CN100548926C - Magnesium-chromium composite spinelle brick - Google Patents
Magnesium-chromium composite spinelle brick Download PDFInfo
- Publication number
- CN100548926C CN100548926C CNB200710189926XA CN200710189926A CN100548926C CN 100548926 C CN100548926 C CN 100548926C CN B200710189926X A CNB200710189926X A CN B200710189926XA CN 200710189926 A CN200710189926 A CN 200710189926A CN 100548926 C CN100548926 C CN 100548926C
- Authority
- CN
- China
- Prior art keywords
- magnesia
- spinel sand
- mgo
- sio
- cao
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000011449 brick Substances 0.000 title claims abstract description 21
- NACUKFIFISCLOQ-UHFFFAOYSA-N [Mg].[Cr] Chemical compound [Mg].[Cr] NACUKFIFISCLOQ-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 239000002131 composite material Substances 0.000 title claims abstract description 15
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 334
- 239000000463 material Substances 0.000 claims abstract description 198
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 167
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 121
- 229910052596 spinel Inorganic materials 0.000 claims abstract description 89
- 239000011029 spinel Substances 0.000 claims abstract description 89
- 239000004576 sand Substances 0.000 claims abstract description 87
- 229910004298 SiO 2 Inorganic materials 0.000 claims abstract description 46
- 239000011651 chromium Substances 0.000 claims abstract description 46
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000000843 powder Substances 0.000 claims description 39
- 239000002245 particle Substances 0.000 claims description 19
- 239000011236 particulate material Substances 0.000 claims description 19
- 238000001035 drying Methods 0.000 claims description 15
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L magnesium chloride Substances [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 238000010304 firing Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000005245 sintering Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 3
- 238000000280 densification Methods 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 22
- 238000007670 refining Methods 0.000 description 3
- 239000011822 basic refractory Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a kind of magnesium-chromium composite spinelle brick, made according to following weight per-cent by synthetic magnesia chrome spinel sand, magnesia, fine chrome mine and chromic oxide: 1# synthesizes magnesia chrome spinel sand material: get MgO:65-70; Cr
2O
3: 20-25; SiO
2: 0.5-1.2; Fe
2O
3: 4-6; Al
2O
3: 2-4; CaO:0.5-1.2; 2# synthesizes magnesia chrome spinel sand material: get MgO:55-60; Cr
2O
3: 30-35; SiO
2: 0.5-1.2; Fe
2O
3: 4-6; Al
2O
3: 2-4; CaO:0.5-1.2; 3# synthesizes magnesia chrome spinel sand material: get MgO:70-75; Cr
2O
3: 14-19; SiO
2: 0.8-1.2; Fe
2O
3: 4.5-7; Al
2O
3: 2-4; CaO:0.8-1.5; Magnesia material: get MgO:97-98.5; SiO
2: 0.5-1.3; CaO:0.5-1.3; Fe
2O
3: 0.2-0.5; Fine chrome mine material: get Cr
2O
3: 50-60; MgO:9-15; SiO
2: 0.3-1.5; CaO:0.5-1; Fe
2O
3: 15-25; Al
2O
3: 8-15; Chromic oxide material: get Cr
2O
3: 92-96; ZrO:4-8.The invention has the advantages that have the weave construction densification, characteristic such as heat-resisting shake, antistripping, anti-erosion.
Description
Technical field
The present invention relates to industrial kiln refractory brick, especially relate to industrial kiln magnesium-chromium composite spinelle bricks such as external refining RH stove, AOD stove, VOD stove.
Background technology
The refractory brick that uses in the Industrial Stoves such as external refining RH stove, AOD stove, VOD stove, require dense structure, have characteristics such as good heat-resisting shake, anti-erosion, antistripping, for prolonging the work-ing life of used high-grade basic refractory in this type of kiln, China is dependence on import always for a long time, has directly caused the raising of production cost.
Summary of the invention
The object of the invention is the magnesium-chromium composite spinelle brick that a kind of high-density is provided, has the good resistance spalling.
