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首页> 外文期刊>ISIJ international >Chlorination Behaviors of Zinc Phases by Calcium Chloride in High Temperature Oxidizing-chloridizing Roasting
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Chlorination Behaviors of Zinc Phases by Calcium Chloride in High Temperature Oxidizing-chloridizing Roasting

机译：氯化钙在高温氧化氯化焙烧中锌相的氯化行为

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摘要

The high temperature oxidizing-chloridizing roasting is one of useful methods to separate nonferrous metals from pyrite cinder and metallurgy slag. However, as one kind of main nonferrous metals in pyrite cinder and metallurgy slag, the occurrence of zinc is complicated and its chlorination behavior is not demonstrated. In the present study, chlorination behaviors of ZnO, ZnS and ZnFe_(2)O_(4) at the temperature range of 1025–1175°C in air by simulating the chloridizing roasting process of pyrite cinder and metallurgy slag have been investigated. It is shown that ZnS and ZnO is much easier to remove, ZnFe_(2)O_(4) is refractory to remove because of the presence of gangues. If enough chloride additives were added, the differences of Zn removal rate among ZnS, ZnO and ZnFe_(2)O_(4) would disappear. In addition, the presence of Al_(2)O_(3), SiO_(2), CaO and MgO decreases the Zn removal rate from ZnFe_(2)O_(4), and the presence of Al_(2)O_(3) and MgO decreases the Zn removal rate from ZnO while the presence of SiO_(2) and CaO improves the Zn removal rate from ZnO. Fe_(3)O_(4) influences the Zn removal rate from ZnO and ZnFe_(2)O_(4) positively.
机译：高温氧化氯化焙烧是从黄铁矿渣和冶金渣中分离有色金属的有用方法之一。但是，作为黄铁矿渣和冶金矿渣中的一种主要有色金属，锌的生成复杂，不能证明其氯化行为。在本研究中，通过模拟黄铁矿渣和冶金渣的氯化焙烧过程，研究了ZnO，ZnS和ZnFe_（2）O_（4）在1025–1175°C的温度下在空气中的氯化行为。结果表明，ZnS和ZnO更容易去除，而由于存在脉石，ZnFe_（2）O_（4）难以去除。如果添加足够的氯化物添加剂，则ZnS，ZnO和ZnFe_（2）O_（4）之间的Zn去除率差异将消失。另外，Al_（2）O_（3），SiO_（2），CaO和MgO的存在降低了ZnFe_（2）O_（4）的Zn去除率，Al_（2）O_（3）的存在MgO降低了ZnO的Zn去除率，而SiO_（2）和CaO的存在提高了ZnO的Zn去除率。 Fe_（3）O_（4）对ZnO和ZnFe_（2）O_（4）的Zn去除率有积极影响。

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