| 钾长石的绿色化综合利用工艺 |
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| 引用本文： | 孙晓华,刘佳囡,申晓毅,翟玉春.钾长石的绿色化综合利用工艺[J].矿产综合利用,2015,36(6). |
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| 作者姓名： | 孙晓华 刘佳囡 申晓毅 翟玉春 |
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| 作者单位： | 东北大学材料与冶金学院 |
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| 基金项目： | 国家自然科学基金资助项目NO.51204054；国家重点基础研究发展计划项目（2007CB613603） |
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| 摘 要： | 针对辽宁某地钾长石的特点，设计了一条绿色化综合利用工艺流程。采用Na2CO3中温焙烧，在较低温度下破坏钾长石的结构。碱溶焙烧熟料得到Na2SiO3溶液和K、Na、Al的富集渣。碳分Na2SiO3溶液制取白炭黑。酸化K、Na、Al的富集渣，经水浸、过滤得到白炭黑和含K、Na、Al的溶液。Na2CO3沉铝得到Al(OH)3与K、Na分离。Na2SO4、K2SO4循环至一定浓度后分步结晶得到Na2SO4和K2SO4晶体。可采用CO还原Na2SO4制得Na2S。整个工艺流程实现了Si、K、Na、Al的综合利用，无废弃物排放。
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| 关 键 词： | 钾长石 碳酸钠 氢氧化铝 白炭黑 硫酸钾 硫化钠 |
Technology for comprehensive utilization of potash feldspar |
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| Sun Xiaohu,Liu Jiaru,Shen Xiaoyi and Zhai Yuchun.Technology for comprehensive utilization of potash feldspar[J].Multipurpose Utilization of Mineral Resources,2015,36(6). |
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| Authors: | Sun Xiaohu Liu Jiaru Shen Xiaoyi and Zhai Yuchun |
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| Affiliation: | School of Materials and Metallurgy, Northeastern University |
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| Abstract: | A novel clean technology for potash feldspar in Liaoning Province was presented. The structure of potash feldspar was destroyed by roasting using Na2CO3. Na2SiO3 solution and residue rich in K, Na, Al were obtained by alkali leaching, respectively. Silica white was prepared by carbonating Na2SiO3 solution using CO2. The residue rich in K, Na, Al was acidized by H2SO4. Silica white and acid solution composed of K, Na, Al were obtained through water leaching, filtering, respectively. Al(OH)3 was synthesized by adding Na2CO3 solution into the filtrate to achieve the separation of Al from K and Na. When the concentrations of Na2SO4 and K2SO4 reached up to a certain degree, fractional crystallization was adopted to get Na2SO4 and K2SO4, respectively. Na2SO4 could be reduced to Na2S by CO. Si, K, Na, Al were extracted and transformed into products in the whole technology, respectively. Then achieved the comprehensive utilization of potash feldspar and no pollutant was discharged. |
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| Keywords: | Potash Feldspar Sodium Carbonate Aluminium Hydroxide Silica White Potassium Sulfate Sodium sulfide |
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