CN102653459A - Thermoselect method and device for light roasting magnesium oxide - Google Patents
Thermoselect method and device for light roasting magnesium oxide Download PDFInfo
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- CN102653459A CN102653459A CN2011100495119A CN201110049511A CN102653459A CN 102653459 A CN102653459 A CN 102653459A CN 2011100495119 A CN2011100495119 A CN 2011100495119A CN 201110049511 A CN201110049511 A CN 201110049511A CN 102653459 A CN102653459 A CN 102653459A
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- 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
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Abstract
The invention discloses a thermoselect method and a device for light roasting magnesium oxide, realizing mechanical production of high-quality light roasting magnesium oxide. The invention comprises the following content: magnesite is calcined in a reflection kiln, the calcined magnesite is conveyed to a thermoselect screen through conveying equipment, the magnesite is graded according to particle size through the thermoselect of the thermoselect screen, and unqualified materials enter a waste box. The light roasting magnesium oxide enters a heat pipe exchanger to exchange heat with cold air, and hot air is introduced out to heating equipment. The light roasting magnesium oxide after heat exchange and cooling enters a reservoir for storing, the stored light roasting magnesium oxide is delivered to a mill by a feeder and a screw conveyer to be ground, and the ground light roasting magnesium oxide is bagged and put in storage or is directly bagged and put in storage without being ground by the mill. According to the thermoselect method and the device for the light roasting magnesium oxide, thermoselect is carried out on materials by utilizing the thermoselect method, the product has stable quality and high yield, and the comprehensive utilization of resource is facilitated; the heat pipe exchanger is utilized for waste heat recovery so that the effects of energy conservation and emission reduction are good; a series of conveying equipment is utilized for conveying materials in the reflection kiln out of the kiln, transporting the materials in the reflection kiln and the like, thereby the labor intensity of workers is reduced, and cleaner production is realized.
Description
Technical field
The present invention relates to the hot choosing method and the device thereof of the method and the device thereof, particularly a kind of light calcined magnesia of magnesite purification.
Background technology
Magnesite is the indispensable industrial mineral raw materials in field such as metallurgy, refractory materials, building materials, chemical industry, papermaking, rubber, plastics, coating, medicine, chemical fertilizer, and the Application and Development development is rapid and increasingly extensive.Purification to magnesite mainly contains flotation process and chemical method.Chemical method exists technical process complicacy, restive, the very high shortcoming of cost of technical parameter.Flotation process purification magnesite are adopted in the many mines of big number, the Chinese patent publication number be CN86102011 " flotation technology for magnesite ", publication number be CN1037098 " a kind of regime of agent of flotation magnesite ore " disclosed be exactly flotation process.First-class ore can obtain to contain MgCO after flotation
3>=98% fine ore, milling ore can obtain to contain MgCO after flotation
3>=96%～97% fine ore, and after selected, also can obtain the talcum concentrate about 10% to the mine tailing in the outer ore deposit of level.The shortcoming that flotation process exists is that the quicklime, the red stone that exist with isomorph in the carbonate mineralss such as rhombspar, calcite can't separate or be difficult to separate, and complex process, and investment is big, and production cost is than higher.The hot choosing method that has occurred magnesite in recent years again; Publication number is that the patent of CN1986846 " magnesite hot enriching process " has been described this method, and this patent is that the magnesite with＜20mm granularity is raw material, roasting between 600～1000 ℃; And insulation 2s～150min; Raw ore is fully decomposed, separate host and impure mineral that hardness after the roasting and intensity there are differences, the MgO content of the light-burning magnesium powder that obtains after the heat choosing can reach more than 96%.Have that technical process is short, cost is low, flexibility is strong, low-grade magnesite is had advantages such as good refining effect.It mainly is reflecting kiln that present heat is selected the light-burned device of process using, and the reflecting kiln investment is little, and technology is simple; But existing reflecting kiln kiln does not have supporting mechanised equipment, and production technology falls behind, and the kiln discharge in the reflecting kiln production, a series of processes such as material, screening, processing of having bad luck, dry in the air are artificial operation under open environment; Ore can not make full use of, and unstable product quality yields poorly; Labor strength is very high, and the waste heat of light calcined magnesia does not obtain recycling, and energy consumption is very high; Working condition is abominable, and environmental pollution is serious.
