CN1865140A - Nemalite carbonization for preparing light magnesium carbonate and high purity magnesia - Google Patents
Nemalite carbonization for preparing light magnesium carbonate and high purity magnesia Download PDFInfo
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- CN1865140A CN1865140A CN 200510072496 CN200510072496A CN1865140A CN 1865140 A CN1865140 A CN 1865140A CN 200510072496 CN200510072496 CN 200510072496 CN 200510072496 A CN200510072496 A CN 200510072496A CN 1865140 A CN1865140 A CN 1865140A
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- water
- carbonization
- mgo
- magnesium
- magnesium carbonate
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- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 39
- 238000003763 carbonization Methods 0.000 title claims abstract description 27
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 title claims abstract description 19
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 title 1
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 28
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000011777 magnesium Substances 0.000 claims abstract description 23
- 229910052599 brucite Inorganic materials 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000000835 fiber Substances 0.000 claims abstract description 14
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 14
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000001354 calcination Methods 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims abstract description 7
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000008367 deionised water Substances 0.000 claims abstract description 4
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 claims description 6
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 239000012452 mother liquor Substances 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 3
- QWDJLDTYWNBUKE-UHFFFAOYSA-L magnesium bicarbonate Chemical compound [Mg+2].OC([O-])=O.OC([O-])=O QWDJLDTYWNBUKE-UHFFFAOYSA-L 0.000 claims description 3
- 239000002370 magnesium bicarbonate Substances 0.000 claims description 3
- 229910000022 magnesium bicarbonate Inorganic materials 0.000 claims description 3
- 235000014824 magnesium bicarbonate Nutrition 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 238000010298 pulverizing process Methods 0.000 claims 1
- 235000014380 magnesium carbonate Nutrition 0.000 abstract description 11
- 239000000047 product Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 abstract description 2
- 239000000706 filtrate Substances 0.000 abstract 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 8
- 239000002994 raw material Substances 0.000 description 8
- 235000017550 sodium carbonate Nutrition 0.000 description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 239000012267 brine Substances 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000010425 asbestos Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052620 chrysotile Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 150000002681 magnesium compounds Chemical class 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000606 toothpaste Substances 0.000 description 1
- 229940034610 toothpaste Drugs 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- CWBIFDGMOSWLRQ-UHFFFAOYSA-N trimagnesium;hydroxy(trioxido)silane;hydrate Chemical compound O.[Mg+2].[Mg+2].[Mg+2].O[Si]([O-])([O-])[O-].O[Si]([O-])([O-])[O-] CWBIFDGMOSWLRQ-UHFFFAOYSA-N 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
This invention discloses a method for producing lightweight magnesium carbonate and high-purity magnesium oxide by fibre brucite carbonization, comprising: a. disintegrate the fibre brucite, calcine at 500-600Deg C, add water to podzolizing, and send to the carbonization tower; b. CO2 enters the tower from the bottom, the pressure inside the tower is approximately 0.2-0.3Mpa, and the temperature is 25Deg C; c. after reaction matures, filtrate the heavy magnesium solution and heat it at 85-105Deg C to transform to basic magnesium carbonate; d. filtrate the solid basic magnesium carbonate, wash with deionized water, centrifuge to remove the water, and calcine in the rotary furnace at 600Deg C to produce the lightweight MgCO3; e. the MgCO3 can be transformed to high-purity MgO by calcining at 800-950Deg C, and after disintegration and product test, the product can be packed. The fibre brucite has little impurity and can produce MgO with 98.25% purity according to the said process.
Description
Technical Field
The invention relates to a production method of light magnesium carbonate and high-purity magnesium oxide, in particular to a method for preparing light magnesium carbonate and high-purity magnesium oxide by using a fiber brucite raw material.
Background
Light MgCO3Is an intermediate product for producing high-purity MgO, and the two are important raw materials in chemical industry and metallurgical industry. The current methods for producing MgO in China include a lime seawater method, a dolomite carbonization method, a magnesite soda ash method (ammonium bicarbonate method), a brine soda ash method and the like. These methods are either complicated in process or high in raw material cost. For example, 15-18 tons of brine and 3-3.5 tons of soda ash are needed for preparing one ton of MgO by using a brine soda ash method, and the cost for producing one ton of raw material is more than 8 thousand yuan.
Light MgCO3Is a raw material of rubber, printing ink, ceramics, glass, cosmetics, toothpaste, etc. The melting point of the high-purity MgO is 2800 ℃ and the boiling point is 3600 ℃, and the MgO is a refractory material widely used in the metallurgical industry. According to nothingThe organic salt industry reports that: "the U.S. consumes over 100 million tons of MgO per year, and the ratio of U.S. MgO production to steel production is 7 kg/ton steel. The content of MgO popular in the world market is more than 95 percent ". According to HG1-324-77 standard, the high-purity MgO contains 98-99% of MgO, and the active MgO contains MgO: the special grade contains 95 percent of MgO, the first grade contains 93 percent of MgO and the second grade contains 92 percent of MgO. Light MgCO3Special MgCO, also expressed in terms of MgO3Contains 41-45% of MgO and primary MgCO3Containing 41-45% of MgO and two-stage MgCO338-45% of MgO.
