某硫化锌精矿焙烧行为及相变试验研究

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-09-30 DOI:10.1016/j.powtec.2025.121714

X. Wen , J. Chen , M. Ng , L.A. Ushkov , E. Jak

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引用次数: 0

摘要

本研究考察了硫化锌精矿在600 ~ 950℃和不同焙烧时间下静态焙烧所产生的锌煅烧物中相的比例。利用电子探针x射线微分析（EPMA）与波长色散光谱（WDS）、自动矿物学分析（AMICS）与能量色散光谱（EDS）相结合的综合分析方法，建立了一个适用于硫化锌精矿和煅烧物表征的综合矿物学数据库。目前的研究解决了传统表征方法的局限性，提供了对煅烧结构的详细、定量的见解，重点关注了关键相的比例，如锌矿、尖晶石（铁酸锌）、威利矿（硅酸锌）和残余硅酸盐/硫化物。煅烧产物中锌含量与温度呈非线性关系，在750 ~ 850℃之间达到峰值；较低的焙烧温度导致铁酸锌相的形成，而较高的焙烧温度导致硅酸锌相的形成，这分别对浸出液和浸出液分离过程产生负面影响。这项工作通过详细说明影响铁酸锌和硅酸盐形成的因素，为优化锌加工条件提供了重要的理解。

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Experimental investigation of the roasting behaviour and phase transformations in a zinc sulfide concentrate

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Experimental investigation of the roasting behaviour and phase transformations in a zinc sulfide concentrate

The present study investigates the proportion of phases in zinc calcines produced by statically roasting zinc sulfide concentrate at temperatures between 600 and 950 °C and varying roasting times. Utilizing an integrated analytical approach combining Electron Probe X-ray Microanalysis (EPMA) with Wavelength Dispersive Spectroscopy (WDS) and Automated Mineralogy Analysis (AMA), AMICS, with Energy Dispersive Spectroscopy (EDS), a comprehensive mineralogical database suitable for the characterisation of zinc sulfide concentrate and calcines was developed. The present study addresses limitations of traditional characterisation methods by providing detailed, quantitative insights into the calcine structure, focusing on the proportion of key phases such as zincite, spinel (zinc ferrite), willemite (zinc silicates), and residual silicates/sulfides. The zincite content of the calcines displayed a non-linear relationship with temperature, peaking between 750 and 850 °C; lower roasting temperatures led to greater formation of the zinc ferrite phase, while higher temperatures led to greater formation of the zinc silicate phase, which have negative consequences for the leaching and leachate separation processes respectively. This work provides crucial understanding for optimizing zinc processing conditions by detailing the factors influencing zinc ferrite and silicate formation.

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.