CN1193955C - Process for preparing high-purity magnesite product series from boron contained mud - Google Patents
Process for preparing high-purity magnesite product series from boron contained mud Download PDFInfo
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- CN1193955C CN1193955C CNB011189169A CN01118916A CN1193955C CN 1193955 C CN1193955 C CN 1193955C CN B011189169 A CNB011189169 A CN B011189169A CN 01118916 A CN01118916 A CN 01118916A CN 1193955 C CN1193955 C CN 1193955C
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- boron mud
- magnesiumcarbonate
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- scavenging agent
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/005—Lime, magnesia or dolomite obtained from an industrial by-product
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The present invention belongs to an industrial production method for comprehensively utilizing industrial waste, namely boric sludge to produce high-purity magnesite line products. Boric sludge which is used as non-metallic mineral raw materials is treated by soft burning, the introduction of carbon dioxide, mixing, pressurization and filtration, and products of all temperature sections can be obtained by temperature control. Accordingly, a primary product, namely transparent magnesium carbonate of which the purity reaches 99.2% to 99.8%, an intermediate product, namely magnesium oxide of which the purity reaches 99.2% to 99.8% respectively, and a final product, namely high-purity magnesite of which the purity reaches 99.0% to 99.5% can be obtained. Moreover, the technology is simple, and no catalyst is added.
Description
The invention belongs to the industrial process of comprehensive utilization industrial residue preparing high-purity magnesite product series from boron contained mud.
Chinese patent CN1222485A discloses be entitled as " utilizing boric sludge to get the method for Magnesium Carbonate Light 41-45 " of people such as Li Zhitao, this method just is limited to the lab scale preparation method at 0.1 feather weight raw material, do not carry out pilot scale and type approval test, and FEOL must heat in this method, add acid etc., complex process, and only produce a kind of product-Magnesium Carbonate Light 41-45 is not had a universal significance to the comprehensive utilization of boron mud.
The purpose of this invention is to provide a kind of industrial process of utilizing preparing high-purity magnesite product series from boron contained mud.Boron mud as the nonmetalliferous ore raw material, through light-burned, feeding carbonic acid gas, stirring, pressurization, filtration, is obtained the product of each temperature section by controlled temperature.Obtain the transparent magnesiumcarbonate of primary products, purity reaches 99.2%-99.8%; Intermediates magnesium oxide and magnesium hydroxide, purity is respectively 99.2%-99.5%; The finished product highly-purity magnesite, purity reaches 99.0%-99.5%.And technology is simple, does not add any catalyzer.
The preparation of classical magnesium compound, most of is raw material with magnesiumcarbonate, thereby the technology of producing magnesiumcarbonate is crucial, the magnesiumcarbonate solid is a magnesium basic carbonate, is to obtain with sour, alkaline precipitation or carbonic acid gas carbonization seawater or rhombspar.The present invention is that the precipitations such as magnesium oxide that will be not dissolved in water in the boron mud add the water and the carbonic acid gas role transformation generation Magnesium hydrogen carbonate aqueous solution, and after solid residue was removed in separation, solution carried out boiling and promptly obtains the basic carbonate magnesium precipitate after doing the scavenging agent purification through finished product again.Be reprocessed into finished product at last or under different temperature, dry according to demand, light-burned, heavily burn or products such as magnesium oxide and magnesia are just produced in high-temperature calcination respectively.
Basic technology of the present invention is as follows: with boron mud after 300-650 ℃ of light-burned processing, boron mud and water are with weight ratio 1: 10-20, in 2-18 cubic meter pressure-pot, mix, feeding is from the carbon dioxide in limestone kiln, concentration is 20-35%, stirred 1.5-4.5 hour, pressure 0.1-1.0MPAa, filter, add scavenging agent magnesiumcarbonate, the add-on of scavenging agent and the weight ratio of impurity 2: 1, after the purification, the aqueous solution is generated white magnesiumcarbonate precipitation 95-110 ℃ of following boiling, will be deposited in 100-150 ℃ of oven dry and obtain transparent magnesiumcarbonate, purity reaches 99.2-99.8%; After will being deposited in 700-850 ℃ of sintering, pulverizing and make the light magnesium oxide powder, purity reaches 99.2-99.5%; Magnesia powder is mixed by weight 2: 1 with water, promptly become magnesium hydroxide in 80-100 ℃ of oven dry, purity reaches 99.2-99.5%; To be deposited in 900-1250 ℃ of sintering and continue to be warmed up to 1500-1800 ℃ of calcining acquisition magnesia product.Purity of magnesite reaches 99.0-99.5% after testing.