Survey of China non-metal mine industry (group) head office and geological sector: the asbestos mine in the southern Shaanxi province of Shaanxi province is the only mine enterprise for producing fiber brucite all over the world, and the proven storage capacity reaches 980 ten thousand tons. Is one of the 100 largest metal ore mining and selecting enterprises in China awarded by the State statistics Bureau. The asbestos mineral products mainly comprise three series of fibrobrucite, chrysotile and serpentine, wherein the fibrobrucite is taken as the main material, and the quality of the products is excellent. The enterprise has a history of 50 years, and no magnesium-making compound is found so far.
Disclosure of Invention
The invention aims to provide a method for preparing light magnesium carbonate and high-purity magnesium oxide by using fiber brucite as a raw material.
The technical scheme for realizing the purpose is as follows:
1. crushing fiber brucite, calcining at 500-600 deg.c to eliminate crystal water, adding water to incinerate, converting MgO into Mg (OH)2I.e. Mg (OH)2Sending the slurry into a carbonization tower for carbonization;
2、CO2after dust-removing and water-washing, the mixture enters from the bottom of a carbonization tower, the pressure in the carbonization tower is about 0.2-0.3Mpa, the temperature is 25 ℃, and Mg (OH) is added2Slurry in excess of CO2Conversion to Mg (HCO) under the action of3)2The magnesium bicarbonate is heavy magnesium water in liquid phase, and the fiber brucite in the carbonization tower is about 10 percent of water or mother liquor;
3. after the reaction is mature, heavy magnesium water is filtered out and heated to 85-105 ℃ to be converted into basic magnesium carbonate，MgCO33H2O or XMgO YMg (OH)2·ZH2O；
4. Filtering solid basic magnesium carbonate, washing with deionized water, centrifuging, dewatering, and calcining at 600 deg.Cin converter to obtain light MgCO3Testing and packaging the finished product;
5. light MgCO3Calcining at 950 ℃ under 800 ℃ to obtain high-purity MgO, crushing, testing and packaging the finished product;
as the fibrous brucite contains less impurities, the MgO with the purity of 98.25 percent can be produced according to the process. The carbonization of fibrous brucite is used to prepare high-purity MgO, which only uses fibrous brucite and its leftover bits and dregs and then uses the waste gas CO from lime kiln2The raw material cost is low when the carbonization is carried out in the carbonization tower.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
1. the brucite is crushed and calcined at 500-600 deg.c to lose crystal water and obtain calcine, which is incinerated in water to convert MgO into Mg (OH)2I.e. Mg (OH)2Sending the slurry into a carbonization tower for carbonization;
2. the carbonization tower is made of 6mm steel plates, the diameter is about 1.4 meters, the height is 6-7 meters, and the inside and the outside are protected by epoxy resin. Exhaust gas CO of lime kiln2The dust-removing and water-washing process is carried out, then the obtained product is fed from the bottom of the tower, the gas inlet main pipe is fed into the tower and is divided into 15-20 small nozzles, the nozzles are downward, the waste residue can not block the nozzles, the pressure in the carbonization tower is about 0.2-0.3Mpa (2-3at), and the temperature is 25 ℃; the cooling water pipe is added internally to reduce the temperature in summer;
3. the chemical reaction in the carbonization tower is Introducing excess CO2Then is The magnesium bicarbonate is heavy magnesium water in liquid phase. The fiber brucite in the carbonization tower is about 10 percent of water or mother liquor;
4. after the reaction is mature, the heavy magnesium water is filtered out, and the slag is separated so as to ensureThe high purity of the heavy magnesium water can be centrifugally filtered, the heavy magnesium water is heated to 85-105 ℃ and is converted into basic magnesium carbonate, the molecular formula is different due to different operating conditions, and the heavy magnesium water is often expressed as MgCO33H2O or XMgO YMg (OH)2·ZH2O；
5. Filtering out solid basic magnesium carbonate, feeding mother liquor containing 0.5g magnesium salt into a sand baking pool to prepare Mg (OH)2The slurry and the basic magnesium carbonate are washed by deionized water, centrifugally dewatered and calcined in a converter with the temperature of more than 600 ℃ to obtain the light MgCO3Testing and packaging the finished product;
6. light MgCO3CO decomposed by calcination at 800-950 DEG C2Sending into a carbonization tower to obtain high-purity MgO, crushing by using a jet mill according to the requirement, and testing and packaging the finished product;
slag discharged from the carbonization tower is a good refractory material and a good heat-insulating material and needs to be researched and utilized.
The MgO is produced according to the process, and the three wastes and the toxicity are avoided.
