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Magnesite/dolomite microwave light-burning device and method

A magnesite and dolomite technology, applied in lime production and other directions, can solve the problems of poor product quality, serious pollution, waste of energy and other problems, and achieve the effects of fast heating speed, high degree of automation and environmental protection

Active Publication Date: 2014-10-01
山东派智新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, light-burned magnesite and dolomite are usually heated by shaft kiln or rotary kiln, using gas or natural gas. This method

Method used

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  • Magnesite/dolomite microwave light-burning device and method
  • Magnesite/dolomite microwave light-burning device and method
  • Magnesite/dolomite microwave light-burning device and method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Example 1: A microwave heating device for light-burning magnesite and dolomite, see Figure 1-3 , Including microwave heating furnace, control circuit and PLC, microwave heating furnace 1 includes furnace body 1-1, inner cavity 1-2, furnace cover 1-6, discharge tube 2 and microwave source 1-10; several microwave sources 1 -10 is uniformly distributed on the outside of the furnace body 1-1 in a circular shape; the inner cavity 1-2 of the microwave heating furnace is a cylindrical cavity, and the cavity 1-2 is equipped with a thermocouple 1-9, and the cavity is wrapped around the heat preservation Material 1-3, the lower part of the inner cavity 1-2 is connected with the discharge pipe 2. The discharge pipe 2 is provided with a discharge valve 2-1; the furnace cover 1-6 is provided with an exhaust pipe 1-4, and the furnace body 1 The bottom of -1 is provided with a drain pipe 1-5; the product of microwave heat treatment is discharged from the discharge port 3 through the di...

Example Embodiment

[0042] Example 2: A method for light-burning magnesite using the microwave device of Example 1, including the following steps (see Figure 1-Figure 6 ):

[0043] (1) In this example, four microwave heating furnaces are used, namely furnace No. 1, furnace No. 2, furnace No. 3 and furnace No. 4. They are connected in parallel through the PLC control circuit to crush magnesite to particles smaller than 20 mm. Measure 300 kg into 4 microwave heating furnaces, cover the furnace cover and seal it well;

[0044] (2) Turn on the microwave heating furnace to heat the materials. The power of the microwave heating furnace is 30-40KW. The output power of the microwave oven is adjusted to make the material heat up at a rate of 5℃ per minute. The temperature in the No. 1, No. 2, No. 3 and No. 4 furnaces are respectively detected to make them After reaching 840°C, keep it at this temperature for 20 minutes; the gas generated during heating is discharged from the exhaust pipe, and the water gene...

Example Embodiment

[0048] Example 3: The method of lightly burning dolomite using the microwave device of Example 1 is basically the same as Example 2, except that:

[0049] (1) In this example, six microwave heating furnaces are used. The six microwave heating furnaces are connected in parallel through the PLC control circuit. After the dolomite is crushed to particles smaller than 20mm, 300 kg are respectively added to the six microwave heating furnaces, and the furnace is covered. Cover and seal well;

[0050] (2) Turn on the microwave heating furnace to heat the materials. Adjust the output power of the microwave oven, make the material heat up at a rate of 10°C per minute, and detect the temperature in the six heating furnaces respectively to reach 860°C, and then keep it at this temperature for 30 minutes;

[0051] (3) After heating, turn off the microwave oven and open the discharge valve. The material will be discharged from the discharge port through the discharge pipe and transported away in...

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Abstract

The invention relates to a magnesite/dolomite microwave light-burning device and method. The method comprises the following steps: pulverizing magnesite/dolomite, putting in a microwave heating furnace, heating the material at the rate of 5-10 DEG C/minute, and keeping the temperature for 20-40 minutes when the temperature reaches 800-880 DEG C; and discharging the product out of a discharge port via a discharge pipe into a material delivery vehicle running on the track, and carrying away, thereby implementing continuous light burning on the magnesite/dolomite. By utilizing microwave heat treatment, the device and method have the advantages of high heating rate, no pollution and uniform heating; and the product has the advantages of high quality, no air pollution, energy saving and environmental protection. By adopting the touch screen and PLC (programmable logic controller) for centralized control, the automation degree of the whole equipment and the technical precision are enhanced, thereby ensuring the product quality. The device and method can implement mass treatment of magnesite/dolomite and industrialized large-scale production, and enhances the production efficiency.

Description

technical field [0001] The invention relates to a device for microwave treatment of mineral raw materials, in particular to a device and method for heat treatment of light-burned magnesite and dolomite by microwave. Background technique [0002] Magnesite and dolomite are important non-metallic mineral raw materials. In addition to being used as refractory materials for more than 80%, they are also raw materials for extracting metallic magnesium and producing other magnesium salts. The necessary step for processing magnesite and dolomite is high temperature light burning, and the products produced by light burning at 700-1000°C are called light burning magnesite and light burning dolomite. According to current research, light-burned magnesite has a wide range of uses, mainly used as fertilizers and animal feed additives to increase the production of root crops; used as raw materials for high-magnesium cement (Sorel cement) and fused magnesia; used as Fillers and additives f...

Claims

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Application Information

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IPC IPC(8): C04B2/10
CPCY02P40/40
Inventor 刘新保贾晓林蔡俊明
Owner 山东派智新能源科技有限公司
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