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Method for preparing solid calcium carbide

A calcium carbide, solid-state technology, applied in the chemical industry, can solve the problems of poor heat conduction, not reducing the energy consumption of calcium carbide production, difficult to achieve in industrial production, etc., to increase the specific surface area and contact area, promote mass transfer and heat transfer efficiency, and reduce the reaction. The effect of activation energy

Active Publication Date: 2015-04-29
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this invention uses a liquid method to produce calcium carbide, and the reaction temperature is high, reaching 2200°C, which does not reduce the energy consumption of calcium carbide production. Left and right) liquid calcium carbide is used for molding, which has strict requirements on mold materials and control, and is difficult to realize in industrial production. Finally, the raw material of calcium carbide has poor electrical and thermal conductivity and poor heat conduction.

Method used

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  • Method for preparing solid calcium carbide

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preparation example Construction

[0041] According to the method for preparing solid calcium carbide according to the embodiment of the present invention, the carbon material and the calcium-containing material are finely ground to obtain ultra-fine-grained materials, which can increase the specific surface area and contact area of ​​the material, thereby significantly reducing the activation energy of the reaction in the smelting process. In this way, the production efficiency of calcium carbide can be improved. At the same time, by adding iron powder to the mixed material, it can promote the local generation of a small-scale liquid phase during the smelting process, thereby improving the efficiency of mass transfer and heat transfer. In addition, by strictly controlling the smelting temperature in the material pellet system Below the melting point temperature, the pellets only shrink without softening and melting during the entire smelting process, thus preparing solid calcium carbide, thus avoiding the proble...

Embodiment 1

[0047] The semi-coke and the quicklime are finely ground respectively to obtain the semi-coke powder and the quicklime powder whose average particle size is less than 30 microns and account for more than 98.19%. The industrial analysis of the semi-coke is shown in Table 1, and the CaO content of the quicklime is 90.89wt%, then the blue charcoal powder, quicklime powder and iron powder are transported in the batching tank through gas, and are quicklime powder according to the weight ratio: blue charcoal powder: iron powder=100:85:9 mix, obtain mixture, wherein, The average particle size of the iron powder is not higher than 74 microns and the total iron content is 89.16wt%. Then the prepared mixture is sent to the moistening mill by the airflow, and a water pipe is used to add part of the Molasses (the rotating speed of the moistening mill is 33r / min, and the medium filling rate is 12%) is moistened for 10 minutes to obtain a mixed material, and then the obtained mixed material ...

Embodiment 2

[0052] The anthracite and quicklime with a particle size below 1 mm are finely ground respectively to obtain anthracite powder and quicklime powder with an average particle size of less than 10 microns accounting for more than 95%. Among them, the industrial analysis of anthracite is shown in Table 2. The content is 90.89wt%, then anthracite powder, quicklime powder and iron powder are transported into the batching tank through gas, and mixed according to the weight ratio of quicklime powder: anthracite powder: iron powder=100:85:9 to obtain a mixture, wherein iron The average particle size of the powder is not higher than 74 microns, and then the prepared mixture is sent to the lubricating mill by the air flow, and a part of hot high-temperature asphalt is added to the lubricating mill by using a water pipe at the feeding part of the lubricating mill (the temperature of the asphalt is at 150 ℃, the rotating speed of the moistening mill is 33r / min, the medium filling rate is 12...

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Abstract

The invention discloses a method for preparing solid calcium carbide. The method comprises steps as follows: (1) a carbon material and a calcium containing material are ground fine, so that carbon material powder and calcium containing material powder can be obtained respectively; (2) a mixture containing the carbon material powder, the calcium containing material powder and iron powder is mixed and wet-ground with a bonding agent, and a mixed material is obtained; (3) the mixed material is shaped to obtain a material pellet; (4) the material pellet is smelted at the temperature of 1,200-1,380 DEG C so as to obtain the solid calcium carbide. The solid calcium carbide can be effectively prepared with the method, and the production cost of the calcium carbide is obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular, the invention relates to a method for preparing solid calcium carbide. Background technique [0002] Calcium carbide is an important coal chemical product and basic chemical raw material. It is mainly used in the production of acetylene and acetylene-based chemical products, especially in the production of PVC (polyvinyl chloride). It was once known as the "mother of the organic synthesis industry". my country's energy is characterized by large coal reserves and small oil reserves, so the production of calcium carbide is of great significance to the development of the industrial economy. The output of calcium carbide has increased year by year in the past ten years. [0003] At present, the production of calcium carbide mainly adopts the electric furnace smelting method. The carbon-containing materials and calcium-containing materials with a particle size of 5-30mm are he...

Claims

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Application Information

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IPC IPC(8): C01B31/36
Inventor 吴道洪曹志成任中山王静静薛逊
Owner SHENWU TECH GRP CO LTD
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