CN101717263A - Method for preparing forsterite by roasting silicate olivine ore with microwave - Google Patents
Method for preparing forsterite by roasting silicate olivine ore with microwave Download PDFInfo
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- CN101717263A CN101717263A CN200910272899A CN200910272899A CN101717263A CN 101717263 A CN101717263 A CN 101717263A CN 200910272899 A CN200910272899 A CN 200910272899A CN 200910272899 A CN200910272899 A CN 200910272899A CN 101717263 A CN101717263 A CN 101717263A
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- ore
- microwave
- forsterite
- temperature
- silicate
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Abstract
The invention discloses a method for preparing forsterite by roasting silicate olivine ore with microwave. Silicate olivine ore is put into a microwave kiln for calcination; when temperature is controlled to be below 600 DEG C, the silicate olivine ore removes crystal water; then the silicate olivine ore continues to calcine at high temperature of 600-1500 DEG C for 2-5 minutes; and the obtained product is cooled to room temperature to obtain clinker forsterite. The invention directly transmits microwave energy irradiation to silicate olivine ore material molecules so as to ensure that the molecule can obtain corresponding heat energy at low temperature; crystal water in ore is removed, and the product lump material is sintered, so that pure peridotite with serious alteration is changed into high-grade forsterite. A microwave oven is used for finishing calcining, and ore blocks can reach required temperature within only 2-5 minutes, thus lowering energy consumption; No CO, CO2, SO2, waste gas, waste dust and heat emission exist, so that no pollution is caused to environment.
Description
Technical field
The present invention relates to a kind of method that the low-grade dunite of top layer alteration, serpentine is prepared regeneration forsterite grog by microwave calcination.
Background technology
Microwave be frequency at the hertzian wave (wavelength 1m-1mm) of 300 megahertzes to 300 mega hertzs, be used in usually in TV, broadcasting, the mechanics of communication; And in using modern age it is expanded another branch, promptly microwave as a kind of energy, in industrial or agricultural, heat, drying; In chemical industry, carry out the catalysed promoted chemical reaction; Activated plasmas etc., the frequency that China is used for the industry heating at present is 915 megahertzes and 2450 megahertzes.Dielectric material is made up of polar molecule and non-polar molecule, and under electromagnetic field effect, these polar molecules are from the polarity oriented of original stochastic distribution state shift according to electric field.Under the high-frequency electromagnetic effect, these orientations change by the variation of alternating electromagnetic field, thereby this process causes the motion of molecule and the generation heat that rubs mutually.This moment, the field energy of alternating electromagnetic field was converted into the interior kinetic energy of medium, medium temperature was constantly raise, the ultimate principle of microwave heating that Here it is.
Compare with conventional heating means, the control of microwave heating can reach the purpose of lifting, start-stop moment as long as controlling power is controlled knob.Because only to object heating itself, air heats hardly in body of heater, the furnace chamber, so thermal inertia is minimum when heating.
Peridotites belongs to one of world's scarce resource owing to geology generates and the mineral structure reason.Yichang peaceful small stream peridotites aboundresources, about 600,000,000 tons of reserves.But the resource alteration is serious, alteration peridotites (MgO 〉=44% not, vector≤3% burns) only there are tens million of tons, and be imbedded in the following deep of hundreds of rice, and account for peridotites more than 90%, alteration in various degree becomes MgO＜40%, the dunite and the serpentine of bright vector＞8%, especially several hundred million tons of alteration dunites in top layer, mining area (serpentine), MgO＜32%, vector＞10% that burns can not directly be used for industry, can only make low-grade fused(calcium magnesium)phosphate raw material with 15 yuan/ton-25 yuan/ton, resource and utilization ratio are low.
The roasting mode that adopts for the alteration dunite is processed at present, and as energy derive, temperature is 800-1200 ℃ in the stove of normal peridotites roasting with coal, coal gas, heavy oil or coal dust.The tunnel furnace laid down cost that adopts is big, and energy expenditure is big, and operation is many.Do not appear in the newspapers and utilize microwave that silicate olivine ore is handled.
Summary of the invention
The objective of the invention is to provide a kind of microwave that utilizes that silicate olivine ore surface alteration dunite, serpentine are carried out calcination processing, obtain the method for forsterite grog.
The object of the present invention is achieved like this: a kind of method of preparing forsterite by roasting silicate olivine ore with microwave, place microwave kiln to calcine silicate olivine ore, when controlled temperature is lower than 600 ℃, make silicate olivine ore take off the mistake crystal water, proceed high-temperature calcination, the calcining high-temperature zone time is 2-5 minute, and the high-temperature zone temperature is cooled to room temperature and obtains the grog forsterite between 600-1500 ℃.
Described silicate olivine ore is the dunite or the serpentine of ore body top layer alteration, and MgO content is less than 39%, and the vector that burns is greater than 10%.
