Method for preparing high-strength artificial stone from sodium sulfide slag

A technology of sodium sulfide and artificial stone is applied in the field of resource utilization of industrial waste residues to achieve the effects of no secondary pollution, reduced sodium content and low cost

Inactive Publication Date: 2019-04-19
SOUTHWEAT UNIV OF SCI & TECH
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Problems solved by technology

Stockpiling takes up arable land and t

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  • Method for preparing high-strength artificial stone from sodium sulfide slag
  • Method for preparing high-strength artificial stone from sodium sulfide slag

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with specific examples.

[0023] (1) Add a pH stabilizer and microorganisms to the sodium sulfide slag and age for 30-90 days, then add a surfactant and water, stir evenly, and filter to obtain pretreated sodium sulfide slag. The table below shows 20 examples of sodium sulfide slag pretreatment formula numbers 1-20.

[0024] Table 1

[0025]

[0026] (2) High-strength artificial stone: Add metastable substances, alkaline substances, and aggregates to the pretreated sodium sulfide slag, mix them evenly, pour them into abrasive tools, press them into shapes, and cure them in water to obtain high-strength artificial stones.

[0027]

[0028] In Example 1-Example 20, the strength of the artificial stone is greater than 30 MPa.

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Abstract

The invention discloses a method for preparing artificial stone from sodium sulfide slag, and the method comprises the following steps: adding a pH stabilizer and microorganisms into the sodium sulfide slag, uniformly mixing, performing ageing, adding a surfactant and water, uniformly mixing, and filtering to obtain pretreated sodium sulfide slag; and adding a metastable substance, an alkaline substance and an aggregate into the pretreated sodium sulfide slag, uniformly mixing, pouring the mixture into a grinding tool for compression molding, and performing curing in water to obtain the high-strength artificial stone. Compared with the prior art, the method has the characteristics of low production cost, comprehensive utilization of resources and high added value of the product.

Description

technical field [0001] The invention relates to the field of resource utilization of industrial waste slag, in particular to a method for the resource utilization of sodium sulfide slag for preparing high-strength artificial stone. Background technique [0002] High-temperature reduction of sodium sulfate by pulverized coal is currently the main method for domestic production of sodium sulfide. It uses ordinary high-ash coal to reduce sodium sulfate at high temperature (mostly 90% weathered nitric acid) to obtain sodium sulfide "black ash", and then through leaching and sedimentation , washing, evaporation and a series of follow-up treatments to obtain a product with a sodium sulfide content of 60% [Zhao Xiuping, Jing Xiaobing, Su Gang. Research on the preparation of sodium sulfide by one-step method of reducing sodium sulfate from ultra-low ash pure coal[J]. Salt Industry and Chemical Industry , 2015, 44(12): 36-40]. In the production process of sodium sulfide, the slag ob...

Claims

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Application Information

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IPC IPC(8): C04B30/00
CPCC04B30/00C04B2201/50C04B18/0481C04B14/28C04B24/18
Inventor 谭宏斌董发勤李玉香马小玲王进贺小春吴浪张魁宝
Owner SOUTHWEAT UNIV OF SCI & TECH
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