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New iron-making and steel-making process by one-step method and equipment thereof

A new process and step-by-step technology, applied in the field of one-step iron-smelting and steel-making new technology and its equipment, can solve the problems of inability to discharge slag alone, high one-time investment, complicated operation procedures, etc., and achieve simple structure and low equipment investment. , Reasonable effect of process flow

Inactive Publication Date: 2009-10-21
邢传一
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the cost of converter steelmaking is low, it has the following defects: 1. High one-time investment, many supporting equipment, complicated operation procedures, and high risk; It has a "concave" shape, and its fluidity is poor; 3. It cannot form an effective combination with the ironmaking process

Method used

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  • New iron-making and steel-making process by one-step method and equipment thereof
  • New iron-making and steel-making process by one-step method and equipment thereof
  • New iron-making and steel-making process by one-step method and equipment thereof

Examples

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Effect test

Embodiment 1

[0015] Example 1: The process of the present invention includes iron pellet drying and direct reduction, such as figure 1 As shown, the drying and direct reduction of the iron pellets are carried out in the drying and direct reduction furnace disclosed in the applicant’s patent application number 200810140107.0, titled "A new process for ironmaking without blast furnace". The pellet carrying trolley 5 is pushed by the top cylinder 6 into the drying furnace 7 for iron pellet drying, and then pushed by the top cylinder 10 into the direct reduction furnace 9 for direct reduction, and then pushed out from the direct reduction furnace 9, The directly reduced hot iron pellets are put into the dual-purpose furnace 3 for ironmaking and steelmaking. At the same time, it is equipped with 60-100kg of anthracite lump and slag material for ton of iron. Perform high-pressure oxygen blowing and bottom blowing and stirring in the same direction on the surface to rotate the liquid surface to impl...

Embodiment 2

[0016] Example 2: The iron-making and steel-making dual-purpose furnaces 3 such as figure 2 , image 3 , Figure 4 As shown in the figure, 3-2 is the furnace body. Its main viewing axis is a horizontal ellipse, and it is circular when viewed from above. The top is equipped with a feeding port and a normally closed double flap valve 3-6; furnace body 3- The bottom of 2 is equipped with an iron storage tank 3-8, the upper part of the iron storage tank 3-8 is equipped with a tap hole 3-9; the lower part of the furnace body 3-2 is equipped with a slag removal port 3-3, and the middle part is equipped with a There are several oblique oxygen blowing ports that make oxygen swirl in the furnace. The oxygen blowing ports are divided into medium and low pressure oxygen blowing ports 3-4 and high-pressure oxygen blowing ports 3-7. In the medium and low pressure oxygen blowing iron smelting and high pressure oxygen blowing steel smelting, the upper part of the furnace body 3-2 is provided wi...

Embodiment 3

[0017] Example 3: The carbon dioxide reduction furnace 1 of the process of the present invention Figure 5 As shown, it is composed of connected upper warehouse 1-3 and lower warehouse 1-2. The upper warehouse 1-3 is used to contain coal for carbon dioxide reduction and limestone for desulfurization. The coal port 1-4 is added, the bottom of the upper warehouse 1-3 is equipped with a grate 1-6, and the top is equipped with an exhaust port 1-5; the bottom of the lower warehouse 1-2 is equipped with a dust outlet 1-1, upper and lower The connecting part of the bin is provided with air inlets 1-7.

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Abstract

The invention discloses a new iron-making and steel-making process by a one-step method, which is realized by the following steps: throwing hot iron pellets undergoing direct reduction into a dual-purpose stove for iron-making and steel-making, adding coal and slag charges, first conducting low-pressure oxygen blowing and melting to conduct iron-making, and then conducting high-pressure oxygen blowing and bottom stirring to conduct steel-making, finally carrying out slag discharge and tapping; next, throwing the hot pellets undergoing direct reduction into the dual-purpose stove for iron-making and steel-making, adding the coal and slag charges and circulating the above operations. The process of the invention is reasonable in flows and feasible, realizes iron-making without blast furnace and non-converter steel-making, effectively combines iron-making and steel-making, occupies less floor area, saves investment on equipments, and enjoys high utilization ratio of heat energy and low energy consumption; the energy consumption of per ton steel is reduced by 60-70% compared with the comprehensive energy consumption of per ton steel in traditional process.

Description

Technical field: [0001] The invention belongs to the scope of smelting technology, relates to smelting technology of iron and steel, in particular to a new one-step iron and steelmaking process and equipment. Background technique: [0002] In the prior art, ironmaking and steelmaking are not only different in process, but are also carried out in different equipment. Ironmaking mainly follows the traditional blast furnace ironmaking process. This kind of blast furnace ironmaking process requires sintering and a blast furnace. Although direct reduction and smelting are carried out in a blast furnace, the blast furnace requires a higher temperature, usually 1430-1800 degrees Celsius, and a large amount of coke is required. The chemical reactions are mostly indirect endothermic reactions, so the blast furnace ironmaking process not only requires large equipment investment, but also consumes high energy. In order to solve the above shortcomings of the blast furnace ironmaking process,...

Claims

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Application Information

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IPC IPC(8): C21B13/00C01B31/18C01B32/40
CPCC21C5/56
Inventor 邢传一
Owner 邢传一
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