For achieving the above object, the present invention can take following technical proposals:
Magnesium-chromium composite spinelle brick of the present invention, it is to be prepared from according to following step by synthetic magnesia chrome spinel sand, magnesia, fine chrome mine and chromic oxide:
The first step, material is selected by weight percentage:
A, 1# synthesize magnesia chrome spinel sand material:
Get and consist of MgO:65-70; Cr
2O
3: 20-25; SiO
2: 0.5-1.2; Fe
2O
3: 4-6; Al
2O
3: 2-4; The synthetic magnesia chrome spinel sand material of CaO:0.5-1.2;
B, 2# synthesize magnesia chrome spinel sand material:
Get and consist of MgO:55-60; Cr
2O
3: 30-35; SiO
2: 0.5-1.2; Fe
2O
3: 4-6; Al
2O
3: 2-4; The synthetic magnesia chrome spinel sand material of CaO:0.5-1.2;
C, 3# synthesize magnesia chrome spinel sand material:
Get and consist of MgO:70-75; Cr
2O
3: 14-19; SiO
2: 0.8-1.2; Fe
2O
3: 4.5-7; Al
2O
3: 2-4; The synthetic magnesia chrome spinel sand material of CaO:0.8-1.5;
D, magnesia material:
Get and consist of MgO:97-98.5; SiO
2: 0.5-1.3; CaO:0.5-1.3; Fe
2O
3: the magnesia material of 0.2-0.5;
E, fine chrome mine material:
Get and consist of Cr
2O
3: 50-60; MgO:9-15; SiO
2: 0.3-1.5; CaO:0.5-1; Fe
2O
3: 15-25; Al
2O
3: the fine chrome mine material of 8-15;
F, chromic oxide material:
Get and consist of Cr
2O
3: 92-96; The chromic oxide material of ZrO:4-8;
Second step, the preparation of material:
A, with the broken particle that is ground into granularity≤5mm of the synthetic magnesia chrome spinel sand material of 1#;
B, with the broken particle that is ground into granularity≤4mm of the synthetic magnesia chrome spinel sand material of 2#;
C, with the broken particle that is ground into granularity≤4mm of the synthetic magnesia chrome spinel sand material of 3#;
D, with the broken fine powder of granularity that be ground into of magnesia material less than 0.088mm;
E, with the broken fine powder of granularity that be ground into of fine chrome mine material less than 0.088mm;
F, with the broken fine powder of granularity that be ground into of chromic oxide material less than 0.088mm;
The 3rd step: the proportioning of material:
The particle 55-65 part of getting granularity≤5mm in the synthetic magnesia chrome spinel sand material of 1# that from above-mentioned second step, makes respectively by weight; The particulate material 10-15 part of from the synthetic magnesia chrome spinel sand material of 2#, getting granularity≤4mm; The particulate material 10-15 part of from the synthetic magnesia chrome spinel sand material of 3#, getting granularity≤4mm; From the magnesia material, get granularity fine powder 8-12 part less than 0.088mm; From the fine chrome mine material, get granularity fine powder 2-4 part less than 0.088mm; From the chromic oxide material, get granularity fine powder 1-3 part less than 0.088mm;
The 4th step: brick is body formed:
The 3rd step material of getting is put into mixed grind equipment, add the 2-5 weight part, proportion is 1.15-1.30g/cm
3Magnesium chloride solution or lignosulfite make wedding agent, 8-20 minute mixed grind time, place pressure greater than moulding in the 5000KN pressing machine material after the mixed grind, make volume density 〉=3.35g/cm
3Work in-process;
The 5th step: dry and burn till:
Work in-process are placed carry out drying treatment in the moisture eliminator, drying temperature is 70-130 ℃, time of drying 〉=36 hour; Dried goods are fired, and firing temperature is 1650-1850 ℃, and sintering time is to get product in 80-150 hour.
The invention has the advantages that selecting the synthetic magnesium-chromium composite spinelle of high-quality is raw material, the technology of employing science, the magnesium-chromium composite spinelle brick that forms through high-pressure molding, high-temperature firing, have characteristics such as weave construction densification, heat-resisting shake, antistripping, anti-erosion, in iron and steel, external refining stove and coloured standard copper smelting furnace, use, life-span reaches advanced world standards, broken the situation of the high-grade basic refractory dependence on import of China, and export to developed countries such as Japan, Europe, year is earned foreign exchange 5,000,000 dollars, has driven the technical progress of the anti-material industry of China.
