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A kind of fly ash aluminum extraction residue/rubber composite material and preparation method thereof

A technology for extracting aluminum and composite materials from fly ash, which is applied in the field of polymer material processing, can solve the problems that rubber cannot play a reinforcing role, the particle size of aluminum-extracting residues from fly ash is coarse, and the vulcanization promotion effect is weakened, so as to improve the vulcanization effect. Delay effect, shorten vulcanization time, enhance the effect of interfacial compatibility

Active Publication Date: 2018-10-02
CHINA SHENHUA ENERGY CO LTD +1
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  • Abstract
  • Description
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Problems solved by technology

In this patent, the grinding method of the aluminum extraction residue from fly ash is directly pulverized after drying. The particle size of the aluminum extraction residue obtained by this method is relatively coarse, only reaching 300 mesh, which cannot play a good reinforcing role in rubber
[0005] The main component of fly ash aluminum extraction residue is amorphous silica. The surface of the particles contains a large number of polar groups of silanol. The surface is hydrophilic and oleophobic, and has poor compatibility with rubber. It is difficult to disperse evenly in rubber, and the performance of rubber products is reduced. At the same time, the silanol on the surface of the fly ash aluminum extraction residue particles has adsorption to the accelerators commonly used in rubber, which weakens the vulcanization promotion effect, causes the prolongation of the vulcanization time of the rubber, and reduces the production efficiency

Method used

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  • A kind of fly ash aluminum extraction residue/rubber composite material and preparation method thereof

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preparation example Construction

[0057] Raw material for the preparation of aluminum extraction residue from fly ash

[0058] The raw material for the preparation of aluminum extraction residue from fly ash is circulating fluidized bed pulverized coal produced by a thermal power plant, and its chemical composition is shown in Table 1.

[0059] Table 1 CFB fly ash chemical composition (wt%)

[0060] SiO 2

Embodiment 1

[0062] Get above-mentioned fluidized bed fly ash (table 1), be pulverized to 200 orders (Taylor standard sieve), add water and make the slurry that solid content is 33wt%, use vertical ring magnetic separator (referring to Chinese patent CN102145905A, and its The whole content is introduced into this paper), magnetically separated twice at a field strength of 15,000 GS, and obtained a filter cake with a solid content of 37.5wt% after press filtration by a plate and frame filter press; adding a concentration of 28wt% to the filter cake The industrial hydrochloric acid is used for acid dissolution reaction, the molar ratio of HCl in hydrochloric acid to alumina in fly ash is 6:1, the reaction temperature is 150°C, the reaction pressure is 0.6MPa, the reaction time is 2h, and the reaction product is separated from solid and liquid to obtain Fly ash acid slag G1.

[0063] Take the above-mentioned fly ash acid slag G1, wash it with water until the pH value is 6-7, filter it, place ...

Embodiment 2

[0065] raw material:

[0066] Rubber 100g, G2 (fly ash aluminum extraction residue) 60g that embodiment 1 makes, sulfur 2.0g, accelerator (accelerator CZ1.5g, accelerator D0.5g), active agent (stearic acid 2.0g, oxidation Zinc 6.0g), anti-aging agent (anti-aging agent 4010NA 2.0g), plasticizer (No. 13 machine oil 3.0g), modification additive (diethylene glycol 2.0g).

[0067] Preparation:

[0068] (1) Wet Grinding G2 to particle size D 90 It is 1.9 μm, and after drying, it is added to a disperser to disperse to obtain a powder of fly ash aluminum extraction residue;

[0069] (2) First, plasticize the rubber on an open rubber mixer, then add anti-aging agent, accelerator and active agent in order, and mix with rubber evenly, then add fly ash aluminum extraction residue powder, Mix the plasticizer and modifying additives evenly, add sulfur at last, after mixing evenly, pound the rubber and lower the tablet to obtain the mixed rubber;

[0070] (3) Cool the mixed rubber for 4 ...

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Abstract

The invention discloses a coal ash aluminum extraction residue / rubber composite material and a preparation method thereof. The coal ash aluminum extraction residue / rubber composite material is prepared from the following raw materials in parts by weight: 100 parts of rubber, 30-60 parts of coal ash aluminum extraction residues, 1.0-2.5 parts of sulfur, 1.3-2.5 parts of an accelerant, 5-9 parts of an active agent, 1-3 parts of an anti-aging agent, 1.5-3 parts of a plasticizer and 0.3-3.0 parts of a modified additive, wherein the modified additive is polyalcohol. According to the coal ash aluminum extraction residue / rubber composite material, the coal ash aluminum extraction residues are used as inorganic fillers to be combined with the rubber to prepare the composite material, and the polyalcohol modified additive is used for improving the performance of the composite material, so that wastes can be turned into wealth, the coal ash aluminum extraction residues are prevented from being directly discharged to cause environmental pollution, the cost of a rubber product can be reduced, comprehensive utilization of the coal ash aluminum extraction residues is realized, and the economic benefit is improved. The preparation method is simple and easy in operation.

Description

technical field [0001] The invention belongs to the field of polymer material processing, and in particular relates to a fly ash aluminum extraction residue / rubber composite material and a preparation method thereof. Background technique [0002] The rapid development of my country's electric power industry has led to an increase in the amount of fly ash discharged, most of which are wet ash, which consume a lot of water. Fly ash is one of the largest industrial wastes in my country. The massive discharge of fly ash will not only occupy a large area of ​​farmland, but also pollute the water environment and atmospheric environment. Therefore, the full use of fly ash has important practical significance for reducing pollution, improving the environment, and saving energy and resources. At present, the acid method can be used to extract alumina from fly ash with high aluminum content. This method effectively utilizes fly ash and alleviates the problem of shortage of bauxite r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L7/00C08L71/02C08K13/08C08K11/00C08K5/053C08K5/06C08K5/09C08K3/22
CPCC08K2201/003C08L7/00C08L91/00C08K13/08C08K11/005C08K5/06C08K5/09C08K2003/2296C08L71/02C08K5/053
Inventor 王永旺严春杰杜艳霞高桂梅罗文君李超王洪权陈雷王强胡珊
Owner CHINA SHENHUA ENERGY CO LTD
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