CN103964869A - Preparation technology of dolomite sand - Google Patents
Preparation technology of dolomite sand Download PDFInfo
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- CN103964869A CN103964869A CN201410185515.3A CN201410185515A CN103964869A CN 103964869 A CN103964869 A CN 103964869A CN 201410185515 A CN201410185515 A CN 201410185515A CN 103964869 A CN103964869 A CN 103964869A
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- dolomite
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Abstract
The invention provides a preparation technology of dolomite sand, which comprises the following steps: (1) dolomite with the particle size of 10-80 mm is selected, wherein the dolomite comprises the following chemical components in parts by weight: larger than or equal to 0.29 part of SiO2, larger than or equal to 0.1 part of Fe2O3, larger than or equal to 0.15 part of Al2O3, larger than or equal to 30.06 parts of CaO, and larger than or equal to 22.7 parts of MgO, in addition, the dolomite is cut down for 40-50 according to the circumference, (2) low-ash hard coal is adopted as fuels to be calcinated in a high temperature shaft kiln, wherein the calcinating temperature is 1,750-1,850 DEG C; an intermittent oxygen-enriched calcination way is adopted, wherein one-time drawing out of the kiln is carried out in calcinating for 4-6 hours, and the times of entering in and drawing out of the kiln is 4-6; (3) the calcinated dolomite sand comprises the chemical components in parts by weight: 1.11-1.18 parts of SiO2, 0.56-0.6 part of Fe2O3, 0.45-0.64 part of Al2O3, 56.94-57.67 parts of CaO, and 39.93-40.21 parts of MgO, in addition, the calcinated dolomite sand is cut down for 0.28-0.43 according to the circumference, and has volume density of higher than or equal to 3.2. The dolomite sand is manufactured by one-step calcinating, and on one hand, the consumption of raw materials and fuels are enabled to be remarkably reduced, on the other hand, the preparation technology is greatly simplified, therefore, the production cost is lowered greatly.
Description
Technical field
The preparation technology who the present invention relates to dolomite sand, belongs to technical field of refractory materials.
Background technology
Dolomite sand be steel-making industry in refining steel as the raw material of VOD, the necessary refractory product of AOD stove.The preparation technology of existing dolomite sand adopts two step calcining manners conventionally, and its preparation process is numerous and diverse, and because the consumption of preparation process Raw is many, fuel consumption is also many in addition, therefore causes production cost very high.
Summary of the invention
For above deficiency, the object of this invention is to provide a kind of preparation technology of dolomite sand.
Technical scheme of the present invention: the preparation technology of dolomite sand, adopts following steps:
(1) choose the rhombspar that granularity is 10-80mm, and the index of this rhombspar according to the weight part of chemical composition is: SiO
2≤ 0.29, Fe
2o
3≤ 0.1, Al
2o
3≤ 0.15, CaO≤30.06, MgO≤22.7,40-50 cuts down according to the circumstance;
(2) adopt the anthracite of low ashes to calcine as the high temperature vertical kiln of fuel, calcining temperature is 1750-1850 DEG C, adopts the rich oxidizing roasting of intermittent type, and calcining goes out one time kiln for 4-6 hour, and turnover kiln number of times is 4-6 time;
(3) index of the dolomite sand after calcining according to the weight part of chemical composition is: SiO
21.11-1.18, Fe
2o
30.56-0.6, Al
2o
30.45-0.64, CaO 56.94-57.67, MgO 39.93-40.21, the 0.28-0.43 that cuts down according to the circumstance, Ti Mi≤3.2.
Beneficial effect of the present invention: make because the present invention adopts one-step calcination, on the one hand raw material and fuel consumption are obviously reduced, greatly simplified on the other hand preparation technology; Oxygen-enriched sintering is that the supply of oxygen is greater than burning of coal and needs amount of oxygen, and the present invention, by adopt oxygen-enriched sintering in one-step calcination process, makes dolomite sand surface form oxide film, is difficult for aquation; In sum, utilize dolomite sand prepared by this technique in reducing costs, simplifying technique, to reach the needed standard of producing completely, this preparation technology's high-quality, efficient.
Embodiment
embodiment mono-
The preparation technology of dolomite sand, adopts following steps:
(1) choose the rhombspar that granularity is 10-80mm, and the index of this rhombspar according to the weight part of chemical composition is: SiO
20.29, Fe
2o
30.1, Al
2o
30.15, CaO30.06, MgO22.7, cuts down according to the circumstance 46.7;
(2) adopt the anthracite of low ashes to calcine as the high temperature vertical kiln of fuel, calcining temperature is 1750 DEG C, adopts the rich oxidizing roasting of intermittent type, calcines and within 4 hours, goes out kiln one time, and turnover kiln number of times is 6 times;
(3) index of the dolomite sand after calcining according to the weight part of chemical composition is: SiO
21.11, Fe
2o
30.56, Al
2o
30.45, CaO 56.94, MgO 39.93, cuts down according to the circumstance 0.28, body close 3.2.
