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Intensified smelting method and system for calcium carbide

A smelting method and calcium carbide technology, applied in the field of calcium carbide intensified smelting methods and systems, can solve problems such as the complexity of oxygen supply devices, achieve the effects of saving power consumption, preventing local overcooling, and reducing the cost of calcium carbide

Pending Publication Date: 2018-04-20
SHENWU ENVIRONMENTAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the Baden Aniline Soda Ash Company in the former Federal Republic of Germany (now BASF) developed the oxythermal calcium carbide process using coke as fuel and conducted a pilot test between 1950 and 1958. After that, countries such as the United States, the Netherlands and North Korea also carried out The pilot test of the oxythermal calcium carbide production technology has achieved a cost reduction of about 50% compared with the electric arc furnace method, but many problems have been encountered in the engineering process, such as the need for an independent oxythermal reaction device, or the oxygen supply device is very complex

Method used

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  • Intensified smelting method and system for calcium carbide
  • Intensified smelting method and system for calcium carbide

Examples

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Effect test

Embodiment 1

[0067] CaO / C mass ratio is 5: 3 limestone and carbonaceous material (the present embodiment is carbon black) enters in the furnace body 4 of calcium carbide furnace through feeding device, and oxygen compound electrode 6 descends and inserts in the mixed material, opens oxygen valve Feed in pure oxygen (oxygen content = 100%), oxygen is sprayed out from the oxygen tube 1 at a certain speed, in this process, the flow rate of oxygen in the tube is controlled at: 60m / s, and the CO / CO 2 for 3. The oxygen tube 1 is a seamless steel pipe, and the hollow electrode 2 is a graphite electrode. Oxygen reacts with part of the carbon raw material in the furnace body 4 to release a large amount of heat, and the CO gas generated at the same time causes the stirring and stirring of the mixed material, and the mixed material is heated to 1200° C., and the oxygen supply is stopped. When the power is turned on, an electric arc is generated between the oxygen composite electrode 6 and the mixed ...

Embodiment 2

[0069] CaO / C mass ratio is 8: 4 limestone and carbonaceous material (the present embodiment is activated carbon) enters in the furnace body 4 of calcium carbide furnace through feeding device, and oxygen composite electrode 6 descends and inserts in the mixed material, opens oxygen valve to pass through Enter oxygen-enriched air (oxygen content ≥ 80%), and the oxygen-enriched air is ejected from the oxygen tube 1 at a certain speed. CO 2 for 4. The oxygen tube 1 is a ceramic tube, and the hollow electrode 2 is a graphite electrode. Oxygen-enriched air reacts with some carbon raw materials in the furnace body 4 to release a large amount of heat. At the same time, the generated CO gas causes the stirring and stirring of the mixed material. The mixed material is heated to 1300° C., and the supply of oxygen-enriched air is stopped. When the power is turned on, an electric arc is generated between the oxygen composite electrode 6 and the mixed material, and the temperature of the...

Embodiment 3

[0071] Limestone and carbon material (graphite in this embodiment) with a mass ratio of CaO / C of 6:3 enter into the furnace body 4 of the calcium carbide furnace through the feeding device, the oxygen composite electrode 6 is lowered and inserted into the mixed material, and the oxygen valve is opened to pass through Inject pure oxygen, and the oxygen is ejected from the oxygen tube 1 at a certain speed. During this process, the flow rate of the oxygen in the tube is controlled at 50m / s, and the CO / CO 2 for 3. The oxygen tube 1 is a ceramic tube, and the hollow electrode 2 is a graphite electrode. Oxygen reacts with part of the carbon raw materials in the furnace body 4 to release a large amount of heat, and the generated CO gas causes the stirring and stirring of the mixed material, and the mixed material is heated to 1250° C., and the oxygen supply is stopped. When the power is turned on, an electric arc is generated between the oxygen compound electrode 6 and the mixed mat...

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Abstract

The invention relates to an intensified smelting method for calcium carbide. The method includes the steps of: adding a mixture of limestone and a carbon material into a calcium carbide furnace, descending and inserting oxygen composite electrodes into the mixture, and introducing oxygen; carrying out exothermic carbon-oxygen reaction on the oxygen and carbon material; ending the carbon-oxygen reaction; subjecting electric current to arc striking in the mixture through the oxygen composite electrodes to heat the mixture, thus generating calcium carbide liquid. The invention also relates to anintensified smelting system for calcium carbide. According to an intensified smelting device of the calcium carbide furnace used in the invention, oxygen pipes are disposed in the electrodes, thus simplifying the structure of an oxygen blowing device. Oxygen is blown into the furnace for carbon-oxygen reaction to release a lot of heat so as to raise the temperature of the furnace material to 1200DEG C, and then energization is carried out for calcium carbide reaction. Chemical energy is utilized to heat the furnace material, power consumption can be saved by 50% or more, and the calcium carbide cost is lowered.

Description

technical field [0001] The present invention relates to the field of smelting, and more specifically, relates to a calcium carbide intensified smelting method and system. Background technique [0002] The traditional electric arc calcium carbide production process uses the heat generated by the arc to react carbon raw materials and lime at a temperature of about 2000-2200 ° C to produce calcium carbide. The production temperature of calcium carbide is very high and the reaction absorbs a large amount of heat. The power consumption is very high, and the production of 1 ton of pure calcium carbide consumes 4000kW·h of electricity. Early calcium carbide production used cheap hydropower, and energy consumption was not an important issue. The proportion of hydropower in the world today is very low. In 2012, my country’s hydropower only accounted for about 17.5% of the total power generation. The production of calcium carbide basically relies on coal power. Considering that the t...

Claims

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Application Information

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IPC IPC(8): C01B32/942
Inventor 李生忠裴芬吴道洪
Owner SHENWU ENVIRONMENTAL TECH CO LTD
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