CN105503211A - Prefabricated part for flue wall of carbon baking furnace and preparation method of prefabricated part - Google Patents
Prefabricated part for flue wall of carbon baking furnace and preparation method of prefabricated part Download PDFInfo
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- CN105503211A CN105503211A CN201510962114.9A CN201510962114A CN105503211A CN 105503211 A CN105503211 A CN 105503211A CN 201510962114 A CN201510962114 A CN 201510962114A CN 105503211 A CN105503211 A CN 105503211A
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- fine powder
- channel wall
- roasting furnace
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3286—Gallium oxides, gallates, indium oxides, indates, thallium oxides, thallates or oxide forming salts thereof, e.g. zinc gallate
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention relates to a prefabricated part for a flue wall of a carbon baking furnace and a preparation method of the prefabricated part. According to the technical scheme, 60-70wt% of high-purity magnesia particles, 15-25wt% of high-purity magnesia fine powder, 8-15wt% of electric smelting hercynite fine powder and 2-8wt% of silicon carbide fine powder serve as raw materials, aluminum sol accounting for 6-7wt% of the raw materials is added, the materials are mixed for 5-10 min, casting moulding is carried out, curing is carried out for 18-26 h under natural conditions, and demoulding is carried out; a demoulded green body is placed at 90-110 DEG C to be dried for 18-26 h, and the prefabricated part for the flue wall of the carbon baking furnace is obtained. The prefabricated part for the flue wall of the carbon baking furnace and the preparation method of the prefabricated part have the advantages that energy conservation and environment protection are achieved, and the process is simple; the prepared prefabricated part for the flue wall of the carbon baking furnace is large in heat conductivity coefficient, good in thermal shock stability, high in compactness and good in integrality.
Description
Technical field
The invention belongs to carbon roasting furnace technical field.Be specifically related to a kind of fire channel wall of carbon roasting furnace prefabricated component and preparation method thereof.
Background technology
Carbon roasting furnace be when isolated air by roasting to improve a kind of Thermal Equipment of the performance such as carbon product conduction, heat conduction and intensity.The anode baking temperature general control of carbon roasting furnace is being not less than 1050 DEG C, and in working process, flue wall need stand the high temperature of 1200 ~ 1300 DEG C.Stoving oven needs repeatedly to feed, discharging, causes flue wall by mechanical stress, thermal stresses, carbon corrodes and the periodicity of high temperature acts on, thus occur cracking, distortion and damage.
Current China fire channel wall of carbon roasting furnace refractory materials mainly uses clay brick and high alumina brick.There is the defects such as the high and refractoriness under load of thermal conductivity low and high temperature creep rate is low in clay brick, thus causes the waste of heat energy and the cracking of flue wall and distortion, have impact on the life-span of body of heater.Better, but there is the defect that thermal conductivity is low, thermal shock resistance is poor in the high-temperature creep resistance of high alumina brick and refractoriness under load, thus causes the waste of heat energy and the cracking of flue wall equally, increases operation cost.
" carbon roasting furnace high-temperature material " (CN102659419A) patented technology, by introducing mullite, though the defect such as improve flue wall refractoriness under load low and high temperature creep-resistant property difference and thermal shock resistance is poor, but still there is the low defect of thermal conductivity, and in building process, brickwork joint is many and globality is poor.
" a kind of novel rapid heat conducting furnace wall brick formula and complete processing thereof " (patent CN102126851A) patented technology, by adopting periclasite-Mg-Al-Cr spinel brick, improve the defect that thermal conductivity is low, refractoriness under load is low and high-temperature creep resistance is poor of flue wall, but owing to introducing chromium, to environment, and in building process, brickwork joint is many and globality is poor.
Summary of the invention
The present invention is intended to overcome prior art defect, and object is the preparation method providing a kind of energy-conserving and environment-protective and the simple fire channel wall of carbon roasting furnace prefabricated component of technique; The fire channel wall of carbon roasting furnace prefabricated component thermal conductivity prepared by the method is high, thermal shock resistance is excellent and good integrity.
