CN85108710B - Process and equipment for light burning magnesite in ebullating calciner - Google Patents
Process and equipment for light burning magnesite in ebullating calciner Download PDFInfo
- Publication number
- CN85108710B CN85108710B CN85108710A CN85108710A CN85108710B CN 85108710 B CN85108710 B CN 85108710B CN 85108710 A CN85108710 A CN 85108710A CN 85108710 A CN85108710 A CN 85108710A CN 85108710 B CN85108710 B CN 85108710B
- Authority
- CN
- China
- Prior art keywords
- fluidizing furnace
- flue gas
- furnace
- light
- ore
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a method and a device for producing soft burning magnesium oxide, particularly to a method and a device for producing soft burning magnesium oxide through the soft burning of magnesite ore by a fluidized bed furnace. The soft burning magnesium oxide with low burning loss, high activity, thin and uniform granularity and high quality is prepared by putting the magnesite ore with granularity of 0 to 25mm in a fluidized bed furnace through drying, heating, decomposition, burst, airflow milling and separation; therefore, the technique is simplified, and the grade of the magnesium oxide of the product is increased. The production device comprises a fluidized bed furnace, a material discharging screw, a smoke gas and air heat exchanger, a cyclonic dust collector, a multiclone dust collector, a cloth bag or an electric dust collector, a hopper, a negative pressure conveying and cooling system, an exhaust fan, etc.
Description
The present invention relates to a kind of method and apparatus of producing light calcined magnesia, particularly a kind of method and apparatus of producing light calcined magnesia with fluidizing furnace light-calcined magnesite stone.With granularity is that the giobertite of 0～25mm places in the fluidizing furnace, drying, heating, decomposition, explosion, air-flow is levigate, after the sorting, obtain burning lower, active high, fine size and high-quality light calcined magnesia has uniformly been simplified technology, improved the grade of product.
The product that the present invention produced is light calcined magnesia (claiming magnesia again), and this product can further be processed into magnesia, as basic refractory.Also can make multiple material of construction, and make the papermaking packing material.
Hot-work to magnisite stone at present generally has two kinds of methods.First one-step calcination, promptly
Magnisite MgCO
3 
Reburned magnesia sand MgO+CO
2↑ it two is two step calcinings, promptly
Magnisite MgCO
3 
Light calcined magnesia MgO+CO
2↑
Reburned magnesia sand MgO
For a long time, China produces the light calcined magnesia reverberatory furnace.It is the bulk raw ore of 25～100mm that but reverberatory furnace can only use granularity, and when mining the output granularity account for 40～45% less than the ore of 25mm, this part fine ore can not utilize substantially and pile up.Resource, land occupation had both been wasted, again contaminate environment.Once produced light calcined magnesia with rotary kiln, ring kiln for handling fine ore, but product percent of pass is lower, the energy consumption height.
The method that states such as West Germany, the U.S., Japan produce light calcined magnesia is a multiple bedded furnace, and this furnace structure complexity needs with more high-temperature steel, and operating rate is low, and the maintenance condition is poor, and unit surface throughput is low.
Above-mentioned reverberatory furnace, rotary kiln, ring kiln, multiple bedded furnace etc. are when light-burned magnisite stone, all be to go into stove with massive ore, the block light calcined magnesia of output, and departments such as fire-resistant, building materials, light industry need with light calcined magnesia all require granularity less than 120 μ m, therefore need further to pulverize with equipment such as Raymond mills, increase cargo handling operation, consumed the energy.Block giobertite is gone into stove, the block light calcined magnesia of output, and quality product is often uneven, in general forms surperficial burning easily, the center underburnt, therefore remaining the burning subtracts up to 3～8%, brings adverse consequences for next step operation.
Austria adopts shower furnace to handle the particulate giobertite, the outer decomposition technique of the stove of similar cement industry, its particulate giobertite is flotation concentrate or the prior levigated raw ore of granularity below 150 μ m, even, the remaining light calcined magnesia that reduces in 1% that burns of output quality after shower furnace is handled.Still need two subjobs but ore grinding, mill burn in advance.
MgO, CaO, AL in the method light-calcined magnesite stone products obtained therefroms such as above-mentioned reverberatory furnace, rotary kiln, multiple bedded furnace, shower furnace
2O
3, SiO
2, Fe
2O
3Deng composition, can only decide with the composition of raw ore, in the stove useful composition magnesium oxide MgO there is not inrichment, to useless composition AL
2O
2, SiO
2, Fe
2O
3Deng also there not being discarded function.
