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Method for preparing rubber filler by modifying coal ash waste slag obtained after extracting aluminum through acid process

A technology of fly ash waste slag and rubber filler, which is applied in the direction of fibrous filler, dyeing physical treatment, dyeing low-molecular organic compound treatment, etc. It can solve the problems of complicated process and the utilization of unburned carbon in ash slag, etc. Achieve the effects of simple process, resource saving and emission reduction

Active Publication Date: 2012-11-14
CHINA SHENHUA ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The above-mentioned method is to further chemically treat the fly ash or alumina extraction slag through alkali-dissolving or acid-dissolving, and then obtain white carbon black or modified filler after surface coating. The process is relatively complicated, and the above-mentioned prior art does not take into account Utilization of unburned carbon in ash

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] a. Drain the fly ash waste slag after the acid method to extract aluminum to pH=6 and then dry;

[0028] b. Grinding the fly ash waste slag after aluminum extraction by acid method to <300 mesh;

[0029] c. Take 1% silane of the mass of the dried ash and mix it, grind it, mix it evenly, and age it for more than 4 hours to obtain the active modified ash;

[0030] d, get 15 parts of active modified ash, 100 parts of EPDM rubber, 85 parts of carbon black, 4 parts of stearic acid, 5 parts of zinc oxide, 1.5 parts of sulfur powder and vulcanization accelerator M, vulcanization accelerator D, Put 1.5 parts of vulcanization accelerator TT, vulcanization accelerator H, vulcanization accelerator ZDMC, vulcanization accelerator ZBX or vulcanization accelerator NA-22 into the mixer;

[0031] e. Mixing at 130°C for 20 minutes;

[0032] f. After cooling, mold in a flat vulcanizer.

[0033] The mechanical properties of the test samples all meet the GB / T528-1998 standard.

Embodiment 2

[0035] a. Drain the fly ash waste slag after the acid method to extract aluminum to pH=7;

[0036] b. Pulverize the fly ash waste slag after aluminum extraction by acid method to <300 mesh;

[0037] c. Mix and grind 2% octadecanoic acid of the dried ash mass, mix evenly, and age for more than 4 hours to obtain active modified ash;

[0038] d. Take 20 parts of modified ash, 100 parts of EPDM rubber, 80 parts of carbon black, 4 parts of stearic acid, 5 parts of zinc oxide, 1.5 parts of sulfur powder, vulcanization accelerator M, vulcanization accelerator D, vulcanize 1.5 parts of accelerator TT, vulcanization accelerator H, vulcanization accelerator ZDMC, vulcanization accelerator ZBX or vulcanization accelerator NA-22 are loaded into the mixer;

[0039] e. Mixing at 130°C for 20 minutes;

[0040] f. After cooling, mold in a flat vulcanizer.

[0041] The mechanical properties of the test samples all meet the GB / T528-1998 standard.

Embodiment 3

[0043] a. Drain the fly ash waste slag after the acid method to extract aluminum to pH=6.5 and then dry;

[0044] b. Pulverize the fly ash waste slag after aluminum extraction by acid method to <300 mesh;

[0045] c. Mix and grind 3% triethanolamine of the dried ash mass, mix evenly, and age for more than 4 hours to obtain active modified ash;

[0046]d, 25 parts of modified carbonized ash, 100 parts of EPDM rubber, 75 parts of carbon black, 4 parts of stearic acid, 5 parts of zinc oxide, 1.5 parts of sulfur powder and vulcanization accelerator M, vulcanization accelerator D, Put 1.5 parts of vulcanization accelerator TT, vulcanization accelerator H, vulcanization accelerator ZDMC, vulcanization accelerator ZBX or vulcanization accelerator NA-22 into the mixer;

[0047] e. Mixing at 130°C for 20 minutes;

[0048] f. After cooling, mold in a flat vulcanizer.

[0049] The mechanical properties of the test samples all meet the GB / T528-1998 standard.

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Abstract

The invention relates to a method for preparing a rubber filler by modifying coal ash waste slag obtained after extracting aluminum through an acid process. The method comprises the following steps: leaching the coal ash waste slag obtained after extracting aluminum through the acid process to be neutral, and then drying; and crushing to 300 meshes, adding an organic modifying agent, mixing at a high speed, grinding and ageing to obtain the rubber filler. The coal ash is made into white carbon black to be used for rubber filler in the prior art. However, according to the invention, amorphous SiO2 in the coal ash waste slag is effectively utilized; and what's more important, unburned carbon contained in the coal ash waste slag is fully utilized and can be partially used for replacing carbon black in the rubber filler, thereby saving energy resources, and reducing emission of carbon dioxide. The unburned carbon is uniformly compounded with amorphous silicon dioxide and is subjected to surface modification, so that the unburned carbon is uniformly dispersed in a rubber matrix and is good in compatibility, stable in performance, simple in process and low in cost. Mechanical properties of a sample are tested, and all the indexes reach the GB3778-94 standard.

Description

Technical field: [0001] The invention relates to comprehensive utilization of fly ash, in particular to a method for preparing rubber filler from waste slag after alumina extraction by high-alumina fly ash by acid method. Background technique: [0002] my country is a country where coal is the main energy source. 76% of electricity is produced by coal. The annual coal consumption exceeds 400 million tons, accounting for 1 / 3 of the country's raw coal output. The total amount of fly ash produced by coal combustion has exceeded 1 billion tons, and is still increasing at a rate of hundreds of millions of tons per year, becoming the largest ash discharge country in the world. Therefore, the comprehensive utilization of fly ash is not only related to the big problem that needs to be solved urgently for the sustainable development of my country's electric power industry and related industries, but also has great significance for protecting land resources, reducing and eliminating po...

Claims

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Application Information

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IPC IPC(8): C09C1/28C09C1/44C09C3/04C09C3/12C09C3/08C08L23/16C08L7/00C08K13/06C08K9/06C08K9/04C08K3/36C08K3/04
Inventor 魏存弟雒锋蒋引珊薛兵孙彦斌李芳菲高钱
Owner CHINA SHENHUA ENERGY CO LTD
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