Superiority of the present invention is mainly reflected in: 1, adopt synthetic magnesia chrome spinel material, the inner magnesia chrome spinel of goods is physically well developed, content is high and be evenly distributed, the densification of goods weave construction, and corrosion resistance is strong.2, control firing time and speed of cooling improve oxygen partial pressure, and the inner crystal grain boundary secondary spinel of goods quantity is increased, and it is big that grain-size becomes, and effectively improved product volume density and hot strength.3, adopt chromic oxide to make the inner spheroidal little pore of class that forms of goods, effectively decomposed thermal stresses, stoped the expansion of crackle, make the goods antistripping that large increase arranged.
The physical and chemical index of goods of the present invention is as shown in the table:
| Project | Index |
| MgO ％ | 65-70 |
| Cr 2O 3 ％ | 20-26 |
| Al 2O 3 ％ | 1-5 |
| SiO 2 ％ | ≤2 |
| Void content % | 11-16 |
| Volume density g/cm3 | ≥3.30 |
| Compressive strength MPa | ≥60 |
| Refractoriness under load ℃ | ≥1700 |
| Thermal shock resistance (1000 ℃ of water-cooleds) is inferior | ≥4 |
Embodiment
Embodiment 1:
Magnesium-chromium composite spinelle brick of the present invention, it is to be prepared from according to following step by material magnesia chrome spinel sand, magnesia, fine chrome mine and chromic oxide:
The first step selects material to be by weight percentage:
A, 1# synthesize magnesia chrome spinel sand material:
Get MgO:65; Cr
2O
3: 25; SiO
2: 0.8; Fe
2O
3: 6; Al
2O
3: 2; CaO:1.2;
B, 2# synthesize magnesia chrome spinel sand material:
Get MgO:55; Cr
2O
3: 35; SiO
2: 0.8; Fe
2O
3: 6; Al
2O
3: 2; CaO:1.2;
C, 3# synthesize magnesia chrome spinel sand material:
Get MgO:70; Cr
2O
3: 19; SiO
2: 1.2; Fe
2O
3: 6; Al
2O
3: 3; CaO:0.8;
D, magnesia material:
Get MgO:98; SiO
2: 0.9; CaO:0.9; Fe
2O
3: 0.2;
E, fine chrome mine material:
Get Cr
2O
3: 50; MgO:15; SiO
2: 1.5; CaO:0.5; Fe
2O
3: 25; Al
2O
3: 8;
F, chromic oxide material:
Get Cr
2O
3: 96; ZrO:4;
Second step, the preparation of material:
A, with the broken particle that is ground into granularity≤5mm of the synthetic magnesia chrome spinel sand material of 1#.
B, with the broken particle that is ground into granularity≤4mm of the synthetic magnesia chrome spinel sand material of 2#;
C, with the broken particle that is ground into granularity≤4mm of the synthetic magnesia chrome spinel sand material of 3#;
D, with the broken fine powder of granularity that be ground into of magnesia material less than 0.088mm;
E, with the broken fine powder of granularity that be ground into of fine chrome mine material less than 0.088mm;
F, with the broken fine powder of granularity that be ground into of chromic oxide material less than 0.088mm;
The material proportion in the 3rd step is:
From the synthetic magnesia chrome spinel sand material of 1#, get 65 parts of the particulate material of granularity 5mm by weight; From the synthetic magnesia chrome spinel sand material of 2#, get 10 parts of the particulate material of granularity≤4mm; From the synthetic magnesia chrome spinel sand material of 3#, get 10 parts of the particulate material of granularity≤4mm; From the magnesia material, get granularity less than 12 parts of the fine powders of 0.088mm; From the fine chrome mine material, get granularity less than 2 parts of the fine powders of 0.088mm; From the chromic oxide material, get granularity less than 1 part of the fine powder of 0.088mm;
The 4th step: brick is body formed:
The 3rd step material of getting is put into mixed grind equipment, and adding 2-5 weight part proportion is 1.15-1.30g/cm
3Magnesium chloride solution or lignosulfite make wedding agent, 8-20 minute mixed grind time, place pressure greater than moulding in the 5000KN pressing machine material after the mixed grind, make volume density 〉=3.35g/cm
3Work in-process;
The 5th step: dry and burn till:
Work in-process are placed carry out drying treatment in the moisture eliminator, drying temperature is 70-130 ℃, time of drying 〉=36 hour; Dried goods are fired, and firing temperature is 1650-1850 ℃, and sintering time is to get product in 80-150 hour.
