Iron-containing material treating system and application thereof to treatment of iron-containing materials

Abstract

The invention discloses an iron-containing material treating system and an application thereof to treatment of iron-containing materials. The system comprises a mixing system, a forming system, a drying system, a roasting system and a heating and smelting furnace system, wherein a discharging hole of the mixing system communicates with a feeding hole of the forming system, a discharging hole of the forming system communicates with a feeding hole of the drying system, a discharging hole of the drying system communicates with a feeding hole of the roasting system, and a discharging hole of the roasting system communicates with a feeding hole of the heating and smelting furnace system. The system disclosed by the invention is suitable for treating iron-containing materials such as iron ores, laterite nickel ores, vanadium titano-magnetites, metallurgical dust and non-ferrous smelting slag and has the advantages of low smelting cost, environment friendliness, high product quality, wide raw material applicability, high recovery rate and the like.

Description

technical field [0001] The invention relates to a system for processing iron-containing materials, and further relates to the application of the system in processing iron-containing materials, belonging to the field of processing iron-containing materials. Background technique [0002] At present, blast furnaces and electric furnaces are usually used to separate slag and iron from iron-containing materials. Blast furnace is a type of vertical furnace, which is suitable for processing oxidized pellets or sintered ore, and coke is used as raw material. When using it for ironmaking, there are good technical and economic indicators, simple process, large production capacity, and labor production efficiency. High, low energy consumption, etc., but the blast furnace also has the disadvantages of high requirements for the furnace materials, the need to use coking coal, high energy consumption and low energy utilization efficiency; the electric furnace converts the electric energy i...

AI Technical Summary

Problems solved by technology

[0004] (1) In the smelting furnace, on the one hand, because the hot air flow or even the flame in the heating furnace enters the smelting furnace furnace to directly spray the graphite electrode, the electrode material will be washed away and the electrode consumption will be accelerated; on the other hand, the hot air flow will travel in the smelting furnace If the electrode is blocked on the path, it will cause the air flow to be disturbed

[0005] (2) A large amount of gas will be produced during the metal oxide reduction process, and a large amount of foamy slag will inevitably be produced. After floating, these foamy slag will be driven by the hot air flow that enters the hearth of the smelting furnace through the heating furnace and will block the ventilation with the airflow pipeline, resulting in poor production

[0006] (3) In the heating furnace, the precipitated gas in the smelting furnace is mainly used as fuel gas, and the amount of its generation will fluctuate greatly with the changes in the ratio of materials, coal, coke, etc., resulting in combustion instability and affecting the temperature in the furnace control

Due to the uncontrollable amount of combustible gas, it may cause an explosion accident

[0007] (4) Combustible gas and combustion-supporting air are burned in the heating furnace instead of directly in the furnace of the melting furnace, which inevitably causes heat loss and the heat utilization rate is not high.

[0009] (1) It has the inherent disadvantages of gas-fired smelting furnaces, using radiation heat transfer, low thermal efficiency, difficult to achieve a higher molten pool, low bed utilization, and difficult to achieve large-scale

[0010] (2) It is mainly aimed at the smelting of aluminum ingots, and the applicability of raw materials is narrow. When processing materials with a large amount of slag, since the slag will float above the liquid phase of the metal, and the thermal conductivity of the slag itself is very poor, it will It greatly blocks the conduction of heat from the furnace to the metal phase, resulting in poor mass transfer and heat transfer on the contact surface between the hot metal and the slag, which is likely to cause difficulty in separating the hot metal from the slag, resulting in a decrease in the metal recovery rate. poor production efficiency

[0012] (1) The electrode is still used as the heating element, so its energy consumption is still high;

[0013] (2) It is not possible to adopt different melting and separation methods in different melting sections, so the energy utilization efficiency is not high

Images