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Multifunctional microwave heating vacuum furnace

A microwave heating and vacuum furnace technology is applied in the field of multi-functional microwave heating vacuum furnaces, which can solve the problems of ill-considered environmental pollution, inability to carry out microwave heating in depth, and lag in research and development of microwave equipment.

Inactive Publication Date: 2014-05-14
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At present, the mechanism of microwave heating has not been able to be further developed, largely due to the lag in the research and development of microwave equipment, especially the microwave heating equipment that involves process control and online monitoring has certain defects in the design and manufacturing process; and the use process The environmental pollution problems caused by the

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  • Multifunctional microwave heating vacuum furnace

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Experimental program
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Effect test

Embodiment 1

[0023] see figure 1 , the present invention provides a multifunctional microwave heating vacuum furnace, the multifunctional microwave heating vacuum furnace is composed of a metal shell 18, an intermediate insulation layer 13 and an inner container 3; the inner container is composed of a cylindrical structure 3 plus a sealing flange The fully enclosed system formed by the disc 20 and the lower sealing flange 8 is fixed on the supporting frame 2 of the metal outer body. The interior of the inner tank is a vacuum chamber, and a quartz tube 16 is arranged in the vacuum chamber, and the quartz tube 16 is placed in a stainless steel claw. On the type bracket 14; the upper part of the quartz tube 16 is a thermal insulation cover 19, and there are two holes on the thermal insulation cover 19, which are respectively inserted into the thermocouple 17 and the vent pipe connected to the exhaust gas treatment device 1, wherein one end of the thermocouple 17 is inserted into the material i...

Embodiment 2

[0031] The composition of a certain sulfur concentrate in the present embodiment is shown in Table 1.

[0032] Table 1 Chemical composition of a sulfur concentrate / (%, mass fraction)

[0033] Element S TF SiO 2 CaO P 2 o 5 MgO Al 2 o 3 other content 16.25 60.50 4.97 1.32 0.15 1.14 0.15 15.52

[0034] The invention adopts a multifunctional microwave heating vacuum furnace to oxidize and roast certain sulfur concentrate. Add Ca(OH) in tail gas treatment device 1 2 Solution, open the tail gas treatment device 1 at the same time; put 1Kg of material into the long quartz tube container 16, set the temperature at 1000°C, power 10KW, and carry out microwave heating; keep warm for 10 minutes when the set temperature is reached, and turn off the power; cool with the furnace . The contents of TFe and S in the detected reaction product were 65.5% and 0.45% respectively, and the produced SO 2 with C a(OH ) 2 The reaction produces Ca...

Embodiment 3

[0036] The invention uses a multifunctional microwave heating vacuum furnace to perform fluorine-fixing roasting on a rare earth concentrate (grade: 59.21%). Add Ca(OH) in tail gas treatment device 1 2 Solution, turn on tail gas treatment device 1 at the same time; mix according to MgO:ReO=15:1 ingredients, mix well, set temperature at 700°C, microwave power 1KW, carry out microwave heating; keep warm for 5 minutes when the set temperature is reached, turn off the power; Furnace cools. The contents of ReO and F in the reactants and reaction products were detected, and the rare earth decomposition rate was calculated to be 92.5%, and the fluorine fixation rate was 94.3%. produced CO 2 with C a(OH ) 2 The reaction produces CaCO3 , to obtain solid CaCO after drying 3 powder. The experiment took a total of 15 minutes, the reaction time was short, and the fluorine fixation efficiency was high. The changes in temperature, quality, and time during the reaction process can be mon...

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Abstract

The invention discloses a multifunctional microwave heating vacuum furnace comprising a metal housing, a middle insulating layer and an inner tank, wherein a vacuum cavity is formed inside the inner tank; a heating pipe is arranged on the inner tank; a heat-preservation cover is arranged at the upper part of the heating pipe; a thermocouple and a breather pipe are respectively inserted in the heat-preservation cover; the thermocouple is connected with a programmable logic controller (PLC); the breather pipe is respectively connected with a tail gas processing device and a vacuumizing device through a t-branch pipe; the vacuumizing device is connected with the PLC; the heating pipe is arranged on a precise electronic scale; the electronic scale is connected with the PLC; a small pore connected with a protective gas blowing device is arranged in the inner tank; a microwave generator is arranged in a middle heat-preservation layer and connected to the PLC; the PLC is connected with a computer. By using the multifunctional microwave heating vacuum furnace, the automatic control on the processes of synthesis, dissociation and the like of materials in a microwave field under a vacuum condition, the on-line monitoring on parameters such as the temperature, the vacuum degree, the quality, and the heating time, and tail gas recovery are achieved, and the multifunctional microwave heating vacuum furnace is an environmental-friendly and efficient microwave oven and can be used in scientific research and production.

Description

[0001] technical field [0002] The invention relates to a multi-functional microwave heating vacuum furnace, which is used for realizing automatic control, online monitoring of parameters such as temperature, vacuum degree, quality, heating time and tail gas recovery in the process of material synthesis and cracking in a microwave field under vacuum conditions. Background technique [0003] As an unconventional heating method, microwave heating has the advantages of fast heating speed, uniform heating, high heating efficiency, selective heating, and real-time control because it is "body heating". It is widely used in food, medicine, chemical industry, metallurgy and fields such as mining. [0004] In the microwave field, physical and chemical changes occur between the heated substances. Under the action of an alternating magnetic field with a frequency of billions of Hz, the polar molecules rotate rapidly, and the electrical energy is quickly converted into heat energy in ...

Claims

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Application Information

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IPC IPC(8): B01J19/12
Inventor 李解李保卫韩继铖韩磊李成元祖刚杨仲禹
Owner INNER MONGOLIA UNIV OF SCI & TECH