Method for producing iron powder and efficient utilization of steam by semi-steel granulation

Abstract

The invention relates to a method for producing iron powder through a semi-steel granulation method and efficiently utilizing steam. The method involves a preparation device comprising a molten semi-steel injection structure, a rotary granulation system, a cooling system, a metal particle collecting structure, a cooling water collecting structure and a steam collecting structure, wherein a molten semi-steel injection rotary plate in the rotary granulation system is driven to rotate by a drive motor to enable molten semi-steel is granulated, the cooling system is used for cooling metal particles spattering during granulation, the metal particle collecting structure is used for collecting the fallen metal particles, the cooling water collecting structure is used for collecting fallen cooling water, and the steam collecting structure is used for collecting steam in an atomizing chamber. The method includes using the molten semi-steel injection structure for injecting the molten semi-steel into the rotary plate, granulating the rotary granulation system, and collecting the metal particles and the steam. The method has the advantages that the semi-steel is used for producing the iron powder for reducing without the processes of recarburization, desulfurization and alloying, and accordingly energy consumption is reduced greatly, technological process is shortened substantially and production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of metal particle preparation, in particular to a method for producing iron powder by semi-steel granulation and efficient utilization of steam. Background technique [0002] Panzhihua area is rich in titanium resources, and its reserves rank among the forefront of titanium resources in the world. It has become an important way to develop titanium resources in Panxi to obtain titanium-rich raw materials through smelting titanium slag. For smelting process see figure 1 , using titanium concentrate and titanium slag as raw materials, through acid hydrolysis, dissolution reduction, sedimentation, hydrolysis, calcination and other processes to obtain titanium dioxide. [0003] In the acidolysis stage, the acid-material mixture of titanium concentrate, titanium slag particles and concentrated sulfuric acid needs to be blown and stirred by air and stirred by steam; in the dissolution and reduction stage, since t...

AI Technical Summary

Problems solved by technology

[0010] Generally, ferrosilicon is used for alloying treatment, and 25kg of ferrosilicon is needed to produce 1 ton of cast iron, and the alloying process will cause a temperature drop of about 200°C on the semi-steel;

[0011] Add carburizer to the semi-steel to increase the carbon content in the semi-steel, but the sulfur content in the carburizer is high, which increases the burden of subsequent desulfurization and also causes a certain degree of temperature drop;

[0012] Add desulfurizer to semi-steel to increase the sulfur content in semi-steel. For every ton of casting pig iron produced, an average of 13.2kg of desulfurizer is required, which will cause a certain degree of temperature drop

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