A process for producing needle coke from coal-based raw materials
A process method and needle coke technology, applied in the field of high-quality needle coke production, can solve the problems of large thermal expansion coefficient and low needle coke yield, and achieve the effects of excellent performance, improved raw material properties, and low energy consumption
Active Publication Date: 2019-11-15
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is that in the prior art, the raw material of needle coke needs to undergo high-temperature heat treatment to obtain the polycondensation concentrate, and the high temperature of the polycondensation reaction will cause the polycondensation reaction of part of the β resin in the raw material to generate new quinoline insolubles. As a result, the prepared needle coke has the problems of low yield and large thermal expansion coefficient
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0040] In Example 1, the auxiliary agent is lignin, the mass ratio of the added amount of lignin to the heavy component of coal tar is 0.1:1, the reaction temperature of the ebullated bed reactor is 350°C, the reaction pressure is 10MPa, and the volume space velocity is 0.8h -1, the volume ratio of hydrogen to oil is 800, the reaction temperature of the coking unit is 510°C, and the reaction pressure is 0.13MPa.
Embodiment 2
[0042] Example 2 The properties of the coal tar raw material are the same as in Example 1, and other devices and reaction conditions are also the same as in Example 1, except that the mass ratio of lignin to heavy components of coal tar in Example 2 is 0.2:1.
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Abstract
The invention discloses a technological method for producing needle coke from a coal-based raw material. The method comprises steps as follows: coal tar is firstly subjected to supercritical extraction and separation, and a coal tar light component and a coal tar heavy component are obtained; the pretreated coal tar heavy component obtained after pretreatment of the coal tar heavy component and anauxiliary agent are mixed to enter a boiling-bed reactor, after the reaction, a liquid product is subjected to fractional distillation, and a light component and a heavy component are obtained; the heavy component enters a coking device and is subjected to a coking reaction, and after separation, gas, coked gasoline, coked diesel, coked gas oil and needle coke are obtained. The refined raw material mixture obtained with the method has the advantages of low quinoline insoluble content, low S and N impurity content and the like, and the produced needle coke has the advantages of low coefficientof thermal expansion, low sulfur content, low ash content and the like.
Description
technical field [0001] The invention relates to a process for producing needle coke, in particular to a process for producing high-quality needle coke by using coal series needle coke raw materials. Background technique [0002] Needle coke is a coke with special properties produced during the thermal conversion of coal-based or oil-based raw materials. Needle coke is an important raw material in the carbon industry, which has the advantages of low thermal expansion coefficient and good graphitization performance. After being broken, the shape is needle-like, and it has obvious fibrous structure and high anisotropy under the microscope. Power electrode steelmaking can improve steelmaking efficiency, reduce power consumption, and reduce steelmaking costs, and has significant economic and social benefits. [0003] Needle coke can be divided into coal-based needle coke and petroleum-based needle coke according to the source of raw materials. Among them, coal-based needle coke...
Claims
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IPC IPC(8): C10G53/04
CPCC10G53/04
Inventor 孟兆会陈新杨涛葛海龙刘建锟贾永忠蒋立敬
Owner CHINA PETROLEUM & CHEM CORP
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