CN104071993B - The device of a kind of microwave light-calcined magnesite, rhombspar and method - Google Patents
The device of a kind of microwave light-calcined magnesite, rhombspar and method Download PDFInfo
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- CN104071993B CN104071993B CN201410291913.3A CN201410291913A CN104071993B CN 104071993 B CN104071993 B CN 104071993B CN 201410291913 A CN201410291913 A CN 201410291913A CN 104071993 B CN104071993 B CN 104071993B
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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 present invention relates to a kind of microwave light-calcined magnesite, the device of rhombspar and method, magnesite, rhombspar are put into microwave oven after pulverizing, material is heated, makes material with every minute ramp of 5-10 DEG C, temperature of charge is warming up to 800��880 DEG C, insulation 20��40min; Product is discharged by discharge port through drainage conduit, enters in the material conveying vehicle walked in orbit and transports; Realize to magnesite, rhombspar light-burned continuously. The present invention utilizes microwave combustion method rate of heating fast, pollution-free, homogeneous heating, the product quality height of production, without topsoil, and energy-conserving and environment-protective. The present invention adopts touch-screen and PLC centralized Control, it is to increase the level of automation of whole equipment and craft precision, ensure that product quality, can big batch processing magnesite, rhombspar, it is achieved industrial large-scale production, it is to increase production efficiency.
Description
Technical field
The present invention relates to the device of a kind of microwaving minerals raw material, particularly relate to a kind of device and the method that utilize microwave combustion method light-calcined magnesite, rhombspar.
Background technology
Magnesite and rhombspar are a kind of important nonmetalliferous ore raw materials, except more than 80% as except refractory materials, are also extraction of metal magnesium and the raw material producing other magnesium salt. The necessary step of processing magnesite, rhombspar is that high temperature is light-burned, and the product of 700-1000 DEG C of light-burned output claims light-calcined magnesite and light dolomite. According to current research, the purposes of light-calcined magnesite is relatively wide, main fertilizer and the animal feedstuff additive being used as to promote root class increasing crop yield; As the raw material of high-magnesia cement (Suo Lieer cement) and melt oxidation magnesium; As filler and the additive of plastics, paint, binding agent, rubber; As the admixtion of medicine, antacid, sterilant, toothpaste, ointment, milk of magnesia; Produce the raw material of magnesium salt. In environment protection, light-calcined magnesite can be used as boiler oil additive, and gas desulfurization, absorption heavy metal, neutralizing acid, disposes of sewage and waste liquid, removing algae, other organism of dye well, filtering suspension liquid, pulp treatment and papermaking wastewater etc. Light calcined magnesia is also widely used in metallurgical industry.
Magnesite, rhombspar are CaCO3With MgCO3Mixture (MgCO3��CaCO3). CaCO when being heated to a certain temperature, in rhombspar3With MgCO3It is decomposed into CaO and MgO by following formula.
MgCO3��CaCO3��MgO��CaO+2CO2
At present, light-calcined magnesite, rhombspar adopt shaft furnace or rotary kiln usually, utilize coal gas or Sweet natural gas to heat, and the method causes heating slowly, and thermo-efficiency is low, seriously polluted, energy consumption height, wastes a large amount of energy, poor product quality.
Microwave combustion method utilizes microwave material and microwave field to be interacted, and microwave is by absorbed and is converted into heat energy, from a kind of heat treating method that its entirety is heated by material internal. Utilizing microwave to heat-treat, heating energy-conservation with it is quick without the advantage such as heat stagnation and matter interaction, and therefore microwave obtains at Field of Heat-treatment and applies more and more widely.
Summary of the invention
Technical problem to be solved by this invention: the present invention is directed to the deficiencies in the prior art, a kind of device that can process magnesite, rhombspar in a large number is provided, this device homogeneous heating, high insulating effect, whole system energy consumption is low, can be reclaimed by the gas produced, product quality height in production process simultaneously, whole process is environment friendly and pollution-free, it is thus possible to effectively solve problems of the prior art.
The present invention also provides a kind of method utilizing said apparatus process magnesite, rhombspar.