For achieving the above object, the technical solution adopted in the present invention is: first with the carbide fine powder of the fused hercynite fine powder of the highly-purity magnesite fine powder of the highly-purity magnesite particle of 60 ~ 70wt%, 15 ~ 25wt%, 8 ~ 15wt% and 2 ~ 8wt% for raw material, the Alumina gel of additional described raw material 6 ~ 7wt%, mix 5 ~ 10 minutes, casting, maintenance 18 ~ 26 hours under natural condition, the demoulding; Again the green compact after the demoulding to be placed under 90 ~ 110 DEG C of conditions dry 18 ~ 26 hours, to obtain fire channel wall of carbon roasting furnace prefabricated component.
The main chemical compositions of described highly-purity magnesite particle is: MgO is 94 ~ 95wt%, ZrO
2be 1.5 ~ 2.0wt%; The density of highly-purity magnesite particle is 3.18 ~ 3.20g/cm
3, apparent porosity is 6.5 ~ 7.0%, and granularity is 5 ~ 0.088mm.
The main chemical compositions of described highly-purity magnesite fine powder is: MgO is 94 ~ 95wt%, ZrO
2be 1.5 ~ 2.0wt%; The granularity of highly-purity magnesite fine powder is 1 ~ 88 μm.
The main chemical compositions of described fused hercynite fine powder is: Fe
2o
3be 46 ~ 47wt%, Al
2o
3be 48 ~ 49wt%; The granularity of fused hercynite fine powder is 1 ~ 88 μm.
SiC >=98wt% in described carbide fine powder; The granularity of carbide fine powder is 1 ~ 88 μm.
The solid content of described Alumina gel is 20 ~ 25wt%, and pH value is 6 ~ 7.Owing to taking technique scheme, the present invention compared with prior art has following positively effect:
1, the present invention utilizes the mechanism of appraising at the current rate of hercynite iron in oxidation-reduction atmosphere, forms iron aluminium-pleonast(e) sosoloid, improves the heat conductivility of fire channel wall of carbon roasting furnace.
2, the present invention is without the need to the treatment technology of special Preparation equipment and complexity, and technical process is simple.
3, the fire channel wall of carbon roasting furnace prefabricated component that prepared by the present invention is integrated poured, improves globality and the operating efficiency of fire channel wall of carbon roasting furnace, reduces maintenance cost.
4, the fire channel wall of carbon roasting furnace prefabricated component prepared of the present invention after measured: thermal conductivity (1000 DEG C) is 7.2 ~ 8.0W/mK; Thermal shock (T=950 DEG C, air-cooled 5 times) afterwards strength retention is 88 ~ 93%; Volume density is 2.95 ~ 3.05g/cm
3.
Therefore, the present invention has energy-conserving and environment-protective and the simple feature of technique; Prepared fire channel wall of carbon roasting furnace prefabricated component thermal conductivity is large, thermal shock resistance is excellent, density is high and good integrity.
Embodiment
Below in conjunction with embodiment, the invention will be further described, the restriction not to its protection domain.
For avoiding repetition, first by the raw material involved by this embodiment and Alumina gel Unify legislation as follows, repeat no more in embodiment:
The main chemical compositions of described highly-purity magnesite particle is: MgO is 94 ~ 95wt%, ZrO
2be 1.5 ~ 2.0wt%; The density of highly-purity magnesite particle is 3.18 ~ 3.20g/cm
3, apparent porosity is 6.5 ~ 7.0%, and granularity is 5 ~ 0.088mm.
The main chemical compositions of described highly-purity magnesite fine powder is: MgO is 94 ~ 95wt%, ZrO
2be 1.5 ~ 2.0wt%; The granularity of highly-purity magnesite fine powder is 1 ~ 88 μm.
