CN1051025A - Processing magnesite with transformation method - Google Patents
Processing magnesite with transformation method Download PDFInfo
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- CN1051025A CN1051025A CN 89108100 CN89108100A CN1051025A CN 1051025 A CN1051025 A CN 1051025A CN 89108100 CN89108100 CN 89108100 CN 89108100 A CN89108100 A CN 89108100A CN 1051025 A CN1051025 A CN 1051025A
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- ammonium
- transforming agent
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Abstract
The present invention is a manufacture method of directly producing high purity Magnesium Carbonate Light 41-45 or light magnesium oxide from magnesite.Magnesite at first leaches with ammonium class transforming agent behind calcining and activating, NH that produces in the production process or CO gas recovery recycle, or magnesite and ammonium class transforming agent mixed calcining, calcinate water extraction, NH that produces in the production process and CO recycling use.Using the present invention promptly to obtain high leaching rate, do not have waste gas and waste liquid again and discharge, is an operational path that obtains the high quality carbon hydrochlorate with low cost.
Description
The present invention is a manufacture method of producing Magnesium Carbonate Light 41-45 or light magnesium oxide with magnesite.
The method of producing Magnesium Carbonate Light 41-45 mainly contains with the rhombspar to be the carborization of raw material and to be the soda ash method of raw material with bittern.Carborization energy consumption height, unstable product quality; Soda ash method cost of material is expensive, the product cost height.All need to be improved for this reason.Chinese patent application 86102539 has been mentioned the example that utilizes ammonium sulfate directly to leach magnesite, but its leaching rate less than 7%, no industrial value still need improve.
The present invention is directed to the shortcoming of above method, propose the processing method that a kind of processing magnesite with transformation method is produced Magnesium Carbonate Light 41-45 or light magnesium oxide.
What the present invention taked is following operational path:
Route one: magnesite obtains the magnesite breeze through pulverizing, even with ammonium class transforming agent with 1: 1～8 mixed, carried out conversion reaction in 10 minutes to 3 hours at 400～800 ℃ temperature lower calcinations, gas-phase product NH that produces during reaction and CO reclaim and obtain ammonium bicarbonate soln, the calcinate cooling is after water extraction obtains magnesium salt solution after filtering, add the ammonium bicarbonate soln that reclaims then and carry out precipitin reaction as precipitation agent, reaction generates the magnesiumcarbonate precipitation, restore ammonium class transforming agent simultaneously, filtering rear filtrate is that the transforming agent recovery follows also use, filter cake is a magnesiumcarbonate, again through washing, filter, dried making promptly obtains the Magnesium Carbonate Light 41-45 product; If this Magnesium Carbonate Light 41-45 is calcined, can obtain light magnesium oxide under 800 ℃ temperature.
Route two: magnesite is pulverized and is made the magnesite breeze, under 600～900 ℃ temperature, carried out calcining and activating 0.5～3 hour, the living CO of generation obtains bicarbonate of ammonia with the ammoniacal liquor absorption of the conversion reaction operation recovery of postorder during calcining and activating, magnesite breeze after the activation and ammonium class transforming agent carry out conversion reaction with 1: 1～5 ratio under the boiling temperature in liquid phase, the NH that produces reclaims and obtains ammoniacal liquor, remove impurity after the filtration and obtain magnesium salt solution, the ammonium bicarbonate soln that the step reclaims before adding carries out precipitin reaction as precipitation agent, the reaction back generates the magnesiumcarbonate precipitation, restore ammonium class transforming agent simultaneously, filtering rear filtrate is the transforming agent that restores, recyclable following also used, and filter cake is that magnesiumcarbonate is again through washing, be drying to obtain the Magnesium Carbonate Light 41-45 product; If this Magnesium Carbonate Light 41-45 800 ℃ of calcinings down, can be obtained the light magnesium oxide product.
The used ammonium class transforming agent of the present invention can be ammonium sulfate, ammonium chloride, ammonium nitrate.The reaction of they and magnesite generates the magnesium salts of corresponding acid when conversion reaction.For example, when being transforming agent, generate sal epsom after the conversion reaction, emit ammonia (recovery) simultaneously with ammonium sulfate.The magnesium salts of respective acids and bicarbonate of ammonia carry out precipitin reaction, restore the ammonium salt of respective acids again obtaining the sedimentary while of magnesiumcarbonate.For example, sal epsom and bicarbonate of ammonia react, and obtain the magnesiumcarbonate precipitation, also restore simultaneously ammonium sulfate.Theoretically, the used ammonium class transforming agent of the present invention is nonexpendable under processing condition of the present invention.
The used precipitation agent bicarbonate of ammonia of the present invention is mainly derived from the by product that reclaims in the technological process of the present invention, should satisfy needs of the present invention by reclaiming theoretically, because of its mechanical loss, so in fact will suitably replenish.The consumption of bicarbonate of ammonia is generally theoretical amount and gets final product.
Fully implement the present invention, will cut down the consumption of raw materials significantly, can decide as required and produce Magnesium Carbonate Light 41-45 or light magnesium oxide.Transformation efficiency of the present invention and crystallization yield are respectively more than 90% and 80%.
