aluminum fluoride fine powder is 3~4wt%.
It is described to be by the preparation method of the electro-corundum of major ingredient of aluminium chromium slag: first by the aluminium chromium slag particle and the carbonaceous Raw material is uniformly mixed, and obtains mixture；The mixture is added in electric arc furnaces, 3~6 are kept the temperature under the conditions of 2040~2140 DEG C Hour；The commercial alumina fine powder, the alumine fine powder and the aluminum fluoride fine powder is added into the electric arc furnaces again, Then 4~7 hours are kept the temperature under the conditions of 2040~2140 DEG C, cooled to room temperature is made using aluminium chromium slag as the electric smelting of major ingredient Corundum.
It is manufactured in the present embodiment using aluminium chromium slag as the electro-corundum of major ingredient after measured: Al2O3Content be 92.3~ 96.7wt%；Bulk density is 3.42~3.68gcm3；Refractoriness is greater than 1790 DEG C.
Embodiment 3
It is a kind of using aluminium chromium slag as electro-corundum of major ingredient and preparation method thereof.It is described using aluminium chromium slag as the electro-corundum of major ingredient Chemical component be: aluminium chromium slag particle be 69~71wt%；Carbonaceous raw material is 6~7wt%；Commercial alumina fine powder be 10~ 12wt%；Alumine fine powder is 9~11wt%；Aluminum fluoride fine powder is 2~3wt%.
By described using aluminium chromium slag as the chemical component of the electro-corundum of major ingredient: first by the aluminium chromium slag particle and the carbonaceous Raw material is uniformly mixed, and obtains mixture；The mixture is added in electric arc furnaces, 3~6 are kept the temperature under the conditions of 2070~2170 DEG C Hour；The commercial alumina fine powder, the alumine fine powder and the aluminum fluoride fine powder is added into the electric arc furnaces again, Then 4~7 hours are kept the temperature under the conditions of 2070~2170 DEG C, cooled to room temperature is made using aluminium chromium slag as the electric smelting of major ingredient Corundum.
It is manufactured in the present embodiment using aluminium chromium slag as the electro-corundum of major ingredient after measured: Al2O3Content be 91.5~ 95.4wt%；Bulk density is 3.38~3.59gcm3；Refractoriness is greater than 1790 DEG C.
Embodiment 4
It is a kind of using aluminium chromium slag as electro-corundum of major ingredient and preparation method thereof.It is described using aluminium chromium slag as the electro-corundum of major ingredient Chemical component be: aluminium chromium slag particle be 71~73wt%；Carbonaceous raw material is 7~8wt%；Commercial alumina fine powder be 8~ 10wt%；Alumine fine powder is 8~10wt%；Aluminum fluoride fine powder is 1~2wt%.
By described using aluminium chromium slag as the chemical component of the electro-corundum of major ingredient: first by the aluminium chromium slag particle and the carbonaceous Raw material is uniformly mixed, and obtains mixture；The mixture is added in electric arc furnaces, 3~6 are kept the temperature under the conditions of 2100~2200 DEG C Hour；The commercial alumina fine powder, the alumine fine powder and the aluminum fluoride fine powder is added into the electric arc furnaces again, Then 4~7 hours are kept the temperature under the conditions of 2100~2200 DEG C, cooled to room temperature is made using aluminium chromium slag as the electric smelting of major ingredient Corundum.
It is manufactured in the present embodiment using aluminium chromium slag as the electro-corundum of major ingredient after measured: Al2O3Content be 90.0~ 93.3wt%；Bulk density is 3.30~3.46gcm3；Refractoriness is greater than 1790 DEG C.
Present embodiment has following good effect compared with prior art:
1, present embodiment smelts the by-product to be formed using crome metal as raw material, on the one hand can reduce raw material at This, saves limited resources, while can largely consume crome metal and smelt the solid waste generated, realizes the recycling benefit of aluminium chromium slag With, therefore it is raw materials used cheap；The raw material that present embodiment uses is not necessarily to special production equipment and processing means, section Human resources are saved, process flow is simple.
2, present embodiment realizes aluminium using chromium oxide and crome metal with the carburizing reagent occurred between carbonaceous element The rejecting of chromium matter component in chromium slag, thoroughly solve the problems, such as it is hexavalent chromium polluted in aluminium chromium slag, it is environmental-friendly.
3, the electro-corundum of present embodiment preparation has significant difference with conventional electro-corundum, and main object is mutually rigid Beautiful phase and calcium hexaluminate phase.It is prepared using aluminium chromium slag as the electro-corundum of major ingredient after measured: Al2O3Content be 90~ 98wt%；Bulk density is 3.30~3.70gcm3；Refractoriness is greater than 1790 DEG C.The consistency of product is good.
Therefore, present embodiment, which has, can largely consume aluminium chromium slag, alleviate aluminium chromium slag to environmental hazard, cheap It is prepared good using aluminium chromium slag as the electro-corundum consistency of major ingredient with environmental-friendly feature.

