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Oxygen-electricity combined calcium carbide smelting furnace and system

An oxygen-electricity combined and smelting furnace technology, applied in the direction of carbide, calcium carbide, etc., can solve the problems of difficulty in ensuring that the reaction is fully completed and the grade of calcium carbide is low, and achieve the effect of shortening the smelting time, fast smelting process, and promoting full completion.

Active Publication Date: 2017-11-21
WISDRI ENG & RES INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can increase the reaction rate and reduce energy consumption, it is difficult to ensure that the reaction is fully completed, and the grade of calcium carbide produced is relatively low.

Method used

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  • Oxygen-electricity combined calcium carbide smelting furnace and system
  • Oxygen-electricity combined calcium carbide smelting furnace and system

Examples

Experimental program
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Effect test

Embodiment 1

[0021] The embodiment of the present invention relates to an oxygen-electricity combined calcium carbide smelting method, comprising the following steps:

[0022] Step 1, preparing powdery carbon-based raw materials and powdery calcium-based raw materials, and drying the powdery carbon-based raw materials and powdery calcium-based raw materials. Wherein, in the process of preparing raw materials, the particle diameters of the powdered carbon-based raw materials and powdered calcium-based raw materials are controlled within the range of 0.07-1 mm, so that the carbon-based raw materials and calcium-based raw materials are in the form of fine powders with a high surface area. Activity, thereby enhancing the smelting rate of calcium carbide and reducing the reaction temperature. During the drying process, the weight percentage of the moisture in the powdered carbon-based raw material and the powdered calcium-based raw material is controlled below 0.3%, so that the carbon-based raw...

Embodiment 2

[0030] Such as figure 1 , the embodiment of the present invention relates to an oxygen-electricity combined calcium carbide smelting furnace 101, comprising a flash smelting furnace body 1, and a mixing nozzle 2 is arranged on the flash smelting furnace body 1, and the mixing nozzle 2 is connected with a powdery carbon-based Raw material supply mechanism, powdered calcium-based raw material supply mechanism and oxygen-containing gas delivery mechanism, powdery carbon-based raw material, powdered calcium-based raw material and oxygen-containing gas are sprayed into the flash smelting furnace body 1 through the mixing nozzle 2 The reaction forms an oxygen thermal reaction zone 3; the bottom of the flash smelting furnace body 1 has a molten pool in the reaction zone, and the molten pool in the reaction zone extends to one side of the flash smelting furnace body 1 to form a molten pool in the refining zone, and An electrode refining furnace body 9 is arranged above the melting poo...

Embodiment 3

[0036] The embodiment of the present invention relates to an oxygen-electricity combined calcium carbide smelting system, including a calcium carbide smelting furnace 101. The calcium carbide smelting furnace 101 adopts the oxygen-electricity combined calcium carbide smelting furnace 101 provided in Embodiment 2, which will not be repeated here. The mixing nozzle 2 of the oxygen-electricity combined calcium carbide smelting furnace 101 is connected with a powdery raw material supply system 102 and an oxygen-containing gas delivery mechanism; the powdery raw material supply system 102 includes a powdery carbon-based raw material supply mechanism and a powdery calcium-based raw material supply mechanism, The powdery carbon-based raw material supply mechanism includes a carbon-based raw material pulverizing unit and a carbon-based raw material drying unit, and the powdered calcium-based raw material supply mechanism includes a calcium-based raw material pulverizing unit and a calci...

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Abstract

The invention relates to an oxygen-electricity combined calcium carbide smelting furnace, which comprises a flash smelting furnace body, on which a mixing nozzle is arranged, and the mixing nozzle is connected with a powdery carbon-based raw material supply mechanism, a powdery calcium-based raw material supply mechanism and Oxygen-containing gas delivery mechanism; the bottom of the flash smelting furnace has a molten pool in the reaction zone, and the molten pool in the reaction zone extends to one side of the flash smelting furnace body to form a molten pool in the refining zone, and an electrode refining furnace is set above the molten pool in the refining zone The electrode refining furnace body is equipped with electrodes for inserting into the molten pool in the refining area, and the molten pool in the refining area is provided with a discharge port. The present invention adopts the method of flash smelting to produce calcium carbide, which can make full use of the active surface of powdery raw materials, strengthen the reaction process of calcium carbide smelting, reduce the reaction temperature and shorten the reaction time; utilize the high energy density electric energy of the electrodes to accelerate the calcium carbide production reaction process, and Promote the full completion of the calcium carbide reaction.

Description

technical field [0001] The invention belongs to the technical field of calcium carbide production, and in particular relates to an oxygen-electricity combined calcium carbide smelting furnace and a smelting system. Background technique [0002] Calcium carbide is the basic raw material of organic synthetic chemical industry, and its main chemical composition is calcium carbide (CaC 2 ). The production methods of calcium carbide in industry are mainly electrothermal method and oxygen thermal method. [0003] Calcium carbide is smelted by electrothermal method, which converts electric energy into heat energy by means of an electric arc furnace, heats lime and carbon raw materials with a particle size of 5-30 mm, and produces calcium carbide at a high temperature of 2000-2200 °C. Calcium carbide synthesis reaction is a solid-phase endothermic reaction, and the chemical kinetic process takes a long time; due to the small contact area of ​​bulk raw materials, the reaction rate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/942
Inventor 范小刚陈洪智
Owner WISDRI ENG & RES INC LTD
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