含金石煤钒矿综合利用技术研究

发布时间：2018-06-16 02:42

本文选题：含金石煤钒矿 + 浸出　；参考：《东北大学》2015年硕士论文

【摘要】：钒的应用十分广泛,在钢铁、有色金属、化工等工业领域都是不可或缺的重要元素。我国现已探明石煤钒矿中钒的总储量(以V205计)已超过1×108t,并常伴生有其他金属元素,实现这一矿产资源的综合利用具有非常重要的战略意义。本文针对某地含金石煤钒矿进行了综合利用技术研究,旨在制定合适的提钒工艺,同时综合回收金等有价元素。该石煤钒矿中主要回收的元素为钒、金,其他元素含量较低。钒主要以黏土矿物和钒云母的形式存在,金、银主要赋存在黄铁矿中。根据石煤钒矿矿物特点,首先进行了多种浸出工艺探索试验,在此基础上确定选用直接酸浸工艺；并通过正交试验、条件试验及优化试验,确定了酸浸工艺的适宜操作参数,获得了86.81%的V205浸出率；在酸浸过程中,金全部进入浸出渣；钒浸出液经处理后采用P204+TBP+溶剂油体系萃取,并经硫酸溶液反萃,得到的钒富集液经氧化沉钒和煅烧,得到V205产品。为了回收原矿中的金,对酸浸渣进行了氰化法及非氰法浸金试验,采用氰化法获得了84.26%的金浸出率；对中和过程获得的中和产物采用重结晶处理法,得到合格硫酸铝铵产品。通过以上探索及条件试验确定采用破碎-逆流酸浸.中和及还原-萃取及反萃取.氧化沉钒-煅烧-V205产品的原矿处理工艺,并对酸浸渣进行氰化浸金、中和产物通过重结晶制备硫酸铝铵。流程中钒的总回收率为84.00%,得到的V205产品质量达到YB/T5304-2011牌号V20599级标准；金的浸出率为84.26%；每吨原矿可制得料得150kg符合GB25592-2010质量标准的硫酸铝铵。对因多次萃取而逐渐失去原有功能的萃取剂进行再生和转型处理试验,处理后的萃取剂与新鲜萃取剂比较,萃取指标基本一致。对含钒浸出液经过萃取后得到的萃余液进行废水处理,处理后水清亮透明,其中的Cd、As、Cr、Pb含量低于国家GB26452-2011排放标准,大部分可返回流程使用。
[Abstract]:Vanadium is widely used in iron and steel, non-ferrous metals, chemical industry and other fields are indispensable and important elements. The total vanadium reserves (in V205) in the vanadium deposit of stone coal in China have been proved to be more than 1 脳 108 t, and other metal elements are often associated with them. It is of great strategic significance to realize the comprehensive utilization of this mineral resource. In this paper, the comprehensive utilization technology of gold-bearing coal vanadium ore is studied in order to establish a suitable vanadium extraction process and to comprehensively recover valuable elements such as gold. The main recovered elements are vanadium, gold and other elements. Vanadium mainly exists in the form of clay and vanadium mica, and gold and silver mainly occur in pyrite. According to the characteristics of vanadium ores from stone coals, several kinds of leaching experiments were carried out, on which the direct acid leaching process was selected, and the suitable operation parameters of acid leaching process were determined by orthogonal test, conditional test and optimization test. The leaching rate of V205 was 86.81%. During acid leaching, all gold entered the leaching slag, and the vanadium leaching solution was extracted by P204 TBP solvent oil system after treatment, and the vanadium enriched solution was oxidized and calcined to obtain V205 product. In order to recover gold from raw ore, cyanidation and non-cyanide leaching tests of acid leaching slag were carried out. The gold leaching rate of 84.26% was obtained by cyanidation method, and the neutralization products obtained from neutralization process were treated by recrystallization to obtain qualified ammonium aluminum sulfate products. Through the above exploration and condition test, it is determined that crushing-countercurrent acid leaching is adopted. Neutralization and reduction-extraction and stripping. The raw ore treatment process of oxidized vanadium-calcined-V205 product was carried out, and gold was leached by cyanidation of acid leaching slag, and ammonium aluminum sulfate was prepared by recrystallization of neutralization product. The total recovery of vanadium in the process is 84.00, and the quality of the product V205 is up to YB / T5304-2011 grade V20599 standard; the leaching rate of gold is 84.26; and the ammonium aluminum sulfate (150kg) conforming to GB25592-2010 quality standard can be obtained per ton of raw ore. The experiment of regeneration and transformation treatment was carried out on the extractant which gradually lost its original function because of many times of extraction. Compared with the fresh extractant, the extraction index of the treated extractant was basically the same as that of the fresh extractant. The waste water obtained from the extraction of vanadium containing leachate was treated. The water was clear and transparent. The content of CD _ (2 +) AsC _ (Cr) Pb was lower than the national discharge standard (GB26452-2011), and most of it could be used in the process.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD983

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