CN1321894C - Comprehensive method of utilizing magnesium smelting afterheat in producing magnesia and calcium carbonate - Google Patents
Comprehensive method of utilizing magnesium smelting afterheat in producing magnesia and calcium carbonate Download PDFInfo
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- CN1321894C CN1321894C CNB200510018019XA CN200510018019A CN1321894C CN 1321894 C CN1321894 C CN 1321894C CN B200510018019X A CNB200510018019X A CN B200510018019XA CN 200510018019 A CN200510018019 A CN 200510018019A CN 1321894 C CN1321894 C CN 1321894C
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Abstract
The present invention discloses a method comprehensively utilizing the residual heat of magnesium smelting for producing magnesium oxide and calcium carbonate, which makes the residual heat of a reduction furnace introduced to a vertical kiln for burning calcining white. Meanwhile, the method generates carbon dioxide. The calcining white is sent to a digestion classifying pool for processing, and the carbon dioxide enters a compressor after introduced into a secondary water circulation filter for purification. Raw materials after classifying processing are sent to a normal pressure carbonization pool for carbonization, and are sent to a carbonization tower for pressurization and carbonization through an intermediate pool. All the carbon dioxide for the carbonization is from the compressor. Heavy magnesium water generated after the carbonization, and calcium carbonate mixed liquor are sent to a filter press so as to separate the heavy magnesium water and the rough calcium carbonate. Alkali magnesium carbonate and hot waste magnesium water are separated from the heavy magnesium water by the filter press. The alkali magnesium carbonate and the rough calcium carbonate are sent to a rotary kiln for baking and light burning so as to obtain magnesium oxide and calcium carbonate. The present invention utilizes the characteristics and the advantages of a carbonization method for producing magnesium oxide to make up the defects of the production technology of a leather river method for producing magnesium oxide. Thus, the two technologies both enter an economical and environmental protection type row. Therefore, the present invention has higher economic and social benefits.
Description
Technical field
The present invention relates to the utilization of using residual heat from kiln furnace, particularly a kind of method that fully utilizes magnesium smelting afterheat in producing magnesia and lime carbonate.
Background technology
Existing production of magnesium by pidgeonprocess technology, its main method is, 1. with shaft kiln or rotation kiln between 950-1200 ℃, rhombspar is fired into forge white, 2. will forge the balling-up of the broken batching post-treatment of white powder, put into jar, carry out reduction decomposition, obtain crude magnesium through between inherent 1100-1250 ℃ of the reduction furnace; Existing carborization is produced magnesium oxide and its method of lime carbonate technology is: forging of 1. shaft kiln being burnt out is white, directly send the digestion grading pool to and digest classification through water, 2. will digest raw material after the classification send into normal pressure carbonization pond through the carbonization of high concentration carbon dioxide gas after carbonating tower pressurization carbonization is sent into after handling in middle pond, be pressed into high concentration carbon dioxide gas with compressor during the pressurization carbonization, to form heavy magnesium water and rough lime carbonate after the press filtration of raw material usefulness pressure filter after the pressurization carbonization, 3. heavy magnesium water being sent into the pyrolysis pond adds high concentration carbon dioxide gas simultaneously and carries out thermolysis, decompose the heavy magnesium water that obtains and form useless magnesium water of heat and magnesium basic carbonate through the pressure filter press filtration, 4. the useless magnesium water of above-mentioned heat is turned back to the digestion grading pool and digest classification once more, simultaneously magnesium basic carbonate and rough lime carbonate are sent into rotary kiln and carried out light-burned and oven dry, obtain light magnesium oxide and light calcium carbonate at last.From two kinds of magnesium refining methods as can be seen, Pidgeon process exists the shortcoming of heat energy serious waste, and carborization can be produced lime carbonate in refining magnesium, but will expend a large amount of carbon dioxides; I be the waste heat that utilizes a plurality of reduction furnaces at the utility model patent of first to file through collect fiery chamber introduce a shaft kiln fire forge white, each reduction furnace is not more than 15 meters to the distance of shaft kiln, be provided with a secondary water circulating filter pond on the shaft kiln side, the carbonic acid gas that flue gas body road is discharged purifies, and makes it thoroughly to be utilized in carborization production magnesium oxide and reclaim.
In sum, present various magnesium refining methods all also exist different problems, and up to the present variety of issue is gone back the none reasonable and effective method and overcome, and magnesium smelting afterheat waste gas is rationally utilized, and reduce production costs, and improve comprehensive benefit.
Summary of the invention
The purpose of this invention is to provide a kind of waste heat waste gas that effectively utilizes, the comprehensive utilization magnesium smelting afterheat in producing magnesia that greatly reduces production costs and the method for lime carbonate.
