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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AI-Extracted 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 bla...

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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.

Application Domain

Pigment treatment with organosilicon compoundsPigment physical treatment +1

Technology Topic

SlagSurface modification +9

Examples

Experimental program(4)

Example Embodiment

[0026] Example 1

[0027] a. Rinse the fly ash waste residue after acid extraction of aluminum to pH=6 and then dry;

[0028] b. Crush the fly ash waste slag after acid extraction of aluminum to <300 mesh;

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

[0030] d. Take 15 parts of activated 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, vulcanization accelerator M, vulcanization accelerator D, 1.5 parts of any one of vulcanization accelerator TT, vulcanization accelerator H, vulcanization accelerator ZDMC, vulcanization accelerator ZBX or vulcanization accelerator NA-22 into the mixer;

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

[0032] f. After cooling, it is molded in a flat vulcanizer.

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

Example Embodiment

[0034] Example 2

[0035] a. Leach the fly ash waste residue after acid extraction of aluminum to pH=7 and then dry;

[0036] b. Crush the fly ash waste residue after the acid extraction of aluminum to <300 mesh;

[0037] c. Take 2% octadecanoic acid of the dried ash mass, mix, grind, mix uniformly, 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, vulcanization 1.5 parts of accelerator TT, vulcanization accelerator H, vulcanization accelerator ZDMC, vulcanization accelerator ZBX or vulcanization accelerator NA-22 are put into the mixer;

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

[0040] f. After cooling, it is molded in a flat vulcanizer.

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

Example Embodiment

[0042] Example 3

[0043] a. Rinse the fly ash waste residue after acid extraction of aluminum to pH=6.5 and then dry;

[0044] b. Crush the fly ash waste residue after the acid extraction of aluminum to <300 mesh;

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

[0046] d. Combine 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, vulcanization accelerator M, vulcanization accelerator D, 1.5 parts of any one of vulcanization accelerator TT, vulcanization accelerator H, vulcanization accelerator ZDMC, vulcanization accelerator ZBX or vulcanization accelerator NA-22 into the mixer;

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

[0048] f. After cooling, it is molded in a flat vulcanizer.

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

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Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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