CN104844189A - Preparation method for single phase chromium-containing magnesia-alumina spinel powder - Google Patents
Preparation method for single phase chromium-containing magnesia-alumina spinel powder Download PDFInfo
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- CN104844189A CN104844189A CN201510144922.4A CN201510144922A CN104844189A CN 104844189 A CN104844189 A CN 104844189A CN 201510144922 A CN201510144922 A CN 201510144922A CN 104844189 A CN104844189 A CN 104844189A
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Abstract
The invention relates to a preparation method for single phase chromium-containing magnesia-alumina spinel powder, and belongs to refractory material preparation technique and solid waste recycling field. The method includes taking 325 mesh chromium-aluminum dreg fine powder and magnesia as raw material, mixing the raw material evenly and proportionally in a ball mill, carrying out calcination in air under a high temperature about 1400 DEG C~1600 DEG C, and cooling in a furnace to room temperature, finally getting the single phase chromium-containing magnesia-alumina spinel powder. The advantages are as follows: the powder has a low raw material cost, simple preparation process and strong corrosion resistance, and the acquired product could be used directly for preparing furnace lining refractory material in various industrial furnaces.
Description
Technical field
The present invention relates to a kind of single thing mutually containing the preparation method of the magnesium aluminium spinel powder of chromium, belong to refractory materials technology of preparing and solid waste resource recovery regeneration field.
Background technology
At present, China is general in steel-making with the furnace lining of some Industrial Stoves adopts magnalium series refractory material.Utilize the lamagal that magnesia and industrial aluminum alumina are made through calcining, it is by the impact generating magnesium-aluminium spinel bulking effect in high-temperature sintering process, thus resistance to thermal shock poor stability, and the coefficient of expansion is large, and furnace lining easily produces phenomenon of rupture.
The Mg-Al-Cr spinel sand that known references 1 Chinese patent CN1072402A (application number 91110953.6) is prepared with bauxitic clay, magnesia unslacked and chrome ore (or fine chrome mine), it has the features such as high temperature resistant and heat-resistant knocking stability, but chrome ore price used is more expensive, and production cost is higher.Chromium slag is the waste residue that thermite process produces chromium metal, containing Al in aluminium chromium slag
2o
3, Cr
2o
3at more than 95wt%, but foreign matter content is unstable in chromium slag, easily unstable product quality is caused as refractory materials using chromium slag, and the chromium metal contained in chromium slag, directly use as refractory materials the expansion and short texture problem that easily cause secondary oxidation to bring, cause it directly to apply and be restricted.
Summary of the invention
Large for existing magnalium series refractory material resistance to thermal shock poor stability and the coefficient of expansion, and the problem that Mg-Al-Cr spinel sand production cost is high.The invention provides a kind of single thing mutually containing the preparation method of the magnesium aluminium spinel powder of chromium.With chromium slag for raw material, in preparation process, add a certain amount of magnesia, the product resistance to thermal shock excellent in stability obtained and the coefficient of expansion little, reduce raw materials cost, and improve resistance to slag corrosion.
For achieving the above object, the present invention adopts following technical scheme:
Single thing containing a preparation method for the magnesium aluminium spinel powder of chromium, is characterized in that, comprises the steps: mutually
A, composition and mass percent are:
Aluminium chromium slag fine powder (325 order) 70% ~ 80% (industry byproduct of thermite process metal smelting chromium; Wherein containing 83% Al
2o
3with 12% Cr
2o
3);
Magnesia 20% ~ 30% (wherein containing MgO >=94%);
B, in above-mentioned steps a ratio batching, 325 order aluminium chromium slag concentration are after the chlorohydric acid pickling of 17%, mix with magnesia ball milling;
C, by mixed material, under air atmosphere condition, heat-up rate 3 ~ 10 DEG C/min, and 1400 DEG C ~ 1600 DEG C insulation 3h ~ 6h; Cool to room temperature with the furnace; Finally prepare single thing mutually containing the magnesium aluminium spinel powder of chromium.
Accompanying drawing explanation
Fig. 1 be different magnesia content with calcinating system prepared by single thing mutually containing the XRD figure spectrum of the magnesium aluminium spinel powder of chromium.
Embodiment
After now specific embodiments of the invention being described in.
embodiment 1
A, composition and mass percent are:
Single thing containing a preparation method for the magnesium aluminium spinel powder of chromium, comprises the steps: mutually
Aluminium chromium slag fine powder (325 order) 70% (industry byproduct of thermite process metal smelting chromium; Wherein containing 83% Al
2o
3with 12% Cr
2o
3);
Magnesia 30% (wherein containing MgO >=94%);
B, in above-mentioned steps a ratio batching, 325 order aluminium chromium slag fine powder concentration are after the chlorohydric acid pickling of 17%, mix with magnesia ball milling;
C, by mixed material, under air atmosphere condition, heat-up rate 4 DEG C/min, and 1450 DEG C insulation 6h; Cool to room temperature with the furnace; Finally prepare single thing mutually containing the magnesium aluminium spinel powder of chromium.
