Steel slag grinding production technology and system

Abstract

The invention discloses a steel slag grinding production technology and system. In the production technology, steel slag of which the moisture is less than or equal to 5% and the granularity is less than 80mm is sent into a column grinder to be grinded to obtain fine powder which contains more than 90% of powder of which the granularity is less than 5mm; the fine powder is screened by a vibrating screen; the screened steel slag fine powder is sent into a strong magnetic separation machine by a belt conveyor to remove iron to ensure that the iron content in the steel slag fine powder is below 2%; and the steel slag fine powder subjected to iron removal is sent into a slag vertical mill to be dried and grinded to obtain a steel slag product of which the specific surface area is 4200-4500cm<2> / g. The production system mainly comprises a charging cabin, a column grinder, a vibrating screen, a belt conveyor, a strong magnetic separation machine and a slag vertical mill. The steel slag grinding production system has the advantages of big yield, high grinding efficiency, low use cost and operation cost and obvious power saving effect, and the economic benefit is improved.

Description

technical field

[0001] The invention belongs to the technical field of resource recycling and environmental protection, and relates to a steel slag treatment technology in the iron and steel industry, in particular to a steel slag grinding production process and system. Background technique

[0002] Steel slag is one of the main waste slags of iron and steel enterprises. Its discharge is about 15%~20% of steel production. The annual discharge of steel slag in my country is more than 80 million tons. If it is not treated and comprehensively utilized, steel slag will occupy more and more land, pollute the environment, cause waste of resources, and affect the sustainable development of the steel industry. At present, the effective treatment method is to grind the steel slag finely, then mix it into cement, and use it as building material steel slag cement. The grinding equipment for steel slag in the prior art mainly adopts cone crusher and ball mill. After the cone crusher bre...

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