Processing method of the present invention adopts boron mud direct carborization, and preparation cost is low, and technology is simple, economic benefit and social benefit height.Because the direct carbonization of boron mud does not need to add the magnesium salts structure that equivalent reagent such as alkali or lime remove to change boron mud, impurity and waste amount are few, are the technology that very cleans; Light-burned technology with add water and ventilation combines, strengthened the digestion and the hydration characteristics of boron mud, increased magnesian activity; Under controlled temperature heavily burn continuously and high-temperature calcination combines, produce highly-purity magnesite, shortened two step method by powder manufacturing magnesia; How many magnesiumcarbonate finished products adds in the filtrate by impurity, can fully purify the finished product, has guaranteed the high purity of product.
Embodiment provided by the invention is as follows:
Embodiment 1: with 150 kilograms in boron mud, after 300 ℃ of light-burned processing, add 1.5 cubic metres of water, in 2 cubic metres of pressure-pots, mix, feed density of carbon dioxide gas 20%, stirred 1.5 hours, pressure 1MPAa, filter, add 1.5 kilograms in scavenging agent magnesiumcarbonate, the aqueous solution after the purification is in 95 ℃ of hot digestions, generate white magnesiumcarbonate precipitation, after the filtration, promptly obtain 125 kilograms in transparent magnesiumcarbonate in 100 ℃ of oven dry, purity is 99.2%.
Embodiment 2: with 100 kilograms in boron mud, after 400 ℃ of light-burned processing, add 1.5 cubic metres of water, in 2 cubic metres of pressure-pots, mix, feed density of carbon dioxide gas 25%, stirred 2.0 hours, pressure 0.8MPa, filter, add 1.0 kilograms in scavenging agent magnesiumcarbonate, the aqueous solution after the purification is in 110 ℃ of hot digestions, generate white magnesiumcarbonate precipitation, after the filtration, promptly obtain 95 kilograms in transparent magnesiumcarbonate in 120 ℃ of oven dry, purity is 99.5%.
Embodiment 3: with 200 kilograms in boron mud, after 650 ℃ of light-burned processing, add 4 cubic metres of water, in 5 cubic metres of pressure-pots, mix, feed density of carbon dioxide gas 35%, stirred 4.5 hours, pressure 0.5MPAa, filter, add 2.0 kilograms in scavenging agent magnesiumcarbonate, the aqueous solution after the purification is in 100 ℃ of hot digestions, generate white magnesiumcarbonate precipitation, after the filtration, promptly obtain 180 kilograms in transparent magnesiumcarbonate in 150 ℃ of oven dry, purity is 99.8%.
Embodiment 4: with 330 kilograms in boron mud, after 400 ℃ of light-burned processing, add 4 cubic metres of water, in 5 cubic metres of pressure-pots, mix, feed density of carbon dioxide gas 25%, stirred 2.5 hours, pressure 1MPa, filter, add 3.30 kilograms in scavenging agent magnesiumcarbonate, 110 ℃ of hot digestions of the aqueous solution after the purification, generate white magnesiumcarbonate precipitation, to be deposited in 700 ℃ of sintering, and make light magnesium oxide powder 120 kg, purity reaches 99.5%.
Embodiment 5: with 280 kilograms in boron mud, after 500 ℃ of light-burned processing, add 4 cubic metres of water, in 5 cubic metres of pressure-pots, mix, feed density of carbon dioxide gas 35%, stirred 1.5 hours, pressure 0.1MPa, filter, add 2.80 kilograms in scavenging agent magnesiumcarbonate, 100 ℃ of hot digestions of the aqueous solution after the purification, generate white magnesiumcarbonate precipitation, to be deposited in 800 ℃ of sintering, and make 110 kilograms in light magnesium oxide powder, purity reaches 99.2%.
Embodiment 6: with 200 kilograms in boron mud, after 650 ℃ of light-burned processing, add 4 cubic metres of water, in 5 cubic metres of pressure-pots, mix, feed density of carbon dioxide gas 20%, stirred 4.5 hours, pressure 0.5MPa, filter, add 2.0 kilograms in scavenging agent magnesiumcarbonate, 95 ℃ of hot digestions of the aqueous solution after the purification, generate white magnesiumcarbonate precipitation, after will being deposited in 850 ℃ of sintering pulverizing, make 75 kilograms in magnesium oxide, purity reaches 99.4%.
