Preparation method of formed semicoke for calcium carbide

A technology of semi-coke and calcium carbide, which is applied in the field of preparation of molded semi-coke for calcium carbide, can solve the problems of semi-coke powder reuse, etc., and achieve the effects of reusing, good cold strength, and improving production efficiency

Inactive Publication Date: 2013-05-08
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to address the deficiencies of the prior art, to provide a low production cost and simple process for the preparation of molding semi-coke using semi-coke powder to produce calcium carbide, and to solve the problem of semi-coke powder reuse

Method used

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  • Preparation method of formed semicoke for calcium carbide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Raw materials for preparing semi-coke

[0023] 1. Semi-coke: The semi-coke used was analyzed by the industrial analysis method of GB / T212-2008 coal, and the results are as follows:

[0024]

[0025] 2. Quicklime: The used quicklime is analyzed for loss on ignition according to GB / T 15057.10-1994, and the loss on ignition content is 5.55%.

[0026] 2. Preparation of semi-coke by double-roll forming process

[0027] 1. Handling of raw materials:

[0028] The semi-coke is made into semi-coke powder with a particle size of less than 3 mm, and the quicklime is made into lime powder with a particle size of less than 1 mm.

[0029] 2. Preparation of molding semi-coke binder:

[0030] Weigh quicklime with a particle size of <1 mm, and add excess water to fully mature the lime. After about 40-50 minutes, filter the supernatant liquid, and take out the lower layer of slurry, that is, the slaked lime slurry, which is used as the forming semi-coke binder.

[0031] 3. The...

Embodiment 2

[0038] Example 2: The raw materials include: semi-coke powder and binder, the addition amount (g) is: 3120 and 880 respectively; the addition ratio (%) is respectively: 78% and 22%; drop strength / %, 1m For: 91.79. Others are the same as in Example 1.

Embodiment 3

[0039] Example 3: The raw materials include: semi-coke powder and binder, the addition amount (g) is: 3040 and 960 respectively; the addition ratio (%) is respectively: 76% and 24%; drop strength / %, 1m For: 78.47. Others are the same as in Example 1.

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Abstract

The invention relates to a preparation method of formed semicoke for calcium carbide, belonging to a method for producing formed semicoke for calcium carbide. The preparation process comprises the following steps: preparing semicoke into semicoke powder of which the particle size is less than 3 millimeters, and preparing quicklime into lime powder of which the particle size is less than 1 millimeter; weighing the quicklime, and adding excessive water to sufficiently slake the lime; filtering the supernatant, and taking the underlayer slaked lime slurry, namely a binding agent; weighing the semicoke powder and the binding agent (the weight percents of the semicoke powder and the binding agent are respectively 70-80% and 20-30%), pouring the binding agent into the semicoke powder, sufficiently stirring, and evenly mixing; pressing the mixture with a roll-type forming machine to obtain spheroidal formed semicoke; and placing the pressed formed semicoke in a briquette carbonization tank, continuously introducing CO2 preheated to 40 DEG C through a heat exchanger into the carbonization tank via the tank bottom for about 7 hours, and determining the dropping strength of the formed semicoke. According to the invention, the reutilization of the semicoke powder is realized, a powder coal forming technology and calcium carbide production are combined, the calcium carbide production process is simplified, and the production cost is lowered.

Description

technical field [0001] The invention relates to a method for producing shaped semi-coke for calcium carbide, in particular to a preparation method for shaped semi-coke for calcium carbide. Background technique [0002] Semi-coke is a semi-coke product that uses weakly caking or non-caking coal with high volatile content as raw material, and removes tar substances and most of the volatile content in coal through carbonization at medium and low temperatures. Semi-coke is also called semi-coke. As a new type of carbon material, due to its characteristics of high fixed carbon, high resistivity, low ash content, low sulfur content, low phosphorus content and low price, it is gradually being promoted and applied in the production of calcium carbide, ferroalloy and other products. To replace expensive metallurgical coke, semi-coke is an important raw material for the metallurgical industry. [0003] Calcium carbide is produced from quicklime and carbon through complex physical and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/12C10L5/36
Inventor 武建军周国莉李国宁胡雪莲张一昕李霞王勇代应杰马江尚晓玲商玉坤蔡志丹石鑫
Owner CHINA UNIV OF MINING & TECH
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