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Rotary kiln gas base reduction-total oxygen bath smelting ironmaking device

A molten pool smelting and molten pool melting furnace technology, applied in the field of rotary kiln gas-based reduction-full oxygen molten pool smelting ironmaking equipment, can solve the problems of large-scale, low-cost production, high fuel ratio, etc., and achieve fast smelting speed , less pollutant discharge and high production efficiency

Active Publication Date: 2019-03-29
钢研晟华科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above analysis, the present invention aims to provide a rotary kiln gas-based reduction-full oxygen molten pool smelting ironmaking device, which solves the problems of high fuel ratio and inability to produce large-scale and low-cost production in the non-blast furnace ironmaking process in the prior art question

Method used

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  • Rotary kiln gas base reduction-total oxygen bath smelting ironmaking device

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Embodiment 1

[0034] This embodiment provides a rotary kiln gas-based reduction-full oxygen molten pool smelting ironmaking device, see Figure 1 to Figure 4 , including raw material warehouse, rotary kiln 3, full oxygen melting pool melting furnace 5, pulverized coal warehouse 6, oxygen tank 9, slag tank 8 and molten iron tank 7. Wherein, the raw material warehouse, the rotary kiln 3 and the full-oxygen melting pool melting furnace 5 are connected successively, the slag iron outlet of the full-oxygen melting pool melting furnace 5 is connected with the slag tank 8 and the molten iron tank 7 respectively, and the outlet of the pulverized coal bunker 6 and the The gas outlets of the oxygen tank 9 are all communicated with the air inlet of the full-oxygen melting pool smelting furnace 5; The gas outlet of molten pool smelting furnace 5 communicates with the air inlet of rotary kiln 3 kiln heads.

[0035]During implementation, the smelting raw materials are added to the rotary kiln 3 through ...

Embodiment 2

[0065] This embodiment provides a rotary kiln gas-based reduction-full oxygen molten pool smelting ironmaking method, including the following steps:

[0066] Step 1: The iron ore powder and flux are fed into the rotary kiln through the belt according to the designed ratio, and the iron ore powder is heated and directly reduced by air-based in the rotary kiln to generate kiln tail gas and obtain the pre-reduced charge;

[0067] Step 2: The pre-reduced charge is directly hot-charged into the full-oxygen molten pool melting furnace, and the mixed gas of coal powder and oxygen is injected into the full-oxygen molten pool melting furnace, and the pre-reduced charge is vigorously stirred for final reduction and separation of slag and iron. Generate smelting furnace gas to obtain slag and molten iron. When the molten iron has accumulated to a certain amount, open the iron hole to release molten iron and slag; mix the generated kiln tail gas with smelting furnace gas to obtain mixed ga...

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Abstract

The invention discloses a rotary kiln gas base reduction-total oxygen bath smelting ironmaking device, belongs to the technical field of non-blast furnace ironmaking, and solves the problems of high fuel ratio of a non-blast furnace ironmaking process and incapability of large-scale low-cost production. The rotary kiln gas base reduction-total oxygen bath smelting ironmaking device comprises a rawmaterial silo, a rotary kiln, a total oxygen bath smelting furnace, a pulverized coal bunker, an oxygen tank, a slag pot and a molten iron jar, wherein the raw material silo, the rotary kiln and thetotal oxygen bath smelting furnace are sequentially connected; a slag iron outlet of the total oxygen bath smelting furnace is connected with the slag pot and the molten iron jar; a discharge hole ofthe pulverized coal bunker and an air outlet of the oxygen tank communicate with an air port of the total oxygen bath smelting furnace; an air outlet of the rotary kiln communicates with an air inletof the rotary kiln; and an air outlet of the total oxygen bath smelting furnace communicates with an air inlet of a rotary kiln head. The ironmaking device provided by the invention can be applied tothe reduction of iron mine powder.

Description

technical field [0001] The invention designs a non-blast furnace ironmaking technology, specifically a rotary kiln gas-based reduction-full oxygen molten pool smelting ironmaking device. Background technique [0002] Blast furnace ironmaking is the most important ironmaking process in the world today. It has the characteristics of large production scale, low energy consumption, good pig iron quality and high efficiency. However, there are two main problems in blast furnace ironmaking: first, the raw materials for blast furnace ironmaking require a certain particle size and strength, and iron ore powder needs to be prepared into sinter or pellets before it can be put into the furnace, and the sintering and pelletizing process can Second, blast furnace ironmaking needs to use a large amount of high-quality coke, and the shortage of coking coal resources and the discharge of waste water and gas from the coking process restrict the production of blast furnace ironmaking. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/08
CPCC21B13/0006C21B13/0073C21B13/085
Inventor 高建军万新宇齐渊洪严定鎏林万舟许海川
Owner 钢研晟华科技股份有限公司
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