embodiment bis-
The preparation technology of dolomite sand, adopts following steps:
(1) choose the rhombspar that granularity is 10-80mm, and the index of this rhombspar according to the weight part of chemical composition is: SiO
20.34, Fe
2o
30.18, Al
2o
30.21, CaO32.14, MgO23.6, cuts down according to the circumstance 43.53;
(2) adopt the anthracite of low ashes to calcine as the high temperature vertical kiln of fuel, calcining temperature is 1850 DEG C, adopts the rich oxidizing roasting of intermittent type, calcines and within 6 hours, goes out kiln one time, and turnover kiln number of times is 4 times;
(3) index of the dolomite sand after calcining according to the weight part of chemical composition is: SiO
21.13, Fe
2o
30.58, Al
2o
30.61, CaO 57.22, MgO 40.08, cuts down according to the circumstance 0.38, body close 3.4.
embodiment tri-
The preparation technology of dolomite sand, adopts following steps:
(1) choose the rhombspar that granularity is 10-80mm, and the index of this rhombspar according to the weight part of chemical composition is: SiO
20.29, Fe
2o
30.1, Al
2o
30.15, CaO30.06, MgO22.7, cuts down according to the circumstance 46.7;
(2) adopt the anthracite of low ashes to calcine as the high temperature vertical kiln of fuel, calcining temperature is 1800 DEG C, adopts the rich oxidizing roasting of intermittent type, calcines and within 5 hours, goes out kiln one time, and turnover kiln number of times is 5 times;
(3) index of the dolomite sand after calcining according to the weight part of chemical composition is: SiO
21.18, Fe
2o
30.6, Al
2o
30.64, CaO 57.67, MgO 40.21, cuts down according to the circumstance 0.43, body close 3.25.
Claims (1)
1. the preparation technology of dolomite sand, is characterized in that adopting following steps:
(1) choose the rhombspar that granularity is 10-80mm, and the index of this rhombspar according to the weight part of chemical composition is: SiO
2≤ 0.29, Fe
2o
3≤ 0.1, Al
2o
3≤ 0.15, CaO≤30.06, MgO≤22.7,40-50 cuts down according to the circumstance;
(2) adopt the anthracite of low ashes to calcine as the high temperature vertical kiln of fuel, calcining temperature is 1750-1850 DEG C, adopts the rich oxidizing roasting of intermittent type, and calcining goes out one time kiln for 4-6 hour, and turnover kiln number of times is 4-6 time;
(3) index of the dolomite sand after calcining according to the weight part of chemical composition is: SiO
21.11-1.18, Fe
2o
30.56-0.6, Al
2o
30.45-0.64, CaO 56.94-57.67, MgO 39.93-40.21, the 0.28-0.43 that cuts down according to the circumstance, Ti Mi≤3.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410185515.3A CN103964869B (en) | 2014-05-05 | 2014-05-05 | The preparation technology of dolomite sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410185515.3A CN103964869B (en) | 2014-05-05 | 2014-05-05 | The preparation technology of dolomite sand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103964869A true CN103964869A (en) | 2014-08-06 |
| CN103964869B CN103964869B (en) | 2015-10-21 |
Family
ID=51234933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410185515.3A Active CN103964869B (en) | 2014-05-05 | 2014-05-05 | The preparation technology of dolomite sand |
Country Status (1)
| Country | Link |
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| CN (1) | CN103964869B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107814562A (en) * | 2017-10-11 | 2018-03-20 | 马鞍山豹龙新型建材有限公司 | A kind of production method of the composite modified aluminium-magnesia carbon brick of organosilicon and dolomite |
| CN108911534A (en) * | 2018-07-09 | 2018-11-30 | 武汉科技大学 | A kind of preparation method of activity dolomite sand |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995031412A1 (en) * | 1994-05-16 | 1995-11-23 | Deutsche Rockwool Mineralwoll-Gmbh | Process for producing mineral fibres |
| CN101691294A (en) * | 2009-10-01 | 2010-04-07 | 中钢集团洛阳耐火材料研究院有限公司 | Process for preparing hydration-resistance high-calcium magnesia-calcium sand |
| CN103058677A (en) * | 2012-12-27 | 2013-04-24 | 浙江金磊高温材料股份有限公司 | High-purity Mg-Ca sand and preparation method thereof |
-
2014
- 2014-05-05 CN CN201410185515.3A patent/CN103964869B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995031412A1 (en) * | 1994-05-16 | 1995-11-23 | Deutsche Rockwool Mineralwoll-Gmbh | Process for producing mineral fibres |
| CN101691294A (en) * | 2009-10-01 | 2010-04-07 | 中钢集团洛阳耐火材料研究院有限公司 | Process for preparing hydration-resistance high-calcium magnesia-calcium sand |
| CN103058677A (en) * | 2012-12-27 | 2013-04-24 | 浙江金磊高温材料股份有限公司 | High-purity Mg-Ca sand and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 宋鹏涛等: "白云石质煤矸石的烧结及其熟料的抗水化性", 《耐火材料》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107814562A (en) * | 2017-10-11 | 2018-03-20 | 马鞍山豹龙新型建材有限公司 | A kind of production method of the composite modified aluminium-magnesia carbon brick of organosilicon and dolomite |
| CN108911534A (en) * | 2018-07-09 | 2018-11-30 | 武汉科技大学 | A kind of preparation method of activity dolomite sand |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103964869B (en) | 2015-10-21 |
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