Preparation method of filling cementitious material

A cementitious material and dry process technology, which is applied to lime sulfur mixture residue and desulfurization ash to prepare filling cementitious material, and uses steel slag and slag field to solve problems such as no large-scale application, and achieve good social and economic benefits, The effect of high content of waste residue and improving system strength

Active Publication Date: 2019-09-10
ZUNHUA ZHONGHUAN SOLID WASTE COMPREHENSIVE UTILIZATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, its resource application is still in the research stage, and large-scale application has not yet been carried out.

Method used

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  • Preparation method of filling cementitious material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] By weight, mix 50% lime sulfur residue with 50% dry and semi-dry desulfurization ash, and calcinate at 300°C for 50 minutes to obtain modified slag; steel slag, slag, and modified slag are mixed in a ratio of 26:68:6 Grinding to a specific surface area of ​​412m 2 / kg to obtain the cementitious material; carry out the strength test according to GB / T17671-1999 "Cement mortar strength test method (ISO method)".

Embodiment 2

[0018] By weight, mix 60% lime sulfur residue with 40% dry and semi-dry desulfurization ash, and calcinate at 450°C for 10 minutes to obtain modified slag; mix steel slag, slag, and modified slag in a ratio of 43:55:2 Grinding to a specific surface area of ​​496m 2 / kg to obtain the cementitious material; carry out the strength test according to GB / T17671-1999 "Cement mortar strength test method (ISO method)".

Embodiment 3

[0020] By weight, mix 70% lime sulfur residue with 30% dry and semi-dry desulfurization ash, and calcinate at 380°C for 30 minutes to obtain modified slag; mix steel slag, slag, and modified slag in a ratio of 50:40:10 Grinding to a specific surface area of ​​539m 2 / kg to obtain the cementitious material; carry out the strength test according to GB / T17671-1999 "Cement mortar strength test method (ISO method)".

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Abstract

The invention provides a preparation method of a filling cementitious material. The specific steps are as follows: mixing 50%-70% of a lime-sulphur-synthetic-solution residue with 30%-50% of dry and semi-dry desulfurization ash according to weight, performing calcination at 300 DEG C-450 DEG C to obtain a modified slag, and performing grinding on a steel slag, an ore slag and the modified slag according to a ratio of 30-50:40-70:5-20 to obtain the cementitious material. The method has the characteristics of simple process, low energy consumption, high waste slag doping content, low productioncost, and the like, realizes synergetic resource utilization of various industrial waste slags such as steel slag, ore slag, lime-sulphur-synthetic-solution residue, and desulfurization ash, solves the problem of land occupation of waste slags, and reduces environmental pollution.

Description

technical field [0001] The invention relates to a preparation method of filling cementitious material, in particular to a method for preparing filling cementitious material by using steel slag, slag, lime sulfur mixture residue and desulfurization ash. Background technique [0002] Steel slag and slag are solid by-products produced by iron and steel enterprises in the steelmaking process and ironmaking process respectively. At present, my country produces 100 million tons of steel slag and 200 million tons of slag every year. Both steel slag and slag have undergone high-temperature smelting and water quenching, so they all have certain hydration gelling activity. At present, the resource utilization of slag is carried out well. Slag is mainly used to produce slag powder and is widely used as an active mixture material. It is used in cement and concrete, and has become an important construction engineering raw material. Steel slag has a low utilization rate of only about 30%...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/147C04B7/14
CPCC04B7/14C04B7/147C04B7/24Y02P40/10
Inventor 刘振齐张志国张益康李超关中正赵风清
Owner ZUNHUA ZHONGHUAN SOLID WASTE COMPREHENSIVE UTILIZATION CO LTD
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