Embodiment 7: 75 kilograms in the magnesium oxide that embodiment 6 is made, add after 37.5 kg of water mix, and in 90 ℃ of oven dry, promptly obtain the magnesium hydroxide 105 kg.Purity reaches 99.4%.
Embodiment 8: 75 kilograms in the magnesium oxide that embodiment 6 is made adds after 37.5 kg of water mix, and in 80 ℃ of oven dry, promptly obtains 108 kilograms of magnesium hydroxides.Purity reaches 99.3%.
Embodiment 9: 100 kilograms in the magnesium oxide that embodiment 6 is made adds after 37.5 kg of water mix, and in 100 ℃ of oven dry, promptly obtains the magnesium hydroxide 105 kg.Purity reaches 99.4%.
Embodiment 10: with 750 kilograms in boron mud, after 600 ℃ of light-burned processing, add 15 cubic metres of water, in 18 cubic metres of pressure-pots, mix, feed density of carbon dioxide gas 35%, stirred 3.5 hours, pressure 0.5MPa filters, and adds 7.5 kilograms in scavenging agent magnesiumcarbonate, aqueous solution heating after the purification generates white magnesiumcarbonate precipitation for 100 ℃, obtain the magnesiumcarbonate filter cake after the filtration, behind 1250 ℃ of sintering, transfer to 1650 ℃ of calcinings down, make 280 kilograms in magnesia, purity reaches 99.3%.
Embodiment 11: with 1000 kilograms in boron mud, after 550 ℃ of light-burned processing, add 15 cubic metres of water, in 18 cubic metres of pressure-pots, mix, feed density of carbon dioxide gas 30%, stirred 4 hours, pressure 0.6MPa filters, and adds 10 kilograms in scavenging agent magnesiumcarbonate, aqueous solution heating after the purification generates white magnesiumcarbonate precipitation for 110 ℃, obtain the magnesiumcarbonate filter cake after the filtration, behind 1200 ℃ of sintering, transfer to 1800 ℃ of calcinings down, make 360 kilograms in magnesia, purity reaches 99.5%.
Embodiment 12: with 1500 kilograms in boron mud, after 650 ℃ of light-burned processing, add 15 cubic metres of water, in 18 cubic metres of pressure-pots, mix, feed density of carbon dioxide gas 35%, stirred 4.5 hours, pressure 0.8MPa filters, and adds 15 kilograms in scavenging agent magnesiumcarbonate, aqueous solution heating after the purification generates white magnesiumcarbonate precipitation for 95 ℃, obtain the magnesiumcarbonate filter cake after the filtration, behind 1200 ℃ of sintering, transfer to 1500 ℃ of calcinings down, make 550 kilograms in magnesia, purity reaches 99.0%.
Claims (4)
1. method of producing magnesiumcarbonate with boron mud, be through roasting with boron mud, digestion, carbonization makes finished product, it is characterized in that boron mud after 300-650 ℃ of light-burned processing, boron mud and water are with weight ratio 1: 10-20, in 2-18 cubic meter pressure-pot, mix, feeding is from the carbon dioxide in limestone kiln, and concentration is 20-35%, stirs 1.5-4.5 hour, pressure 0.1-1.0MPa, filter, add scavenging agent magnesiumcarbonate, scavenging agent to add with the impurity weight ratio at 2: 1, after the purification, the aqueous solution is generated white magnesiumcarbonate precipitation 95-110 ℃ of following boiling, will be deposited in 100-150 ℃ of oven dry and obtain transparent magnesiumcarbonate, purity reaches 99.2-99.8%.
2. method of producing light magnesium oxide with boron mud, be through roasting with boron mud, digestion, carbonization makes finished product, it is characterized in that boron mud after 300-650 ℃ of light-burned processing, boron mud and water are with weight ratio 1: 10-20, mix in 2-18 cubic meter pressure-pot, feed the carbon dioxide from the limestone kiln, concentration is 20-35%, stirred 1.5-4.5 hour, pressure 0.1-1.0MPa filters, and adds scavenging agent magnesiumcarbonate, scavenging agent to add with the impurity weight ratio at 2: 1, after the purification, the aqueous solution is generated white magnesiumcarbonate precipitation 95-110 ℃ of following boiling, will be deposited in 700-850 ℃ of sintering after, pulverizing makes the light magnesium oxide powder, and purity reaches 99.2-99.5%.
