Method for preparing rubber filler by taking coal gasification slag as raw material

A technology of coal gasification slag and rubber filler, applied in chemical instruments and methods, fibrous filler, chemical industry, etc., can solve the problems of less than 50% comprehensive utilization of gasification slag, large stock of gasification slag, heavy environmental burden, etc. , to achieve the effect of saving natural mineral resources, good matrix affinity and good dispersibility

Pending Publication Date: 2021-03-02
山西奇色环保科技股份有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to statistics, about 60 million tons of gasification slag will be produced in China in 2019, and the annual output of gasification slag will reach 100 million tons by 2022, while the comprehensive utilization of gasification slag is less than 50%
However, with the development of the coal chemical industry, the stock of gasification slag is increasing, which brings a heavy environmental burden to the local area, and has gradually become a problem that must be solved for enterprises and society.

Method used

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  • Method for preparing rubber filler by taking coal gasification slag as raw material
  • Method for preparing rubber filler by taking coal gasification slag as raw material
  • Method for preparing rubber filler by taking coal gasification slag as raw material

Examples

Experimental program
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Effect test

Embodiment 1

[0027] see figure 1 , a kind of method that takes coal gasification slag as raw material to prepare rubber filler, has following steps:

[0028] (1), raw material pretreatment

[0029] Raw material pretreatment includes drying stage, magnetic separation stage, and activation stage. According to the physical and chemical properties of coal gasification slag raw materials, the sequence and combination of drying stage, magnetic separation stage, and activation stage can be freely adjusted; the drying stage is used to remove gas The moisture in the slag raw material should be controlled below 0.8%. The magnetic separation stage is used to control the content of heavy metals in the coal gasification slag. The activation stage uses an activator to activate the residual carbon in the coal gasification slag at high temperature to increase its surface area and surface activity;

[0030] (2), ultra-fine processing

[0031] Carrying out crushing and grading treatment on the coal gasif...

Embodiment 2

[0044] The coal gasification slag from a company in Lu'an, Shanxi has a residual carbon content of 15.3%, iron oxide content of 3.6%, manganese oxide content of 4%, and a moisture content of 4%. The proposed pretreatment process is drying, magnetic separation and activation. First, use a rotary kiln to dry the material, set the temperature at the kiln head to 320°C, set the temperature at the kiln tail to 130°C, and dry to a moisture content of 0.3%; use a dry magnetic separator to magnetically separate once at a magnetic field strength of 1.5T; Using a tubular resistance furnace at 900°C, activate with water vapor as the activator for 30 minutes; then feed the activated material into the steam kinetic energy mill with a screw feeder, use 0.7MPa, superheated steam at 290°C, and use the speed setting A 1500rpm classifier is used to ultrafinely pulverize the material; the modifier uses silane coupling agent (KH570) accounting for 0.3% of the total material, sodium stearate accoun...

Embodiment 3

[0048] The coal gasification slag from a company in Yulin, Shaanxi, has a residual carbon content of 26.3%, an iron oxide content of 4.6%, manganese oxide was not detected, and a moisture content of 7%. The proposed pretreatment process is fluidized bed drying, magnetic separation and activation. First, use a fluidized bed dryer to dry the material, set the inlet temperature to 280°C, set the outlet temperature to 115°C, and dry to a moisture content of 0.5%; use a dry magnetic separator to magnetically separate once at a magnetic field strength of 2.0T ;Use a tubular resistance furnace at 850°C to activate with water vapor and carbon dioxide as activators for 45 minutes; then feed the activated material into the jet mill with a screw feeder, use 1.2MPa compressed air, and use a rotating speed of 2900rpm The classifier carries out superfine pulverization of the material; among them, the modifier adopts silane coupling agent (NXT) accounting for 0.5% of the total material and po...

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Abstract

The invention discloses a method for preparing a rubber filler by using coal gasification slag as a raw material, which comprises the following steps: (1) pretreation of raw material, including a drying stage, a magnetic separation stage and an activation stage, and freely adjusting the sequence and combination of the drying stage, the magnetic separation stage and the activation stage according to different physical properties and chemical properties of the coal gasification slag raw material; (2) ultrafine processing: crushing and grading the coal gasification slag produced in the step (1) so as to process the coal gasification slag to a specific fineness; and (3) performing surface modification: including a modifier coating stage and a heat preservation stage, and finally producing therubber filler. The production process disclosed by the invention is safe and energy-saving, and the produced rubber filler has the advantages of large specific surface area, good dispersity and good matrix affinity, can replace inorganic filler commonly used in the current rubber industry to save natural mineral resources, and realizes green high-added-value utilization of the coal gasification slag.

Description

technical field [0001] The invention relates to the technical field of green application of coal gasification slag, in particular to a method for preparing rubber filler by using coal gasification slag as a raw material. Background technique [0002] my country is a country where coal is the main energy source. Coal reserves are very rich. However, direct combustion of coal results in low energy conversion efficiency and is likely to cause pollution. Coal gasification technology is one of the core contents of my country's clean coal technology, and it is an important means to adjust my country's "rich coal, poor oil and little gas". In consideration of environmental protection and energy security, a large number of domestic coal gasification enterprises have been put into operation in Shaanxi, Shanxi, Xinjiang, Inner Mongolia and other provinces in recent years, and the output is also increasing year by year. The coal chemical industry has begun to take shape in my country. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/44C09C3/04C09C3/06C09C3/08C09C3/10C09C3/12C08K9/06C08K9/04C08K9/02C08K3/22C08K3/04C08K3/36
CPCC01P2004/61C01P2006/12C01P2006/22C08K3/04C08K3/22C08K3/36C08K9/02C08K9/04C08K9/06C08K9/08C08K2003/2206C08K2003/2227C08K2003/2272C08K2201/005C09C1/44C09C3/006C09C3/045C09C3/063C09C3/08C09C3/10C09C3/12Y02P20/10
Inventor 周叶红任冬寅郭晨夫尚志新
Owner 山西奇色环保科技股份有限公司
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