Example 1
100g(contains MgO44.21% with the magnesite breeze) at 900 ℃ of calcining and activatings hour, carbonic acid gas in the tail gas absorbs with ammoniacal liquor (deriving from the vapor condensation thing of the conversion reaction recovery of back) in the absorption tower, obtain ammonium bicarbonate soln, then calcined material and 193g ammonium sulfate were carried out conversion reaction 200 minutes in 635ml water under boiling Wen Du, the gas-phase product condensation recovery that generates is obtained ammoniacal liquor, transformation efficiency 97%, filter cleaner gets Adlerika, with 876ml concentration be that 21% ammonium bicarbonate soln carries out precipitin reaction, get the Magnesium Carbonate Light 41-45 slurries, after the filtration, the filter cake washing drying obtains Magnesium Carbonate Light 41-45, filtrate is ammoniumsulphate soln, and recyclable following also used; If Magnesium Carbonate Light 41-45 is promptly obtained the light magnesium oxide product 800 ℃ of following calcinings.
Example 2
With example 1 identical operations, employing ammonium nitrate is transforming agent, and its transformation efficiency is 90%, and crystallization yield is 80%.
Example 3
With example 1 identical operations, be transforming agent with ammonium chloride, its transformation efficiency is 92%, crystallization yield is 80%.
Example 4
With example 1 difference be that transforming agent is to return use with the ammonium sulfate that reclaims after the Crystallization Separation, gained is transformation efficiency 95% as a result, crystallization yield 80%.
Example 5
The 100g breeze is mixed with transforming agent ammonium sulfate 158g, the thing that will be mixed is 800 ℃ of calcinings down, the tail gas water absorbs and obtains ammonium bicarbonate soln 230ml, calcine and get with shrend after 1 hour, remove a small amount of residue after filtration and get Adlerika, the 230ml ammonium bicarbonate soln is added 50g bicarbonate of ammonia and Adlerika and is carried out precipitin reaction and get Magnesium Carbonate Light 41-45 solution, washs dry 89g finished light magnesiumcarbonate after filtration, calcine again light magnesium oxide.
Claims (3)
1, a kind of method of making Magnesium Carbonate Light 41-45 or light magnesium oxide, it is characterized in that magnesite and ammonium class transforming agent are with 1: 1～8 ratio thorough mixing, calcining was carried out conversion reaction 10 minutes to 3 hours under 400～800 ℃, NH that reaction produces and CO reclaim and obtain ammonium bicarbonate soln, the calcinate water extraction, filter, the ammonium bicarbonate soln that adds theoretical amount then carries out precipitin reaction, filter then, filtrate being restored the ammonium class transforming agent recovery that and followed also use, filter cake is through washing, dried making, or calcining under 800 ℃ again.
2, a kind of method of making Magnesium Carbonate Light 41-45 or fosterization of lightweight magnesium, it is characterized in that the magnesite breeze was 600～900 ℃ of following calcining and activatings 0.5～3 hour, the ammoniacal liquor that reclaims during simultaneously with the postorder conversion reaction absorbs the CO that emits, in liquid phase, carry out conversion reaction with ammonium class transforming agent under the boiling temperature with 1: 1～5 ratio again, the NH that recovery is emitted, filter cleaner, the ammonium bicarbonate soln that adds theoretical amount in the filtrate carries out precipitin reaction, filter then, filtrate being restored the ammonium class transforming agent recovery that and followed also use, filter cake is through washing dried making, or again 800 ℃ of calcinings down.
3, a kind of according to claim 1 and 2 said methods, it is characterized in that said ammonium class transforming agent is an ammonium sulfate, ammonium chloride, ammonium nitrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89108100 CN1051025A (en) | 1989-10-19 | 1989-10-19 | Processing magnesite with transformation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89108100 CN1051025A (en) | 1989-10-19 | 1989-10-19 | Processing magnesite with transformation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1051025A true CN1051025A (en) | 1991-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89108100 Pending CN1051025A (en) | 1989-10-19 | 1989-10-19 | Processing magnesite with transformation method |
Country Status (1)
| Country | Link |
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| CN (1) | CN1051025A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103011630A (en) * | 2012-12-26 | 2013-04-03 | 新疆蓝天镁业股份有限公司 | Method of producing high-purity magnesium hydroxide and magnesium oxide by low-grade magnesite |
| CN103241751A (en) * | 2013-04-27 | 2013-08-14 | 陕西师范大学 | Preparation method for high-purity magnesium oxide |
-
1989
- 1989-10-19 CN CN 89108100 patent/CN1051025A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103011630A (en) * | 2012-12-26 | 2013-04-03 | 新疆蓝天镁业股份有限公司 | Method of producing high-purity magnesium hydroxide and magnesium oxide by low-grade magnesite |
| CN103011630B (en) * | 2012-12-26 | 2015-09-09 | 新疆蓝天镁业股份有限公司 | Low-grade magnesite produces high purity magnesium hydroxide and method of magnesium oxide |
| CN103241751A (en) * | 2013-04-27 | 2013-08-14 | 陕西师范大学 | Preparation method for high-purity magnesium oxide |
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