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Modified manganese slag-mineral powder composite gelled material

A technology of composite cementitious material and composite admixture, which is used in clinker production, cement production, etc.

Active Publication Date: 2013-03-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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This technology has not been reported in China

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  • Modified manganese slag-mineral powder composite gelled material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of Composite Admixtures

[0025] Take the manganese slag and dry it at 75°C or naturally until the moisture content is less than 10%. Use a ball mill to grind the dried and pretreated manganese slag for 8 minutes according to the ball-to-material ratio of 3.0 until the specific surface area is greater than 13m 2 / g (determined by nitrogen adsorption BET method), then the ground manganese slag was heated up to 450°C at 40°C / h, kept for 1h and cooled with the furnace, and finally 82wt% manganese slag, 18%Ca(OH) 2 (Slaked lime is required to pass 180 mesh) and mix well to obtain slag cement admixture.

Embodiment 2

[0027] Preparation of Composite Admixtures

[0028] Take the manganese slag and dry it at 85°C or naturally until the moisture content is less than 10%. Use a ball mill to grind the dried and pretreated manganese slag for 6 minutes according to the ball-to-material ratio of 3.5 until the specific surface area is greater than 13m 2 / g (determined by nitrogen adsorption BET method), then the ground manganese slag was heated up to 400°C at 50°C / h, kept for 1.5h and cooled with the furnace, and finally 80wt% manganese slag, 9wt% Ca(OH) 2 , 11% clinker (both slaked lime and clinker are required to pass 180 mesh) and mix well to obtain the slag cement admixture.

Embodiment 3

[0030] Preparation of Composite Admixtures

[0031]Take the manganese slag, and dry it at 95°C or naturally until the moisture content is less than 10%, and use a ball mill to grind the dried and pretreated manganese slag for 4 minutes according to the ball-to-material ratio of 4.0 until the specific surface area is greater than 13m 2 / g (determined by nitrogen adsorption BET method), then the manganese slag after grinding is heated up to 350°C at 60°C / h, and kept warm for 2h to cool with the furnace, finally press 78wt% manganese slag, 22% clinker 180 mesh is required) and mixed evenly to obtain slag cement admixture.

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Abstract

The invention discloses a modified manganese slag-mineral powder composite gelled material. The raw materials of the modified manganese slag-mineral powder composite gelled material comprise 18 to 38 weight percent of composite admixture, 50 to 62 weight percent of mineral slag powder and 0 to 30 percent of clinker. The composite admixture comprises 78 to 82 weight percent of modified electrolytic manganese slag, 0 to 18 weight percent of Ca(OH)2 and 0 to 22 percent of clinker. The modified manganese slag is obtained by the following steps: subjecting electrolytic manganese slag to drying pretreatment till the water content is less than 10 percent; grinding the electrolytic manganese slag subjected to drying pretreatment till the specific surface area is more than 13m<2> / g, wherein the specific surface area is measured by a nitrogen absorption Brunauer-Emmett-Teller (BET) method; and heating the ground manganese slag to 350 to 450 DEG C at a speed of 40 to 60 DEG C / h, keeping temperature and performing furnace cooling to obtain the modified manganese slag-mineral powder composite gelled material. The modified manganese slag-mineral powder composite gelled material is clinker-free or low-clinker green gelled material which can be prepared by mixing a large amount of industrial solid waste (mainly manganese slag and mineral slag).

Description

technical field [0001] The invention belongs to the technical field of resource utilization of industrial solid waste, and specifically relates to a method of firstly activating and modifying the washing filter residue (hereinafter referred to as "manganese residue") in the production process of electrolytic manganese to make a composite admixture, and then mixing it with slag , Composite gelling material prepared from clinker. Background technique [0002] With the continuous development of the national economy and science and technology, urban and rural construction and real estate development have grown rapidly, and the production and application of various building materials have increased significantly. Among them, Portland cement is the most widely used and widely used cementitious material. my country's annual output of cement has exceeded 900 million tons, and clinker output has exceeded 600 million tons. At the same time, it emits 630 million tons of carbon dioxide,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/147
CPCC04B7/147C04B7/19Y02P40/10Y02P40/121C04B7/40
Inventor 彭兵柴立元王佳张强张金龙闵小波杨志辉王海鹰杨卫春
Owner CENT SOUTH UNIV