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Cementing material based on multiple solid wastes and preparation method thereof

A technology for solid waste and cementitious materials, which is applied in the field of solid waste resource utilization, can solve the problems of large consumption of natural resources, high production cost, complex technological process, etc., and achieves high solid waste utilization rate, low production cost, The effect of simple process flow

Active Publication Date: 2019-12-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, and propose a gelling material based on various solid wastes and its preparation method, so as to solve the problem of only one or two kinds of solid wastes being disposed of in the prior art, and the process flow is complex, which is naturally High resource consumption and high production cost technical problems

Method used

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preparation example Construction

[0012] For the second solution of the present invention, a method for preparing cementitious materials based on various solid wastes is proposed. The steps of the preparation method include: preparing pretreated slag, preparing alkaline liquid, preparing clean slurry and forming maintenance; wherein ,

[0013] The preparation of the above-mentioned pretreatment slag is to mix the shale vanadium extraction tailings and the Bayer process red mud, and then calcinate to obtain the pretreatment slag; wherein, the shale vanadium extraction tailings and the Bayer process red mud powder are mixed and then calcined. Improve the activity of the pretreatment slag to a certain extent, which is helpful for the subsequent reaction; preferably, the calcination temperature is 500-700°C, and the calcination time is 1-3h. Within the range of the calcination temperature and calcination time, the improved Vanadium tailings and Bayer process red mud are fully activated and excessive energy consump...

Embodiment 1

[0021] This embodiment provides a cementitious material based on a variety of solid wastes, the contents of each component of the cementitious material based on a variety of solid wastes are: shale vanadium extraction tailings 15wt%, Bayer process red Mud 25wt%, fly ash 40wt%, sodium hydroxide 4wt%, water glass 6wt%, tap water 10wt%.

[0022]The cementitious material based on various solid wastes is obtained through the following steps, according to the above-mentioned components and their contents:

[0023] Powder refinement: put vanadium extraction tailings from shale, Bayer process red mud and fly ash in an oven, and bake until the quality does not change. After cooling to room temperature, use a vibrating mill to vibrate and grind, and then sieve;

[0024] Preparation of pre-treated slag: Mix vanadium extraction tailings from shale and Bayer process red mud, and calcinate at 500°C for 3 hours to obtain pre-treated slag, cool and set aside.

[0025] Prepare alkaline liquid...

Embodiment 2

[0030] This embodiment provides a cementitious material based on a variety of solid wastes, the contents of each component of the cementitious material based on a variety of solid wastes are: shale vanadium extraction tailings 25wt%, Bayer process red Mud 18wt%, fly ash 32wt%, sodium hydroxide 1wt%, water glass 8wt%, tap water 16wt%.

[0031] The cementitious material based on various solid wastes is obtained through the following steps, according to the above-mentioned components and their contents:

[0032] Powder refinement: put vanadium extraction tailings from shale, Bayer process red mud and fly ash in an oven, and bake until the quality does not change. After cooling to room temperature, use a vibrating mill to vibrate and grind, and then sieve;

[0033] Preparation of pre-treated slag: mix vanadium extraction tailings from shale and Bayer process red mud, calcinate at 600°C for 1.5h to obtain pre-treated slag, cool and set aside;

[0034] Prepare alkaline liquid: sodi...

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Abstract

The invention discloses a cementing material based on multiple solid wastes, which comprises the following components in percentage by mass: 15-40% of shale vanadium extraction tailings, 10-25% of Bayer process red mud, 25-40% of fly ash, 1-4% of sodium hydroxide, 6-10% of water glass and 10-16% of water. The cementing material is obtained by taking the shale vanadium extraction tailings, the Bayer process red mud and the coal ash as main raw materials, the technological process is simple, the production cost is low, the solid waste utilization rate is high, and the obtained cementing materialhas good strength and can be used as a roadbed material, a curing material and a building material.

Description

technical field [0001] The invention belongs to the field of resource utilization of solid waste, and in particular relates to a gelling material based on various solid wastes and a preparation method thereof. Background technique [0002] Vanadium extraction tailings from shale is the waste slag produced after the vanadium-containing shale raw ore is crushed, ore-grinded, roasted with additives, leached and other processes to extract the vanadium contained therein. At present, most vanadium extraction tailings are stored as waste, which not only occupies a large amount of land, but also pollutes soil and water due to the leachate generated during the storage process, which has become an urgent problem to be solved. Chinese patent CN103482890A discloses a method for preparing geopolymers with vanadium extraction tailings as the main raw material, with 55-76wt% of vanadium extraction tailings, 1-5wt% of slaked lime, and 0.3-2wt% of anhydrous sodium sulfate. 10-16 wt% of kaol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26
CPCC04B28/26C04B2201/50C04B18/0481C04B18/0409C04B18/08C04B22/062
Inventor 包申旭张一敏秦磊
Owner WUHAN UNIV OF TECH
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