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Composite production process of steam pressured silicated product with steel slag and pyrite tailings

A technology of pyrite tailings and silicate, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of affecting construction progress, low strength, slow hydration speed of steel slag, etc., and achieve effective The effect of utilization, good performance and excellent microstructure

Inactive Publication Date: 2002-07-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method does not make full use of the potential activity of steel slag, which is a waste of resources
[0008] 2. Steel slag is activated or directly used as cement mixture. Due to the slow hydration speed of steel slag, the early strength is low, which affects the construction progress
Due to the low calcium content of steel slag, even high-alkalinity steel slag has much lower calcium content than lime or cement, so its potential activity cannot be fully exerted when used as a calcium raw material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1 Composite and grind steel slag and pyrite tailings in a ratio of 0.1:1 to prepare a composite powder with a fineness of 0.2% of the sieve residue on a square hole sieve of 80 μm, mix with river sand accounting for 70% of the total amount, and stir Uniform, qualified M10 lime-sand bricks produced by autoclaving.

Embodiment 2

[0021] Steel slag and pyrite tailings are compounded and ground at a ratio of 30:1 to obtain a composite powder with a fineness of 80 μm square hole sieve and a percentage of 20% of the sieve residue, mixed with river sand accounting for 70% of the total, stirred evenly, and passed through Autoclave to produce qualified M10 lime-sand bricks.

Embodiment 3

[0023] Steel slag and pyrite tailings are compounded and ground at a ratio of 5:1 to obtain a composite powder with a fineness of 80 μm square hole sieve and a percentage of 10% of the sieve residue, mixed with river sand accounting for 70% of the total, stirred evenly, and passed through Autoclave to produce qualified M15 lime-sand bricks.

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PUM

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Abstract

Steel slag and pryite tailings in the weight ratio of 0.1-30 are mixed, ground and sieved with square-opening sieve to produce 80 micron fineness composite powder, which is used to replace, partially or even completely, gel material for steam pressured process of producing silicate product. The composite of the two industrial waste slag results in superior use effect and the product has tension and breaking strength 20% higher than that using one single slag.

Description

technical field [0001] The present invention relates to the production technology of autoclaved silicate products, to be precise, it involves the compounding and grinding of steel slag and pyrite tailings in proportion, which is used as one of the raw materials for producing autoclaved silicate products, replacing all or part of the Production of gelling materials for autoclaved silicate products, through molding and autoclaving, to produce a variety of autoclaved silicate products. Background technique [0002] The above-mentioned autoclaved silicate products mainly include: autoclaved aerated concrete, autoclaved lime-sand brick, autoclaved silicate concrete block, autoclaved lime-sand silicate board, autoclaved sleeper, autoclaved silicate Pipes and pipe piles, etc. [0003] An existing production method of autoclaved silicate products is to use steel slag as the main raw material, which is activated by wheel milling, mixed with other raw materials, shaped, and autoclave...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/00C04B28/18
CPCC04B20/008C04B28/18Y02W30/91C04B18/12C04B18/142C04B40/024
Inventor 苏达根张志杰
Owner SOUTH CHINA UNIV OF TECH
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