The method of comprehensive utilization magnesium smelting afterheat in producing magnesia and lime carbonate is: 1. the waste heat of a plurality of reduction furnaces is introduced a fiery chamber of collection through quirk and enter shaft kiln again, it is white to keep the interior temperature of shaft kiln between 1000-1200 ℃ the rhombspar deletion to be sintered into, and produces great amount of carbon dioxide simultaneously; 2. forge to give for free and handle what fire in the shaft kiln into the digestion grading pool, simultaneously shaft kiln being fired the carbonic acid gas of forging after white introduces through flue and enters compressor after secondary water circulating filter device purifies, 3. the liquid starting material after the stage treatment is sent into normal pressure carbonization pond and carried out carbonizing treatment, the high concentration carbon dioxide gas that carbonizing treatment is used is to introduce from compressor, liquid starting material after the normal pressure carbonizing treatment is sent into the carbonating tower carbonizing treatment of pressurizeing again through middle pond, the high concentration carbon dioxide gas that raw material pressurization carbonizing treatment is used also is from compressor, 4. the raw material after the pressurization carbonizing treatment generates heavy magnesium water and lime carbonate mixed solution, again it is sent into pressure filter and isolate heavy magnesium water and rough lime carbonate, 5. heavy magnesium water is produced magnesium basic carbonate and the useless magnesium water of heat through pressure filter, 6. magnesium basic carbonate and rough lime carbonate are sent into rotary kiln oven dry and light-burned respectively, obtain light magnesium oxide and lime carbonate, simultaneously the useless magnesium water of heat is returned the digestion grading pool again and handle once more.
The present invention utilizes carborization to produce the defective that magnesian characteristics and advantage remedy the production of magnesium by pidgeonprocess production technique, it is economical and practical that both sides are obtained, solved the defective that is produced in the technology separately again, two technologies have all been entered in saving type, the environment-friendly type ranks, have high economic benefit and social benefit.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
The combined process schema further describes embodiments of the invention: the first step of the present invention is that the waste heat of a plurality of reduction furnaces is introduced a fiery chamber of collection nearby through quirk, introduce again and fire rhombspar in the shaft kiln, each reduction furnace is not more than 15 meters apart from the distance of shaft kiln, guarantee that temperature remains between 1000-1200 ℃ in shaft kiln, with rhombspar be fired into forge white, second step was shaft kiln to be burnt forging of give for free into the classification of digestion grading pool, and the great amount of carbon dioxide gas that shaft kiln is discharged is introduced a secondary water circulating filter device through flue and lowered the temperature that to enter compressor compresses standby for high concentration carbon dioxide gas that removal of impurities collects purification simultaneously.The 3rd step was digestion fractionated liquid starting material to be sent into normal pressure carbonization pond carry out the normal pressure carbonizing treatment, two used vaporized carbons are to come from compressor, raw material after the normal pressure carbonizing treatment is sent into carbonating tower pressurization carbonization again after the degraded of middle pond, used carbonic acid gas is also from the compressor, the 4th step was that the heavy magnesium water that will generate in the carbonating tower and lime carbonate mixed solution are sent into pressure filter and isolated heavy magnesium water and rough lime carbonate, the 5th step was that heavy magnesium water is sent into the pyrolysis pond, introduce carbonic acid gas from compressor simultaneously, heavy magnesium water is carried out pyrolysis, the 6th step was that the heavy magnesium water after the pyrolysis is sent into the pressure filter press filtration, isolate the useless magnesium water of magnesium basic carbonate and heat, the 7th step was that magnesium basic carbonate and rough lime carbonate are sent into rotary kiln oven dry and light-burned respectively, obtain light magnesium oxide and lime carbonate, simultaneously the useless magnesium water of remaining heat is returned the digestion grading pool again and handle once more.
The method of this comprehensive utilization magnesium smelting afterheat in producing magnesia and lime carbonate is the reasonable butt joint of various traditional technology methods, makes the waste heat, the residual air that produce in the kiln obtain rationally utilizing fully, has great economic benefit and social benefit.
