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The copper flash blowing process simulation research

Author: HuangJinDi
Tutor: TongChangRen
School: Jiangxi University of Technology
Course: Non-ferrous metallurgy
Keywords: Flash converting CFD Fluent numerical simulation computer simulation
CLC: TF811
Type: Master's thesis
Year: 2011
Downloads: 54
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Abstract


Copper Flash Smelting - Flash converting technology companies and the United States Kennecott-Outokumpu companies to develop copper technology （hereinafter referred to as "dual flash" process.） In 1995, the "dual flash" process in the United States Utah smelter was put into industrial production. Production practice shows that the "dual flash" flash smelting technology and the traditional converting of converter technology-PS compared with the clean, efficient, small investment, production cost is low. While domestic enterprises are the recent selection of new copper "dual flash" process, so the converting process simulation of flash to simulate the converting process for the study of flash has some practical significance.With the development of technology, computer simulation technology gradually introduced to the metallurgical process simulation, it is considered to be of metallurgical process means the first 3. Introduction of metallurgy CFD technology has played a test for the traditional industries to save costs and reduce the role of testing time. Therefore, the use of CFD technology to the process of flash converting a better solution to the traditional research can not be flash furnace converting the issue within the regional monitoring, for the converting process of Flash offers an effective means of technology through the CFD We can study the impact of copper flash smelting process of converting the various constraints.This study is the use of UDF in Fluent combustion modeling flash function to add converting simulation model with different particle diameter, different processes components, different central oxygen, with or without burning air and so the simulation. Under these conditions, the study converting through the flash furnace Ge field and particle simulation, gives the particle temperature, oxidation, particle velocity, the survival time and the distribution of sedimentation tanks. This study details the ways and means of simulation, this converting process simulation for the flash to provide a better solution. Mainly for the research and findings are the following:（1） particle behavior and the degree of oxidation of particles in the same conditions for a variety of simulated conditions found in separate particles, 150um 20um particles than particles slow rise in temperature, oxidation low, but the particles 150um offset by the distribution of wind over the extent of reaction tower center 20um high. Also found that, in the absence of particle breakage and collision simulation is greater than 70um some cases about 20-30% of the Cu2S particles remain unreacted. （2） The amount of wind converting on the flash process of research. The distribution in different wind conditions, the reaction tower is not the same high-temperature region, the distribution air volume 1059Nm3 / h air volume than 765Nm3 / h of heat a larger area, and the central region of the Cu2S higher degree of oxidation. At the same time by 1294Nm3 / h and 1059Nm3 / h compared the distribution of the wind can be seen, the distribution of high winds led to over-shift reaction tower center of particles, resulting in high concentrations of O2 below the central nozzle. Cu2O particle beam generated more central region, while the particle beam outside the region due to lack of oxygen, resulting in incomplete oxidation. Therefore, under simulated conditions in the study, the proposed distribution of air control in the 1059Nm3 / h near.（3） Comparison of different oxygen found in the central, central oxygen as 166Nm3 / h over 498Nm3 / h the temperature of the hot zone conditions smaller particles, and less prone to the central oxygen particle beam central region there are not more likely to respond the Cu2S. Whether the combustion air from the comparison between the simulation, the wind in the absence of combustion conditions, the particles slow reaction, oxidation is less than a burning wind of the situation.

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CLC: > Industrial Technology > Metallurgical Industry > Nonferrous metal smelting > Heavy metals smelting > Copper
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