Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for efficiently recycling lead-zinc tailings
The invention relates to a method for efficiently recycling lead-zinc tailings. The method comprises the following steps: mixing and grinding the lead-zinc tailings, sodium carbonate and calcium ferrite, roasting, adding a sodium metaaluminate solution, and filtering to obtain a first filtrate and a first dissolved-out slag; introducing CO2 into the first filtrate for carbonation; filtering to respectively obtain a second filtrate and a second dissolved-out slag, mixing the first dissolved-out slag and the second dissolved-out slag, adding strong ammonia water for leaching, and filtering and separating a period of time later to obtain a silicate precipitate and an ammonium metaaluminate solution; and concentrating the second filtrate to obtain solid sodium carbonate capable of realizing cyclic utilization. The method has the advantages of being simple in technological process, free of special requirements for equipment, low in energy consumption, good in technological parameter controllability, low in cost, capable of achieving industrialization easily and the like, and a new way is opened up for efficient recycling of the lead-zinc tailings.
本发明涉及一种铅锌尾矿高效资源化的方法，该方法将铅锌矿尾矿、碳酸钠与铁酸钙混合、研磨后，进行焙烧、加入偏铝酸钠溶液、过滤后得到第一滤液和第一溶出渣；第一滤液通入CO进行碳分；过滤，分别得第二滤液和第二溶出渣，将第一溶出渣和第二溶出渣合并后加入浓氨水进行浸出，一段时间后，过滤分离获得硅酸盐沉淀和偏铝酸铵溶液；第二滤液浓缩固体碳酸钠，可实现循环利用。本发明的方法具有其工艺过程简单、对设备无特殊要求、能耗低、工艺参数，可控性好，成本低，容易实现工业化等优点，为铅锌矿尾矿高效资源化利用开辟了新的途径。
Method for efficiently recycling lead-zinc tailings
The invention relates to a method for efficiently recycling lead-zinc tailings. The method comprises the following steps: mixing and grinding the lead-zinc tailings, sodium carbonate and calcium ferrite, roasting, adding a sodium metaaluminate solution, and filtering to obtain a first filtrate and a first dissolved-out slag; introducing CO2 into the first filtrate for carbonation; filtering to respectively obtain a second filtrate and a second dissolved-out slag, mixing the first dissolved-out slag and the second dissolved-out slag, adding strong ammonia water for leaching, and filtering and separating a period of time later to obtain a silicate precipitate and an ammonium metaaluminate solution; and concentrating the second filtrate to obtain solid sodium carbonate capable of realizing cyclic utilization. The method has the advantages of being simple in technological process, free of special requirements for equipment, low in energy consumption, good in technological parameter controllability, low in cost, capable of achieving industrialization easily and the like, and a new way is opened up for efficient recycling of the lead-zinc tailings.
本发明涉及一种铅锌尾矿高效资源化的方法，该方法将铅锌矿尾矿、碳酸钠与铁酸钙混合、研磨后，进行焙烧、加入偏铝酸钠溶液、过滤后得到第一滤液和第一溶出渣；第一滤液通入CO进行碳分；过滤，分别得第二滤液和第二溶出渣，将第一溶出渣和第二溶出渣合并后加入浓氨水进行浸出，一段时间后，过滤分离获得硅酸盐沉淀和偏铝酸铵溶液；第二滤液浓缩固体碳酸钠，可实现循环利用。本发明的方法具有其工艺过程简单、对设备无特殊要求、能耗低、工艺参数，可控性好，成本低，容易实现工业化等优点，为铅锌矿尾矿高效资源化利用开辟了新的途径。
Method for efficiently recycling lead-zinc tailings
一种铅锌尾矿高效资源化的方法
PAN AIFANG (Autor:in) / MA RUNYONG (Autor:in) / SUN YUE (Autor:in) / MA YUZHAO (Autor:in) / LI KUIMENG (Autor:in) / CHANG JIE (Autor:in) / SHI GUOYI (Autor:in) / HU SHENTAO (Autor:in)
21.04.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C01B
NON-METALLIC ELEMENTS
,
Nichtmetallische Elemente
/
C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
,
Verbindungen der Metalle Beryllium, Magnesium, Aluminium, Calcium, Strontium, Barium, Radium, Thorium oder der Seltenen Erden
/
C04B
Kalk
,
LIME
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