CN101591189A - Cr-Zr brick for coal slurry gasifier and preparation method thereof - Google Patents
Cr-Zr brick for coal slurry gasifier and preparation method thereof Download PDFInfo
- Publication number
- CN101591189A CN101591189A CNA2009100478351A CN200910047835A CN101591189A CN 101591189 A CN101591189 A CN 101591189A CN A2009100478351 A CNA2009100478351 A CN A2009100478351A CN 200910047835 A CN200910047835 A CN 200910047835A CN 101591189 A CN101591189 A CN 101591189A
- Authority
- CN
- China
- Prior art keywords
- brick
- raw material
- coal slurry
- preparation
- slurry gasifier
- Prior art date
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Abstract
The present invention relates to the Cr-Zr brick preparing technical field, relate in particular to a kind of Cr-Zr brick for coal slurry gasifier and preparation method thereof, adopt following weight percent raw material: 85～90% Cr
2O
3, 3～8% ZrO
2, 3～6% Al
2O
3, 0.1～1% Y
2O
3, 2～3% wedding agent, form by following prepared: take by weighing raw material; With raw material with 10～40 ℃ mix became pug in 15～40 minutes after, put into friction press, with 150～200MPa extrusion forming; Again with 200～250 ℃, after dry 24～48 hours, in rare gas element, with 1450～1550 ℃ burnt till 8～16 hours finished product.The present invention compares with prior art, and rare earth oxide not only plays stablizes ZrO
2Effect, go back acceleration of sintering, firing temperature is descended; And the employing inert atmosphere avoids generating high valence chrome, realizes environmental protection, the long service life of finished product.
Description
[technical field]
The present invention relates to the Cr-Zr brick preparing technical field, relate in particular to a kind of Cr-Zr brick for coal slurry gasifier and preparation method thereof.
[background technology]
The coal slurry gasifier inner lining material generally adopts Cr-Zr brick at present. and common way is to adopt industrial Cr
2O
3Be main raw material, add a small amount of ZrO
2With logical Y
2O
3By sintering or the synthetic chromium zircon sand of electric smelting, break into particle then, add wedding agent and mix, will be through moulding. dried biscuit is placed in the high temperature kiln and is burnt till. and the shortcoming of this processing method is the firing temperature height, the goods poor heat stability, and easily generate high valence chrome, produce public hazards.
[summary of the invention]
The objective of the invention is to overcome the deficiencies in the prior art, is to add ZrO on the basis of main raw material at high chromium sand
2.Al
2O
3And rare earth oxide, in sintering procedure, adopt inert protective atmosphere, firing temperature is descended, the goods thermostability improves, and avoids generating high valence chrome and improves environment.
For achieving the above object, the present invention proposes a kind of Cr-Zr brick for coal slurry gasifier, it is characterized in that adopting following weight percent feedstock production to form: 85～90% Cr
2O
3, 3～8% ZrO
2, 3～6% Al
2O
3, 0.1～1% Y
2O
3, 2～3% wedding agent.
A kind of preparation method of Cr-Zr brick for coal slurry gasifier is characterized in that comprising following processing step: (1) takes by weighing raw material: take by weighing raw material by above-mentioned weight percent; (2) mix: above-mentioned raw materials is put into planetary-type mixer, mix 15～40 minutes one-tenth pugs with 10～40 ℃; (3) green compact moulding: above-mentioned pug is put into friction press, with 150～200Mpa extrusion forming; (4) drying: green compact are adopted resistance furnace, with 200～250 ℃, dry 24～48 hours; (5) burn till: biscuit is adopted resistance furnace, in protection of inert gas atmosphere, burnt till 8～16 hours with 1450～1550 ℃, finished product.
Described wedding agent is a resol.
The present invention compares with prior art, has improved prescription, adds complementary batching in raw material, can reduce ZrO in the raw material electric smelting process
2Segregation, the effect of rare earth oxide is not only played and is stablized ZrO
2Effect, and can also acceleration of sintering, thus firing temperature is descended; Also improved technology in addition, adopt inert protective atmosphere in sintering procedure, avoided goods to generate high valence chrome, realized that product is nuisanceless, improved environment, reach 12000 hours the work-ing life of the finished product that makes, and is in the top standard of like product.
