Method for preparing plastic filler by taking gasified slag as raw material

A technology for gasification slag and coal gasification slag, which is applied in chemical instruments and methods, magnetic separation, solid separation, etc., can solve the problems of difficult to achieve industrialization, unstable composition of gasification slag, and low dosage, and achieves modification. The effect of improving the effect and crushing efficiency, saving natural mineral resources, and shortening the process flow

Active Publication Date: 2021-06-08
山西奇色环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) The structure is particularly porous and the carbon residue is high;
[0007] (2) The composition of gasification slag is unstable, and the regional differences are large;
[0008] (3) The coal chemical industry is an emerging industry, and the utilization of solid waste has not been put on the agenda
[0015] Compared with fly ash, gasification slag has a high carbon content and a porous structure, which leads to common shortcomings in current research, such as low dosage, high cost, secondary pollution, poor performance, and difficulty in industrialization.

Method used

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  • Method for preparing plastic filler by taking gasified slag as raw material
  • Method for preparing plastic filler by taking gasified slag as raw material
  • Method for preparing plastic filler by taking gasified slag as raw material

Examples

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Effect test

Embodiment 1

[0039] see figure 1 , a method for preparing plastic filler with gasification slag as raw material, has the following steps:

[0040] (1) Raw material pretreatment

[0041] The coal gasification slag is directly treated or the coal gasification slag is prepared into a slurry for treatment. The raw material pretreatment process includes a decarbonization stage, a magnetic separation stage and a dehydration stage; the decarburization is determined according to the actual carbon content in the coal gasification slag Whether the stage is carried out, the decarbonization stage is to use the flotation process or gravity separation process to remove the carbon part of the coal gasification slag. When the carbon content in the coal gasification slag raw material is greater than 5%, it will cause the oil absorption value of subsequent products to be too large , affecting the processing performance of subsequent products, it is necessary to decarburize the coal gasification slag. When ...

Embodiment 2

[0047] combine figure 1 Embodiment 1 is further described and explained in detail. The decarbonization stage, magnetic separation stage, and dehydration stage are freely adjusted and combined according to the content of each component in the coal gasification slag to realize the raw material pretreatment process;

[0048] When the flotation process is adopted in the decarbonization stage, kerosene or light diesel oil is used as a collector, 2-octanol or No. 2 oil is used as a foaming agent, and water circulation is used for flotation; the amount of the foaming agent is 0.005-0.1% of the total amount of slag, and the amount of the collector is 0.02-0.5% of the total amount of coal gasification slag;

[0049] The magnetic separation stage removes various heavy metals such as iron oxide, titanium oxide, manganese oxide, and chromium oxide in the coal gasification slag, and the magnetic field strength of the magnetic separator in the magnetic separation stage is adjustable within ...

Embodiment 3

[0056] In the coal gasification slag produced in the production process of a company, the residual carbon content is 15.3%, the iron oxide content is 3.6%, the manganese oxide content is not detected, and the moisture content is 4%. Flash drying, magnetic separation to remove iron.

[0057] Firstly, the coal gasification slag was made into a slurry with a concentration of 30%, with 0.1% kerosene as a collector and 0.05% 2-octanol as a detonator, and flotation three times; using a wet magnetic separator in a 1.5T Magnetic separation under high intensity once; after concentrating the slurry, use a filter press to dehydrate to a water content of 15%; use flash drying equipment to dry the coal gasification slag after flotation under the conditions of an inlet temperature of 200°C and an outlet temperature of 100°C Then the dried material is fed into the steam kinetic energy mill with a screw feeder, using superheated steam at 0.7MPa and 290°C, the speed of the classifier is 1500rp...

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Abstract

The invention discloses a method for preparing a plastic filler by taking gasified slag as a raw material. The method comprises the following steps: (1) carrying out raw material pretreatment: directly treating the gasified slag or preparing the gasified slag into slurry for treatment, wherein the raw material pretreatment process comprises a decarburization stage, a magnetic separation stage and a dehydration stage; (2) carrying out ultrafine crushing and modification integrated treatment: carrying out ultrafine crushing on the coarsely crushed coal gasified slag subjected to raw material pretreatment by utilizing crushing and modification integrated equipment under the action of a proper auxiliary agent to a certain particle size; and (3) carrying out heat-preservation mixing treatment: fully mixing the crushed ultrafine coal gasified slag at a certain temperature for a period of time, and removing residual water in the material to finally prepare the inorganic filler for the plastic product. The product produced by the invention can replace heavy calcium carbonate, light calcium carbonate, nano calcium carbonate, kaolin, argil and other inorganic fillers commonly used in the current plastic industry, natural mineral resources are saved, and green high-added-value utilization of the coal gasified slag is really realized.

Description

technical field [0001] The invention relates to the technical field of industrial solid waste treatment, in particular to a method for preparing plastic filler by using gasification slag as a raw material. Background technique [0002] Coal gasification technology is one of the core contents of my country's clean coal technology and the foundation of modern coal chemical industry. Using coal chemical technology to convert coal into clean energy such as gas and oil for reuse can not only control the pollution caused by coal burning at the source, but also effectively adjust my country's energy structure of "rich in coal, poor in oil and low in gas". Out of the consideration of environmental protection and energy security, a large number of coal gasification enterprises in China 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 ta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/04B02C21/00B03C1/30B02C23/06B02C23/18B02C25/00B03D1/008B03D101/02B03D101/04
CPCB03B9/04B02C21/00B03C1/30B02C23/06B02C23/18B02C25/00B03D1/008B03D2201/02B03D2201/04
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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