Iron-rich cooled agglomerated pellet and manufacturing technology and purpose of iron-rich cooled agglomerated pellet

Abstract

The invention belongs to the technical field of comprehensive resource utilization and relates to an iron-rich cooled agglomerated pellet, and a manufacturing technology and a purpose of the iron-rich cooled agglomerated pellet. The invention aims at providing the manufacturing technology of the iron-rich cooled agglomerated pellet, which has the advantages of good pelletizing performance, strong knock resistance, improved pulverization situation and high metallic iron yield. The manufacturing technology comprises the steps of (1) predrying, (2) mixing, (3) pelleting, and (4) natural drying. The key improvements of the technology are (1) selection of a binding agent and (2) a natural airing mode. The iron-rich cooled agglomerated pellet prepared by the technology can be used for replacing scrap steel to be applied to a steel converter for smelting. After enrichment sludge replaces the scrap steel, the heat adjustment of the converter is more flexible in comparison with the scrap steel, a slag state in a process is good, slag comes fast, dephosphorization and desulfuration effects are stable, and the total iron yield is 89.29% and reaches an expected level. Compared with the scrap steel, the production technology is superior, and the price is lower.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of resources, relates to the bonding and agglomeration of metallurgical ore powder, in particular to an iron-rich cold solidified pellet and its manufacturing process and application. Background technique [0002] The existing cold-setting pellet processing methods are almost all secondary resources produced by iron and steel plates, such as iron-containing materials, metallurgical dust and industrial by-product resources, using binders or composite adhesives, slaked lime powder, coal powder or other required The ingredients are original, and the balls are made through the processes of raw material drying-feeding-mixing-ball pressing-drying. Such as: [0003] Tongji University uses a composite adhesive to make cold-set pellets, and uses a composite adhesive synthesized by an organic adhesive and an inorganic adhesive to combine with iron concentrate powder and iron-containing sl...

AI Technical Summary

Problems solved by technology

There is no combustion pollution in the whole process of this method, but there is still room for improvement in practical applications such as ball forming performance and strength, product moisture, pulverization rate, etc.

[0006] The drying method in the existing similar technology basically adopts furnace baking, but furnace baking will greatly affect the ball forming performance, strength and metal iron content of the enriched sludge balls, and the anti-beating ability is weak, and the pulverization is serious. Significantly reduced yield rate of metallic iron

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