The main chemical compositions of described fused hercynite fine powder is: Fe
2o
3be 46 ~ 47wt%, Al
2o
3be 48 ~ 49wt%; The granularity of fused hercynite fine powder is 1 ~ 88 μm.
SiC >=98wt% in described carbide fine powder; The granularity of carbide fine powder is 1 ~ 88 μm.
The solid content of described Alumina gel is 20 ~ 25wt%, and pH value is 6 ~ 7.
Embodiment 1
A kind of fire channel wall of carbon roasting furnace prefabricated component and preparation method thereof.First with the carbide fine powder of the fused hercynite fine powder of the highly-purity magnesite fine powder of the highly-purity magnesite particle of 60 ~ 64wt%, 21 ~ 25wt%, 8 ~ 12wt% and 5 ~ 8wt% for raw material, the Alumina gel of additional described raw material 6 ~ 7wt%, mix 5 ~ 10 minutes, casting, maintenance 18 ~ 20 hours under natural condition, the demoulding; Again the green compact after the demoulding to be placed under 90 ~ 110 DEG C of conditions dry 18 ~ 20 hours, to obtain fire channel wall of carbon roasting furnace prefabricated component.
Fire channel wall of carbon roasting furnace prefabricated component prepared by the present embodiment is after measured: thermal conductivity (1000 DEG C) is 7.8 ~ 8.0W/mK; Thermal shock (T=950 DEG C, air-cooled 5 times) afterwards strength retention is 91 ~ 93%; Volume density is 3.01 ~ 3.05g/cm
3.
Embodiment 2
A kind of fire channel wall of carbon roasting furnace prefabricated component and preparation method thereof.First with the carbide fine powder of the fused hercynite fine powder of the highly-purity magnesite fine powder of the highly-purity magnesite particle of 62 ~ 66wt%, 19 ~ 23wt%, 9 ~ 13wt% and 4 ~ 7wt% for raw material, the Alumina gel of additional described raw material 6 ~ 7wt%, mix 5 ~ 10 minutes, casting, maintenance 20 ~ 22 hours under natural condition, the demoulding; Again the green compact after the demoulding to be placed under 90 ~ 110 DEG C of conditions dry 20 ~ 22 hours, to obtain fire channel wall of carbon roasting furnace prefabricated component.
Fire channel wall of carbon roasting furnace prefabricated component prepared by the present embodiment is after measured: thermal conductivity (1000 DEG C) is 7.6 ~ 7.9W/mK; Thermal shock (T=950 DEG C, air-cooled 5 times) afterwards strength retention is 90 ~ 92%; Volume density is 2.99 ~ 3.03g/cm
3.
Embodiment 3
A kind of fire channel wall of carbon roasting furnace prefabricated component and preparation method thereof.First with the carbide fine powder of the fused hercynite fine powder of the highly-purity magnesite fine powder of the highly-purity magnesite particle of 64 ~ 68wt%, 17 ~ 21wt%, 10 ~ 14wt% and 3 ~ 6wt% for raw material, the Alumina gel of additional described raw material 6 ~ 7wt%, mix 5 ~ 10 minutes, casting, maintenance 22 ~ 24 hours under natural condition, the demoulding; Again the green compact after the demoulding to be placed under 90 ~ 110 DEG C of conditions dry 22 ~ 24 hours, to obtain fire channel wall of carbon roasting furnace prefabricated component.
Fire channel wall of carbon roasting furnace prefabricated component prepared by the present embodiment is after measured: thermal conductivity (1000 DEG C) is 7.4 ~ 7.7W/mK; Thermal shock (T=950 DEG C, air-cooled 5 times) afterwards strength retention is 89 ~ 91%; Volume density is 2.97 ~ 3.01g/cm
3.
