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Novel melting reduction iron-making furnace and smelting method thereof

A smelting method and ironmaking furnace technology, applied in furnaces, blast furnaces, blast furnace details, etc., can solve problems affecting the quantity and quality of coke, environmental pollution, coke shortage, etc., to reduce ironmaking costs, improve smelting efficiency, The effect of improving ironmaking efficiency

Inactive Publication Date: 2010-09-08
王志江
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coke is made from main coking coal through high-temperature dry distillation, which consumes a lot of energy and causes environmental pollution
Moreover, with the sharp increase in demand for steel, coke is in short supply, especially because the main coking coal reserves are dwindling, which seriously affects the demand for coke quantity and quality

Method used

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  • Novel melting reduction iron-making furnace and smelting method thereof
  • Novel melting reduction iron-making furnace and smelting method thereof
  • Novel melting reduction iron-making furnace and smelting method thereof

Examples

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Effect test

Embodiment 1

[0028] Embodiment 1. Blast furnace capacity is less than 600m 3

[0029] The particle size of the raw coal and semi-coke is 20-60mm, and the weight ratio of the two is 20:80. It can completely replace coke.

Embodiment 2

[0030] Embodiment 2. blast furnace capacity 600-1000m 3

[0031] The particle size of the raw coal and semi-coke is 10-50mm, and the weight ratio of the two is 20:80. It can replace about 60% of coke.

Embodiment 3

[0032] Embodiment 3. blast furnace capacity 1000-4000m 3

[0033] The particle size of the raw coal and semi-coke is 10-50mm, and the weight ratio of the two is 20:80. It can replace about 50% of coke.

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PUM

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Abstract

The invention relates to a novel melting reduction iron-making furnace and a smelting method thereof. The furnace body has a step-shaped structure with small upside and large underside; hoppers in the furnace top are vertical and spiral, and furnace burdens slip into the furnace through the spiral hoppers from upper and lower three feeding holes of the furnace wall respectively; and an iron outlet at the furnace bottom is a U-shaped siphon type iron outlet pipe communicated with the outside of the furnace, and an electromagnetic switch is arranged on the outer furnace pipe wall of the siphon type iron outlet pipe. The smelting method is characterized in that the furnace burdens mainly comprise iron ores, semi-coke and raw coal; and during feeding, the iron ores are put on the lower layer of the feeding holes, the semi-coke is put on the middle layer, and the raw coal is put on the upper layer. Compared with the traditional blast-furnace smelting method, the method of the invention has the advantages that: the iron-making efficiency is improved by about 20 percent, the iron-making cost is reduced by about 500RMB, the energy is saved by about 30 percent, and the content of harmful elements such as s, p and the like is lower.

Description

technical field [0001] The invention relates to an ironmaking furnace and a smelting method thereof. Background technique [0002] The blast furnace is a traditional equipment for ironmaking, and the basic process of blast furnace ironmaking is the reduction process of iron. In a traditional blast furnace, the furnace body is spindle-shaped from top to bottom, and its lower part shrinks into a trapezoid with a wide top and a narrow bottom. Its smelting principle and method are: using coke as fuel and reduction engraving, iron ore or other non-ferrous oxides are converted from oxide or mineral state (such as Fe 2 o 3 , Fe 3 o 4 , Fe 2 SiO 4 Fe3O 4 .TiO 2 etc.), reduced to liquid pig iron. [0003] In traditional blast furnace ironmaking, the blast furnace is divided into five working areas from top to bottom: massive area, soft melting area, dripping zone, whirling area, and slag-iron accumulation area. The temperature in the blast furnace gradually decreases from ...

Claims

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Application Information

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IPC IPC(8): C21B7/00C21B5/00
Inventor 王志江
Owner 王志江