Resistance type melting furnace and furnace starting method

A resistive and melting furnace technology, applied in electric furnaces, pot furnaces, furnaces, etc., can solve the problems of slow heating rate and large energy consumption, and achieve the effects of fast heating speed, avoiding ablation, and simple structure

Pending Publication Date: 2020-07-28
武汉美尔汀环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the usual way, a resistance melting furnace needs to consume a lot of energy from a cold state, and the heating rate is slow, and it takes more than 5 days to form a molten pool.

Method used

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  • Resistance type melting furnace and furnace starting method
  • Resistance type melting furnace and furnace starting method
  • Resistance type melting furnace and furnace starting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] In this embodiment, a layer of raw material 10 is laid on the bottom of the furnace body 1. The raw material 10 adopts ordinary silicate glass particles with an average particle size of 5 mm. According to the formula

[0047]

[0048] Known ρ b The bulk density of the raw material 10 particles is 1.2t / m 3 ;

[0049] ρ m It is raw material 10 high temperature melting density 2.4t / m 3 ;

[0050] d is the distance 100mm between the bottom of the first electrode 4 and the bottom of the second electrode 6 and the bottom of the furnace body 1;

[0051] h max The height of discharge port 2 from the bottom of furnace body 1 is 400mm;

[0052] h 1 The minimum limit height for laying raw material 10 is 200mm;

[0053] It can be seen that the laying height of the raw material 10 is H=300mm.

[0054] In this embodiment, the through hole of the plasma torch on the furnace cover is set in the center of the furnace body, the plasma torch is located in the center of the fur...

Embodiment 2

[0063] In this embodiment, a layer of raw material 10 is laid on the bottom of the furnace body 11. The raw material 10 is made of ordinary silicate glass particles with an average particle size of 6 mm. According to the formula

[0064]

[0065] Known ρ b The bulk density of the raw material 10 particles is 1.2t / m 3 ;

[0066] ρ m It is raw material 10 high temperature melting density 2.4t / m 3 ;

[0067] D is the distance 80mm between the bottom of the first electrode 4 and the bottom of the second electrode 6 from the bottom of the furnace body 1;

[0068] h max The height of discharge port 2 from the bottom of furnace body 1 is 400mm;

[0069] h 1 The minimum limit height for laying raw material 10 is 160mm;

[0070] It can be seen from this that the laying thickness of the raw material 10 is H=300mm.

[0071] After the furnace cover 3 is covered, the height of the plasma torch is adjusted so that the bottom of the torch is 100 mm away from the top of the raw ma...

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Abstract

The invention discloses a resistance type melting furnace and a furnace starting method. The resistance type melting furnace comprises a furnace body, a feeding port and a discharging port are formedin the two sides of the furnace body, a furnace cover is arranged on the upper portion of the furnace body, through holes allowing a first electrode, a second electrode and a plasma torch to penetratethrough are formed in the furnace cover, and the first electrode, the second electrode and the plasma torch penetrate through the through holes and extend into the furnace body. The characteristics of high-temperature flame flow, high center temperature and low peripheral temperature of the plasma torch are adopted for melting and heating the furnace starting raw material, the heating speed is high, and ablation of the furnace body lining is avoided; according to the furnace starting method, furnace starting can be completed in a short time, so that the operation mode of the resistance-type melting furnace is changed, intermittent operation can be carried out, flexibility and convenience are achieved, and the application range of the resistance-type melting furnace is enlarged.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a resistance melting furnace and a furnace starting method. Background technique [0002] At present, in the field of environmental protection in developed countries, resistance melting furnaces are often used for vitrification treatment of inorganic waste and nuclear waste. The starting of the resistance melting furnace is to heat the raw materials by an external heat source to form a conductive liquid molten pool, and the electrodes immersed in the molten pool are electrified to heat the raw materials by Joule, and finally form a glass state. The conventionally used external heat sources are usually resistance heating tubes such as silicon carbide rods or silicon molybdenum rods plugged in the raw materials to gradually heat up the raw materials. The heating speed is slow and the heat exchange efficiency is very low. The external heat source is to use the combustion of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B5/02C03B5/03C03B5/033
CPCC03B5/025C03B5/03C03B5/0332
Inventor 徐智徐凯殷亚军
Owner 武汉美尔汀环保科技有限公司
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