Claims (1)
1, the method for comprehensive utilization magnesium smelting afterheat in producing magnesia and lime carbonate, it is characterized in that: 1. the waste heat of a plurality of reduction furnaces is introduced a fiery chamber of collection through quirk and enter shaft kiln again, it is white to keep the interior temperature of shaft kiln between 1000-1200 ℃ dolomite calcination one-tenth to be forged, and produces great amount of carbon dioxide simultaneously; 2. forge to give for free and handle what fire in the shaft kiln into the digestion grading pool, simultaneously shaft kiln being fired the carbonic acid gas of forging after white introduces through flue and enters compressor after secondary water circulating filter device purifies, 3. the liquid starting material after the stage treatment is sent into normal pressure carbonization pond and carried out carbonizing treatment, the high concentration carbon dioxide gas that carbonizing treatment is used is to introduce from compressor, liquid starting material after the normal pressure carbonizing treatment is sent into the carbonating tower carbonizing treatment of pressurizeing again through middle pond, the high concentration carbon dioxide gas that raw material pressurization carbonizing treatment is used also is from compressor, 4. the raw material after the pressurization carbonizing treatment generates heavy magnesium water and lime carbonate mixed solution, again it is sent into pressure filter and isolate heavy magnesium water and rough lime carbonate, 5. heavy magnesium water is produced magnesium basic carbonate and the useless magnesium water of heat through pressure filter, 6. magnesium basic carbonate and rough lime carbonate are sent into rotary kiln oven dry and light-burned respectively, obtain light magnesium oxide and lime carbonate, simultaneously the useless magnesium water of heat is returned the digestion grading pool again and handle once more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510018019XA CN1321894C (en) | 2005-09-16 | 2005-09-16 | Comprehensive method of utilizing magnesium smelting afterheat in producing magnesia and calcium carbonate |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200510018019XA CN1321894C (en) | 2005-09-16 | 2005-09-16 | Comprehensive method of utilizing magnesium smelting afterheat in producing magnesia and calcium carbonate |
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| CN1772616A CN1772616A (en) | 2006-05-17 |
| CN1321894C true CN1321894C (en) | 2007-06-20 |
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| CNB200510018019XA Expired - Fee Related CN1321894C (en) | 2005-09-16 | 2005-09-16 | Comprehensive method of utilizing magnesium smelting afterheat in producing magnesia and calcium carbonate |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101648721B (en) * | 2009-08-31 | 2011-04-27 | 吉林大学 | Method for preparing nanometer magnesium oxide and active light calcium carbonate |
| CN101804998B (en) * | 2010-04-19 | 2012-05-30 | 湘西自治州矿产与新材料技术创新服务中心 | Method for producing high-purity magnesium oxide by using dolomite |
| CN102030488A (en) * | 2010-10-25 | 2011-04-27 | 中国科学院青海盐湖研究所 | Method for producing caustic dolomite used as raw material of magnesia cement from dolomite ore |
| CN102384662A (en) * | 2011-11-08 | 2012-03-21 | 大连易世达新能源发展股份有限公司 | Waste heat power generation device of magnesium oxide calcining rotary kiln |
| CN103738985A (en) * | 2013-11-27 | 2014-04-23 | 长春工业大学 | Simple nanometer magnesium oxide preparation method |
| CN104326498B (en) * | 2014-08-25 | 2017-01-18 | 凌庭生 | Device utilizing high-temperature flue gas with high CO2 content to produce ultrafine active calcium powder and production method thereof |
| CN107879647A (en) * | 2017-11-27 | 2018-04-06 | 湖南恒旺碳酸钙有限公司 | A kind of precipitated calcium carbonate husk combustion furnace heat supply and flue gas processing method and device |
| CN111348953A (en) * | 2020-04-07 | 2020-06-30 | 张建华 | Ammonium-potassium-magnesium phosphate environment-friendly slow-release fertilizer and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055718A (en) * | 1991-06-06 | 1991-10-30 | 邹凤祥 | The production method of magnesium oxide and lime carbonate |
| AU2474197A (en) * | 1996-06-05 | 1997-12-11 | Leon Eugene Pretorius | The production of calcium carbonate and of magnesium oxide from impure sources of calcium and magnesium |
| BRPI0403547A (en) * | 2004-08-09 | 2005-04-26 | Rima Agropecuaria Ltda | Magnesium production in pidgeon retorts using fuel gases from biomass carbonization |
-
2005
- 2005-09-16 CN CNB200510018019XA patent/CN1321894C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055718A (en) * | 1991-06-06 | 1991-10-30 | 邹凤祥 | The production method of magnesium oxide and lime carbonate |
| AU2474197A (en) * | 1996-06-05 | 1997-12-11 | Leon Eugene Pretorius | The production of calcium carbonate and of magnesium oxide from impure sources of calcium and magnesium |
| BRPI0403547A (en) * | 2004-08-09 | 2005-04-26 | Rima Agropecuaria Ltda | Magnesium production in pidgeon retorts using fuel gases from biomass carbonization |
Non-Patent Citations (1)
| Title |
|---|
| 白云石碳化法生产活性氧化镁新工艺 胡庆福等，无机盐工业，第36卷第6期 2004 * |
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