The technical scheme of the present invention:
The device of a kind of microwave heating light-calcined magnesite, rhombspar, comprising microwave oven, pilot circuit and PLC, described microwave oven (1) comprises body of heater (1-1), inner chamber (1-2), bell (1-6), drainage conduit (2) and microwave source (1-10); Several microwave sources (1-10) become the circle-shaped outside being evenly distributed on body of heater (1-1); The inner chamber (1-2) of microwave oven is cylinder shape cavity, thermopair (1-9) it is provided with in cavity, lagging material (1-3) is wrapped up around cavity, inner chamber (1-2) lower section is connected with drainage conduit (2), and drainage conduit (2) is provided with discharge valve (2-1); Bell (1-6) is provided with vapor pipe (1-4), and the bottom of body of heater (1-1) is provided with water shoot (1-5); The product of microwave combustion method is discharged by discharge port (3) through drainage conduit (2); Described thermopair (1-9) and microwave source (1-10) are all connected with PLC by pilot circuit.
Described microwave oven (1) also comprises tightness system (1-7) and microwave shielding device (1-8), tightness system (1-7) and microwave shielding device (1-8) are all positioned between body of heater (1-1) and bell (1-6), tightness system (1-7) adopts rubber seal to make, microwave shielding device (1-8) adopts copper guipure micro-wave screening circle to make, and tightness system (1-7) is positioned at the inner side of microwave shielding device (1-8).
The product discharged by discharge port (3) enters in the material conveying vehicle (4) on track (5); The gas produced is discharged by the vapor pipe (1-4) on top, and the water of generation is discharged by the water shoot (1-5) of bottom.
Described microwave oven is N number of, and N >=2 are parallel with one another between each microwave oven, and containing touch-screen in described pilot circuit, touch-screen is connected with the PLC pilot circuit of N number of microwave oven respectively by data bus; Described PLC pilot circuit contains manual switch and the signals collecting circuit of the some amount being connected with input terminus.
Described inner chamber (1-2) preferential oxidation aluminium matter.
Utilize the method for said apparatus light-calcined magnesite, rhombspar, comprise the following steps:
(1) magnesite, rhombspar are added after pulverizing in the inner chamber of microwave oven, cover bell, good seal;
(2) open microwave oven, start to be heated by material; Regulating the output rating of microwave oven, make material with every minute ramp of 5-10 DEG C, the temperature in detection microwave oven, makes temperature of charge be warming up to 800��880 DEG C, and is incubated 20��40 minutes at this temperature;
(3) closing microwave oven, open discharge valve, product is discharged by discharge port through drainage conduit, enters in the material conveying vehicle walked in orbit and transports;
(4) repeat (1)-(3) step, it is achieved to magnesite, rhombspar light-burned continuously.
In the method for light-calcined magnesite, rhombspar, the magnesite after pulverizing, the granularity of rhombspar are less than 20mm, and the power of each microwave oven is 30-40KW.
The useful effect of the present invention:
1, the microwave light-calcined magnesite of the present invention, in the device of rhombspar, several microwave sources are become the circle-shaped outside being evenly arranged in microwave oven, process furnace inner chamber is provided with lagging material, microwave source is connected with PLC by pilot circuit, this process furnace homogeneous heating, high insulating effect, can process magnesite, rhombspar in large quantity, level of automation height, technique is simple.
2, the present invention utilizes microwave combustion method to carry out light-burned to magnesite, rhombspar. During heating, material self entirety heats up simultaneously, and rate of heating is fast, pollution-free, homogeneous heating, and after process, the rate of decomposition of ore can reach more than 95%; Microwave heating simultaneously can accurately control, and shortens the light-burned time, save energy.
3, the present invention arranges tightness system and microwave shielding device between body of heater and bell, and sealing and micro-wave screening are effective, can prevent microwave radiation preferably, be conducive to protection of the environment, energy-saving safe.
4, the present invention participates in without the need to protectiveness gas when heating, and the gas produced in production process is mainly CO2, it is possible to recycle, without topsoil, energy-conserving and environment-protective.
5, the device control of the present invention adopts touch-screen and PLC centralized Control, gathers in-furnace temperature by the thermopair being arranged in microwave oven, and PLC controls microwave heating temperature. A touch-screen can control the PLC of multiple stage microwave oven, and man-machine interactive operation is intuitively easy, and equipment debugging is safeguarded simple, and adjusting process parameter is convenient, dependable performance.