Embodiment 2:
Magnesium-chromium composite spinelle brick of the present invention, it is to be prepared from according to following step by material magnesia chrome spinel sand, magnesia, fine chrome mine and chromic oxide:
The first step selects material to be by weight percentage:
A, 1# synthesize magnesia chrome spinel sand material:
Get MgO:70; Cr
2O
3: 20; SiO
2: 1.2; Fe
2O
3: 4; AL
2O
3: 4; CaO:0.8;
B, 2# synthesize magnesia chrome spinel sand material:
Get MgO:60; Cr
2O
3: 30; SiO
2: 1.2; Fe
2O
3: 4; AL
2O
3: 4; CaO:0.8;
C, 3# synthesize magnesia chrome spinel sand material:
Get MgO:75; Cr
2O
3: 14; SiO
2: 1; Fe
2O
3: 4.5; AL
2O
3: 4; CaO:1.5;
D, magnesia material:
Get MgO:97; SiO
2: 1.3; CaO:1.3; Fe
2O
3: 0.4;
E, fine chrome mine material:
Get Cr
2O
3: 60; MgO:9; SiO
2: 0.3; CaO:0.7; Fe
2O
3: 15; Al
2O
3: 15;
F, chromic oxide material:
Get Cr
2O
3: 94; ZrO:6.。
Second step, the preparation of material:
A, with the broken particle that is ground into granularity≤5mm of the synthetic magnesia chrome spinel sand material of 1#;
B, with the broken particle that is ground into granularity≤4mm of the synthetic magnesia chrome spinel sand material of 2#;
C, with the broken particle that is ground into granularity≤4mm of the synthetic magnesia chrome spinel sand material of 3#;
D, with the broken fine powder of granularity that be ground into of magnesia material less than 0.088mm;
E, with the broken fine powder of granularity that be ground into into of fine chrome mine material less than 0.088mm;
F, with the broken fine powder of granularity that be ground into of chromic oxide material less than 0.088mm;
The material proportion in the 3rd step is:
Get 60 parts of particles in the synthetic magnesia chrome spinel sand material of 1# that from above-mentioned second step, makes respectively by weight; From the synthetic magnesia chrome spinel sand material of 2#, get 12.5 parts of particulate material; From the synthetic magnesia chrome spinel sand material of 3#, get 12.5 parts of particulate material; From the magnesia material, get 10 parts of fine powders; From the fine chrome mine material, get 3 parts of fine powders; From the chromic oxide material, get 2 parts of fine powders;
The 4th step: brick is body formed:
The 3rd step material of getting is put into mixed grind equipment, and adding 2-5 weight part proportion is 1.15-1.30g/cm
3Magnesium chloride solution or lignosulfite make wedding agent, 8-20 minute mixed grind time, place pressure greater than moulding in the 5000KN pressing machine material after the mixed grind, make volume density 〉=3.35g/cm
3Work in-process;
The 5th step: dry and burn till:
Work in-process are placed carry out drying treatment in the moisture eliminator, drying temperature is 70-130 ℃, time of drying 〉=36 hour; Dried goods are fired, and firing temperature is 1650-1850 ℃, and sintering time is to get product in 80-150 hour.
Embodiment 3:
Magnesium-chromium composite spinelle brick of the present invention, it is to be prepared from according to following step by material magnesia chrome spinel sand, magnesia, fine chrome mine and chromic oxide:
The first step selects material to be by weight percentage:
A, 1# synthesize magnesia chrome spinel sand material:
Get MgO:68; Cr
2O
3: 23; SiO
2: 0.5; Fe
2O
3: 5; Al
2O
3: 3; CaO:0.5;
B, 2# synthesize magnesia chrome spinel sand material:
Get MgO:58; Cr
2O
3: 33; SiO
2: 0.5; Fe
2O
3: 5; AL
2O
3: 3; CaO:0.5;
C, 3# synthesize magnesia chrome spinel sand material:
Get MgO:72.5; Cr
2O
3: 16.5; SiO
2: 0.8; Fe
2O
3: 7; AL
2O
3: 2; CaO:1.2;
D, magnesia material:
Get MgO:98.5; SiO
2: 0.5; CaO:0.5; Fe
2O
3: 0.5;
E, fine chrome mine material:
Get Cr
2O
3: 55; MgO:12; SiO
2: 1.0; CaO:1.0; Fe
2O
3: 20; Al
2O
3: 11;
F, chromic oxide material:
Get Cr
2O
3: 92; ZrO:8;
Second step, the preparation of material:
A, with the broken particle that is ground into granularity≤5mm of the synthetic magnesia chrome spinel sand material of 1#;
B, with the broken particle that is ground into granularity≤4mm of the synthetic magnesia chrome spinel sand material of 2#;
C, with the broken particle that is ground into granularity≤4mm of the synthetic magnesia chrome spinel sand material of 3#;
D, with the broken fine powder of granularity that be ground into of magnesia material less than 0.088mm;
E, with the broken fine powder of granularity that be ground into into of fine chrome mine material less than 0.088mm;
F, with the broken fine powder of granularity that be ground into of chromic oxide material less than 0.088mm;
The material proportion in the 3rd step is:
