微細(xì)粒氧化錳礦綜合利用研究
發(fā)布時間：2019-06-12 18:36
【摘要】：錳是我國國民經(jīng)濟(jì)的重要礦產(chǎn)資源,我國錳礦資源中氧化錳礦石占34.50%,含錳平均品位24.56%,氧化錳礦石中大多含有大量的原生礦泥,表層為氧化礦,通常含泥量比較大,這使得選礦過程中錳的損失比較嚴(yán)重。國內(nèi)選礦廠堆積了大量的錳礦泥,資源浪費比較嚴(yán)重。本文主要采用濕法浸出技術(shù)對微細(xì)粒氧化錳礦進(jìn)行綜合利用研究。作為錳行業(yè)中最基本的產(chǎn)品,目前國內(nèi)硫酸錳和碳酸錳的生產(chǎn)大多是采用菱錳礦和軟錳礦為原料,用氧化錳礦的浸出液作原料來制取。本試驗以廣西大新錳礦為研究對象,考察了氧化錳礦還原浸出的最佳工藝條件,對浸出的機(jī)理也進(jìn)行了討論,并對浸出液開展了一系列的凈化試驗,研究具有一定創(chuàng)新性。主要以微細(xì)粒氧化錳礦為研究對象,硫酸溶液為介質(zhì),SO2為還原劑還原浸出微細(xì)粒氧化錳礦中的錳。通過考察硫酸用量、浸出時間、液固比、反應(yīng)溫度、攪拌強(qiáng)度、循環(huán)浸出次數(shù)等反應(yīng)條件,得到最佳浸出工藝條件為:硫酸溶液濃度0.46 mol/L、浸出時間40 min、液固比4:1、攪拌速率300 r/min、循環(huán)浸出次數(shù)5次以內(nèi)、通入SO2流量0.2 L/min,在室溫下反應(yīng)最終氧化錳礦中錳的還原浸出率達(dá)到95%以上。本文還采用濃度為30%的H2O2溶液為氧化劑,氧化浸出液中的Fe2+,用氨水調(diào)節(jié)浸出液的p H值沉淀除鐵,除鐵率效率到了100%。浸出液進(jìn)一步用來制取碳酸錳和硫酸錳,其方法為首先對浸出液進(jìn)行蒸發(fā)濃縮,當(dāng)硫酸錳溶液濃度接近飽和點停止蒸發(fā),接著采用沉淀法制取碳酸錳。以碳酸氫銨做沉淀劑,通過中和沉淀法制備碳酸錳,沉錳率達(dá)到99.8%。得到的碳酸錳可與硫酸溶液反應(yīng),通過蒸濃法制備硫酸錳產(chǎn)品,沉碳酸錳母液可以蒸發(fā)結(jié)晶回收硫酸銨產(chǎn)品。最終制得的試驗產(chǎn)品均可達(dá)到化工行業(yè)標(biāo)準(zhǔn)一級品的質(zhì)量要求。
[Abstract]:Manganese is an important mineral resource in our national economy. The manganese oxide ore in China's manganese ore resource accounts for 34.50%, the average grade of manganese content is 24.56%, and the manganese oxide ore contains a large amount of primary slime, and the surface layer is an oxidized ore. This makes the loss of manganese in the ore dressing process more serious. In the domestic dressing plant, a large amount of manganese ore mud is accumulated, and the resource waste is more serious. In this paper, the comprehensive utilization of micro-fine-grained oxidized manganese ore is studied by wet-process leaching technology. As the most basic product in the manganese industry, the present production of manganese sulfate and manganese carbonate is mainly used as the raw material by using the pyrolusite and the pyrolusite, and the leaching solution of the manganese oxide is used as the raw material. The optimum technological conditions for the reduction and leaching of oxidized manganese ore were studied in this experiment. The mechanism of the leaching was also discussed, and a series of purification tests were carried out on the leachate. The manganese in the micro-fine-grained oxidized manganese ore is mainly used as the research object of the micro-fine-grained oxidized manganese ore, and the sulfuric acid solution is the medium and the SO2 is the reducing agent for reducing the manganese in the fine-grained oxidized manganese ore. The optimum leaching conditions are as follows: the concentration of sulfuric acid solution is 0.46 mol/ L, the leaching time is 40 min, the liquid-solid ratio is 4:1, and the stirring rate is 300r/ min. And the reduction and leaching rate of the manganese in the final oxidized manganese ore is more than 95 percent under the room temperature. In this paper, an H2O2 solution with a concentration of 30% is used as the oxidizing agent, and the Fe2 + in the leaching solution is oxidized, the pH value of the leachate is adjusted by the ammonia water, the iron removal is carried out, and the iron removal efficiency is improved to 100%. The leaching solution is further used for preparing manganese carbonate and manganese sulfate, and the method comprises the following steps of: carrying out evaporation concentration on the leaching solution, stopping the evaporation when the concentration of the manganese sulfate solution approaches the saturation point, and then adopting a precipitation method to prepare the manganese carbonate. And the manganese carbonate is prepared by using the potassium bicarbonate as a precipitating agent, and the manganese carbonate is prepared by the neutralization precipitation method, and the manganese content rate reaches 99.8 percent. The obtained manganese carbonate can be reacted with a sulfuric acid solution, and a manganese sulfate product is prepared by a steam concentration method, and the precipitated manganese carbonate mother liquor can be evaporated and crystallized to recover the sulfuric acid product. The final product can meet the quality requirement of the standard one-grade product in the chemical industry.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD981
