Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention discloses a magnesium slag resource utilization method, which comprises the following steps: a primary dissolution step: adding magnesium slag into a solution A containing a calcium-magnesium solvent, an ion regulator, a calcium compound, a magnesium compound and a crystal form regulator, controlling the pH value in the reaction process to be 8.0-12.0, dissolving calcium oxide in the magnesium slag into the solution, filtering and separating, and collecting the solution A; and calcium-removed magnesium slag and a calcium-containing solution are obtained. And a redissolving step: dissolving calcium oxide, calcium carbonate, magnesium oxide and magnesium carbonate which are not dissolved in the magnesium slag in a solution B containing a calcium and magnesium solvent, an ion regulator, a calcium compound and a magnesium compound by controlling the pH value in the reaction process to be 5.0-10.0, and filtering and separating to obtain tailings and a magnesium-containing solution. And an enrichment step: the magnesium-containing solution passes through a nanofiltration membrane, and the concentrated solution is the high-magnesium solution. The method has the following beneficial effects that on the basis of ammonium salt extraction, a sodium filter membrane is further used, magnesium slag extraction and magnesium separation are separated, and separation and purification of calcium and magnesium are achieved.
本发明公开了一种镁渣资源化利用方法，包括如下步骤，初溶步骤，将镁渣加入到含有钙镁溶剂、离子调节剂、钙化合物、镁化合物、晶型调节剂的溶液A中，控制反应过程pH值在8.0‑12.0之间，使镁渣中的氧化钙溶解在溶液中，过滤分离，得到除钙镁渣和含钙溶液。再溶步骤，除钙镁渣与含有钙镁溶剂、离子调节剂、钙化合物、镁化合物的溶液B中，通过控制反应过程pH值在5.0‑10.0之间，使镁渣中未溶解的氧化钙、碳酸钙、氧化镁、碳酸镁溶解在溶液中，过滤分离，得到尾渣和含镁溶液。富集步骤，含镁溶液通过纳滤膜，浓缩液为高镁溶液。本方法具有如下有益效果：通过采用铵盐浸提的基础上进一步使用钠滤膜，将镁渣的浸出和镁分离隔离开，实现了钙与镁的分离提纯。
The invention discloses a magnesium slag resource utilization method, which comprises the following steps: a primary dissolution step: adding magnesium slag into a solution A containing a calcium-magnesium solvent, an ion regulator, a calcium compound, a magnesium compound and a crystal form regulator, controlling the pH value in the reaction process to be 8.0-12.0, dissolving calcium oxide in the magnesium slag into the solution, filtering and separating, and collecting the solution A; and calcium-removed magnesium slag and a calcium-containing solution are obtained. And a redissolving step: dissolving calcium oxide, calcium carbonate, magnesium oxide and magnesium carbonate which are not dissolved in the magnesium slag in a solution B containing a calcium and magnesium solvent, an ion regulator, a calcium compound and a magnesium compound by controlling the pH value in the reaction process to be 5.0-10.0, and filtering and separating to obtain tailings and a magnesium-containing solution. And an enrichment step: the magnesium-containing solution passes through a nanofiltration membrane, and the concentrated solution is the high-magnesium solution. The method has the following beneficial effects that on the basis of ammonium salt extraction, a sodium filter membrane is further used, magnesium slag extraction and magnesium separation are separated, and separation and purification of calcium and magnesium are achieved.
本发明公开了一种镁渣资源化利用方法，包括如下步骤，初溶步骤，将镁渣加入到含有钙镁溶剂、离子调节剂、钙化合物、镁化合物、晶型调节剂的溶液A中，控制反应过程pH值在8.0‑12.0之间，使镁渣中的氧化钙溶解在溶液中，过滤分离，得到除钙镁渣和含钙溶液。再溶步骤，除钙镁渣与含有钙镁溶剂、离子调节剂、钙化合物、镁化合物的溶液B中，通过控制反应过程pH值在5.0‑10.0之间，使镁渣中未溶解的氧化钙、碳酸钙、氧化镁、碳酸镁溶解在溶液中，过滤分离，得到尾渣和含镁溶液。富集步骤，含镁溶液通过纳滤膜，浓缩液为高镁溶液。本方法具有如下有益效果：通过采用铵盐浸提的基础上进一步使用钠滤膜，将镁渣的浸出和镁分离隔离开，实现了钙与镁的分离提纯。
Resource utilization method of magnesium slag
镁渣资源化利用方法
22.11.2024
Patent
Elektronische Ressource
Chinesisch
| Europäisches Patentamt | 2024