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Method for producing pure iron and iron-carbon alloy by adopting rotary kiln

An iron-carbon alloy and production method technology, applied in the field of smelting and producing pig iron, can solve the problems of high raw material cost and production cost, large pollution discharge, and low output, and achieve the goal of reducing production cost, reducing energy consumption, and increasing annual output Effect

Pending Publication Date: 2021-12-10
四川阳华环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The technical problem to be solved by the present invention is: the existing production method of pure iron and iron-carbon alloy has high energy consumption, low output, long process, high raw material cost and production cost, and large pollution discharge

Method used

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  • Method for producing pure iron and iron-carbon alloy by adopting rotary kiln

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Experimental program
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Effect test

Embodiment 1

[0055] Step 1: The preparation process is as follows figure 1 As shown, the iron ore and carbon-containing substances are mixed according to the ratio required for the oxygen in the oxide in the iron ore and the carbon replacement reaction, and then put into a mill to be ground into fine powder to become a raw material powder;

[0056] Step 2: Put the raw material powder into the preheater to absorb the heat from the exhaust gas of the rotary kiln and preheat it into the rotary kiln. The pulverized coal is burned to provide heat, and the rotary kiln is turned on at a speed of 1-8 rpm. The raw material powder is in the rotary kiln Heat is absorbed in the tumbling flow, and after reaching the replacement reaction temperature between oxygen in other low melting point oxides and carbon powder in the raw material powder, the oxygen in the low melting point oxide in the raw material powder and carbon powder undergo a replacement reaction to form carbon monoxide gas. A carbon monoxid...

Embodiment 2

[0060] Mix iron ore and carbon-containing substances according to the ratio required for the iron-carbon alloy to be produced by the oxygen in the oxide in the iron ore and the carbon replacement reaction. The preheater absorbs the heat in the exhaust gas of the rotary kiln and preheats it into the rotary kiln. The pulverized coal is burned to provide heat, and the rotating speed of the rotary kiln is 1-3 rpm. The raw material powder absorbs heat in the tumbling flow in the rotary kiln. After reaching the replacement reaction temperature between oxygen in other low melting point oxides and carbon powder in the raw material powder, the oxygen in the low melting point oxide in the raw material powder and carbon powder undergo a replacement reaction to form carbon monoxide gas, and the carbon monoxide gas is heated in the rotary kiln. A carbon monoxide atmosphere is gradually formed in the layer. After reaching the replacement reaction temperature of oxygen in the oxygen in ferri...

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Abstract

The invention discloses a method for producing pure iron and an iron-carbon alloy by adopting a rotary kiln, and solves the problems of high energy consumption, low yield, long process, high raw material cost and production cost and large pollution discharge of the existing production method of the pure iron and the iron-carbon alloy. The method comprises the following steps of: step 1, mixing and refining iron ore and a carbon source according to the proportion for generating pure iron to obtain raw material powder; step 2, adding the raw material powder in the step 1 into the rotary kiln, rotating and heating the rotary kiln to the reaction temperature, and generating a replacement reaction on the raw material powder to generate molten elemental iron and powdery waste residue powder; step 3, discharging the molten elemental iron and the powdery waste residue powder in the step 2 out of the rotary kiln and conducting separation; and step 4, cooling the molten elemental iron to obtain the pure iron. The method has the advantages of energy conservation, environmental protection, low cost, simple process, high product quality and the like.

Description

technical field [0001] The invention relates to the technical field of smelting and producing pig iron, in particular to a method for producing pure iron and iron-carbon alloys by using a rotary kiln. Background technique [0002] The current method of producing pig iron is carried out in a vertical smelting blast furnace. In order to make the tail gas produced after the heating fuel is burned in the blast furnace, the production raw materials outside the blast furnace and in the blast furnace can be smoothly discharged and the heat in the tail gas can be fully absorbed. Therefore, iron ore must be made into suitable iron ore blocks and coke to be made into suitable coke blocks or iron ore powder must be made into suitable balls, which are sintered into iron powder balls with certain strength. Let the iron ore lumps, coke lumps or iron powder balls, coke lumps and iron powder balls form a certain gap ratio in the material column formed in the blast furnace, which is convenie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/08
CPCC21B13/085Y02P10/20
Inventor 时朝友王礼全时永峰
Owner 四川阳华环保科技有限公司