From the synthetic magnesia chrome spinel sand material of 1#, get 55 parts of particulate material by weight; From the synthetic magnesia chrome spinel sand material of 2#, get 15 parts of particulate material; From the synthetic magnesia chrome spinel sand material of 3#, get 15 parts of pellets; From the magnesia material, get 8 parts of fine powders; From the fine chrome mine material, get 4 parts of fine powders; From the chromic oxide material, get 3 parts of fine powders;
The 4th step: brick is body formed:
The 3rd step material of getting is put into mixed grind equipment, and adding 2-5 weight part proportion is 1.15-1.30g/cm
3Magnesium chloride solution or lignosulfite make wedding agent, 8-20 minute mixed grind time, place pressure greater than moulding in the 5000KN pressing machine material after the mixed grind, make volume density 〉=3.35g/cm
3Work in-process;
The 5th step: dry and burn till:
Work in-process are placed carry out drying treatment in the moisture eliminator, drying temperature is 70-130 ℃, time of drying 〉=36 hour; Dried goods are fired, and firing temperature is 1650-1850 ℃, and sintering time is to get product in 80-150 hour.
Claims (4)
1, a kind of magnesium-chromium composite spinelle brick is characterized in that: it is to be prepared from according to following step by synthetic magnesia chrome spinel sand, magnesia, fine chrome mine and chromic oxide:
The first step, material is selected by weight percentage:
A, 1# synthesize magnesia chrome spinel sand material:
Get and consist of MgO:65-70; Cr
2O
3: 20-25; SiO
2: 0.5-1.2; Fe
2O
3: 4-6; Al
2O
3: 2-4;
The synthetic magnesia chrome spinel sand material of CaO:0.5-1.2;
B, 2# synthesize magnesia chrome spinel sand material:
Get and consist of MgO:55-60; Cr
2O
3: 30-35; SiO
2: 0.5-1.2; Fe
2O
3: 4-6; Al
2O
3: 2-4;
The synthetic magnesia chrome spinel sand material of CaO:0.5-1.2;
C, 3# synthesize magnesia chrome spinel sand material:
Get and consist of MgO:70-75; Cr
2O
3: 14-19; SiO
2: 0.8-1.2; Fe
2O
3: 4.5-7; Al
2O
3: 2-4;
The synthetic magnesia chrome spinel sand material of CaO:0.8-1.5;
D, magnesia material:
Get and consist of MgO:97-98.5; SiO
2: 0.5-1.3; CaO:0.5-1.3; Fe
2O
3: the magnesia material of 0.2-0.5;
E, fine chrome mine material:
Get and consist of Cr
2O
3: 50-60; MgO:9-15; SiO
2: 0.3-1.5; CaO:0.5-1; Fe
2O
3: 15-25; Al
2O
3: the fine chrome mine material of 8-15;
F, chromic oxide material:
Get and consist of Cr
2O
3: 92-96; The chromic oxide material of ZrO:4-8;
Second step, the preparation of material:
A, with the broken particle that is ground into granularity≤5mm of the synthetic magnesia chrome spinel sand material of 1#;
B, with the broken particle that is ground into granularity≤4mm of the synthetic magnesia chrome spinel sand material of 2#;
C, with the broken particle that is ground into granularity≤4mm of the synthetic magnesia chrome spinel sand material of 3#;
D, with the broken fine powder of granularity that be ground into of magnesia material less than 0.088mm;
E, with the broken fine powder of granularity that be ground into of fine chrome mine material less than 0.088mm;
F, with the broken fine powder of granularity that be ground into of chromic oxide material less than 0.088mm;
0 the 3rd step: the proportioning of material:
The particle 55-65 part of getting granularity≤5mm in the synthetic magnesia chrome spinel sand material of 1# that from above-mentioned second step, makes respectively by weight; The particulate material 10-15 part of from the synthetic magnesia chrome spinel sand material of 2#, getting granularity≤4mm; The particulate material 10-15 part of from the synthetic magnesia chrome spinel sand material of 3#, getting granularity≤4mm; From the magnesia material, get granularity fine powder 8-12 part less than 0.088mm; From the fine chrome mine material, get granularity fine powder 2-4 part less than 0.088mm; From the chromic oxide material, get granularity fine powder 1-3 part less than 0.088mm;
The 4th step: brick is body formed:
The 3rd step material of getting is put into mixed grind equipment, add the 2-5 weight part, proportion is 1.15-1.30g/cm
3Magnesium chloride solution or lignosulfite make wedding agent, 8-20 minute mixed grind time, place pressure greater than moulding in the 5000KN pressing machine material after the mixed grind, make volume density 〉=3.35g/cm
3Work in-process;
The 5th step: dry and burn till:
Work in-process are placed carry out drying treatment in the moisture eliminator, drying temperature is 70-130 ℃, time of drying 〉=36 hour; Dried goods are fired, and firing temperature is 1650-1850 ℃, and sintering time is to get product in 80-150 hour.