The light-burned method and apparatus that the purpose of this invention is to provide a kind of giobertite is to obtain uniform in quality, the remaining high-quality light calcined magnesia that lowers that burns.And can be with fine grinding job delete or the simplification before light-burned, after light-burned.Make the grade of useful composition MgO in the light-burned product improve impurity composition AL
2O
3, SiO
2, Fe
2O
3Reduce etc. grade.According to product to CaO/SiO
2Requirement, it is adjusted to proper proportion.
Technical process of the present invention and device are seen Fig. 1.Granularity is that the giobertite of 0～25mm is added in the fluidizing furnace (2) continuously by self-conveyor feed (1), ore is seethed with excitement by hot blast in the fluidizing furnace (by the roots blower supply and by the flue gas-air heat exchanger heating) and the flue gas that fuel combustion produces, ore is dried in stove, heating, decompose, explosion, air-flow is levigate, sorting, generate to burn and lower, active high, the light calcined magnesia of fine size, take furnace roof out of with the rising flue gas, through flue gas-air heat exchanger (3), cyclone (4), multiclone collector (5), cloth bag or dust precipitator (6), fine powder and flue gas are separated, fine powder combines in hopper (7), deliver to finished bin by negative-pressure conveying system (8), enter atmosphere by induced-draft fan (9) and chimney (10) after the gas cleaning.
Emit the partly interior material of stove by the load displacing screw (11) of fluidizing furnace bottom, can get rid of indissoluble impurity component in the ore, improve the content of magnesium oxide MgO in the furnace roof product, play the effect of hot sorting mined material.
In raw ore,, can adjust CaO/SiO in the product with addition of an amount of high calcium ore of certain particle size
2Ratio, satisfy the composition requirement of reburned magnesia sand.
Fluidizing furnace is up big and down small upright empty stove, and the bottom is provided with grid distributor, and the good oil-fired burner of several atomizing effects is arranged on the grid distributor.
Parameters such as the temperature of whole technology, pressure, air quantity, oil mass, feeding quantity all concentrate on master control room, show, write down and regulate with instrument.
Main technologic parameters of the present invention and product quality indicator are:
(1) light roasting temperature is 800～900 ℃
(2) ebullated bed operation wind speed 2～3 meter per seconds
(3) quality product
MgO content 80～97.5%(decides according to the grade of going into the stove ore);
Burning subtracts about 1%;
Granularity-74 μ m＞99%-40 μ m＞90%;
(4) 164 kilograms/ton of product oil consumption per ton (calorific value is about 9500 kilocalories/kilogram).
Claims (4)
1, a kind of method of producing light calcined magnesia, particularly a kind of method of producing light calcined magnesia with fluidizing furnace light-calcined magnesite stone, it is characterized in that giobertite adds in the fluidizing furnace by screw feeder continuously, ore is seethed with excitement by the flue gas of hot blast in the fluidizing furnace and fuel combustion generation, ore is dried in stove, heating, decompose, explosion, air-flow is levigate, fine-grained light calcined magnesia is taken furnace roof out of with the rising flue gas, through flue gas-air heat exchanger, cyclone, multiclone collector, cloth bag or dust precipitator, fine powder and flue gas are separated, fine powder combines in hopper, deliver to finished bin by negative-pressure conveying system, and the capable again sorting of indissoluble impurity component.
2, method according to claim 1 is characterized in that described sorting is the hot sorting in fluidizing furnace, gets rid of the impurity component indissoluble in the ore, that particle is bigger in the fluidizing furnace bottom by load displacing screw, thereby improves the content of magnesia in the product.
3, method according to claim 1 is characterized in that also will allocating in the described giobertite an amount of high calcium mineral, to adjust the CaO/Sio of product
2Ratio.
