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Smelting process and device of pure iron

A pure iron and process technology, applied in the field of pure iron smelting process and equipment, can solve the problems of difficulty in micro-nano powder, high preparation cost and high energy consumption per ton of iron

Inactive Publication Date: 2009-09-23
丁家伟 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, H 2 The preparation cost is expensive, and H 2 The primary utilization rate is about 25%, the energy consumption per ton of iron is relatively high, and it is still difficult to prepare micro-nano powder in large quantities in industry, and the preparation cost is high
Under the current conditions, this achievement does not yet have industrial application

Method used

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  • Smelting process and device of pure iron
  • Smelting process and device of pure iron
  • Smelting process and device of pure iron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Example 1: figure 1 For the process flow diagram of the present invention, in figure 1 Among them, the process scheme to solve its technical problems is:

[0094] Mix iron-containing raw materials with reducing agent, flux, and catalytic additives, and after mixing, crush them to below 200 meshes to make a mixture; then put the mixture into a ball mill for ball milling to prepare superfine powder, and then conduct ultrafine powder Passivation; add water to the catalytic additive to dissolve to obtain an aqueous solution, mix the superfine powder, aqueous solution and binder together, and mix uniformly to form a pellet material; ignite the fuel in the internal and external heaters in the vertical reduction furnace, and the obtained The prepared pellets are sent into the reduction furnace through the screw feeder, and are evenly and loosely arranged on the grate of the drying bed to dry the pellets. After the pellets are dried, they are roasted. CO, H in the zone and ga...

Embodiment 2

[0115] Example 2: figure 2 It is the first equipment structure diagram of the present invention, in figure 2 Among them, the equipment scheme that the present invention solves its technical problem is:

[0116] This equipment is composed of two systems of reduction equipment and smelting equipment. Wherein the reduction equipment adopts the shaft furnace body structure, and the reduction equipment includes a furnace base (12), an upper furnace body, a lower furnace body, an upper furnace cover, a drying bed furnace grate (25), a sealed feeding device (1), Purification device and waste heat circulation device, the upper furnace body is connected above the furnace base, the lower furnace body is connected below the furnace base, the upper furnace cover is connected to the upper end of the upper furnace body, and the drying bed furnace grate is located on the upper At the upper end of the furnace body, the purification device is connected with the upper furnace body and the l...

Embodiment 3

[0133] Example 3: image 3 It is the second equipment structure diagram of the present invention, in image 3 Among them, the upper furnace body in the reduction equipment includes an inner heating tank 2, a reducing gas outlet 3, an outer heating reduction tank 4, a heating air inlet 5, a refractory brick 7, a refractory fiber 9, a reduction furnace shell 10, and internal and external heating Tank air inlet 11, coal-fired combustion chamber 33, slag discharge chamber 34, internal heating channel 38, heating chamber 39, roasting reduction zone 43, reduction furnace shell, refractory brick layer, external heating reduction tank and internal heating tank are set in sequence , the reduction furnace shell is located at the outermost layer, the inner heating tank is located at the innermost layer, the coal-fired combustion chamber 33 and the slag discharge chamber 34 are located at the lower end of the upper furnace body, and the internal heating channel 38 is located at the inner ...

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Abstract

The invention relates to a smelting process and a device of pure iron, belonging to metallurgical industry steel-making raw material. The process comprises the following steps: mixing iron-containing raw materials with reducing agent, solvent and catalyst to prepare ultra fine powder, mixing to make pelletizing materials, sending the prepared pelletizing materials into a reducing furnace, obtaining metallic pellets after the reduction reaction, and directly adding the reduced pellets into a lining electroslag furnace for being smelted into pure iron. The device comprises an internal-external heating vertical reducing furnace, a lining electroslag furnace and a residual heat recovery system. The invention has the advantages that: firstly, the reduction temperature is low, the speed is high, the energy consumption is reduced, the production cost is lowered, the production efficiency is high, and the uniformity of the quality is good; secondly, the degree of mechanization is high, the procedure is simple, the yield is large, the mass production can be performed; thirdly, the waste of raw materials is reduced, the environment pollution is lowered; fourthly, the source of raw materials adopting iron ore concentrate powder and iron-containing metallurgical waste, the cost is low; fifthly, the waste resource can be recycled so as to save the resource consumption; and sixthly, the high-temperature pellets are directly smelted by adopting the lining electroslag furnace, the heat efficiency is high, the energy consumption is low, the material purity is high and the quality is good, and the device is simple with less investment.

Description

technical field [0001] The invention relates to a ferrous metal smelting method, in particular to a pure iron smelting process and equipment. Background technique [0002] Pure iron refers to a kind of iron with a carbon content less than or equal to 0.025% and a low content of manganese, silicon, sulfur, phosphorus and other harmful elements and oxide inclusions in iron. Pure iron not only has a certain strength, but also has high toughness and high soft magnetic properties, and its electrical conductivity and corrosion resistance are much better than ordinary iron and steel, so it is an excellent choice for electrical alloys and some advanced alloy steels. It is mainly used for the production of metallurgical products that require extremely low carbon content and steel inclusion content, such as electrical steel, electromagnet core, NdFeB magnetic material, electrical silicon steel sheet, superalloy and ultra-low carbon stainless steel. raw materials. [0003] In order t...

Claims

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Application Information

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IPC IPC(8): C21C3/00C22B1/242C21B13/02C22B9/00C21C7/068C21C7/072
CPCY02P10/20
Inventor 丁刚丁家伟
Owner 丁家伟
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