Reduction device and method for producing and reducing iron powder from iron concentrate powder

A technology for reducing iron powder and iron ore concentrate, applied in the field of metallurgy, can solve the problems of ineffective utilization of waste heat, high impurity content in products, complex production process, etc., and achieve good environmental and economic benefits, high energy utilization, and improved The effect of product quality and production efficiency

Pending Publication Date: 2019-07-12
LANZHOU ENG & RES INST OF NONFERROUS METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a reducing device for producing reduced iron powder from iron concentrate, so as to solve the technical problems of existing devices such as large floor area, ineffective use of waste heat, and complicated p

Method used

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  • Reduction device and method for producing and reducing iron powder from iron concentrate powder
  • Reduction device and method for producing and reducing iron powder from iron concentrate powder
  • Reduction device and method for producing and reducing iron powder from iron concentrate powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The iron concentrate with TFe=71%, particle size -150 mesh and 11% water content is evenly distributed on the steel belt of the steel belt drying furnace. The material is dried by the high-temperature tail gas from the rotary kiln and then enters the raw material bin. It is countercurrent to the direction of airflow. After the dried flue gas passes through the bag filter, it is introduced into the chimney by the intake fan to meet the standard discharge, and the bag dust is returned to the raw material warehouse for recycling.

[0033] Adjust the upper flap valve so that the material enters the intermediate silo, at the same time close the upper flap valve and open the lower flap valve so that the material enters the rotary kiln along the chute.

[0034] The material turns over and moves forward in the rotary kiln. The rotating speed of the rotary kiln is 0.5r / min. There are 2 turning plates in the rotary kiln. The rotary kiln adopts electric heating, and the temperature...

Embodiment 2

[0041] The iron ore concentrate with TFe=71.5%, particle size -200 mesh, and 8% water content is evenly distributed on the steel belt of the steel belt drying furnace. The material is dried by the high-temperature tail gas from the rotary kiln and then enters the raw material bin. It is countercurrent to the direction of airflow. After the dried flue gas passes through the bag filter, it is introduced into the chimney by the intake fan to meet the standard discharge, and the bag dust is returned to the raw material warehouse for recycling.

[0042]Adjust the upper flap valve so that the material enters the intermediate silo, at the same time close the upper flap valve and open the lower flap valve so that the material enters the rotary kiln along the chute.

[0043] The material turns over and moves forward in the rotary kiln. The rotating speed of the rotary kiln is 1.5r / min. There are 3 turning plates in the rotary kiln. The rotary kiln adopts electric heating, and the temper...

Embodiment 3

[0050] The iron concentrate with TFe=71.5%, particle size -250 mesh, and 8% water content is evenly distributed on the steel belt of the steel belt drying furnace. The material is dried by the high-temperature tail gas from the rotary kiln and then enters the raw material bin. It is countercurrent to the direction of the airflow. After the dried flue gas passes through the bag filter, it is introduced into the chimney by the intake fan to meet the standard discharge, and the bag dust is returned to the raw material warehouse for recycling.

[0051] Adjust the upper flap valve so that the material enters the intermediate silo, at the same time close the upper flap valve and open the lower flap valve so that the material enters the rotary kiln along the chute.

[0052] The material turns over and moves forward in the rotary kiln. The rotating speed of the rotary kiln is 3r / min. There are 4 turning plates in the rotary kiln. The rotary kiln adopts electric heating, and the tempera...

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Abstract

The invention discloses a reduction device and method for producing and reducing iron powder from iron concentrate powder, and belongs to the metallurgical field. The technical problems that an existing device is large in occupied area, cannot effectively use the waste heat, is complicated in production process and the like. The reduction device for producing and reducing the iron powder from theiron concentrate powder comprises a primary feeding mechanism and a rotary kiln; and the two ends of the rotary kiln are provided with a kiln head cover and a kiln tail silo, a hydrogen spray gun is inserted at the tail of the rotary kiln, the kiln tail silo is connected to a rotary type cooling cylinder through a discharging and feeding mechanism, the top of the kiln head cover is connected witha steel belt type dryer, and the steel belt type dryer is connected to the primary feeding mechanism. The mechanism of the reduction device and method is that iron concentrate is dried and then entersthe rotary kiln, the materials are reduced by hydrogen in the rotary kiln and then enter the rotary type cooling cylinder to be cooled, the materials are subjected to subsequent iron powder reductiontreatment after cooled, the environmental problems caused by using coal as a reducing agent are effectively solved, the technological process is greatly shortened, and the product quality and production efficiency are improved.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a reduction device and method for producing reduced iron powder from iron concentrate. Background technique [0002] In many high-tech materials industries today, powder metallurgy is playing an increasingly important role. The growth rate of powder metallurgy materials and products far exceeds that of other materials and products, and they are widely used in transportation, machinery, metallurgy, electric power, environmental protection, electronic information, petrochemical, aerospace, household appliances and nuclear industries, etc. , national economic development and national defense construction are of great significance. [0003] In the powder metallurgy industry, high-purity iron powder is the most widely used metal powder, accounting for about 70% of the powder used in the entire powder metallurgy industry. At present, the reduction method is one of the main produ...

Claims

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Application Information

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IPC IPC(8): B22F9/22C21B13/08
CPCB22F9/22C21B13/0073C21B13/08
Inventor 陈正杨冬伟高首坤武腾郭键柄张琪张亚东卢超丁志广李晓彤惠应武
Owner LANZHOU ENG & RES INST OF NONFERROUS METALLURGY
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