A method for preparing hot briquettes from low-grade iron and high titanium blast furnace slag

Abstract

The invention discloses a method for preparing hot briquettes from low-grade iron-high-titanium type blast furnace slag, which comprises the following steps: crushing low-grade iron-high-titanium type blast furnace slag, and then successively placing them in a magnetic field of 2000-3000 Gauss and 500-1000 Gauss Magnetic separation to obtain iron slag; crush iron slag, mix iron slag with reducing agent after crushing, and dry to obtain mixture; preheat the mixture at 400-600°C, and then reduce at 1200-1300°C, Then cool to below 200°C, go through magnetic separation and crushing successively to obtain magnetically separated iron; press the magnetically separated iron into briquettes to obtain hot briquettes. The technological process of the present invention is simple and easy to control, rationally utilizes the iron in the low-grade iron and high titanium blast furnace slag, and makes it into a hot briquette, which can be directly put into the furnace for use, effectively solving the difficulty in separating slag and iron in the prior art , high processing costs and easy to produce secondary pollution and other issues.

Description

A method for preparing hot briquette from low-grade iron and high-titanium blast furnace slag technical field The present invention relates to high titanium type blast furnace slag recycling technical field, be specifically related to a kind of low-grade iron high titanium type blast furnace Method for preparing hot briquettes from slag. Background technique In recent years, along with the continuous development of metallurgical industry, a large amount of metallurgical waste residue is produced, and now each scientific research unit is Research on the comprehensive utilization of metallurgical slag is being carried out. The blast furnace slag produced by the iron-making of Guangpan Steel reaches about 4 million tons per year. The composition and ore in the high-titanium type blast furnace slag are relatively complex and belong to man-made ores. To separate the valuable elements in the high titanium type blast furnace slag, It is difficult to make full use of it. At...

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Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a method for preparing hot briquettes from low-grade iron-high-titanium blast furnace slag. , making it into a hot briquette, which can be directly used in the furnace, effectively solving the problems of difficult separation of slag and iron, high processing cost and easy secondary pollution in the prior art

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