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首页> 外文期刊>International Journal of Chemistry >Analysis of Technological Issues, Related to Processing of Alunite at Ganja Alumina Plant (GAP), and Ways of Their Solving
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Analysis of Technological Issues, Related to Processing of Alunite at Ganja Alumina Plant (GAP), and Ways of Their Solving

机译：与Ganja氧化铝厂（GAP）中的褐铁矿生产相关的技术问题分析及解决方法

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In 1965, the Ganja Alumina plant (GAP) started implementing an alkaline reduction technology for processing of alunite ore on an industrial scale. Technological deficiencies, together with design errors, led to unprofitable production. Since the plant was established, studies have been conducted to eliminate deficiencies in the reduction process, through alkaline technology and hardware design. A reversed scheme was developed for hydrochemical processing of alunite restored with the conversion of sodium sulphates using a KOH solution. Despite the elimination of several shortcomings in alkaline reduction technology, certain drawbacks remained, in particular: 1) significant emission of gas and dust from the kilns of fluidized bed furnace during roasting and recovery; 2) insufficient time for recovery of alunite powder, which complicates and worsens the technological and economic aspects of the process; 3) passivation of alumina in the roasting and reduction processes; 4) low yield alumina yield in the commercial product (75%); and 5) a significant amount of solid waste: 5 tonnes of red sludge per 1 tonne of AL2O3, and errors. As a result, the alunite ore processing line ceased production in 1992 and has not operated since.This article is devoted to the development of new technologies and the improvement of a new potash-alkaline method and new soda-alkaline technology for processing alunite ores. The replacement of potash with soda (sodium carbonate), using new soda-alkaline technology, is proposed. Processing of solution from the first leach with sodium sulphate by conversion with KCl leads to production of K2SO4 and NaCl. Use of the soda-alkaline technology allowed us to obtain the same products as with potash-alkaline technology, with an additional product table salt. The fluidized bed furnace was replaced by a new type of kiln.
机译：1965年，Ganja氧化铝厂（GAP）开始实施碱还原技术，以工业规模加工亚矾石矿石。技术缺陷以及设计错误导致生产无利可图。自工厂成立以来，已经进行了研究，以通过碱性技术和硬件设计消除还原过程中的缺陷。提出了一种逆向方案，用于通过KOH溶液将硫酸钠转化为亚硫酸盐而进行的水化学处理。尽管消除了碱还原技术的一些缺点，但仍然存在某些缺点，特别是：1）在焙烧和回收过程中，流化床炉窑中大量排放气体和粉尘; 2）回收亚硫酸铝粉的时间不足，这使该工艺的技术和经济方面变得复杂且恶化; 3）在焙烧和还原过程中对氧化铝进行钝化; 4）商品中氧化铝的产率低（75％）; 5）大量的固体废物：每1吨AL2O3会有5吨红色污泥，并且存在误差。结果，铝矾石矿石生产线于1992年停产，此后一直没有运行。本文致力于新技术的开发以及对处理铝矾土矿石的新的钾碱方法和苏打碱技术的改进。建议使用新的苏打碱技术用苏打（碳​​酸钠）代替钾肥。通过用KCl进行转化，用硫酸钠对第一次浸出中的溶液进行处理，从而产生K2SO4和NaCl。苏打碱技术的使用使我们能够获得与钾碱技术相同的产品，以及额外的食盐。流化床炉被新型窑所取代。

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