2, magnesium-chromium composite spinelle brick according to claim 1 is characterized in that: the described the first step selects material to be by weight percentage:
A, 1# synthesize magnesia chrome spinel sand material:
Get and consist of MgO:65; Cr
2O
3: 25; SiO
2: 0.8; Fe
2O
3: 6; Al
2O
3: 2; The synthetic magnesia chrome spinel sand material of CaO:1.2;
B, 2# synthesize magnesia chrome spinel sand material:
Get and consist of MgO:55; Cr
2O
3: 35; SiO
2: 0.8; Fe
2O
3: 6; Al
2O
3: 2; The synthetic magnesia chrome spinel sand material of CaO:1.2;
C, 3# synthesize magnesia chrome spinel sand material:
Get and consist of MgO:70; Cr
2O
3: 19; SiO
2: 1.2; Fe
2O
3: 6; Al
2O
3: 3; The synthetic magnesia chrome spinel sand material of CaO:0.8;
D, magnesia material:
Get and consist of MgO:98; SiO
2: 0.9; CaO:0.9; Fe
2O
3: 0.2 magnesia material;
E, fine chrome mine material:
Get and consist of Cr
2O
3: 50; MgO:15; SiO
2: 1.5; CaO:0.5; Fe
2O
3: 25; Al
2O
3: 8 fine chrome mine material;
F, chromic oxide material:
Get and consist of Cr
2O
3: 96; The chromic oxide material of ZrO:4;
The material proportion in described the 3rd step is:
Get 65 parts of particulate material in the brilliant right sand material of the synthetic magnesium chromium point of the 1# that from above-mentioned second step, makes respectively by weight; From the synthetic magnesia chrome spinel sand material of 2#, get 10 parts of particulate material; From the synthetic magnesia chrome spinel sand material of 3#, get 10 parts of particulate material; From the magnesia material, get 12 parts of fine powders; From the fine chrome mine material, get 2 parts of fine powders; From the chromic oxide material, get 1 part of fine powder.
3, magnesium-chromium composite spinelle brick according to claim 1 is characterized in that: the described the first step selects material to be by weight percentage:
A, 1# synthesize magnesia chrome spinel sand material:
Get and consist of MgO:70; Cr
2O
3: 20; SiO
2: 1.2; Fe
2O
3: 4; AL
2O
3: 4; The synthetic magnesia chrome spinel sand material of CaO:0.8;
B, 2# synthesize magnesia chrome spinel sand material:
Get and consist of MgO:60; Cr
2O
3: 30; SiO
2: 1.2; Fe
2O
3: 4; AL
2O
3: 4; The synthetic magnesia chrome spinel sand material of CaO:0.8;
C, 3# synthesize magnesia chrome spinel sand material:
Get and consist of MgO:75; Cr
2O
3: 14; SiO
2: 1; Fe
2O
3: 4.5; AL
2O
3: 4; The synthetic magnesia chrome spinel sand material of CaO:1.5;
D, magnesia material:
Get and consist of MgO:97; SiO
2: 1.3; CaO:1.3; Fe
2O
3: 0.4 magnesia material;
E, fine chrome mine material:
Get and consist of Cr
2O
3: 60; MgO:9; SiO
2: 0.3; CaO:0.7; Fe
2O
3: 15; Al
2O
3: 15 fine chrome mine material;
F, chromic oxide material:
Get and consist of Cr
2O
3: 94; The chromic oxide material of ZrO:6;
The material proportion in described the 3rd step is:
Get 60 parts of particles in the synthetic magnesia chrome spinel sand material of 1# that from above-mentioned second step, makes respectively by weight; From the synthetic magnesia chrome spinel sand material of 2#, get 12.5 parts of particulate material; From the synthetic magnesia chrome spinel sand material of 3#, get 12.5 parts of particulate material; From the magnesia material, get 10 parts of fine powders; From the fine chrome mine material, get 3 parts of fine powders; From the chromic oxide material, get 2 parts of fine powders.
