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钽铌厂矿石分解工序含氟废水处理试验 被引量:4
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作者 李水芳 陈学泽 +1 位作者 王元兰 谭晓燕 《中南林学院学报》 CSCD 2003年第2期98-100,共3页
 以CaCl2为沉淀剂,加入适量FeCl3作絮凝剂,对钽铌厂矿石分解工序含氟量为1596mg/L的碱性废水进行除氟试验.研究了Ca2+/F-摩尔比、絮凝剂种类、絮凝剂用量、废水pH值、混凝搅拌时间等因素对水中残氟量的影响.结果表明:按Ca2+/F-摩尔比为...  以CaCl2为沉淀剂,加入适量FeCl3作絮凝剂,对钽铌厂矿石分解工序含氟量为1596mg/L的碱性废水进行除氟试验.研究了Ca2+/F-摩尔比、絮凝剂种类、絮凝剂用量、废水pH值、混凝搅拌时间等因素对水中残氟量的影响.结果表明:按Ca2+/F-摩尔比为3加入CaCl2,按30mg/L加入FeCl3,混凝搅拌5min,静置1h后,废水含氟量可降至8.1mg/L,达到国家污水综合排放标准中的一级标准. 展开更多
关键词 钽铌厂废水 矿石分解工序 含氟废水 废水处理 沉淀剂 絮凝剂 残氟量
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机械活化在俄罗斯钨精矿分解中的应用 被引量:1
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作者 赵秦生 《稀有金属与硬质合金》 CAS CSCD 2005年第2期31-34,共4页
阐述了机械活化的基本原理及其在某些矿石分解过程中具有的重要意义,指出机械活化既可加速分解过程,又能提高浸出率,同时达到节能降耗的双重目的。介绍了俄罗斯在钨精矿分解中对机械活化的研究和应用情况。
关键词 机械活化 钨精矿 矿石分解 苏打高压浸出
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石煤提钒工艺现状及发展趋势 被引量:37
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作者 王学文 王明玉 《钢铁钒钛》 CAS 北大核心 2012年第1期8-14,共7页
介绍了石煤资源的分布情况及工艺现状,分析了各种提钒工艺的优缺点。根据石煤提钒的发展历程及其研究现状,指出石煤提钒工艺的发展趋势呈现出以下特点:①石煤提钒矿石分解优选酸分解工艺;②石煤酸浸液中分离富集钒工艺多元化;③石煤提... 介绍了石煤资源的分布情况及工艺现状,分析了各种提钒工艺的优缺点。根据石煤提钒的发展历程及其研究现状,指出石煤提钒工艺的发展趋势呈现出以下特点:①石煤提钒矿石分解优选酸分解工艺;②石煤酸浸液中分离富集钒工艺多元化;③石煤提钒产品多样化;④石煤提钒工艺过程多元素综合回收集约化。 展开更多
关键词 石煤 提钒 矿石分解 浸出 富集 综合利用
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解决黑钨精矿中钙含量高的问题之浅见
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作者 易金萍 李世乐 李雪 《中国钨业》 CAS 1995年第6期15-18,共4页
一、前言目前在我国市售的黑钨精矿中,优质低钙的黑钨精矿越来越少,更多的是高钙黑钨精矿。而我国大多数钨冶炼厂的矿石分解仍采用传统的搅拌碱浸工艺(常压碱煮和加压碱煮,后统称碱压煮)。
关键词 高钙黑钨精矿 分解 钙含量 冶炼厂 工艺路线 白钨精矿 矿石分解 钨冶炼 压煮 碱浸渣
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中国台湾稀土资源、生产和材料应用现状
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作者 刘余九 《中国稀土学报》 CAS CSCD 北大核心 1994年第4期352-357,共6页
本文叙述了台湾稀土资源及其分布、开发利用现状,综合介绍了稀土生产及稀土材料应用状况,同时也评述了稀土市场及其前景。
关键词 稀土资源 独居石 矿石分解 分离 台湾
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A novel green depressant for flotation separation of scheelite from calcite 被引量:10
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作者 Chen CHEN Wei SUN +1 位作者 Hai-ling ZHU Run-qin LIU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2021年第8期2493-2500,共8页
Polyaspartic acid(PASP)was used as a novel environmental-friendly depressant,and its inhibition effect on flotation performance of scheelite and calcite using sodium oleate(NaOL)as a collector was investigated by ways... Polyaspartic acid(PASP)was used as a novel environmental-friendly depressant,and its inhibition effect on flotation performance of scheelite and calcite using sodium oleate(NaOL)as a collector was investigated by ways of flotation experiments,zeta potential measurement,contact angle measurement and infrared spectroscopic analysis(IR).The results show that PASP exhibits stronger inhibition capability and selectivity than acidified water glass,and the flotation separation of scheelite from calcite can be realized in the presence of 6 mg/L PASP and 20 mg/L NaOL at pH>6.In the presence of PASP,the zeta potential of calcite surface almost keeps unchanged after adding NaOL,and the contact angle decreases sharply.Therefore,it is indicated that PASP significantly decreases the adsorption of NaOL on calcite surface.By contrast,it has no distinct effect on the adsorption of NaOL on the scheelite surface,which is further confirmed by IR results. 展开更多
关键词 polyaspartic acid SCHEELITE CALCITE flotation separation INHIBITION
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Acid leaching decarbonization and following pressure oxidation of carbonic refractory gold ore 被引量:2
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作者 张杜超 肖庆凯 +3 位作者 刘伟锋 陈霖 杨天足 刘又年 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第7期1584-1590,共7页