[specific embodiment]
Embodiment
Take by weighing following raw materials by weight percent:
Cr
2O
3： 89.0％
ZrO
2： 5.0％
Al
2O
3： 3.0％
Y
2O
3： 0.2％
Resol: 2.8%
Mix: above-mentioned raw materials is put into planetary-type mixer,, mix 40min and become pug with 20 ℃;
Green compact moulding: pug is put into friction press,, get green compact with the 180MPa extrusion forming;
Dry: into resistance furnace, with 110 ℃, dry 24h gets biscuit with green compact;
Burn till: biscuit is put into resistance furnace, in Ar atmosphere,, fire 12h, get finished product with 1450 ℃.
End properties after firing is as follows:
Cr
2O
3 88.46％
ZrO
2 4.87％
Fe
2O
3 0.23％
Apparent porosity 14%
Volume density 4.32g/cm
3
Compressive strength 143MPa
Thermal expansivity 6.3 * 10
-6K
-1
Claims (3)
1, a kind of Cr-Zr brick for coal slurry gasifier is characterized in that adopting following weight percent feedstock production to form: 85～90% Cr
2O
3, 3～8% ZrO
2, 3～6% Al
2O
3, 0.1～1% Y
2O
3, 2～3% wedding agent.
2, a kind of preparation method of Cr-Zr brick for coal slurry gasifier is characterized in that comprising following processing step: (1) takes by weighing raw material: take by weighing raw material by above-mentioned weight percent; (2) mix: above-mentioned raw materials is put into planetary-type mixer, mix 15～40 minutes one-tenth pugs with 10～40 ℃; (3) green compact moulding: above-mentioned pug is put into friction press,, get green compact with 150～200Mpa extrusion forming; (4) drying: green compact are adopted resistance furnace,, dry 24～48 hours, get biscuit with 200～250 ℃; (5) burn till: biscuit is adopted resistance furnace, in protection of inert gas atmosphere, burnt till 8～16 hours with 1450～1550 ℃, finished product.
3, the preparation method of a kind of Cr-Zr brick for coal slurry gasifier as claimed in claim 1 is characterized in that: described wedding agent is a resol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100478351A CN101591189A (en) | 2009-03-19 | 2009-03-19 | Cr-Zr brick for coal slurry gasifier and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100478351A CN101591189A (en) | 2009-03-19 | 2009-03-19 | Cr-Zr brick for coal slurry gasifier and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101591189A true CN101591189A (en) | 2009-12-02 |
Family
ID=41406095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100478351A Pending CN101591189A (en) | 2009-03-19 | 2009-03-19 | Cr-Zr brick for coal slurry gasifier and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101591189A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104591750A (en) * | 2014-12-10 | 2015-05-06 | 洛阳利尔耐火材料有限公司 | Segmented water coal slurry pressurized gasifier fireside surface brick and preparation method thereof |
| CN105541352A (en) * | 2015-12-21 | 2016-05-04 | 洛阳利尔耐火材料有限公司 | Chromium-alumina-carbon bricks and preparation method therefor |
| CN112194473A (en) * | 2020-06-30 | 2021-01-08 | 中国建筑材料科学研究总院有限公司 | Chrome corundum brick with high erosion resistance and thermal shock resistance prepared by secondary mixed grinding and drying and process thereof |
| CN113213901A (en) * | 2021-03-31 | 2021-08-06 | 江苏长城窑炉工程有限公司 | High-chromium sand ramming mass for alkali furnace |
-
2009
- 2009-03-19 CN CNA2009100478351A patent/CN101591189A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104591750A (en) * | 2014-12-10 | 2015-05-06 | 洛阳利尔耐火材料有限公司 | Segmented water coal slurry pressurized gasifier fireside surface brick and preparation method thereof |
| CN105541352A (en) * | 2015-12-21 | 2016-05-04 | 洛阳利尔耐火材料有限公司 | Chromium-alumina-carbon bricks and preparation method therefor |
| CN105541352B (en) * | 2015-12-21 | 2018-06-22 | 洛阳利尔耐火材料有限公司 | A kind of chromium Al2O3C Bricks and preparation method thereof |
| CN112194473A (en) * | 2020-06-30 | 2021-01-08 | 中国建筑材料科学研究总院有限公司 | Chrome corundum brick with high erosion resistance and thermal shock resistance prepared by secondary mixed grinding and drying and process thereof |
| CN112194473B (en) * | 2020-06-30 | 2022-05-27 | 中国建筑材料科学研究总院有限公司 | Chrome corundum brick with high erosion resistance and thermal shock resistance prepared by secondary mixed grinding and drying and process thereof |
| CN113213901A (en) * | 2021-03-31 | 2021-08-06 | 江苏长城窑炉工程有限公司 | High-chromium sand ramming mass for alkali furnace |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20091202 |