3. method of producing magnesium hydroxide with boron mud, be through roasting with boron mud, digestion, carbonization makes finished product, it is characterized in that boron mud after 300-650 ℃ of light-burned processing, boron mud and water are with weight ratio 1: 10-20, in 2-18 cubic meter pressure-pot, mix, feeding is from the carbon dioxide in limestone kiln, concentration is 20-35%, stirs pressure 0.1-1.0MPa 1.5-4.5 hour, filter, add scavenging agent magnesiumcarbonate, scavenging agent adding with the impurity weight ratio, after the purification at 2: 1, the aqueous solution is generated white magnesiumcarbonate precipitation 95-110 ℃ of following boiling, after will being deposited in 700-850 ℃ of sintering, pulverizing and make the light magnesium oxide powder, magnesia powder is mixed by weight 2: 1 with water, promptly become magnesium hydroxide in 80-100 ℃ of oven dry, purity reaches 99.2-99.5%.
4. method of producing magnesia with boron mud, be through roasting with boron mud, digestion, carbonization makes finished product, it is characterized in that boron mud after 300-650 ℃ of light-burned processing, boron mud and water are with weight ratio 1: 10-20, in 2-18 cubic meter pressure-pot, mix, feeding is from the carbon dioxide in limestone kiln, concentration is 20-35%, stirred 1.5-4.5 hour, pressure 0.1-1.0MPa, filter, add scavenging agent magnesiumcarbonate, scavenging agent to add with the impurity weight ratio at 2: 1, after the purification, the aqueous solution is generated white magnesiumcarbonate precipitation 95-110 ℃ of following boiling, will be deposited in 700-850 ℃ of sintering after, pulverize and make the light magnesium oxide powder, magnesia powder is mixed by weight 2: 1 with water, promptly become magnesium hydroxide in 80-100 ℃ of oven dry, magnesium hydroxide is continued to be warmed up to 1500-1800 ℃ of calcining in 900-1250 ℃ of sintering obtain magnesia, purity reaches 99.0-99.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011189169A CN1193955C (en) | 2001-05-18 | 2001-05-18 | Process for preparing high-purity magnesite product series from boron contained mud |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011189169A CN1193955C (en) | 2001-05-18 | 2001-05-18 | Process for preparing high-purity magnesite product series from boron contained mud |
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| Publication Number | Publication Date |
|---|---|
| CN1386721A CN1386721A (en) | 2002-12-25 |
| CN1193955C true CN1193955C (en) | 2005-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB011189169A Expired - Fee Related CN1193955C (en) | 2001-05-18 | 2001-05-18 | Process for preparing high-purity magnesite product series from boron contained mud |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102139899B (en) * | 2010-11-25 | 2012-09-26 | 汪晋强 | Method for preparing magnesium sulfate monohydrate and co-producing manganese sulfate and calcium sulfate by using boric sludge |
| CN102139900B (en) * | 2010-11-25 | 2012-05-23 | 汪晋强 | Method for preparing magnesium sulfate heptahydrate co-produced with manganese sulfate and calcium sulfate from boric sludge |
| CN102030349B (en) * | 2010-11-29 | 2012-05-30 | 沈阳工业大学 | Method for extracting magnesium hydroxide by using boric sludge and treating dye wastewater |
| CN103819205B (en) * | 2013-11-25 | 2015-12-30 | 江苏大学 | A kind of induction furnace fast repairing furnace charge and fettling method |
| CN107021514B (en) * | 2017-05-25 | 2019-10-29 | 河北镁神科技股份有限公司 | A kind of high pure spherical magnesium carbonate raw powder's production technology used for cosmetic |
| CN109250735A (en) * | 2017-07-13 | 2019-01-22 | 田利 | A method of recycling trade waste boron mud |
| CN117735868B (en) * | 2024-02-21 | 2024-04-30 | 北京安科兴业科技股份有限公司 | Method for preparing magnesium silicate cementing material by taking solid waste boron mud as raw material |
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2001
- 2001-05-18 CN CNB011189169A patent/CN1193955C/en not_active Expired - Fee Related
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| CN1386721A (en) | 2002-12-25 |
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