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摘要:
红柱石是一种天然无水铝硅酸盐矿物,具有良好的耐高温性能,是制备高级耐火材料和铝硅合金的重要原料,在建材、陶瓷、航空等行业具有广泛应用。中国红柱石资源分布广、储量大,但大部分天然红柱石原矿品位低、嵌布粒度不均匀,需经选别富集后方可利用。红柱石选矿流程,根据其原矿嵌布粒度,可划分为粗粒级选矿与细粒级选矿。粗粒级红柱石选矿,主要采用选择碎磨-筛分或重介质选矿工艺;细粒级红柱石选矿,则主要采用酸性浮选-强磁选工艺。本文介绍了红柱石矿物的晶体结构与理化性质,详细分析总结了中国红柱石矿产资源分布与选别工艺研究现状,并对其未来发展方向进行了合理展望。
Abstract:Andalusite is a natural anhydrous aluminosilicate mineral with high temperature resistance. As an important raw material for preparing high-grade refractory materials and aluminum-silicon alloys, it is widely utilized in building materials, ceramics, aviation and other industries. The andalusite resources in China are widely distributed and abundant, but most of the raw andalusite are within low grade and fine grain distribution, needing obligatory beneficiation. The beneficiation process of andalusite can be divided into coarse-grained beneficiation and fine-grained beneficiation according to its raw distribution size. The processing of coarse-grained andalusite mainly adopts selective grinding-screening or heavy medium beneficiation technology. Fine-grained andalusite is mainly beneficiated through acid flotation as well as high intensity magnetic separation. In this paper, the crystal structure as well as the physical and chemical properties of andalusite were introduced, the present situation of mineral resource distribution and beneficiation technology of andalusite in China were analyzed in detail. The reasonable prospects of the future development of andalusite were also provided.
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Key words:
- andalusite /
- resources survey /
- refractories /
- beneficiation technology
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表 1 中国主要的红柱石矿区及其矿源主要伴生矿物及其特点
Table 1. China's major rhodochrosite mining areas and their sources of the main associated minerals and their characteristics
表 2 红柱石精矿耐火性能测定结果
Table 2. Determination results of the refractory property of rhodochrosite concentrate
温度/℃ 50 100 150 200 250 300 400 500 600 700 800 900 1 000 1 100 1 200 1 300 线膨胀系数 +0.02 -0.06 -0.03 +0.01 +0.05 -0.03 -0.04 +0.1 +0.19 +0.27 +0.36 +0.44 +0.53 +0.63 +0.73 +0.83 耐火度/℃ >1 790 表 3 常用红柱石酸性浮选捕收剂种类及优缺点
Table 3. Types of commonly used erythrite acidic flotation traps and their advantages and disadvantages
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