Introduction
High Alkali sinter ore is one kind of necessary materials for smelting of steel. In the advantages of large production scale, stable process, high ore utilization rate and lower production cost, sintering pellets are the main burden for blast furnace and have an irreplaceable position in the production and life of human beings.
High Alkali sinter ore is an alkaline granular material that contains a large amount of alkaline substances such as potassium, sodium and calcium, which are mainly derived from the coal gangue gangue before sintering. The presence of high-alkali components and impurities affects the quality of the sinter ore and affects the firing shrinkage performance of sintering pellets.
Type of High Alkali Sinter Ore
1. Black iron ore: The originated iron ore is mainly black or brown, and the iron content is higher. The composition of trace elements of black iron ore is mainly iron and a small amount of silicate and some type of alkali.
2. Light iron ore: The original iron ore is mainly yellow from the inside to the outside, the iron content is low. The composition of trace elements of light iron ore is mainly containing silicate and the alkali component is small.
3. Sulfur ore: The main component of sulfur ore is iron, there are complex sulfides, such as pyrite, marcasite and so on. But it is still containing other minerals, such as silica and alkali component.
Preparing and Smelting Process of High Alkali Sinter Ore
1. Material preparation
The material preparation process of high alkali sinter ore includes crushing, sieving, mixing, etc., and all of them are mainly used to optimize the composition and granulometric composition of the raw materials.
2. Pelletizing
The pelletizing process of high alkali sinter ore mainly includes three steps: agglomeration of iron ore particles, cooling and hardening of pellets, and sintering of pellets.
3. Smelting
The smelting process of high alkali sinter ore mainly includes two parts: smelting process and follow-up treatment process. The smelting is mainly carried out in a blast furnace and its purpose is to improve and refine the raw ore. The follow-up treatment process mainly includes splitting and cooling treatment of sintering ore product.
Conclusion
High Alkali sinter ore is one of the important raw materials for steel production. It has a wide range of applications and can satisfy the different needs of the steel industry in different regions. In the process of preparing and smelting of high alkali sinter ore, proper control of raw material composition, granules and sintering temperature plays an important role. It will ensure the product quality and improve the production capacity of the sintering process.
