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Method for preparing silicon-magnesium gel from fine iron powder and residues obtained by asbestos tailing magnetic separation
The invention belongs to the technical field of comprehensive utilization of tailings, and discloses a method for preparing silicon-magnesium gel from fine iron powder and residues obtained by asbestos tailing magnetic separation. The method comprises the following steps: crushing, grinding and sieving asbestos tailings, mixing the asbestos tailings powder with alkali and a carbon-containing material, grinding the mixture, and performing roasting and activating to obtain activated residues; carrying out magnetic separation on the activated residues to obtain fine iron powder and silicon-magnesium residues; soaking the silicon-magnesium residues with alkali liquor, and performing filtering and separating to obtain an alkaline leaching solution and alkaline leaching residues; adjusting the pH value of the alkaline leaching solution to 3-5 by using acid liquor, and introducing CO2 to obtain silicic acid colloid; dissolving the alkaline leaching residues with an acid solution to obtain a magnesium salt solution, and introducing CO2 to obtain a magnesium bicarbonate solution; and mixing the silicic acid colloid with a magnesium bicarbonate solution, adding an organic foaming agent and acuring agent, and performing stirring, mixing, evaporating and drying to obtain the silicon-magnesium gel. According to the method disclosed by the invention, valuable fine iron powder is obtained, silicon-magnesium gel with wide application is prepared, and full-resource comprehensive utilization of asbestos tailings is realized.
本发明属于尾矿综合利用技术领域，公开了一种石棉尾矿磁选铁精粉和残渣制取硅镁凝胶的方法。石棉尾矿经破碎研磨过筛，与碱和含碳材料混合研磨，然后焙烧活化，得到活化残渣；活化残渣经磁选得到铁精粉和硅镁残渣；硅镁残渣用碱液浸渍并过滤分离，得到碱浸溶液和碱浸残渣；碱浸溶液用酸液调节pH值为3～5，通入CO得到硅酸胶体；碱浸残渣用酸液溶解得到镁盐溶液，通入CO得到碳酸氢镁溶液；将硅酸胶体和碳酸氢镁溶液混合，加入有机发泡剂和固化剂，搅拌混合后蒸发干燥，得到硅镁凝胶。本发明方法获得了有价值的铁精粉，并制取了用途广泛的硅镁凝胶，实现了石棉尾矿的全资源化综合利用。
Method for preparing silicon-magnesium gel from fine iron powder and residues obtained by asbestos tailing magnetic separation
The invention belongs to the technical field of comprehensive utilization of tailings, and discloses a method for preparing silicon-magnesium gel from fine iron powder and residues obtained by asbestos tailing magnetic separation. The method comprises the following steps: crushing, grinding and sieving asbestos tailings, mixing the asbestos tailings powder with alkali and a carbon-containing material, grinding the mixture, and performing roasting and activating to obtain activated residues; carrying out magnetic separation on the activated residues to obtain fine iron powder and silicon-magnesium residues; soaking the silicon-magnesium residues with alkali liquor, and performing filtering and separating to obtain an alkaline leaching solution and alkaline leaching residues; adjusting the pH value of the alkaline leaching solution to 3-5 by using acid liquor, and introducing CO2 to obtain silicic acid colloid; dissolving the alkaline leaching residues with an acid solution to obtain a magnesium salt solution, and introducing CO2 to obtain a magnesium bicarbonate solution; and mixing the silicic acid colloid with a magnesium bicarbonate solution, adding an organic foaming agent and acuring agent, and performing stirring, mixing, evaporating and drying to obtain the silicon-magnesium gel. According to the method disclosed by the invention, valuable fine iron powder is obtained, silicon-magnesium gel with wide application is prepared, and full-resource comprehensive utilization of asbestos tailings is realized.
本发明属于尾矿综合利用技术领域，公开了一种石棉尾矿磁选铁精粉和残渣制取硅镁凝胶的方法。石棉尾矿经破碎研磨过筛，与碱和含碳材料混合研磨，然后焙烧活化，得到活化残渣；活化残渣经磁选得到铁精粉和硅镁残渣；硅镁残渣用碱液浸渍并过滤分离，得到碱浸溶液和碱浸残渣；碱浸溶液用酸液调节pH值为3～5，通入CO得到硅酸胶体；碱浸残渣用酸液溶解得到镁盐溶液，通入CO得到碳酸氢镁溶液；将硅酸胶体和碳酸氢镁溶液混合，加入有机发泡剂和固化剂，搅拌混合后蒸发干燥，得到硅镁凝胶。本发明方法获得了有价值的铁精粉，并制取了用途广泛的硅镁凝胶，实现了石棉尾矿的全资源化综合利用。
Method for preparing silicon-magnesium gel from fine iron powder and residues obtained by asbestos tailing magnetic separation
一种石棉尾矿磁选铁精粉和残渣制取硅镁凝胶的方法
SU XINTAI (author) / LIN ZHANG (author) / LAN YINGYING (author) / TIAN LANLAN (author) / ZHU QIAN (author)
2020-07-10
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
B01J
Chemische oder physikalische Verfahren, z.B. Katalyse oder Kolloidchemie
,
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
/
B03C
Magnetische oder elektrostatische Trennung fester Stoffe von festen Stoffen oder flüssigen oder gasförmigen Medien
,
MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS
/
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
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