4, a kind of device with fluidizing furnace light-calcined magnesite stone production light calcined magnesia is characterized in that this device comprises fluidizing furnace, load displacing screw, flue gas-air heat exchanger, cyclone, multiclone collector, cloth bag or dust precipitator, hopper, negative pressure transportation cooling system, induced-draft fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85108710A CN85108710B (en) | 1985-12-02 | 1985-12-02 | Process and equipment for light burning magnesite in ebullating calciner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85108710A CN85108710B (en) | 1985-12-02 | 1985-12-02 | Process and equipment for light burning magnesite in ebullating calciner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85108710A CN85108710A (en) | 1986-09-03 |
| CN85108710B true CN85108710B (en) | 1988-05-25 |
Family
ID=4796110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85108710A Expired CN85108710B (en) | 1985-12-02 | 1985-12-02 | Process and equipment for light burning magnesite in ebullating calciner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85108710B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108118142A (en) * | 2017-12-29 | 2018-06-05 | 营口益嘉镁业科技有限公司 | A kind of suspension flash decomposes and homogenizing processing technique |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396799C (en) * | 2005-09-20 | 2008-06-25 | 孟宪民 | Synthetic adding ball and its preparing method |
| CN100462449C (en) * | 2006-12-20 | 2009-02-18 | 辽宁科技大学 | Magnesite hot enriching process |
| CN102653459B (en) * | 2011-03-01 | 2014-05-21 | 辽宁科技大学 | Thermoselect method and device for light roasting magnesium oxide |
| CN105734272B (en) * | 2016-02-22 | 2017-06-23 | 北京科技大学 | A kind of mechanical dynamic suspends with one-step baking beneficiation method and device |
| CN109136539B (en) * | 2018-07-05 | 2020-06-23 | 沈阳化工大学 | Integrated process of fluidized bed two-stage gasification and flash light burning magnesite |
| CN109320107A (en) * | 2018-10-26 | 2019-02-12 | 辽宁科技大学 | Suspension-boiling multithread state combination preparation high activity light calcined magnesia method |
| CN111484045B (en) * | 2020-04-23 | 2022-09-13 | 海城三岩矿业有限公司 | Multistage remelting purification method for fused magnesia |
-
1985
- 1985-12-02 CN CN85108710A patent/CN85108710B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108118142A (en) * | 2017-12-29 | 2018-06-05 | 营口益嘉镁业科技有限公司 | A kind of suspension flash decomposes and homogenizing processing technique |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85108710A (en) | 1986-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2855290A (en) | Method of reducing iron oxide to sponge iron | |
| GB1530224A (en) | Cement clinker | |
| CN100556840C (en) | Carbide slag 100% substitutes natural calcareous raw material kiln and decomposes the method for producing cement clinker outward | |
| CN85108710B (en) | Process and equipment for light burning magnesite in ebullating calciner | |
| CN102190449B (en) | Light burning system and method of magnesite | |
| CN108585555B (en) | Industrial powder clinker homogeneous calcination preparation equipment and preparation method | |
| CN1004073B (en) | Method and apparatus for producing cement clinker including white cement | |
| JPH1045444A (en) | Treatment of coal ash | |
| CN218787710U (en) | Iron ore sintering system for resource utilization of calcium-based solid waste | |
| CN109052997B (en) | Method for preparing high-activity light-burned magnesium oxide by using fixed bed-fluidized bed in multi-flow state | |
| CN105565832B (en) | A method of preparing dry method stamp mass using high calcium and low silicone magnesite | |
| CN101306924A (en) | Method and apparatus for light-burning magnesium powder for rotary kiln | |
| JP2005104792A (en) | Manufacturing method of cement using coal ash | |
| JP3580896B2 (en) | Method and apparatus for producing cement admixture and mixed cement | |
| CN104120263A (en) | High-solid-gas-ratio rotary kiln direct reduction method for nickel iron smelting | |
| US3280228A (en) | Production of dead burned refractory grain in a shaft kiln | |
| CN201648243U (en) | Light burning system for magnesite | |
| JP2851460B2 (en) | Manufacturing method of artificial lightweight aggregate | |
| CN108558239A (en) | A kind of accurate preparation facilities of magnesia and method | |
| JP2625218B2 (en) | Method for firing coal ash granules | |
| GB1153388A (en) | Improved Method of Making Light-Weight Aggregate from Fly Ash. | |
| CN102653394A (en) | Technology for reducing plaster and generating SO2 and CaO by using coal in multistage multi-atmosphere fluidized bed | |
| CN110950367B (en) | Process for cooperatively producing calcium aluminate powder by using power station boiler | |
| JPS594024Y2 (en) | Cooling device for high temperature powder and granular materials | |
| JPH0433751B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |