CN-116083106-B - Method for reducing grindability index of raw coke

Abstract

The invention discloses a method for reducing raw coke grindability index, which comprises the steps of continuously keeping the heat load of a heating furnace after carbonization feeding is finished, introducing steam or heavy oil into a furnace tube, then sending the steam or heavy oil heated by the heating furnace into a carbonization tower, simultaneously recovering the carbonization tower to micro positive pressure within 30-60 min, maintaining the carbonization reaction temperature of materials, continuously carrying out carbonization reaction, and then sending raw coke discharged from the carbonization tower into the carbonization furnace or a brickkiln for calcination. The invention prepares the raw coke with adjustable grindability index, which is suitable for manufacturers from the raw coke production process and the principle of influencing the grindability index of the raw coke, and reduces the time spent by the manufacturers on raw material selection.

Inventors

• XU XIANGJUN
• WANG YONGTAO
• YAN TIANXIANG
• CHEN XIAOFENG
• YANG HAIXIAO

Assignees

• 宝武碳业科技股份有限公司

Dates

Publication Date

20260505

Application Date

20211108

Claims (4)

1. 1. A method for reducing grindability index of raw coke is characterized in that after the feeding of carbonized raw materials is finished, the heating load of a heating furnace is continuously maintained, the heating furnace is switched to steam or heavy oil for continuous feeding, the steam or heavy oil enters a carbonization tower after being heated by the heating furnace, the carbonization tower is restored to micro positive pressure within 30-60 min, the carbonization reaction temperature of the carbonized raw materials is maintained, the carbonization reaction is continuously carried out, then raw coke discharged from the carbonization tower is sent to the carbonization furnace or a rotary kiln for heat treatment, The micro positive pressure in the carbonization tower is 20-50 kPa, The deep reaction time of the carbonization reaction is 2-8 hours, The carbonization reaction temperature is 450-485 ℃, The heat treatment temperature is 450-485 ℃, and the heat treatment time is 1-2 h.
2. 2. The method for reducing the grindability index of green coke according to claim 1, wherein the steam injection amount is 10-30wt% of the feeding amount of carbonized raw materials.
3. 3. The method for reducing the grindability index of green coke according to claim 1, wherein the input amount of the heavy oil is 5-15 wt% of the feed amount of the carbonized raw material.
4. 4. The method for reducing the grindability index of raw coke according to claim 1, wherein the grindability index of raw coke obtained by the method for reducing the grindability index of raw coke is 40-90.

Description

Method for reducing grindability index of raw coke Technical Field The invention belongs to the technical field of coking production processes, and particularly relates to a method for reducing grindability index of raw coke. Background The concept of grindability index is originally derived from coal, refers to coal particles with the same quality, and is difficult to grind into powder under the condition of consuming the same energy, so that the concept is an important reference basis for coal mine enterprises in the process of grinding and equipment type selection, is a basis for considering the energy consumption in a power plant, and is also suitable for coking factories. The cost reduction and efficiency enhancement are propositions of long-term attack of enterprises, and the problem that a raw material preparation manufacturer needs to solve is solved by supplying raw materials suitable for the production process route of downstream enterprises. Under the current large background of increasing environmental protection pressure, new energy commodities gradually replace traditional commodities with serious pollution, such as new energy automobiles and the like, are necessarily trends. The raw materials of the cathode material serving as one of the components of the lithium battery for the new energy automobile are supplied to a plurality of manufacturers, the technical difficulty of meeting the requirements of the cathode material manufacturers on grinding, crushing process, high yield and the like is solved by the raw material manufacturers, but in the selection of the raw materials of the cathode material, the downstream manufacturers do not find the related technology which can be used for reference at present, and the coke suitable for the process route of the manufacturers is usually selected in sea. Disclosure of Invention Aiming at the defects in the prior art, the invention aims to provide a method for reducing the raw coke grindability index, which is used for preparing raw coke with adjustable grindability index and suitable for manufacturers from the principles of raw coke production process and influence on the raw coke grindability index, so that the time spent by the manufacturers on raw material selection is reduced. In order to achieve the above purpose, the invention adopts the following technical scheme: the invention provides a method for reducing the grindability index of raw coke, which comprises the steps of maintaining the heat load of a heating furnace after the feeding of a carbonization raw material is finished, switching into steam or heavy oil for continuous feeding, heating the steam or the heavy oil by the heating furnace, entering a carbonization tower, recovering the carbonization tower to micro positive pressure within 30-60 min, maintaining the carbonization reaction temperature of the carbonization raw material, continuing the carbonization reaction, and then sending the raw coke out of the carbonization tower into the carbonization furnace or a rotary kiln for heat treatment. Preferably, the injection amount of the steam is 10-30wt% of the feeding amount of the carbonized raw material. Preferably, the input amount of the heavy oil is 5-15 wt% of the feeding amount of the carbonized raw material. Preferably, the micro positive pressure in the carbonization tower is 20-50 kPa. Preferably, the deep reaction time of the carbonization reaction is 2-8 hours. Preferably, the carbonization reaction temperature is 450-485 ℃. Preferably, the heat treatment temperature is 450-485 ℃ and the heat treatment time is 1-2 h. Preferably, the grindability index of the raw coke obtained by the method for reducing the grindability index of the raw coke is 40-90. The antirust product for the chrome-plated plate and the preparation method thereof have the following beneficial effects: 1. According to the method for reducing the raw coke grindability index, the raw coke grindability index is controlled by directly changing the production process route through a raw material manufacturer, the carbonization reaction degree is prolonged, and finally the raw materials required by a downstream manufacturer are prepared, so that the traditional process of selecting the raw materials from the sea by the downstream manufacturer is broken through, the time spent by the manufacturer on raw material selection is reduced, and the research and development progress is hindered; 2. According to the method for reducing the raw coke grindability index, steam or heavy oil is required to be introduced in the treatment process, so that the furnace tube can be decoked, the furnace tube coking is prevented, and the workload of treating the furnace tube after the shutdown is greatly reduced. Detailed Description In order to better understand the above technical solution of the present invention, the technical solution of the present invention is further described below with reference to examples. The method for r