6, the method for the present invention can make the running cost of microwave oven greatly reduce, operation steps is simple, control accuracy height, immunity from interference is strong, it is achieved that intelligent operation, saves a large amount of manpower financial capacity, improve level of automation and the craft precision of whole equipment, ensure that product quality, it is achieved that industrial large-scale production, it is to increase production efficiency.
Adopting the method for the present invention that according to the method for embodiment two, three, magnesite, the rhombspar in area, Gongyi, Zhengzhou are carried out light-burned process, its product composition, such as following table (quality %), shows through calculating, and the rate of decomposition of raw material is 95.8-96.9%.
Accompanying drawing illustrates:
Fig. 1 is the microwave light-calcined magnesite of the present invention, the structural representation of rhombspar device;
Fig. 2 is the structural representation of the microwave oven of the present invention;
Fig. 3 is the plan structure figure of the microwave oven of the present invention;
In figure, 1, microwave oven; 1-1, body of heater; 1-2, inner chamber; 1-3, lagging material; 1-4, vapor pipe; 1-5, water shoot; 1-6, bell; 1-7, tightness system; 1-8, microwave shielding device; 1-9, thermopair; 1-10, microwave source; 2, drainage conduit; 2-1, discharge valve; 3, discharge port; 4, material conveying vehicle; 5, track.
Fig. 4 is the XRD figure that microwave light-calcined magnesite obtains product;
Fig. 5 is the XRD figure that microwave light dolomite obtains product;
From Fig. 4, Fig. 5, the light-burned MgO powder each diffraction peak position obtained and intensity are all completely the same with the MgO of face-centered cubic crystal structure, and main diffraction peak is relatively sharp-pointed, show that magnesite, rhombspar have resolved into the MgO of crystallization face-centered cubic crystalline phase more completely completely.
Fig. 6 is the microwave light-calcined magnesite of the present invention, the process flow sheet of rhombspar.
Embodiment
Embodiment one: the device of a kind of microwave heating light-calcined magnesite, rhombspar, see Fig. 1-3, comprises microwave oven, pilot circuit and PLC, and microwave oven 1 comprises body of heater 1-1, inner chamber 1-2, bell 1-6, drainage conduit 2 and microwave source 1-10; Several microwave source 1-10 become the circle-shaped outside being evenly distributed on body of heater 1-1; The inner chamber 1-2 of microwave oven is cylinder shape cavity, is provided with thermopair 1-9 in cavity, wraps up lagging material 1-3 around cavity, is connected with drainage conduit 2 below inner chamber 1-2, and drainage conduit 2 is provided with discharge valve 2-1; Bell 1-6 is provided with vapor pipe 1-4, and the bottom of body of heater 1-1 is provided with water shoot 1-5; The product of microwave combustion method is discharged by discharge port 3 through drainage conduit 2; Thermopair 1-9 and microwave source 1-10 is all connected with PLC by pilot circuit; Described inner chamber (1-2) is aluminum oxide material.
The product discharged by discharge port 3 enters in the material conveying vehicle 4 on track 5; The gas produced is discharged by the vapor pipe 1-4 on top, and expellant gas is CO mainly2, after reclaiming and purifying, can be used for the storing and fresh-keeping of food-drink, smelting iron and steel, protection welding, oil production etc.; The water produced is discharged by bottom water shoot 1-5.
Described microwave oven 1 also comprises tightness system 1-7 and microwave shielding device 1-8, tightness system 1-7 and microwave shielding device 1-8 is all between body of heater 1-1 and bell 1-6, tightness system 1-7 adopts rubber seal to make, microwave shielding device 1-8 adopts copper guipure micro-wave screening circle to make, and tightness system 1-7 is positioned at the inner side of microwave shielding device 1-8.
Described microwave oven can be one or more, parallel with one another between each microwave oven, and containing touch-screen in described pilot circuit, touch-screen is connected with the PLC pilot circuit of N number of microwave oven respectively by data bus; PLC pilot circuit contains manual switch, the signals collecting circuit of the some amount being connected with input terminus.
