STUDI PERILAKU PELINDIAN TIMBAL DARI BIJIH GALENA NANGGUNG KABUPATEN BOGOR DALAM LARUTAN ASAM ASETAT DAN OKSIDATOR HIDROGEN PEROKSIDA

IF 0.6 Q4 METALLURGY & METALLURGICAL ENGINEERING

Metalurgija Pub Date : 2018-01-23 DOI:10.14203/METALURGI.V29I1.271

Zaki Mubarok, Yahya Yahya

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引用次数: 0

Abstract

STUDY ON THE LEACHING BEHAVIOUR OF LEAD FROM GALENA ORE OF NANGGUNG BOGOR DISTRICT AREA IN ACETIC ACID SOLUTION USING HYDROGEN PEROXIDE AS OXIDIZING AGENT. In the present paper, the results of lead leaching from galena ore received from Nanggung Bogor Regency in acetic acid solution with the presence of hydrogen peroxide as oxidizing agent are presented. Series of bath agitation leaching tests at atmospheric pressure have been carried out to investigate the influences of acetic acid and hydrogen peroxide concentrations, leaching temperature and stirring speed on the extraction percentage of lead. Leaching kinetics was studied at temperatures of 30, 40 and 50 °C by using shrinking core model to determine rate constant, rate determining step and activation energy for lead leaching. The investigation results have demonstrated that lead extraction from galena ore can be well performed by direct leaching of the ore in acetic acid solution in the presence of hydrogen peroxide as oxidizing agent at atmospheric pressure. The highest lead extraction level of 92.3% was obtained from the leaching test with acetic acid and hydrogen peroxide concentrations of 3 and 0.5 molar, respectively, leaching temperature of 50 °C, stirring speed 200 rpm, ore particle size distribution -200 mesh after 90 minute. The hydrogen peroxide concentration must be maintained at certain level in order to avoid the precipitation of lead sulfate that resulted in the decrease of lead extraction percentage. The result of kinetics study revealed that the leaching rate of lead from West Java galena ore in acetit acid and H2O2 solution is controlled by interface reaction with activation energy of 54.52 kJ/mole.

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我一直在研究一个浮场，以便在六年的醋酸盐和氢氧化物氧化中建造一个浮桩。

南宫茂物区方铅矿中铅在醋酸溶液中以过氧化氢为氧化剂的浸出行为研究本文介绍了以过氧化氢为氧化剂，在醋酸溶液中浸出南宫茂物矿方铅矿中的铅的试验结果。通过常压浴槽搅拌浸出试验，研究了乙酸浓度、过氧化氢浓度、浸出温度和搅拌速度对铅浸出率的影响。采用缩芯模型研究了铅在30、40和50℃下的浸出动力学，确定了浸出的速率常数、速率决定步长和活化能。研究结果表明，在常压下，以过氧化氢为氧化剂，在乙酸溶液中直接浸出方铅矿中的铅，可获得较好的提铅效果。在乙酸浓度为3 mol / l、过氧化氢浓度为0.5 mol / l、浸出温度为50℃、搅拌速度为200 rpm、浸出90 min后矿石粒度分布为-200目的条件下，浸出铅的最高提取率为92.3%。过氧化氢浓度必须保持在一定的水平，以避免硫酸铅的沉淀，导致铅的提取率下降。动力学研究结果表明，西爪哇方铅矿铅在醋酸- H2O2溶液中的浸出速率受界面反应控制，活化能为54.52 kJ/mol。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Metalurgija 工程技术-冶金工程

CiteScore

1.20

自引率

33.30%

发文量

审稿时长

4-8 weeks

期刊介绍： The journal Metalurgija is primary scientific periodical that publishes scientific papers (original papers, preliminary notes, reviewed papers) as well as professional papers from the area of basic, applicable and developing researching in metallurgy and boundary metallurgy areas (physics, chemistry, mechanical engineering). These papers relate to processing ferrous and non-ferrous metallurgy, treating investigating as well as testing of raw materials, semi products and products, especially in the area of improving new materials and possibilities of their implementation. The journal is the only national periodical of this kind in the Republic of Croatia and covers the scientific field of metallurgy, especially: physical metallurgy and materials; process metailurgy, (ferrous and non-ferrous); mechanical metallurgy (processing, power , etc.); related (adjoing) branches: mechanlcal engineering, chemistry, physics etc.