Carbonate decomposition of carbonic refractory gold ore and the following pressure oxidation were studied.In the carbonate decomposition procedure,the effects of liquid-to-solid ratio and reaction time on decompositio... Carbonate decomposition of carbonic refractory gold ore and the following pressure oxidation were studied.In the carbonate decomposition procedure,the effects of liquid-to-solid ratio and reaction time on decomposition ratio of carbonate were investigated.The experimental result shows that the decomposition ratio of carbonate is 98.24%under the conditions of liquid-to-solid ratio of 5:1,Fe^(3+)concentration of 20 g/L,sulfuric acid concentration of 20 g/L,reaction temperature of 80 ℃ and reaction time of 2 h.Then,the slurry obtained from carbonate decomposition was put into the titanium autoclave for pressure oxidation leaching.Effects of liquid-to-solid ratio,temperature,time and oxygen partial pressure on sulfur oxidation ratio were studied during pressure oxidation.With the prolonged time,pyrite and arsenopyrite are oxidized to ferric subsulfate,hydrated ferric sulfate and jarosite,resulting in the increasing residue ratio.The residue ratio and the sulfur content in the residue can be decreased by ferric subsulfate dissolution.The oxidation ratio of the sulfur is 99.35% under the conditions of oxidation time of 4 h,temperature of 210 ℃,oxygen partial pressure of 0.8 MPa and stirring speed of 600 r/min. 展开更多
关键词 carbonic refractory gold ore carbonate decomposition pressure oxidation ferric subsulfate dissolution
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Microbial Solubilization of Phosphorus from Nano Rock Phosphate
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作者 Tapan Adhikari Samaresh Kundu Anangi Subba Rao 《Journal of Agricultural Science and Technology(A)》 2014年第6期468-474,共7页
Phosphorus (P) is a major growth-limiting nutrient, and unlike the case of nitrogen (N), there is no large atmospheric source that can be made biologically available. Moreover, P governs crucial role in plant as i... Phosphorus (P) is a major growth-limiting nutrient, and unlike the case of nitrogen (N), there is no large atmospheric source that can be made biologically available. Moreover, P governs crucial role in plant as it stimulates root development and growth, gives plant rapid and vigorous start leading to better tillering and essential for many metabolic processes for seed formation. Soil microbes play very important role in bio-weathering and biodegradation. The microorganisms produce low molecular mass organic acids, which attack the phosphate structure and transform phosphorus from non-utilizable to the utilizable for the plants form. The test of the relative efficiency of isolated strains is carried out by selecting the microorganisms that are capable of producing a halo/clear zone on a plate owing to the production of organic acids into the surrounding medium. It is a well-known fact that as the particle size of rock phosphate decreases, the microbe mediated solubilization of rock phosphate increases in soil. In the present investigation, microbial solubilization of nano rock phosphate (〈 100 nm) particles was studied. Experimental results revealed that Pseudomonas striata solubilized 11.45% of the total P after 24 h of incubation from nano rock phosphate particles while 28.95% and 21.19% of the total P was solubilized by Aspergillus niger (black pigmented) and Aspergillus niger (green pigmented), respectively. It was also observed that Aspergillus niger has the higher ability to dissolve Udaipur rock phosphate than Pseudomonas striata. 展开更多
关键词 Nano rock phosphate PHOSPHORUS microbes soil Aspergillus spp. phosphate-solubilizing microorganisms organicacids particle size.
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