4, magnesium-chromium composite spinelle brick according to claim 1 is characterized in that: the described the first step selects material to be by weight percentage:
A, 1# synthesize magnesia chrome spinel sand material:
Get and consist of MgO:68; Cr
2O
3: 23; SiO
2: 0.5; Fe
2O
3: 5; Al
2O
3: 3; The synthetic magnesia chrome spinel sand material of CaO:0.5;
B, 2# synthesize magnesia chrome spinel sand material:
Get and consist of MgO:58; Cr
2O
3: 33; SiO
2: 0.5; Fe
2O
3: 5; AL
2O
3: 3; The synthetic magnesia chrome spinel sand material of CaO:0.5;
C, 3# synthesize magnesia chrome spinel sand material:
Get and consist of MgO:72.5; Cr
2O
3: 16.5; SiO
2: 0.8; Fe
2O
3: 7; AL
2O
3: 2; The synthetic magnesia chrome spinel sand material of CaO:1.2;
D, magnesia material:
Get and consist of MgO:98.5; SiO
2: 0.5; CaO:0.5; Fe
2O
3: 0.5 magnesia material;
E, fine chrome mine material:
Get and consist of Cr
2O
3: 55; MgO:12; SiO
2: 1; CaO:1; Fe
2O
3: 20; Al
2O
3: 11 fine chrome mine material;
F, chromic oxide material:
Get and consist of Cr
2O
3: 92; The chromic oxide material of ZrO:8;
The material proportion in described the 3rd step is:
Get 55 parts of particulate material in the synthetic magnesia chrome spinel sand material of 1# that from above-mentioned second step, makes respectively by weight; From the synthetic magnesia chrome spinel sand material of 2#, get 15 parts of particulate material; From the synthetic magnesia chrome spinel sand material of 3#, get 15 parts of particulate material; From the magnesia material, get 8 parts of fine powders; From the fine chrome mine material, get 4 parts of fine powders; From the chromic oxide material, get 3 parts of fine powders.
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| CN102674860B (en) * | 2012-05-24 | 2013-11-27 | 洛阳理工学院 | Refractory castable for submerged-arc furnace for smelting ferro-nickel by using laterite-nickel ore |
| CN107235722A (en) * | 2017-06-30 | 2017-10-10 | 长兴泓矿炉料有限公司 | A kind of magnesium chromium firebrick and preparation method thereof |
| CN107473716B (en) * | 2017-09-25 | 2019-11-26 | 武汉科技大学 | A kind of micropore magnesia chrome spinel raw material and preparation method thereof |
| CN108383506A (en) * | 2018-03-12 | 2018-08-10 | 海城利尔麦格西塔材料有限公司 | A kind of preparation method of magnesium Cr-Zr brick |
| CN109912312B (en) * | 2019-04-25 | 2022-05-24 | 郑州金世耐火材料有限公司 | Anti-erosion refractory castable |
| CN110655411A (en) * | 2019-10-25 | 2020-01-07 | 海城利尔麦格西塔材料有限公司 | Magnesium-chromium unburned brick for AOD furnace and preparation method thereof |
| CN111943718A (en) * | 2020-08-25 | 2020-11-17 | 洛阳科创新材料股份有限公司 | Porous ceramic part for metal liquid purifier and preparation method thereof |
| CN116253575B (en) * | 2023-03-21 | 2024-05-07 | 东北大学 | Magnesium-chromium sand magnesium-based ceramic core and preparation method thereof |
| CN116332635B (en) * | 2023-04-04 | 2024-02-06 | 中钢洛耐科技股份有限公司 | Electric smelting zirconium magnesium chromium spinel raw material and preparation method thereof |
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