Claims (5)

1. a kind of using aluminium chromium slag as the preparation method of the electro-corundum of major ingredient, it is characterised in that described using aluminium chromium slag as the electricity of major ingredient The chemical component of molten corundum is: aluminium chromium slag particle is 65~73wt%, and carbonaceous raw material is 4~8wt%, and commercial alumina fine powder is 8~16wt%, alumine fine powder are 8~13wt%, and aluminum fluoride fine powder is 1~5wt%；
By described using aluminium chromium slag as the chemical component of the electro-corundum of major ingredient: first by the aluminium chromium slag particle and the carbonaceous raw material It is uniformly mixed, obtains mixture；The mixture is added in electric arc furnaces, it is small that 3~6 are kept the temperature under the conditions of 2000~2200 DEG C When；The commercial alumina fine powder, the alumine fine powder and the aluminum fluoride fine powder is added into the electric arc furnaces again, so 4~7 hours are kept the temperature under the conditions of 2000~2200 DEG C afterwards, cooled to room temperature is made rigid as the electric smelting of major ingredient using aluminium chromium slag It is beautiful.
2. according to claim 1 using aluminium chromium slag as the preparation method of the electro-corundum of major ingredient, it is characterised in that the aluminium Chromium slag particle is the clinker that metal smelting chromium generates；The chemical component of the aluminium chromium slag particle is: Al2O3For 75~85wt%, Cr2O3For 8~15wt%, CaO≤3wt%, Fe2O3≤ 2wt%, MgO≤2wt%；Partial size≤5mm of the aluminium chromium slag.
3. according to claim 1 using aluminium chromium slag as the preparation method of the electro-corundum of major ingredient, it is characterised in that the charcoal Matter raw material is one or more of coke, carbon black and graphite；C content >=75wt% of the carbonaceous raw material.
4. according to claim 1 using aluminium chromium slag as the preparation method of the electro-corundum of major ingredient, it is characterised in that the height Al in bauxite fine powder2O3Content > 60wt%.
5. a kind of using aluminium chromium slag as the electro-corundum of major ingredient, it is characterised in that described by the electro-corundum of major ingredient of aluminium chromium slag is root According to described in any one of Claims 1 to 4 item using aluminium chromium slag as prepared by the preparation method of the electro-corundum of major ingredient with aluminium chromium Slag is the electro-corundum of major ingredient.
CN201910411940.2A 2019-05-17 2019-05-17 It is a kind of using aluminium chromium slag as electro-corundum of major ingredient and preparation method thereof Pending CN110015677A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1315306A (en) * 2000-03-30 2001-10-03 赵文厚 Refractory Al-Cr-C material
CN1341574A (en) * 2000-09-06 2002-03-27 冶金工业部洛阳耐火材料研究院 Chrome diamond spar product
CN103896609A (en) * 2014-03-08 2014-07-02 锦州集信高温材料有限公司 Chromium corundum material and production method thereof
CN105568004A (en) * 2016-03-03 2016-05-11 锦州集信高温材料有限公司 Method for smelting chromium metal from aluminum-chromium slag in electric arc furnace
CN108484184A (en) * 2018-04-11 2018-09-04 武汉科技大学 A kind of corundum-calcium hexaluminate and preparation method thereof based on aluminium chromium slag

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1315306A (en) * 2000-03-30 2001-10-03 赵文厚 Refractory Al-Cr-C material
CN1341574A (en) * 2000-09-06 2002-03-27 冶金工业部洛阳耐火材料研究院 Chrome diamond spar product
CN103896609A (en) * 2014-03-08 2014-07-02 锦州集信高温材料有限公司 Chromium corundum material and production method thereof
CN105568004A (en) * 2016-03-03 2016-05-11 锦州集信高温材料有限公司 Method for smelting chromium metal from aluminum-chromium slag in electric arc furnace
CN108484184A (en) * 2018-04-11 2018-09-04 武汉科技大学 A kind of corundum-calcium hexaluminate and preparation method thereof based on aluminium chromium slag

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