Summary of the invention
The invention provides a kind of hot choosing method and device thereof of light calcined magnesia.Utilize heat to jig material is carried out heat choosing, utilize waste-heat recovery device that the material waste heat is recycled, utilize a series of handling equipments that the reflecting kiln material is carried out kiln discharge, operation such as has bad luck, realize that mechanize produces the high quality light calcined magnesia.
The hot choosing method of light calcined magnesia provided by the invention comprises following content:
With granularity be the magnesite of 60～300mm in reflecting kiln after 700～1100 ℃ of calcinings; Utilizing handling equipment to be transported to heat jigs; Because the light calcined magnesia quality that magnesite obtains after the reflecting kiln calcining and decomposing is crisp and loose; And with the relative hardening of impure mineral such as the talcum of magnesite association, rhombspar, different according to host and impure mineral decomposition temperature and Strength Changes jig screening through heat to make magnesite by size classification; Granularity gets into dump bin greater than belonging to of 40mm of defective material.The light calcined magnesia that jigs through heat gets into hot tube heat exchanger, carries out thermal exchange with freezing air, adds warm air, and warm air leads to heating installation.In the cooled light calcined magnesia entering of heat exchange bank, store, deliver to grinding machine by feeding machine and worm conveyor again and grind, pack is put in storage, or directly packs warehouse-in without grinding machine.
The device that the hot choosing method of light calcined magnesia provided by the invention adopts comprises: handling equipment, heat jig, chute, dump bin, hot tube heat exchanger, bank, feeding machine, worm conveyor, cold air inlet, hot-blast outlet.Handling equipment is below the reflecting kiln hopper, and handling equipment is delivered to heat to material and jigged, and heat jigs by double-deck sieve and constitutes, and the upper sieve mesh size is 40～200mm, and the lower screen mesh is of a size of 20～40mm.Heat jigs and connects chute on the sieve, connects dump bin below the chute, and it is bank down that heat jigs sieve, and hot tube heat exchanger is housed in the bank, hot tube heat exchanger connection cold air inlet and hot-blast outlet.Connect feeding machine, worm conveyor below the bank successively.
The present invention compared with prior art, its obvious improvement is mainly reflected in outstanding effect:
1. utilize heat to jig material is carried out heat choosing, constant product quality, output be high, help comprehensive utilization of resources;
2. utilize hot tube heat exchanger to carry out waste heat recovery, light calcined magnesia material medial temperature is 500 ℃ before the heat exchange, and AT can reach 150～250 ℃ by normal temperature after solid-gas hot tube heat exchanger heat exchange, and ton product light calcined magnesia can generate warm air 1500m
3, can fuel saving 15%～25% as combustion air, amount to and save coal-fired 40～60kg/t product.
3. utilize a series of handling equipments that the reflecting kiln material is carried out kiln discharge, operation such as has bad luck; Adopt the sealing bank to constitute light calcined magnesia heat and select purification, waste heat recovery, material cooling, the incorporate production technique of cleaner production; Avoided flying upward of product to lose and environmental pollution; Improve reflecting kiln post-treatment operation production environment, reduced working strength of workers, realized cleaner production.
Description of drawings
Fig. 1 is the process flow sheet of the hot choosing method of light calcined magnesia.
Fig. 2 is the device that the hot choosing method of light calcined magnesia adopts.
Fig. 3 is to use the process flow sheet of hot choosing method of the light calcined magnesia of heat-resisting apron conveyor.
Fig. 4 is to use the process flow sheet of hot choosing method of the light calcined magnesia of load wagon or fork truck.
Embodiment
Be described in detail the present invention with embodiment below.
Embodiment 1
Like Fig. 2, shown in Figure 3; With granularity be the magnesite of 60～300mm in reflecting kiln after 700～1100 ℃ of calcinings; Utilize handling equipment 1 to be transported to heat and jig 2, handling equipment 1 adopts heat-resisting apron conveyor, and heat jigs 2 and is made up of double-deck sieve; The upper sieve mesh size is 40～200mm, and the lower screen mesh is of a size of 20～40mm.Jig 2 screenings through heat and make magnesite by size classification, granularity gets into dump bin 4 greater than belonging to of 40mm of defective material through chute 3.Jig 2 light calcined magnesia through heat and get into solid-gas formula hot tube heat exchanger 5, through hot tube heat exchanger 5, carry out thermal exchange with the freezing air that gets into from cold air inlet 9, add warm air, warm air leads to heating installation from hot-blast outlet 10.Get into storage in the bank 6 through the cooled light calcined magnesia of heat exchange, deliver to grinding machine by feeding machine 7 and worm conveyor 8 again and grind, the pack warehouse-in.
