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Red mud cement and preparation method thereof

A technology of red mud and cement, which is applied in the direction of cement production, etc., can solve the problem of low utilization rate of red mud and achieve the effects of low cost, high utilization rate and low corrosion of steel

Inactive Publication Date: 2014-04-23
苏州负碳谷材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the shortcoming that the doping of red mud on the market is still seldom and the utilization rate of red mud is not high, the invention provides a kind of red mud cement and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Ingredients: 20% red mud, 15% sandstone, 30% limestone, 2% iron powder, 20% blast furnace slag, and 10% gypsum.

[0010] Manufacturing process: Red mud, sandstone, limestone, and iron powder are ground together to make raw slurry. After adjusting to meet the technical specifications, use the inflow method to remove most of the water in the evaporator, and then enter (or directly spray) to rotate The kiln burns cement clinker at a temperature of 1400 to 1450°C. Clinker, blast furnace slag, and gypsum are mixed and ground in a cement mill to a certain fineness to obtain cement products.

Embodiment 2

[0012] Ingredients: 40% red mud, 30% sandstone, 50% limestone, 5% iron powder, 30% blast furnace slag, and 20% gypsum.

[0013] Manufacturing process: Red mud, sandstone, limestone, and iron powder are ground together to make raw slurry. After adjusting to meet the technical specifications, use the inflow method to remove most of the water in the evaporator, and then enter (or directly spray) to rotate The kiln burns cement clinker at a temperature of 1400 to 1450°C. Clinker, blast furnace slag, and gypsum are mixed and ground in a cement mill to a certain fineness to obtain cement products.

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Abstract

The present invention relates to a red mud cement, which is prepared from the following raw materials, by weight: 20-40% of red mud, 15-30% of sandstone, 30-50% of limestone, 2-5% of iron powder, 20-30% of blast furnace granulating slag, and 10-20% of gypsum. The preparation method comprises: co-grinding red mud, sandstone, limestone and iron powder into a raw slurry, adjusting to meet technical indexes, adopting an inflow method to remove most of water in an evaporator, placing into (or directly spraying into) a rotary kiln to fire a cement clinker at a temperature of 1400-1450 DEG C, and carrying out mixing grinding on the cement clinker, blast furnace granulating slag and gypsum in a cement mill to achieving a certain fineness so as to obtain the cement product. According to the invention, the industrial waste residue utilization rate is high, the cost is low, and the corrosion on iron and steel is low.

Description

Technical field [0001] The invention relates to a building material and a preparation method thereof, in particular to a red mud cement and a preparation method thereof. Background technique [0002] At present, red mud is a polluting waste discharged from the aluminum industry during the extraction of alumina. Generally, for every 1 ton of alumina produced, 1.0 to 2.0 tons of red mud are incidentally produced. As the world's fourth largest alumina producer, China emits millions of tons of red mud every year. A large amount of red mud cannot be fully and effectively used. It can only be stacked on a large area of ​​storage yard, which takes up a lot of land and causes serious pollution to the environment. The world produces about 70 million tons of red mud each year, and my country produces more than 30 million tons of red mud each year. The production of a large amount of red mud has directly and indirectly affected the production and life of human beings in many aspects. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B7/24
CPCY02P40/10
Inventor 孟繁茂
Owner 苏州负碳谷材料科技有限公司
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