CN1150130A - Preparation of ultra-light magnesium oxide using blocky shepardite - Google Patents
Preparation of ultra-light magnesium oxide using blocky shepardite Download PDFInfo
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- CN1150130A CN1150130A CN 96107068 CN96107068A CN1150130A CN 1150130 A CN1150130 A CN 1150130A CN 96107068 CN96107068 CN 96107068 CN 96107068 A CN96107068 A CN 96107068A CN 1150130 A CN1150130 A CN 1150130A
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- magnesium oxide
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- carbonization
- shepardite
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Abstract
A process for preparing ultralight magnesium oxide with block brucite features that early-stage calcination and digestion steps are simplified and pressurized carbonization is used. Its advantages include high-effective component content in raw material, simplified process, high output rate and low cost.
Description
The present invention is the production method that belongs to a kind of extra light calcined magnesia.
Light magnesium oxide claims industrial magnesium oxide again, this is a kind of important chemical material, the powder that is white in color, therefore its light weight, high-purity, high reactivity are widely used in industry such as plastics, rubber, paint, paper, medicine, food, feed, enamel, fire-resistant and electronics and make filler or blended material.The method that prior art is produced light magnesium oxide according to different material mainly contains following four kinds: 1. bittern one soda ash method; 2. bittern one ammonium carbonate method; 3. magnesite--carborization; 4. rhombspar--carborization.Wherein more than 65% being the 4th kind is the feedstock production light magnesium oxide with the rhombspar.
The present invention seeks to adopt new mineral brucite is the feedstock production extra light calcined magnesia, thereby simplifies technology, reduces cost, and enhances productivity, and obtains ultralight, high-purity magnesium oxide product.
Feature of the present invention is:
(1) in the technical process, simplified the calcining and the digestion two-step in early stage, promptly the brucite raw material can directly enter the pressurization carbonation process, and then deironing, pyrolysis separate, oven dry, calcining make finished product;
Because the brucite iron level is higher, discover that content of magnesia increases in the bittern, iron level also increases thereupon, so the deironing requisite new process that is this technology;
(2) add CO in the anti-carbonization
2Dividing potential drop is controlled at 1.25--2.0MPa, and carbonization time is 30--60 minute, and carbonization temperature is 10--35 ℃;
(3) the pyrolysis separate mode of employing high-temperature steam;
(4) bake out temperature≤230 ℃;
(5) calcining temperature is 530--700 ℃;
(6) oxygenant of deironing employing is a clorox.
Advantage of the present invention:
1. save traditional calcining, digestion operation, thereby simplified technology, reduced facility investment.
2. brucite material effective component content is higher than three times of rhombspars, has saved material and surcharge thereof, has reduced cost.
3. MgO concentration is the 6--7 grams per liter only in the rhombspar carbonation process bittern, has limited production efficiency.Novel process adopts pressurization to force carbonization, has improved magnesian content in the heavy magnesium water greatly, has improved productive rate, has reduced energy consumption again.
Process characteristic of the present invention is represented in the accompanying drawings
Fig. 1 is a brucite--the pressurization carborization technological process of production
Fig. 2 is a rhombspar--the carborization technological process of production
Fig. 3 is two kinds of ore chemistry composition contrast tables
The embodiment of the invention
With brucite 200 orders, 30 grams, water 1000ml, 15 ℃ of carbonization temperatures, pressurization 1.25MPa, carbonization time 1 hour, by brucite effective ingredient 62%, carbonation rate is 77.97%, separates in 98 ℃ of following pyrolysis of vapor temperature again, can have 99.4% to be magnesium basic carbonate and to be precipitated out, enter in oven dry and the calcining process, slough crystal water during 215 ℃ of bake out temperatures, when further being warming up to 532 ℃ of beginning decarburizations, when temperature reaches 590 ℃, the CO in the magnesium basic carbonate
2And H
2O all emits, and forms light magnesium oxide.When the oven dry calcining materials had certain thickness, actual calcination temperature was greater than 590 ℃, between 600--700 ℃.
Claims (1)
1. the method for a preparation of ultra-light magnesium oxide using blocky shepardite is characterized in that:
(1) in the technical process, simplified the calcining and the digestion two-step in early stage, promptly the brucite raw material can directly enter the pressurization carbonation process, and then deironing, pyrolysis separate, oven dry, calcining make finished product;
(2) CO in the pressurization carbonization
2Dividing potential drop is controlled at 1.25--2.0Mpa, and carbonization time is 30--60 minute, and carbonization temperature is 10--35 ℃;
(3) the pyrolysis separate mode of employing high-temperature steam;
(4) bake out temperature≤230 ℃;
(5) calcining temperature is 530--700 ℃;
(6) oxygenant of deironing employing is a clorox.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96107068A CN1051748C (en) | 1996-07-15 | 1996-07-15 | Preparation of ultra-light magnesium oxide using blocky shepardite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96107068A CN1051748C (en) | 1996-07-15 | 1996-07-15 | Preparation of ultra-light magnesium oxide using blocky shepardite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1150130A true CN1150130A (en) | 1997-05-21 |
| CN1051748C CN1051748C (en) | 2000-04-26 |
Family
ID=5119507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96107068A Expired - Fee Related CN1051748C (en) | 1996-07-15 | 1996-07-15 | Preparation of ultra-light magnesium oxide using blocky shepardite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1051748C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514025B (en) * | 2009-02-16 | 2012-02-29 | 大连理工大学 | Method for preparing ultra pure magnesium oxide powder |
| CN101538419B (en) * | 2009-04-09 | 2012-07-04 | 池州灵芝化建材料科技有限公司 | Process for preparing brucite inorganic flame retardant |
| CN103074493A (en) * | 2013-02-20 | 2013-05-01 | 广西银亿科技矿冶有限公司 | Application of brucite to recovery of nickel cobalt |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86102539A (en) * | 1986-10-15 | 1988-04-27 | 上海敦煌化工厂 | The no waste liquid manufacture method of Magnesium Carbonate Light 41-45 |
| CN1037690A (en) * | 1988-05-16 | 1989-12-06 | 上海敦煌化工厂 | Method of fabricating magnesium oxide |
| CN1025180C (en) * | 1992-02-24 | 1994-06-29 | 西安地质学院科技开发公司 | Method for extracting magnesium oxide from serpentine |
| CN1076426A (en) * | 1992-03-14 | 1993-09-22 | 浙江农业大学 | A kind of novel method of from magnesia and bittern, extracting light magnesium oxide |
-
1996
- 1996-07-15 CN CN96107068A patent/CN1051748C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514025B (en) * | 2009-02-16 | 2012-02-29 | 大连理工大学 | Method for preparing ultra pure magnesium oxide powder |
| CN101538419B (en) * | 2009-04-09 | 2012-07-04 | 池州灵芝化建材料科技有限公司 | Process for preparing brucite inorganic flame retardant |
| CN103074493A (en) * | 2013-02-20 | 2013-05-01 | 广西银亿科技矿冶有限公司 | Application of brucite to recovery of nickel cobalt |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1051748C (en) | 2000-04-26 |
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