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

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...

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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