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Method for preparing thermal insulation wall material from sodium sulfide slag

A technology for thermal insulation walls and sodium sulfide, applied in the production of ceramic materials, clay products, applications, etc., to achieve the effect of reducing the amount of addition

Active Publication Date: 2019-04-19
SOUTHWEAT UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Stockpiling takes up arable land and there are potential environmental risks

Method used

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  • Method for preparing thermal insulation wall material from sodium sulfide slag
  • Method for preparing thermal insulation wall material from sodium sulfide slag
  • Method for preparing thermal insulation wall material from sodium sulfide slag

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with specific examples.

[0024] (1) Sodium sulfide slag pretreatment: Add water, surfactant, acid, and oxidant to sodium sulfide slag, mix and filter evenly to obtain pretreated sodium sulfide slag. The table below shows 20 examples of sodium sulfide slag pretreatment formula numbers 1-20.

[0025] Table 1

[0026]

[0027] Explanation: The addition amount of sulfuric acid, nitric acid and hydrochloric acid in the table is according to H 2 SO 4 、HNO 3 and HCl calculations.

[0028] (2) Preparation of thermal insulation wall materials: Add activated mud, plasticizer, and heating aid to the pretreated sodium sulfide slag and mix evenly, pour it into a mold and mold it, put it in an oven to dry, and put it in the furnace after drying Calcined to obtain thermal insulation wall material. The following table is 20 embodiments of the wall material formula numbered 1-20.

[0029] Table 2 ...

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Abstract

The invention discloses a method for preparing a thermal insulation wall material from sodium sulfide slag, and the method comprises the following steps: adding water, a surfactant, an acid and an oxidizing agent into the sodium sulfide slag, and uniformly mixing and filtering to obtain pretreated sodium sulfide slag; adding activated sludge, a plasticizer and a heat aid into the pretreated sodiumsulfide slag, uniformly mixing, pouring the mixture into a grinding tool for forming, putting the mixture into a drying oven for drying, drying the mixture, and calcining the mixture in a furnace toobtain the thermal insulation wall material. The surface of the thermal insulation wall material is coated with an enamel material prepared from tailings, so that the functionality of the wall material is increased. 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 wall insulation materials. 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 obtaine...

Claims

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Application Information

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IPC IPC(8): C04B33/132C04B33/13C04B41/86
CPCC04B33/1305C04B33/131C04B33/132C04B33/1321C04B41/5022C04B41/86Y02P40/60
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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