CN1051748C - 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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- CN1051748C CN1051748C CN96107068A CN96107068A CN1051748C CN 1051748 C CN1051748 C CN 1051748C CN 96107068 A CN96107068 A CN 96107068A CN 96107068 A CN96107068 A CN 96107068A CN 1051748 C CN1051748 C CN 1051748C
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- carbonization
- magnesium oxide
- brucite
- blocky
- calcining
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Abstract
The present invention relates to a method for preparing magnesium oxide by blocky brucite. The calcining and digestion process in the early period is simplified, and the pressurizing carbonization step is used. The present invention has the advantages of high active ingredient content of raw material, simplified working procedure, high yield of the pressurizing carbonization method and cost reduction.
Description
The present invention belongs to a kind of magnesian production method.
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-soda ash method; 2. bittern-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 light magnesium oxide, thereby simplifies technology, reduces cost, and enhances productivity.
Technical scheme of the present invention is:
With the brucite raw material pressurize that carbonization, deironing, pyrolysis separate, oven dry, calcining;
CO in the carbonization wherein pressurizes
2Dividing potential drop is controlled at 1.25～2.0MPa, and carbonization time is 30～60 minutes, and carbonization temperature is 10～35 ℃; Adopting steam to carry out pyrolysis separates; Bake out temperature≤230 ℃; Calcining temperature is 530～700 ℃; Because the brucite iron level is higher, discover that content of magnesia increases in the bittern, iron level also increases thereupon, so must carry out deironing, the oxygenant that deironing is adopted 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 6～7 grams per liters 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.
Fig. 1 is technical process of the present invention, the brucite-pressurization carborization technological process of production
Fig. 2 is the technical process of prior art, the rhombspar-carborization technological process of production
Embodiment 1
With brucite 200 orders, 30 grams, water 1000ml, 15 ℃ of carbonization temperatures, pressurization 1.25MPa, carbonization time 1 hour, by brucite effective constituent 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 warmed 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 calcining temperature was greater than 590 ℃, between 600～700 ℃.
Claims (1)
1. a block brucite prepares method of magnesium oxide, be with the brucite raw material pressurize that carbonization, deironing, pyrolysis separate, oven dry, calcining, it is characterized in that:
(1) CO in the pressurization carbonization
2Dividing potential drop is controlled at 1.25～2.0MPa, and carbonization time is 30～60 minutes, and carbonization temperature is 10～35 ℃;
(2) adopting steam to carry out pyrolysis separates;
(3) bake out temperature≤230 ℃;
(4) calcining temperature is 530～700 ℃;
(5) 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 CN1150130A (en) | 1997-05-21 |
| CN1051748C true CN1051748C (en) | 2000-04-26 |
Family
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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 |
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| CN (1) | CN1051748C (en) |
Families Citing this family (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 |
Citations (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 |
| CN1075936A (en) * | 1992-02-24 | 1993-09-08 | 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
Patent Citations (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 |
| CN1075936A (en) * | 1992-02-24 | 1993-09-08 | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1150130A (en) | 1997-05-21 |
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