Melt separation furnace reducing system for blowing oxygen and method

A melting furnace, oxygen technology, applied in furnaces, shaft furnaces, furnace types, etc., can solve problems such as complex structures

Pending Publication Date: 2016-11-09
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of the second prior art are: the fluidized bed needs four stages of reduction, and the structure is complex; before entering the melting furnace, it is necessary to form hot-pressed balls from briquettes and then enter the melting furnace

Method used

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  • Melt separation furnace reducing system for blowing oxygen and method
  • Melt separation furnace reducing system for blowing oxygen and method
  • Melt separation furnace reducing system for blowing oxygen and method

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Embodiment

[0050] Mineral powder and a small amount of flux lime powder are put into the mineral powder hopper 1, and are sent into the direct reduction shaft furnace 3 through the speed-regulating feeder 2 at the bottom of the mineral powder hopper 1. The pulverized coal is put into the pulverized coal hopper 11, and the pulverized coal is sent into the reduction shaft furnace 3 through the speed-regulating feeder 12 at the bottom of the pulverized coal hopper 11. Mineral powder, solvent and coal powder fall on the inclined baffle plate 5 and gradually slide down. The high-temperature CO gas coming out of the melting furnace 9 enters the direct reduction shaft furnace 3 through the high-temperature flue gas pipeline 6 . The high-temperature CO gas reacts with the ore powder, and the ore powder generates direct reduced iron powder, and the iron powder enters the melting furnace 9 through the feeding port 7 . Oxygen enters the oxygen lance 8 through the oxygen pipeline 13, and burns with...

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Abstract

The invention relates to a melt separation furnace reducing system for blowing oxygen and a method. The system comprises a reducing shaft furnace, a melt separation furnace and an oxygen gun. The reducing vertical furnace comprises a mineral powder and solvent feeding opening, a pulverized coal feeding opening, a discharging opening and a smoke inlet. A baffle with the adjustable dip angle is arranged in a hearth of the reducing vertical furnace, and the baffle and a supported rotary shaft are of hollow structures. The melt separation furnace comprises a feeding opening, a smoke outlet and a discharging opening, the feeding opening communicates with the discharging opening of the reducing vertical furnace, and the smoke outlet communicates with the smoke inlet of the reducing vertical furnace. A spray gun head of the oxygen gun is arranged in the melt separation furnace, and the oxygen gun stretches into the melt separation furnace from the top of the melt separation furnace. According to the melt separation furnace reducing system for blowing the oxygen and the method, the baffle with the adjustable dip angle is arranged in the reducing vertical furnace to control the mineral powder descending speed and staying time, and the reducing effect of mineral powder is guaranteed.

Description

technical field [0001] The present invention generally relates to a melting furnace reduction system and method, in particular to a melting furnace reduction system and method with oxygen injection. Background technique [0002] Non-blast furnace ironmaking is a direction of steel development, the main purpose is to achieve low-cost smelting and utilization of refractory ore, and also to achieve clean production. In recent years, coal-based smelting reduction and direct reduction + electric furnace melting technology and coal-based direct reduction + gas furnace melting technology have gradually developed into one of the ironmaking process technologies. This process has the advantages of using coal instead of coke, high reduction temperature, and smelting time Short, low energy consumption, low environmental pollution and low investment, etc., are in line with the development status of resources and energy in my country, and have become one of the hot research topics in the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/02C21B13/14
CPCC21B13/023C21B13/0006C21B13/14
Inventor 马政峰陈峨薛逊吴道洪
Owner SHENWU TECH GRP CO LTD
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