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Device and method for triple production of iron, sulfur and gas in pyrite smelting process

A smelting process, pyrite technology, applied in the field of coal gas triple production, sulfur, and iron in the pyrite smelting process, can solve the problems of inefficient utilization, etc., to increase annual output, clean utilization, and alleviate sulfur The effect of shortage of resources and natural gas resources

Active Publication Date: 2020-06-19
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Device and method for triple production of iron, sulfur and gas in pyrite smelting process

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Effect test

Embodiment 1

[0043] Method for triple production of iron, sulfur and gas in pyrite smelting process

[0044] 1) In the calcination-coal gasification reaction tower, the particle size of pyrite is 80 μm, calcined at the bottom temperature of 1100 ° C, the reaction time is 30 s, the excess air coefficient is 1.1, and the SO 2 The concentration is 8%. Coal gasification reaction occurs in the middle and upper part of coal powder and coal ash. The reaction temperature is 800°C. Coal gas and coke are mixed, and oxidation-reduction reaction occurs. The temperature of oxidation-reduction reaction is 800°C, and raw gas and reduction reaction products are obtained.

[0045] 2) Step 1) The solid particles obtained in the calcining-coal gasification reaction tower are separated by the iron-based high-temperature separator and the carbon-based high-temperature separator respectively and sent to the iron oxide reduction tower. The oxide undergoes a secondary reduction reaction at a reaction temperature...

Embodiment 2

[0048] Method for triple production of iron, sulfur and gas in pyrite smelting process

[0049] 1) In the calcination-coal gasification reaction tower, the particle size of pyrite is 1mm, the temperature of the bottom is 1200°C, the reaction time is 60s, the excess air coefficient is 1.3, and the SO 2 The concentration is 14%. Coal gasification reaction occurs in the middle and upper part of coal powder and coal ash. The reaction temperature is 900°C. Coal gas and coke are mixed, and oxidation-reduction reaction occurs. The temperature of oxidation-reduction reaction is 900°C, and raw gas and reduction reaction products are obtained.

[0050] 2) Step 1) The solid particles obtained in the calcining-coal gasification reaction tower are separated by the iron-based high-temperature separator and the carbon-based high-temperature separator respectively and sent back to the iron oxide reduction tower. The oxide undergoes a secondary reduction reaction at a reaction temperature of ...

Embodiment 3

[0053] 1) In the calcination-coal gasification reaction tower, the particle size of pyrite is 2mm, the temperature of the bottom is 1300℃, the reaction time is 120s, the excess air coefficient is 1.5, and the SO 2 The concentration is 16%; coal powder and coal ash undergo coal gasification reaction in the middle and upper part, and the reaction temperature is 1000°C. The high-valent oxides of iron generated by calcination at the bottom of the tower are carried by the sulfur-containing flue gas to the middle and upper part of the reaction tower to be mixed with the coal gasification. Coal gas and coke are mixed, and oxidation-reduction reaction occurs. The temperature of oxidation-reduction reaction is 1000°C, and raw gas and reduction reaction products are obtained.

[0054] 2) Step 1) The solid particles obtained in the calcining-coal gasification reaction tower are separated by the iron-based high-temperature separator and the carbon-based high-temperature separator respectiv...

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Abstract

The invention relates to a device and method for joint production of iron, sulfur and gas in the smelting process of pyrite, and belongs to the field of metal smelting. The method comprises the following steps of calcining the pyrite at the bottom part of the interior of a calcining-gasifying reaction tower, enabling pulverized coal and fly ash to generate gasifying reaction at the middle upper part, enabling the sulfur-containing flue gas to carry the high-valence oxide of iron produced by calcining at the tower bottom to the middle upper part of the reaction tower, mixing with the gas and coke produced by gasifying, and generating oxidation and reduction reaction; separating the product by an iron-based high-temperature separator and a carbon-based high-temperature separator, and sendingback into an iron oxide reduction tower; performing secondary reduction reaction on the iron oxide in the iron oxide reduction tower, and producing reduction gas, so as to obtain iron slag; purifyingthe crude gas, so as to obtain the purified gas; enabling a sulfur condenser to condense and recycle the sulfur. The method has the advantages that the joint production of iron, sulfur and gas is realized in the smelting process of the pyrite, and the pyrite can be efficiently and cleanly utilized.

Description

technical field [0001] The invention belongs to the field of metal smelting, and in particular relates to a device and method for triple production of iron, sulfur and gas in the pyrite smelting process. Background technique [0002] my country is rich in pyrite resource reserves, which are mainly used for the preparation of industrial sulfuric acid. The main component of pyrite is iron disulfide, and the efficient and clean utilization of pyrite has not been realized in the smelting and calcination process of pyrite. [0003] Coal gasification technology is one of the ways of clean and efficient utilization of coal. This technology is mainly used to produce city gas, raw material gas for chemical synthesis, and gas for combined cycle power generation. In recent years, with the improvement of environmental protection standards for flue gas emissions from industrial kilns in building materials, ceramics, glass and other industries, the original coal-fired kilns have been cha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/50C01B17/06B01D53/81C10K1/00C10K1/02
CPCB01D53/508B01D2258/0283C01B17/06C01P2006/80C10K1/004C10K1/02
Inventor 马春元夏霄赵希强冯太李军张世珍
Owner SHANDONG UNIV
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