Petrological Characteristics of Lateritic Bauxite Deposits of India and Their Significance in Mineral Processing

Journal of Geosciences Research Pub Date : 2024-07-01 DOI:10.56153/g19088-024-0197-59

Pravin Bhukte, G. Daware, Tejas Bhosale, Bhargavi Kulkarni, Anupam Agnihotri

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Abstract

India is endowed with 3896 million tons of bauxite resources and ranking it fifth globally. The bauxite comprises various minerals such as gibbsite, boehmite, diaspore, hematite, goethite, kaolinite, quartz, anatase and rutile. India possesses abundant lateritic bauxite resources originating from parent rocks like Khondalite, Deccan trap basalt, Granite Gneiss, Sandstone, etc., each exhibiting its specific characteristics. The geotechnological evaluation of India's lateritic bauxite deposits, conducted by Jawaharlal Nehru Aluminium Research Development and Design Centre (JNARDDC), revealed the presence of two types of deposits: high-level and low-level (coastal). In this study, bauxite and laterite samples were collected from different regions in India and subjected to comprehensive technological evaluation. Mineral processing techniques are optimized based on the mineralogical and petrological characteristics of the bauxite deposits. The mineral liberation, association, and alteration information obtained through petrological analysis guide the selection and optimization of various methods. The understanding of the mineralogy and petrological characteristics also assists in predicting the behaviour of bauxite during the processing stages, facilitating process control and minimizing losses. This paper aims to highlight the petrological, chemico-mineralogical characteristics of Indian lateritic bauxite deposits and emphasize the significance of petrology and mineralogy in their evaluation and mineral processing. Microscopic examination plays a vital role in mineral characterization and the beneficiation process by enabling mineral identification, texture analysis, grain size, mineral liberation, association, alteration, and process optimization. Such comprehensive analysis contributes to maximizing the economic value of mineral resources, aiding informed decision-making in exploration, mining, and mineral processing industries. Keywords: Bauxite, Lateritic Deposits, Petrological Characteristics, Mineralogy, Mineral Processing

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印度红土铝土矿的岩石学特征及其在矿物加工中的意义

印度拥有 38.96 亿吨铝土矿资源，在全球排名第五。铝土矿由多种矿物质组成，如辉钼矿、沸石、透辉石、赤铁矿、网纹石、高岭石、石英、锐钛矿和金红石。印度拥有丰富的红土铝土矿资源，其母岩包括孔雀石、德干岩陷玄武岩、花岗片麻岩、砂岩等，每种岩石都具有各自的特点。尼赫鲁铝业研究开发设计中心（JNARDDC）对印度红土铝土矿进行的地质技术评估显示，印度存在两种类型的矿床：高位矿床和低位矿床（沿海）。在这项研究中，从印度不同地区收集了铝土矿和红土样本，并对其进行了全面的技术评估。根据铝土矿藏的矿物学和岩石学特征，对矿物加工技术进行了优化。通过岩石学分析获得的矿物解放、关联和蚀变信息为各种方法的选择和优化提供了指导。对矿物学和岩石学特征的了解还有助于预测铝土矿在加工阶段的行为，促进工艺控制并最大限度地减少损失。本文旨在强调印度红土铝土矿的岩石学、化学矿物学特征，并强调岩石学和矿物学在其评估和矿物加工中的重要性。显微镜检查在矿物特征描述和选矿过程中起着至关重要的作用，可进行矿物鉴定、质地分析、粒度、矿物解放、关联、蚀变和工艺优化。这种综合分析有助于最大限度地提高矿产资源的经济价值，帮助勘探、采矿和矿物加工行业做出明智的决策。关键词铝土矿、红土矿床、岩石学特征、矿物学、矿物加工

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Journal of Geosciences Research

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