Embodiment 4
A kind of fire channel wall of carbon roasting furnace prefabricated component and preparation method thereof.First with the carbide fine powder of the fused hercynite fine powder of the highly-purity magnesite fine powder of the highly-purity magnesite particle of 66 ~ 70wt%, 15 ~ 19wt%, 11 ~ 15wt% and 2 ~ 5wt% for raw material, the Alumina gel of additional described raw material 6 ~ 7wt%, mix 5 ~ 10 minutes, casting, maintenance 24 ~ 26 hours under natural condition, the demoulding; Again the green compact after the demoulding to be placed under 90 ~ 110 DEG C of conditions dry 24 ~ 26 hours, to obtain fire channel wall of carbon roasting furnace prefabricated component.
Fire channel wall of carbon roasting furnace prefabricated component prepared by the present embodiment is after measured: thermal conductivity (1000 DEG C) is 7.2 ~ 7.45W/mK; Thermal shock (T=950 DEG C, air-cooled 5 times) afterwards strength retention is 88 ~ 90%; Volume density is 2.95 ~ 2.99g/cm
3.
This embodiment compared with prior art has following positively effect:
1, this embodiment utilizes the mechanism of appraising at the current rate of hercynite iron in oxidation-reduction atmosphere, forms iron aluminium-pleonast(e) sosoloid, improves the heat conductivility of fire channel wall of carbon roasting furnace.
2, this embodiment is without the need to the treatment technology of special Preparation equipment and complexity, and technical process is simple.
3, the fire channel wall of carbon roasting furnace prefabricated component that prepared by this embodiment is integrated poured, improves globality and the operating efficiency of fire channel wall of carbon roasting furnace, reduces maintenance cost.
4, the fire channel wall of carbon roasting furnace prefabricated component prepared of this embodiment after measured: thermal conductivity (1000 DEG C) is 7.2 ~ 8.0W/mK; Thermal shock (T=950 DEG C, air-cooled 5 times) afterwards strength retention is 88 ~ 93%; Volume density is 2.95 ~ 3.05g/cm
3.
Therefore, this embodiment has energy-conserving and environment-protective and the simple feature of technique; Prepared fire channel wall of carbon roasting furnace prefabricated component thermal conductivity is large, thermal shock resistance is excellent, density is high and good integrity.
Claims (7)
1. the preparation method of a fire channel wall of carbon roasting furnace prefabricated component, it is characterized in that first with the carbide fine powder of the fused hercynite fine powder of the highly-purity magnesite fine powder of the highly-purity magnesite particle of 60 ~ 70wt%, 15 ~ 25wt%, 8 ~ 15wt% and 2 ~ 8wt% for raw material, the Alumina gel of additional described raw material 6 ~ 7wt%, mix 5 ~ 10 minutes, casting, maintenance 18 ~ 26 hours under natural condition, the demoulding; Again the green compact after the demoulding to be placed under 90 ~ 110 DEG C of conditions dry 18 ~ 26 hours, to obtain fire channel wall of carbon roasting furnace prefabricated component.
2. the preparation method of fire channel wall of carbon roasting furnace prefabricated component according to claim 1, is characterized in that the main chemical compositions of described highly-purity magnesite particle is: MgO is 94 ~ 95wt%, ZrO
2be 1.5 ~ 2.0wt%; The density of highly-purity magnesite particle is 3.18 ~ 3.20g/cm
3, apparent porosity is 6.5 ~ 7.0%, and granularity is 5 ~ 0.088mm.
3. the preparation method of fire channel wall of carbon roasting furnace prefabricated component according to claim 1, is characterized in that the main chemical compositions of described highly-purity magnesite fine powder is: MgO is 94 ~ 95wt%, ZrO
2be 1.5 ~ 2.0wt%; The granularity of highly-purity magnesite fine powder is 1 ~ 88 μm.
4. the preparation method of fire channel wall of carbon roasting furnace prefabricated component according to claim 1, is characterized in that the main chemical compositions of described fused hercynite fine powder is: Fe
2o
3be 46 ~ 47wt%, Al
2o
3be 48 ~ 49wt%; The granularity of fused hercynite fine powder is 1 ~ 88 μm.