Like Fig. 2, shown in Figure 4, handling equipment adopts heat-resisting hopper and load wagon or fork truck, and other guide is with embodiment 1.
Claims (4)
1. the hot choosing method of a light calcined magnesia is characterized in that this method comprises following content:
With granularity be the magnesite of 60～300mm in reflecting kiln after 700～1100 ℃ of calcinings, utilize handling equipment to be transported to heat and jig, jig screening through heat and make magnesite by size classification; Granularity gets into dump bin greater than belonging to of 40mm of defective material, and the light calcined magnesia that jigs through heat gets into hot tube heat exchanger; Carry out thermal exchange with freezing air, add warm air, warm air leads to heating installation; In the cooled light calcined magnesia entering of heat exchange bank, store; Deliver to grinding machine by feeding machine and worm conveyor again and grind, pack is put in storage, or directly packs warehouse-in without grinding machine.
2. the device that adopts of the hot choosing method of the described light calcined magnesia of claim 1 is characterized in that this device comprises:
Handling equipment, heat jig, chute, dump bin, hot tube heat exchanger, bank, feeding machine, worm conveyor, cold air inlet, hot-blast outlet, and handling equipment is below the reflecting kiln hopper, and handling equipment is delivered to heat to material and jigged; Heat jigs by double-deck sieve and constitutes, and the upper sieve mesh size is 40～200mm, and the lower screen mesh is of a size of 20～40mm; Heat jigs and connects chute on the sieve; Connect dump bin below the chute, it is bank that heat jigs under the sieve, and hot tube heat exchanger is housed in the bank; Connect feeding machine, worm conveyor successively below hot tube heat exchanger connection cold air inlet and the hot-blast outlet, bank.
3. the device of the hot choosing method employing of light calcined magnesia according to claim 2 is characterized in that said handling equipment is heat-resisting apron conveyor.
4. the device of the hot choosing method employing of light calcined magnesia according to claim 2 is characterized in that said handling equipment is heat-resisting hopper and load wagon or fork truck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110049511.9A CN102653459B (en) | 2011-03-01 | 2011-03-01 | Thermoselect method and device for light roasting magnesium oxide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110049511.9A CN102653459B (en) | 2011-03-01 | 2011-03-01 | Thermoselect method and device for light roasting magnesium oxide |
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| Publication Number | Publication Date |
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| CN102653459A true CN102653459A (en) | 2012-09-05 |
| CN102653459B CN102653459B (en) | 2014-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110049511.9A Expired - Fee Related CN102653459B (en) | 2011-03-01 | 2011-03-01 | Thermoselect method and device for light roasting magnesium oxide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020199232A1 (en) * | 2019-03-29 | 2020-10-08 | 东北大学 | Method for preparing high-purity light-burned magnesia from low-grade magnesite by calcination to remove calcium and silicon |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85108710A (en) * | 1985-12-02 | 1986-09-03 | 冶金工业部马鞍山矿山研究院 | The method and apparatus of fluidizing furnace light-calcined magnesite stone |
| US4626198A (en) * | 1985-09-20 | 1986-12-02 | Fuller Company | Method and apparatus for producing dead burnt materials |
| CN1986846A (en) * | 2006-12-20 | 2007-06-27 | 辽宁科技大学 | Magnesite hot enriching process |
| CN101050068A (en) * | 2007-05-10 | 2007-10-10 | 芮新斌 | Method for preparing magnesium chlorate from magnesite |
-
2011
- 2011-03-01 CN CN201110049511.9A patent/CN102653459B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4626198A (en) * | 1985-09-20 | 1986-12-02 | Fuller Company | Method and apparatus for producing dead burnt materials |
| CN85108710A (en) * | 1985-12-02 | 1986-09-03 | 冶金工业部马鞍山矿山研究院 | The method and apparatus of fluidizing furnace light-calcined magnesite stone |
| CN1986846A (en) * | 2006-12-20 | 2007-06-27 | 辽宁科技大学 | Magnesite hot enriching process |
| CN101050068A (en) * | 2007-05-10 | 2007-10-10 | 芮新斌 | Method for preparing magnesium chlorate from magnesite |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020199232A1 (en) * | 2019-03-29 | 2020-10-08 | 东北大学 | Method for preparing high-purity light-burned magnesia from low-grade magnesite by calcination to remove calcium and silicon |
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| CN102653459B (en) | 2014-05-21 |
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