The method of preparing forsterite by roasting silicate olivine ore with microwave provided by the invention, directly conduct to silicate olivine material molecule by the microwave energy radiation, make molecule under low-temperature condition, obtain corresponding heat energy, crystal water in the ore (OH) is rejected, goods piece material sintering; Thereby the dunite that alteration is serious becomes high grade forsterite, saves resource and improves resource utilization.Adopt microwave oven to finish calcining, only needed 2-5 minute can make lump reach needed temperature, reduced energy expenditure, compare 30%-46% capable of reducing energy consumption with traditional heating mode, do not have CO, CO
2, SO
2, useless cigarette, useless dirt and heat energy discharging, can not produce and pollute environment.The forsterite that obtains vector＜1.0% that burns.Its main physical and chemical index is: Mgo 〉=44%, SiO
2≤ 45%, Tfe
2o
3＜10%, Al
2o
3+ Cao＜1.0%, refractoriness 〉=1710 ℃.
Embodiment
Raw material selection alteration dunite or serpentine, Mgo＜32%, vector＞10% that burns is placed in the microwave kiln and calcines, and dunite when being lower than 600-700 ℃ (serpentine) takes off the mistake crystal water, and altered mineral is reduced into forsterite Mg
2SiO
4With part MgSiO
3, i.e. 2MgO, SiO
2+ H
2O makes its goods be lower than 600-1500 ℃ of abundant sintering, and the calcining high-temperature zone time is 2-5 minute.Remove crystal water and other fugitive constituent impurity in the ore, obtain the grog forsterite after being cooled to room temperature, vector＜1.0% burns.Its main physical and chemical index is: MgO 〉=44%, SiO
2≤ 45%, Tfe
2o
3＜10%, Al
2O
3+ CaO＜1.0%, refractoriness 〉=1710 ℃.More traditional lime burner furnace does not have CO, CO
2, SO
2, useless cigarette, gas discharging, and improve output, cut down the consumption of energy, really realized environmental protection, energy-saving industrial production.
The grog forsterite that obtains is crushed to diameter less than 25mm, makes 4 orders/70 purpose sand or the 150 orders/various granularity powdery of 400 purposes specification with high pressure pulverizing mill or ball mill again, obtains required forsterite sand, powder product and goods.
Claims (2)
1. the method for a preparing forsterite by roasting silicate olivine ore with microwave, it is characterized in that: place microwave kiln to calcine silicate olivine ore, when controlled temperature is lower than 600 ℃, make silicate olivine ore take off the mistake crystal water, proceed high-temperature calcination, the calcining high-temperature zone time is 2-5 minute, and the high-temperature zone temperature is cooled to room temperature and obtains the grog forsterite between 600-1500 ℃.
2. the method for preparing forsterite by roasting silicate olivine ore with microwave according to claim 1, it is characterized in that: described silicate olivine ore is the dunite or the serpentine of alteration, and MgO content is less than 32%, and the vector that burns is greater than 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910272899A CN101717263A (en) | 2009-11-24 | 2009-11-24 | Method for preparing forsterite by roasting silicate olivine ore with microwave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910272899A CN101717263A (en) | 2009-11-24 | 2009-11-24 | Method for preparing forsterite by roasting silicate olivine ore with microwave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101717263A true CN101717263A (en) | 2010-06-02 |
Family
ID=42431909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910272899A Pending CN101717263A (en) | 2009-11-24 | 2009-11-24 | Method for preparing forsterite by roasting silicate olivine ore with microwave |
Country Status (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102381884A (en) * | 2011-09-14 | 2012-03-21 | 南京工业大学 | Method for preparing porous insulation material by microwave heating alkali metal silicate |
| CN103553560A (en) * | 2013-10-29 | 2014-02-05 | 新疆华莎能源股份有限公司 | Method for preparing forsterite from olivine ores |
| CN114213049A (en) * | 2021-12-09 | 2022-03-22 | 中海石油(中国)有限公司 | Carbon dioxide corrosion resistant material for oil well cement and preparation method and application thereof |
-
2009
- 2009-11-24 CN CN200910272899A patent/CN101717263A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102381884A (en) * | 2011-09-14 | 2012-03-21 | 南京工业大学 | Method for preparing porous insulation material by microwave heating alkali metal silicate |
| CN102381884B (en) * | 2011-09-14 | 2012-07-25 | 南京工业大学 | Method for preparing porous insulation material by microwave heating alkali metal silicate |
| CN103553560A (en) * | 2013-10-29 | 2014-02-05 | 新疆华莎能源股份有限公司 | Method for preparing forsterite from olivine ores |
| CN103553560B (en) * | 2013-10-29 | 2015-08-05 | 新疆华莎能源股份有限公司 | A kind of olive stone ore prepares the method for forsterite |
| CN114213049A (en) * | 2021-12-09 | 2022-03-22 | 中海石油(中国)有限公司 | Carbon dioxide corrosion resistant material for oil well cement and preparation method and application thereof |
| CN114213049B (en) * | 2021-12-09 | 2022-08-02 | 中海石油(中国)有限公司 | Carbon dioxide corrosion resistant material for oil well cement and preparation method and application thereof |
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Application publication date: 20100602 |