Single thing prepared by the present embodiment is mutually containing the magnesium aluminium spinel powder of chromium, and through material phase analysis, the thing of this material is the magnesium-aluminium spinel phase containing chromium mutually.Utilizing pycnometric method to measure its true density is 3.70 g/cm
3.Chemical composition mass percent is:
Al
2O
3 53%
MgO 33%，
Cr
2O
3 10%，
Other impurity 4%.
embodiment 2
The present embodiment is substantially the same manner as Example 1, and difference is, batching mass percent is: the 325 order aluminium chromium slag fine powders of 75%, 25% magnesia, 1500 DEG C of calcining 3h.Single thing prepared by the present embodiment contains the magnesium aluminium spinel powder of chromium, and through material phase analysis, the thing of this material is the magnesium-aluminium spinel phase containing chromium mutually.Utilizing pycnometric method to measure its true density is 4.43 g/cm
3.Chemical composition mass percent is:
Al
2O
3 57%
MgO 30%，
Cr
2O
3 9%，
Other impurity 4%.
Claims (1)
1. single thing is mutually containing a preparation method for the magnesium aluminium spinel powder of chromium, it is characterized in that, comprises the steps:
A, composition and mass percent are:
Aluminium chromium slag fine powder (325 order) 70% ~ 80% (industry byproduct of thermite process metal smelting chromium; Wherein containing 83% Al
2o
3with 12% Cr
2o
3);
Magnesia 20% ~ 30% (wherein containing MgO >=94%);
B, in above-mentioned steps a ratio batching, 325 order aluminium chromium slag concentration are after the chlorohydric acid pickling of 17%, mix with magnesia ball milling; By mixed material, under air atmosphere condition, heat-up rate 3 ~ 10 DEG C/min, and at 1400 DEG C ~ 1600 DEG C insulation 3h ~ 6h; Cool to room temperature with the furnace; Finally prepare single thing mutually containing magnesium aluminium spinel powder true density 3.70 g/cm of chromium
3~ 4.43g/cm
3, chemical composition mass percent is:
Al
2O
3 45%~65%，
MgO 25%~40%，
Cr
2O
3 8 %~11%，
Other impurity 2% ~ 4%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510144922.4A CN104844189A (en) | 2015-03-31 | 2015-03-31 | Preparation method for single phase chromium-containing magnesia-alumina spinel powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510144922.4A CN104844189A (en) | 2015-03-31 | 2015-03-31 | Preparation method for single phase chromium-containing magnesia-alumina spinel powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104844189A true CN104844189A (en) | 2015-08-19 |
Family
ID=53844236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510144922.4A Pending CN104844189A (en) | 2015-03-31 | 2015-03-31 | Preparation method for single phase chromium-containing magnesia-alumina spinel powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104844189A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107602109A (en) * | 2017-05-04 | 2018-01-19 | 武汉理工大学 | A kind of Cr3+Adulterate rich magnalium aluminate fluorescent transparent ceramics and preparation method thereof |
| CN112358288A (en) * | 2020-11-27 | 2021-02-12 | 武汉科技大学 | Forsterite-spinel ceramic based on high-carbon ferrochrome slag and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101066876A (en) * | 2007-06-13 | 2007-11-07 | 潘国明 | Process of producing high grade refractory material with alumina-chrome slag |
| CN103922763A (en) * | 2014-03-19 | 2014-07-16 | 锦州集信高温材料有限公司 | Electric melting magnesium-aluminum-chromium synthesis material and production method thereof |
| CN103936434A (en) * | 2014-03-24 | 2014-07-23 | 上海大学 | Al2O3-Cr2O3-MgO firebrick |
-
2015
- 2015-03-31 CN CN201510144922.4A patent/CN104844189A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101066876A (en) * | 2007-06-13 | 2007-11-07 | 潘国明 | Process of producing high grade refractory material with alumina-chrome slag |
| CN103922763A (en) * | 2014-03-19 | 2014-07-16 | 锦州集信高温材料有限公司 | Electric melting magnesium-aluminum-chromium synthesis material and production method thereof |
| CN103936434A (en) * | 2014-03-24 | 2014-07-23 | 上海大学 | Al2O3-Cr2O3-MgO firebrick |
Non-Patent Citations (1)
| Title |
|---|
| 杨德安等: "利用高碱铝铬渣合成镁铝铬尖晶石", 《硅酸盐通报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107602109A (en) * | 2017-05-04 | 2018-01-19 | 武汉理工大学 | A kind of Cr3+Adulterate rich magnalium aluminate fluorescent transparent ceramics and preparation method thereof |
| CN107602109B (en) * | 2017-05-04 | 2021-01-26 | 武汉理工大学 | Cr (chromium)3+Doped aluminum-magnesium-rich spinel fluorescent transparent ceramic and preparation method thereof |
| CN112358288A (en) * | 2020-11-27 | 2021-02-12 | 武汉科技大学 | Forsterite-spinel ceramic based on high-carbon ferrochrome slag and preparation method thereof |
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Application publication date: 20150819 |
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