Embodiment two: a kind of method of microwave device light-calcined magnesite utilizing example one, comprises the following steps (see Fig. 1-Fig. 6):
(1) this example adopts four microwave ovens, it is respectively a stove, No. two stoves, No. three stoves and No. four stoves, in parallel by PLC pilot circuit, after magnesite powder is broken to the particle being less than 20mm, measure 300 kilograms respectively to add in 4 microwave ovens, cover bell, good seal;
(2) open microwave oven, material is heated. The power of microwave oven is 30-40KW, regulate the output rating of microwave oven, make material with every minute ramp of 5 DEG C, detect the temperature in a stove, No. two stoves, No. three stoves and No. four stoves respectively, after making it to reach 840 DEG C, then it is incubated 20 minutes at this temperature; The gas produced in heat-processed is discharged by vapor pipe, and the water of generation is discharged by bottom water shoot;
(3) closing microwave oven after heating, open discharge valve, material is discharged by discharge port through drainage conduit, enters in the material conveying vehicle walked in orbit and transports;
(4) above step is repeated, it is achieved light-burned continuously to magnesite.
In this example, the number of microwave oven can be determined as required.
Embodiment three: the method utilizing the microwave device light dolomite of example one, substantially identical with example two, difference is: adopt six microwave ovens in (1) this example, six microwave ovens are in parallel by PLC pilot circuit, after ground dolomite is broken to the particle being less than 20mm, measure 300 kilograms respectively to add in 6 microwave ovens, cover bell, good seal;
(2) open microwave oven, material is heated. Regulate the output rating of microwave oven, make material with every minute ramp of 10 DEG C, detect the temperature in six process furnace respectively, after making it to reach 860 DEG C, be then incubated 30 minutes at this temperature; (3) closing microwave oven after heating, open discharge valve, material is discharged by discharge port through drainage conduit, enters in the material conveying vehicle walked in orbit and transports;
(4) above step is repeated, it is achieved light-burned continuously to rhombspar.
Claims (7)
1. the device of a microwave heating light-calcined magnesite, rhombspar, comprise microwave oven, pilot circuit and PLC, it is characterized in that: described microwave oven (1) comprises body of heater (1-1), inner chamber (1-2), bell (1-6), drainage conduit (2) and microwave source (1-10); Several microwave sources (1-10) become the circle-shaped outside being evenly distributed on body of heater (1-1); The inner chamber (1-2) of microwave oven is cylinder shape cavity, thermopair (1-9) it is provided with in cavity, lagging material (1-3) it is enclosed with around cavity, inner chamber (1-2) lower section is connected with drainage conduit (2), and drainage conduit (2) is provided with discharge valve (2-1); Bell (1-6) is provided with vapor pipe (1-4), and the bottom of body of heater (1-1) is provided with water shoot (1-5); The product of microwave combustion method is discharged by discharge port (3) through drainage conduit (2); Described thermopair (1-9) and microwave source (1-10) are all connected with PLC by pilot circuit.
2. microwave heating light-calcined magnesite as claimed in claim 1, the device of rhombspar, it is characterized in that: described microwave oven (1) also comprises tightness system (1-7) and microwave shielding device (1-8), tightness system (1-7) and microwave shielding device (1-8) are all positioned between body of heater (1-1) and bell (1-6), tightness system (1-7) adopts rubber seal to make, microwave shielding device (1-8) adopts copper guipure micro-wave screening circle to make, and tightness system (1-7) is positioned at the inner side of microwave shielding device (1-8).
3. the device of microwave heating light-calcined magnesite as claimed in claim 1, rhombspar, is characterized in that: in the material conveying vehicle (4) that the product discharged by discharge port (3) enters on track (5); The gas produced is discharged by the vapor pipe (1-4) on top, and the water of generation is discharged by the water shoot (1-5) of bottom.
4. the device of microwave heating light-calcined magnesite as described in item as arbitrary in claim 1-3, rhombspar, it is characterized in that: described microwave oven is N number of, N >=2, between each microwave oven parallel with one another, containing touch-screen in described pilot circuit, touch-screen is connected with the PLC pilot circuit of N number of microwave oven respectively by data bus; Described PLC pilot circuit contains manual switch and the signals collecting circuit of the some amount being connected with input terminus.