The invention uses fiber brucite as a new raw material for preparing MgO for the first time. In practice there may be parameters to improve. Currently, there are dozens of magnesium compounds produced, especially for the production of MgCO3And MgO has a great relationship with temperature and operating conditions, and parameters and operating processes need to be changed according to the requirements of users, so that the product is satisfied by the users.
Claims (1)
- A method for preparing light magnesium carbonate and high-purity magnesium oxide by a fiber brucite carbonization method is characterized by comprising the following steps:a. crushing fiber brucite, calcining at 500-600 deg.c to eliminate crystal water, adding water to incinerate, converting MgO into Mg (OH)2I.e. Mg (OH)2Sending the slurry into a carbonization tower for carbonization;b、CO2after dust-removing and water-washing, the mixture enters from the bottom of a carbonization tower, the pressure in the carbonization tower is about 0.2-0.3Mpa, the temperature is 25 ℃, and Mg (OH) is added2Slurry in excess of CO2Conversion to Mg (HCO) under the action of3)2In the carbonization tower, the magnesium bicarbonate is heavy magnesium water in liquid phaseThe inner fiber brucite is about 10% of water or mother liquor;c. filtering heavy magnesium water after the reaction is mature, heating the heavy magnesium water to 85-105 ℃ to convert the heavy magnesium water into basic magnesium carbonate MgCO33H2O or XMgO YMg (OH)2·ZH2O；d. Filtering solid basic magnesium carbonate, washing with deionized water, centrifuging, dewatering, and calcining at 600 deg.C in converter to obtain light MgCO3Testing andpackaging the finished product;e. light MgCO3Calcining at 950 deg.C under 800 deg.C to obtain high-purity MgO, pulverizing, testing and packaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510072496 CN1865140A (en) | 2005-05-19 | 2005-05-19 | Nemalite carbonization for preparing light magnesium carbonate and high purity magnesia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510072496 CN1865140A (en) | 2005-05-19 | 2005-05-19 | Nemalite carbonization for preparing light magnesium carbonate and high purity magnesia |
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| Publication Number | Publication Date |
|---|---|
| CN1865140A true CN1865140A (en) | 2006-11-22 |
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| CN 200510072496 Pending CN1865140A (en) | 2005-05-19 | 2005-05-19 | Nemalite carbonization for preparing light magnesium carbonate and high purity magnesia |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2372289C1 (en) * | 2008-03-11 | 2009-11-10 | Дмитрий Александрович Петухов | Method of producing magnesium oxide from talc-magnesite ore and talc tailings from talc-magnesite ore |
| CN103626211A (en) * | 2013-12-04 | 2014-03-12 | 沈阳化工大学 | Method for preparing heavy magnesium carbonate through heavy magnesium water |
| CN107285347A (en) * | 2017-08-17 | 2017-10-24 | 沈阳理工大学 | A kind of method that utilization magnesite prepares porous spherical basic carbonate magnesium crystal |
| CN109734108A (en) * | 2019-02-27 | 2019-05-10 | 杭州英普环境技术股份有限公司 | A kind of novel active magnesium bicarbonate production device effectively removing silicon compound in water |
| CN109790044A (en) * | 2016-07-27 | 2019-05-21 | 国家科学研究学院 | The magnesia of low-carbon emission produces |
| CN115124055A (en) * | 2022-07-18 | 2022-09-30 | 陕西天宝矿业有限公司 | A low-cost, high-efficiency and environment-friendly production process for light magnesium carbonate and light magnesium oxide |
| CN119263316A (en) * | 2024-12-12 | 2025-01-07 | 湖南镁基科技有限公司 | Active magnesium oxide and preparation method thereof |
-
2005
- 2005-05-19 CN CN 200510072496 patent/CN1865140A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2372289C1 (en) * | 2008-03-11 | 2009-11-10 | Дмитрий Александрович Петухов | Method of producing magnesium oxide from talc-magnesite ore and talc tailings from talc-magnesite ore |
| CN103626211A (en) * | 2013-12-04 | 2014-03-12 | 沈阳化工大学 | Method for preparing heavy magnesium carbonate through heavy magnesium water |
| CN109790044A (en) * | 2016-07-27 | 2019-05-21 | 国家科学研究学院 | The magnesia of low-carbon emission produces |
| CN107285347A (en) * | 2017-08-17 | 2017-10-24 | 沈阳理工大学 | A kind of method that utilization magnesite prepares porous spherical basic carbonate magnesium crystal |
| CN109734108A (en) * | 2019-02-27 | 2019-05-10 | 杭州英普环境技术股份有限公司 | A kind of novel active magnesium bicarbonate production device effectively removing silicon compound in water |
| CN115124055A (en) * | 2022-07-18 | 2022-09-30 | 陕西天宝矿业有限公司 | A low-cost, high-efficiency and environment-friendly production process for light magnesium carbonate and light magnesium oxide |
| CN119263316A (en) * | 2024-12-12 | 2025-01-07 | 湖南镁基科技有限公司 | Active magnesium oxide and preparation method thereof |
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