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Method for producing hydrated solidified body, and hydrated solidified body

A manufacturing method and a technology for a solidified body, which are applied in the directions of solid waste management, sustainable waste treatment, climate sustainability, etc., can solve problems such as processing difficulties, and achieve the effect of high durability

Inactive Publication Date: 2015-11-18
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, steelmaking slag tends to expand due to hydration reaction, so it is not suitable for use as civil engineering and construction materials like blast furnace slag, and its handling is difficult

Method used

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  • Method for producing hydrated solidified body, and hydrated solidified body
  • Method for producing hydrated solidified body, and hydrated solidified body
  • Method for producing hydrated solidified body, and hydrated solidified body

Examples

Experimental program
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Effect test

Embodiment

[0051] In this example, the hydrated solidified body was produced using the powdery steelmaking slag whose particle size was adjusted. As the granular steelmaking slag, molten iron pretreatment slag generated when dephosphorizing blast furnace molten iron tapped from a blast furnace is used. In addition, blast furnace granulated slag fine powder and fly ash were used as a binding material, and ordinary Portland cement was used as an alkali stimulating material. The particle size, FM value and D of the steelmaking slag used in the test 10 It is selected as the scope of the present invention and the conditions for comparison. The granularity, FM value, and D at this time 10 are shown in Table 1.

[0052] The powdery steelmaking slag, caking material, alkaline stimulating material and water were kneaded using a mixer in the combination shown in Table 2. In order to evaluate the workability, after the slump of the kneaded product was measured by the slump test method of the Ja...

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Abstract

A method for producing a hydrated solidified body is a method for producing a hydrated solidified body by kneading a granular steel-making slag and a SiO2-containing substance together with water. The method is characterized in that the steel-making slag to be used is one that can have a disintegration rate of 2.5 mass% or less after being immersed in warm water having a temperature of 80˚C for 10 days and has a coarse granule ratio of 4.5 or more, and the SiO2-containing substance to be used is a blast furnace slag fine powder or a mixture of a blast furnace slag fine powder and fly ash.

Description

technical field [0001] The present invention relates to by combining powdery steelmaking slag with SiO 2 A method for producing a hydrated solidified body produced by kneading the substance with water, and a hydrated solidified body. Background technique [0002] Slag generated in the steelmaking process (hereinafter, simply referred to as steelmaking slag) has a high basicity and contains a large amount of free CaO. Therefore, steelmaking slag tends to expand due to hydration reaction, so it is not suitable for use as civil engineering and construction materials like blast furnace slag, and its handling is difficult. Therefore, in recent years, in order to overcome such a situation, a technique of actively utilizing steelmaking slag has been proposed. Specifically, Patent Document 1 describes a method of mixing aggregates containing steelmaking slag with latent hydraulic silica-containing substances and pozzolanic-reactive silica-containing substances containing 50% or mo...

Claims

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Application Information

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IPC IPC(8): C04B28/08C04B18/08C04B18/14C04B22/06C04B22/12C04B22/14C04B24/22C04B24/26
CPCC04B28/082Y02W30/92Y02W30/94Y02W30/91C04B7/02C04B18/08C04B22/062C04B24/226C04B22/064C04B24/2641C04B22/142C04B22/124
Inventor 高桥克则松永久宏渡边圭儿桑山道弘山口公治
Owner JFE STEEL CORP
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