Steel slag and red mud reaction resource recycling new technology and application

A technology of resource recovery and new process, which is applied in the new process and application field of steel slag and red mud reaction resource recovery and reuse, which can solve the problems of affecting performance and appearance, high cost, secondary pollution, etc., and achieve the effect of increasing added value

Inactive Publication Date: 2020-10-30
BEIJING ZHONGKE JINTENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, as a structural material, due to its high alkali content, red mud will cause frosting when used as a building material, which will affect its performance and appearance; red mud is used as an adsorbent to treat sewage, because it contains heavy metal ions. Leading to the dissolution of heavy metals in red mud into water, causing secondary pollution; and the high cost of recycling valuable metals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Put the dried carbonized rice husk E into the mixture C of steel slag A and red mud B according to the mass ratio, the steel slag A:red mud B=80:20, the mixture C:carbonized rice husk=90:10 (mass ratio) ; Then raise the temperature of the steel slag to 1500°C±50°C, and after it fully reacts, separate the molten iron E from the molten slag F. After natural cooling, analyze its chemical composition according to the standard (YB / T140-2009 steel slag analysis method for cement), and the molten slag F is used to manufacture steel slag cement. Mixture C contains about 30% iron. After adding carbonized rice husk E, the iron content in the slag material after iron recovery is significantly reduced to 0.5%-1%, and the CaO content is reduced from 10.2% to about 0.2%.

Embodiment 2

[0029] Put the dried gangue E into the mixture C of steel slag A and red mud B according to the mass ratio, the steel slag A:red mud B=70:30, the mixture C:carbonized rice husk=95:5 (mass ratio); Then raise the temperature of the steel slag to 1450°C±50°C, and separate the molten iron E from the molten slag F after it fully reacts. After natural cooling, analyze its chemical composition according to the standard (YB / T140-2009 steel slag analysis method for cement), and the molten slag F is used to manufacture steel slag cement. Mixture C contains about 35% iron. After carbonized coconut shell is added, the iron content in the recovered iron slag material is significantly reduced to 1%-2%, and the CaO content is reduced from 9.8% to about 0.1%.

Embodiment 3

[0031] The carbonized rice husk after drying is mixed with the steel slag B according to the mass ratio. The specific ratio of the steel slag B and the carbonized rice husk is: molten steel slag:carbonized rice husk=1:0.3; After fully reacting, the cooled molten slag is crushed and used to manufacture proppant in the petroleum industry. The proppant has a density of 1.45g / cm3 and a compressive strength of 75MPa.

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Abstract

The invention relates to the field of steel slag and red mud solid waste treatment, in particular to a steel slag and red mud component recycling iron and resource recycling technology and application. The technology mainly includes the following steps that red mud B is added into steel slag A, uniform mixing is conducted, a mixture C is obtained, the mixture C is heated to 1200 DEG C-1600 DEG C,a reducing agent D is added into the mixture C, and after the reducing agent D is sufficiently reacted with the mixture C, molten iron E is separated from molten slag F. The molten slag F is subjectedto subsequent treatment, then petroleum fracture ceramsite sand, cement, glass and the like are prepared. The steel slag A can be steel mill molten steel slag or steel slag smashed after cooling. Thered mud is Bayer process red mud. The main components of the reducing agent are carbon and silicon dioxide and are preferably materials such as carbonized rice husks and gangue comprising carbon andsilicon at the same time. The mass ratio of the steel slag and the red mud is 5:95-95:5. The technology is simple and is a resource modification regeneration green short-process technology, and comprehensive utilization of red mud and steel slag resources is sufficiently achieved.

Description

technical field [0001] In order to realize the comprehensive resource utilization of steel slag and red mud, the present invention proposes a new process and application of steel slag and red mud reaction resource recovery and reuse. Background technique [0002] Steel slag is the waste slag produced in the process of iron and steel production. About 12% to 20% steel slag will be produced in the steel production process, which has not been effectively utilized for a long time. Stacked steel slag not only seriously occupies limited land resources, pollutes water and soil, but is also a huge waste of resources. With the increasing hoarding of steel slag every year, steel producers around the world are faced with the challenge of dealing with this problem under the current environmental requirements, and how to make more reasonable use of the advantages of steel slag composition and comprehensively recycle steel slag in the entire steel industry. It plays a particularly impor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B11/00C21B3/06C21B3/04C03C6/10C04B7/147C04B33/138C04B33/132C04B38/08
CPCC03C1/002C04B7/147C04B33/1322C04B33/1328C04B33/138C04B38/08C21B3/04C21B3/06C21B11/00Y02W30/50Y02P10/20Y02P40/10Y02P40/60
Inventor 席君杰兰昊黄传兵广守泉张会峰张伟刚刘正发李树森安钢刘云张宇徐木王凯志席天岳
Owner BEIJING ZHONGKE JINTENG TECH
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