Process for producing sponge iron and reduced iron powder sponge iron and charging apparatus
a technology of sponge iron and reduced iron powder, which is applied in the direction of charging apparatus, charging manipulation, furniture, etc., can solve the problems of long reduction time required, low productivity, and significant heating energy consumption required for reduction
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##ventive example 1
Inventive Example 1
[0157] In this Inventive Example, an iron oxide layer having a thickness of 50 mm and a reducing-agent layer having a thickness of 50 mm were charged in the form of interwound helices. A cylindrical reaction container was used with a height of 1.8 m and with an inner diameter of 40 cm. A mixture of coke powder having a particle size of up to 1 mm and 16 percent by mass of limestone having an average particle size of about 95 μm was used as the reducing-agent powder. Pulverized mill scale having a particle size of up to 0.1 mm (after pulverizing, the mill scale was screened. The resulting mill scale included 40 percent by mass of particles that can pass through 60 μm mesh) was used as the iron oxide powder. Both mill scale powder and coke powder had an average particle size within a range of 0.05 to 10 mm.
[0158] An apparatus for charging materials as shown in FIG. 4A was used. The charging was performed as follows: The height of the opening of the outlet for iron ...
##ventive example 2
Inventive Example 2
[0160] In this Inventive Example, an iron oxide layer having a thickness of 35 mm and a reducing-agent layer having a thickness of 65 mm were charged in the form of interwound helices. Iron oxide and a solid reducing agent were charged with the same reaction container, material powder, and apparatus for charging materials as Inventive Example 1. The charging was performed as follows: The height of the opening of the outlet for iron oxide powder 15 was adjusted to 35 mm. The height of the opening of the outlet for reducing-agent powder 16 was also adjusted to 65 mm. The rotatable charging cylinder 14b was operated at a rotating speed of 4 rpm and at a rising speed of 400 mm / min.
[0161] As a result of the charging, charged interwound helices each having 17 turns were obtained, wherein the iron oxide layer had a thickness of 35 mm and the layer of solid reducing agent had a thickness of 65 mm. The charged iron oxide weighed 237 kg.
##ventive example 3
Inventive Example 3
[0162] In this Inventive Example, an iron oxide layer having a thickness of 60 mm and a reducing-agent layer having a thickness of 40 mm were charged in the form of interwound helices. Iron oxide and a reducing agent were charged with the same reaction container, material powder, and apparatus for charging materials as Inventive Example 1. The charging was performed as follows: The height of the opening of the outlet for iron oxide powder 15 was adjusted to 60 mm. The height of the opening of the outlet for reducing-agent powder 16 was also adjusted to 40 mm. The rotatable charging cylinder 14b was operated at a rotating speed of 4 rpm and at a rising speed of 400 mm / min.
[0163] As a result of the charging, charged interwound helices each having 17 turns were obtained, wherein the iron oxide layer had a thickness of 60 mm and the layer of solid reducing agent had a thickness of 50 mm. The charged iron oxide weighed 406 kg.
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Abstract
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