5. the preparation method of fire channel wall of carbon roasting furnace prefabricated component according to claim 1, is characterized in that the SiC >=98wt% in described carbide fine powder; The granularity of carbide fine powder is 1 ~ 88 μm.
6. the preparation method of fire channel wall of carbon roasting furnace prefabricated component according to claim 1, it is characterized in that the solid content of described Alumina gel is 20 ~ 25wt%, pH value is 6 ~ 7.
7. a fire channel wall of carbon roasting furnace prefabricated component, is characterized in that described fire channel wall of carbon roasting furnace prefabricated component is the fire channel wall of carbon roasting furnace prefabricated component prepared by the preparation method of fire channel wall of carbon roasting furnace prefabricated component according to any one of claim 1 ~ 6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510962114.9A CN105503211A (en) | 2015-12-21 | 2015-12-21 | Prefabricated part for flue wall of carbon baking furnace and preparation method of prefabricated part |
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| CN201510962114.9A CN105503211A (en) | 2015-12-21 | 2015-12-21 | Prefabricated part for flue wall of carbon baking furnace and preparation method of prefabricated part |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106631061A (en) * | 2016-12-15 | 2017-05-10 | 河南瑞泰耐火材料科技有限公司 | High-thermal-conductivity magnesium-rich spinel composite brick for flue wall and preparation method of composite brick |
| CN106747341A (en) * | 2016-12-02 | 2017-05-31 | 郑州东方科技耐火材料有限公司 | A kind of carbon roasting furnace preparation method of low creep energy-conserving and environment-protective refractory material |
| CN107540356A (en) * | 2017-09-04 | 2018-01-05 | 河南鑫诚耐火材料股份有限公司 | A kind of carbon baking furnace flame path wall novel energy-conserving prefabricated component and preparation method thereof |
| CN111072049A (en) * | 2019-12-28 | 2020-04-28 | 海城市中昊镁业有限公司 | Preparation method of high-density medium-grade sintered magnesia |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3753744A (en) * | 1971-12-27 | 1973-08-21 | Nippon Crucible Co | Graphite-alumina-silicon carbide base refractory |
| CN102659419A (en) * | 2012-03-13 | 2012-09-12 | 任健均 | High-temperature material used in carbon baking furnace |
-
2015
- 2015-12-21 CN CN201510962114.9A patent/CN105503211A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3753744A (en) * | 1971-12-27 | 1973-08-21 | Nippon Crucible Co | Graphite-alumina-silicon carbide base refractory |
| CN102659419A (en) * | 2012-03-13 | 2012-09-12 | 任健均 | High-temperature material used in carbon baking furnace |
Non-Patent Citations (1)
| Title |
|---|
| 丁雄风等: "尖晶石对炭素焙烧炉用方镁石-镁铝尖晶石材料性能的影响", 《耐火材料》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106747341A (en) * | 2016-12-02 | 2017-05-31 | 郑州东方科技耐火材料有限公司 | A kind of carbon roasting furnace preparation method of low creep energy-conserving and environment-protective refractory material |
| CN106631061A (en) * | 2016-12-15 | 2017-05-10 | 河南瑞泰耐火材料科技有限公司 | High-thermal-conductivity magnesium-rich spinel composite brick for flue wall and preparation method of composite brick |
| CN107540356A (en) * | 2017-09-04 | 2018-01-05 | 河南鑫诚耐火材料股份有限公司 | A kind of carbon baking furnace flame path wall novel energy-conserving prefabricated component and preparation method thereof |
| CN111072049A (en) * | 2019-12-28 | 2020-04-28 | 海城市中昊镁业有限公司 | Preparation method of high-density medium-grade sintered magnesia |
| CN111072049B (en) * | 2019-12-28 | 2022-09-27 | 海城市中昊镁业有限公司 | Preparation method of high-density medium-grade sintered magnesia |
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