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Oxygen enrichment intensifying roasting method of nonferrous metal mineral resource

A technology for mineral resources and non-ferrous metals, applied in the field of oxygen-enriched intensified roasting of non-ferrous metal mineral resources, can solve the problems of low fuel utilization efficiency, limited reaction efficiency, and large negative impact on the environment, so as to improve and reduce combustion efficiency and combustion degree. Carbon black loading rate, the effect of reducing environmental pollution

Active Publication Date: 2018-04-06
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention utilizes the strong thermodynamic advantages of the oxygen-enriched environment to carry out oxygen-enriched intensified roasting of non-ferrous metal mineral resources in the oxygen-enriched atmosphere, greatly improving the fuel utilization efficiency and uniformly intensifying the temperature field, chemical potential and dynamic conditions of the roasting system , which solves the problems of low fuel utilization efficiency, limited reaction efficiency and large negative impact on the environment in the traditional roasting process

Method used

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  • Oxygen enrichment intensifying roasting method of nonferrous metal mineral resource

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Experimental program
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Effect test

Embodiment 1

[0018] Such as figure 1 As shown, the non-ferrous metal mineral resources oxygen-enriched intensified roasting method, its specific steps are as follows:

[0019] First, the non-ferrous metal mineral resources (zinc oxide concentrate, zinc content is 42wt%) and fuel (anthracite) are crushed to control the particle size of 40-200 mesh > 90%, and then according to the mass ratio of non-ferrous metal mineral resources and fuel to 3: 1 Mix evenly, put the mixed material into a 20×2.5m rotary kiln, first blow oxygen-enriched air into the kiln body through a spray gun (Oxygen-enriched O 2 concentration is 30vol%), ignited in an oxygen-enriched environment for oxygen-enriched intensified roasting, during the process of oxygen-enriched intensified roasting, the composition of the roasted gas phase is monitored, and the oxygen-enriched concentration is adjusted in real time. The COvol% in the gas is 85%, and the O in the oxygen-enriched is controlled 2 vol% is 70%, and the oxygen-enr...

Embodiment 2

[0021] Such as figure 1 As shown, the non-ferrous metal mineral resources oxygen-enriched intensified roasting method, its specific steps are as follows:

[0022] First, the non-ferrous metal mineral resources (tin concentrate, tin content of 28wt%) and fuel (anthracite) are crushed to control the particle size of 40-200 mesh > 85%, and then according to the mass ratio of non-ferrous metal mineral resources and fuel to 3.2:1 Mix evenly, put the mixed material into a 20×2.5m rotary kiln, first blow oxygen-enriched air into the kiln body through a spray gun (Oxygen-enriched O 2 concentration is 25vol%), ignite in an oxygen-enriched environment for oxygen-enriched enhanced roasting, monitor the composition of the roasted gas phase during the oxygen-enriched enhanced roasting process, and adjust the oxygen-enriched concentration in real time. The COvol% in the gas is 80%, and the O in the oxygen-enriched is controlled 2 vol% is 50%, and the oxygen-enriched air flow rate is contr...

Embodiment 3

[0024] Such as figure 1 As shown, the non-ferrous metal mineral resources oxygen-enriched intensified roasting method, its specific steps are as follows:

[0025] First, the non-ferrous metal mineral resources (zinc oxide concentrate, zinc content is 45wt%) and fuel (anthracite) are crushed to control the particle size of 40-200 mesh > 80%, and then according to the mass ratio of non-ferrous metal mineral resources and fuel to 2.8: 1 Mix evenly, put the mixed material into the fluidized bed, first blow oxygen-enriched air into the kiln body through the spray gun (Oxygen-enriched O 2 concentration is 30vol%), ignited in an oxygen-enriched environment for oxygen-enriched intensified roasting, during the process of oxygen-enriched intensified roasting, the composition of the roasted gas phase is monitored, and the oxygen-enriched concentration is adjusted in real time. The COvol% in the gas is 88%, and the O in the oxygen-enriched is controlled 2 vol% is 90%, and the oxygen-enr...

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Abstract

The invention relates to an oxygen enrichment intensifying roasting method of a nonferrous metal mineral resource, and belongs to the technical field of energy conservation and emission reduction andintensifying. The oxygen enrichment intensifying roasting method comprises the steps that firstly, the nonferrous metal mineral resource and fuel are mixed to be even after being smashed, oxygen enrichment intensifying roasting is conducted by igniting in an oxygen enrichment environment, roasting gas phase composition is monitored in the oxygen enrichment intensifying roasting process, and timelyadjustment is conducted on the oxygen enrichment concentration; when Co vol% in a high temperature flue gas phase is larger than 80%, the oxygen enrichment concentration is controlled to be larger than 50% and less than 100%; and when CO vol% in the high temperature flue gas phase is larger than 40% and less than or equal to 80%, the oxygen enrichment concentration is controlled to be larger than21% and less than or equal to 50%, and high temperature flue gas generated in the roasting process is exhausted into the air after being subjected to dust collecting, waste heat utilization and desulfuration treatment. The oxygen enrichment intensifying roasting method utilizes a strong thermodynamic advantage of the oxygen enrichment environment, oxygen enrichment intensifying roasting is conducted on the nonferrous metal mineral resource in an oxygen enrichment atmosphere, the fuel utilization rate is sharply improved while the temperature field, the chemical potential and the dynamics conditions of a roasting system are evened and enhanced, and the problems that the fuel utilization rate is low, the reaction efficiency is limited and the environmental negative influence is large existing in a traditional roasting technology are solved.

Description

technical field [0001] The invention relates to an oxygen-enriched intensified roasting method for non-ferrous metal mineral resources, which belongs to the technical field of energy saving, emission reduction and intensification. Background technique [0002] Roasting refers to the reaction process of solid materials under the condition of high temperature without melting, generally including oxidation, pyrolysis, reduction, halogenation, etc., usually used in the metallurgical industry for mineral phase reformation, directional sintering and volatile elements of metal ores Volatile collection, etc. There are two types of roasting process with additives and without additives. The roasting process with additives can be subdivided into sulfated roasting, reduction roasting, oxidation roasting, chlorination roasting, etc. according to the technical purpose. The equipment used in the roasting process can be divided into fixed bed, moving bed and fluidized bed according to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02
CPCC22B1/02
Inventor 王华李磊魏永刚胡建杭
Owner KUNMING UNIV OF SCI & TECH
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