5. the device of microwave heating light-calcined magnesite as claimed in claim 4, rhombspar, is characterized in that: described inner chamber (1-2) is aluminum oxide material.
6. utilize the device light-calcined magnesite of claim 1-5 arbitrary, the method for rhombspar, it is characterized in that:
The method comprises the following steps:
(1) magnesite, rhombspar are added after pulverizing in the inner chamber of microwave oven, cover bell, good seal;
(2) open microwave oven, start to be heated by material; Regulating the output rating of microwave oven, make material with every minute ramp of 5-10 DEG C, the temperature in detection microwave oven, makes temperature of charge be warming up to 800��880 DEG C, and is incubated 20��40 minutes at this temperature;
(3) closing microwave oven, open discharge valve, product is discharged by discharge port through drainage conduit, enters in the material conveying vehicle walked in orbit and transports;
(4) repeat (1)-(3) step, it is achieved to magnesite, rhombspar light-burned continuously.
7. the method for light-calcined magnesite as claimed in claim 6, rhombspar, is characterized in that: the magnesite after pulverizing, the granularity of rhombspar are less than 20mm, and the power of each microwave oven is 30-40KW.
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| CN104310809B (en) * | 2014-10-22 | 2016-06-08 | 张土山 | A kind of sandwich lime calcining equipment |
| CN106152785B (en) * | 2016-09-26 | 2019-04-16 | 武汉科技大学 | A kind of heating furnace and its application method of ore microwave treatment |
| CN107010852B (en) * | 2017-04-20 | 2019-04-05 | 辽宁科技大学 | A kind of light calcined magnesia production method |
| CN108249786B (en) * | 2018-01-23 | 2020-07-03 | 辽宁瀚海工业机电设备有限公司 | Method for continuously producing active magnesium oxide and recovering carbon dioxide by heating magnesite with microwaves |
| CN112007686A (en) * | 2020-09-10 | 2020-12-01 | 江苏飞亚化学工业有限责任公司 | Catalyst preparation process for continuous production of alkylbenzene |
| CN113620615A (en) * | 2021-08-27 | 2021-11-09 | 何平 | Device for continuously producing magnesium oxide and carbon dioxide by roasting magnesite by microwave energy |
| CN115558810B (en) * | 2022-10-29 | 2023-08-15 | 内蒙古新雨稀土功能材料有限公司 | Method and device for extracting rare earth from bastnaesite |
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| CN101423339A (en) * | 2008-11-14 | 2009-05-06 | 太原理工大学 | Method for preparing magnesium calcined dolomite by microwave fluidized bed roaster controlled by microcomputer |
| CN101607791A (en) * | 2009-06-02 | 2009-12-23 | 覃忠 | Utilize microwave heating carbon source calcined limestone to produce the unslaked lime processing method |
| CN203923022U (en) * | 2014-06-26 | 2014-11-05 | 郑州德朗能微波技术有限公司 | The device of a kind of microwave light-calcined magnesite, rhombspar |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101423339A (en) * | 2008-11-14 | 2009-05-06 | 太原理工大学 | Method for preparing magnesium calcined dolomite by microwave fluidized bed roaster controlled by microcomputer |
| CN101607791A (en) * | 2009-06-02 | 2009-12-23 | 覃忠 | Utilize microwave heating carbon source calcined limestone to produce the unslaked lime processing method |
| CN203923022U (en) * | 2014-06-26 | 2014-11-05 | 郑州德朗能微波技术有限公司 | The device of a kind of microwave light-calcined magnesite, rhombspar |
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Address after: 277600 Building 1, high tech Industrial Park, 36 Dongfeng East Road, Weishan Economic Development Zone, Jining City, Shandong Province Patentee after: Shandong paizhi New Energy Technology Co.,Ltd. Address before: 277699 Jin Yuan 2, Jining 4, 2 East Road, No. 15 East Road, East Road, Weishan County, Shandong. Patentee before: SHANDONG DELANGNENG NEW ENERGY TECHNOLOGY CO.,LTD. |
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