本文編號：2498218
[Abstract]:Manganese is an important mineral resource in our national economy. The manganese oxide ore in China's manganese ore resource accounts for 34.50%, the average grade of manganese content is 24.56%, and the manganese oxide ore contains a large amount of primary slime, and the surface layer is an oxidized ore. This makes the loss of manganese in the ore dressing process more serious. In the domestic dressing plant, a large amount of manganese ore mud is accumulated, and the resource waste is more serious. In this paper, the comprehensive utilization of micro-fine-grained oxidized manganese ore is studied by wet-process leaching technology. As the most basic product in the manganese industry, the present production of manganese sulfate and manganese carbonate is mainly used as the raw material by using the pyrolusite and the pyrolusite, and the leaching solution of the manganese oxide is used as the raw material. The optimum technological conditions for the reduction and leaching of oxidized manganese ore were studied in this experiment. The mechanism of the leaching was also discussed, and a series of purification tests were carried out on the leachate. The manganese in the micro-fine-grained oxidized manganese ore is mainly used as the research object of the micro-fine-grained oxidized manganese ore, and the sulfuric acid solution is the medium and the SO2 is the reducing agent for reducing the manganese in the fine-grained oxidized manganese ore. The optimum leaching conditions are as follows: the concentration of sulfuric acid solution is 0.46 mol/ L, the leaching time is 40 min, the liquid-solid ratio is 4:1, and the stirring rate is 300r/ min. And the reduction and leaching rate of the manganese in the final oxidized manganese ore is more than 95 percent under the room temperature. In this paper, an H2O2 solution with a concentration of 30% is used as the oxidizing agent, and the Fe2 + in the leaching solution is oxidized, the pH value of the leachate is adjusted by the ammonia water, the iron removal is carried out, and the iron removal efficiency is improved to 100%. The leaching solution is further used for preparing manganese carbonate and manganese sulfate, and the method comprises the following steps of: carrying out evaporation concentration on the leaching solution, stopping the evaporation when the concentration of the manganese sulfate solution approaches the saturation point, and then adopting a precipitation method to prepare the manganese carbonate. And the manganese carbonate is prepared by using the potassium bicarbonate as a precipitating agent, and the manganese carbonate is prepared by the neutralization precipitation method, and the manganese content rate reaches 99.8 percent. The obtained manganese carbonate can be reacted with a sulfuric acid solution, and a manganese sulfate product is prepared by a steam concentration method, and the precipitated manganese carbonate mother liquor can be evaporated and crystallized to recover the sulfuric acid product. The final product can meet the quality requirement of the standard one-grade product in the chemical industry.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD981
【參考文獻(xiàn)】
相關(guān)期刊論文 前3條
1 劉啟達(dá);高效實用的軟錳礦漿脫硫新技術(shù)和工藝流程[J];廣東化工;1998年02期
2 歐陽昌倫;謝蘭香;;錳礦濕法脫硫過程中影響連二硫酸鹽生成的主要因素[J];廣西化工;1983年03期
3 周登鳳;李軍旗;楊志彬;唐道文;;硫酸錳深度凈化的研究[J];貴州工業(yè)大學(xué)學(xué)報(自然科學(xué)版);2006年01期
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