Method for producing sulfur by using pyrolysis-reducing united technique

A combined technology and pyrolysis technology, which is applied in the field of chemical raw material preparation, can solve the problems of insufficient resource utilization, high energy consumption, and difficult control, and achieve remarkable energy-saving effects, high comprehensive utilization rates, and reduction of carbon consumption.

Active Publication Date: 2013-04-03
新疆中驰恒谊环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are problems such as high energy consumption, insufficient resource utilization, long process and difficult control to varying degrees.

Method used

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  • Method for producing sulfur by using pyrolysis-reducing united technique
  • Method for producing sulfur by using pyrolysis-reducing united technique

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The main raw material that present embodiment adopts and main chemical composition thereof:

[0027] Pyrite: S 18.1%, Fe 23.4%, CaO+MgO 3.5%, SiO 2 31.1%,

[0028] Al 2 o 3 16.3%, As 0.032%;

[0029] Anthracite: C 固 70.5%, V f 10.3%, A f 17.7%

[0030]The pyrite ore with a sulfur content of 18.1% is processed into granular materials with a particle size of 2 mm or less through a crusher, and 280 kg of pyrite granular materials are sent into a section of pyrolysis reduction flow at a speed of 80 kg per hour by the pyrite feeder 5 In chemical bed 1; at the same time, 17.5 kg of anthracite coal powder with a particle size of 2 mm or less is fed by the coal feeder 4 at a rate of 5 kg per hour, and the pyrite is pyrolyzed and reduced at a temperature of 800-850 ° C to obtain a sulfur content of 9.6%. A total of 185 standard cubic meters of first-stage furnace gas, the first-stage furnace gas passes through the dust removal cooler 6 to remove most of the mine dust...

Embodiment 2

[0034] The main raw materials used in this test and their main chemical composition:

[0035] Pyrite: S 36.5%, Fe 35.2%, CaO+MgO 2.3%, SiO 2 17.1%,

[0036] al 2 o 3 3.7%, As 0.019%;

[0037] Anthracite: C 固 70.5%, V f 10.3%, A f 17.7%

[0038] The pyrite ore with a sulfur content of 36.5% is processed into granular materials with a particle size of 2 mm or less through a crusher, and 195 kg of pyrite granular materials are fed into a section of pyrolysis reduction flow at a speed of 80 kg per hour by the pyrite feeder 5 At the same time, 15 kg of anthracite coal powder with a particle size of 2 mm or less is fed by the coal feeder 4 at a rate of 6 kg per hour, and the pyrite is pyrolyzed and reduced at a temperature of 800-850 ° C to obtain a total sulfur content of 11.2%. 247 standard cubic meters of furnace gas;

[0039] The hot slag from the first-stage pyrolysis reduction fluidized bed 1 enters the second-stage rotary kiln roaster 2, and is roasted together w...

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Abstract

The invention discloses a method for producing sulfur and co-producing sponge iron by using a pyrolysis-reducing united technique, which comprises the following steps of: firstly carrying out first-step desulfurization-high temperature pyrolysis on sulfur-iron ores on a section of pyrolysis-reducing fluidized bed so as to generate sulfur steam and ferrous sulfide, wherein heat required by the pyrolysis process is mainly supplied by high-temperature flue gas from a pipe reactor and part of material combustion heat produced in the process; and 2, reducing iron oxide slag of a second-section furnace by using a coal-based rotary kiln direct reduction method, namely that on the basis of adopting a mature sponge iron production technology, fully using the high-order heat energy and high activity of the iron oxide slag discharged from the second-section furnace, therefore, effects of remarkably saving energy and reducing consumption as well as improving the production efficiency are achieved. The method is remarkable in energy saving effect, high in comprehensive utilization of mineral resources, environmental-friendly, and especially applicable to the large-scale development and utilization of sulfur-iron resources in sulfur resource-rich areas and the comprehensive utilization of high-sulfur fault coals; and meanwhile, the method also provides a new way for the comprehensive and efficient utilization of associated sulfur resources in the non-ferrous smelting industry.

Description

technical field [0001] The invention belongs to the technical field of chemical raw material preparation, and in particular relates to a method for producing sulfur and co-producing sponge iron by adopting pyrolysis-reduction combined technology. Background technique [0002] China's sulfur demand is huge, and its self-sufficiency is seriously insufficient, so it has been imported in large quantities for a long time. However, the research on sulfur production technology is seriously lagging behind, and the comprehensive utilization rate of a large number of sulfur resources such as coal-associated sulfur, non-ferrous ore-associated sulfur, and low-grade coal-based sulfur is extremely low, and it seriously pollutes the environment. [0003] At present, the main way to develop and utilize pyrite is to produce sulfur concentrate. The primary problem facing sulfur concentrate directly entering the market is high transportation costs and production costs, and overall weak market...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/06C01B17/04C21B13/00
CPCY02P10/20Y02P20/10Y02P20/129
Inventor 张跃王国良幸典成邓子萍
Owner 新疆中驰恒谊环保科技有限公司
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