High-embedding-rate slow-release ferrous microcapsule material and preparation method thereof, hexavalent chromium reducing agent and application: Fid-Bau Portal

High-embedding-rate slow-release ferrous microcapsule material and preparation method thereof, hexavalent chromium reducing agent and application

WANG CHANGQING / QIAN SHANSHAN / SONG NANJING / SI HONGZHEN

Abstract

The invention provides a high-embedding-rate slow-release ferrous microcapsule material, a preparation method thereof, a hexavalent chromium reducing agent and application of the hexavalent chromium reducing agent. Phosphorus-containing industrial by-products and the reducing agent ferrous sulfate are subjected to ball milling to form an iron-phosphorus composite material capable of continuously releasing iron ions, and then the high-embedding-rate slow-release ferrous microcapsule material is prepared in a microcapsule embedding mode. The embedding rate and the stability are improved. The prepared microcapsule is compounded with a grinding aid component, a complexing agent, a dispersing agent and a reinforcing agent to prepare a hexavalent chromium reducing agent for cement production; the reducing agent is added during cement grinding or after cement grinding, has good chromium removal efficiency, greatly improves the stability of the chromium removal agent, prevents the reducing component ferrous sulfate from being oxidized to influence the chromium removal effect, and can improve the grinding efficiency and the cement strength on the premise of not influencing the physical properties of cement.

本发明提供了一种高包埋率缓释亚铁微胶囊材料及其制备方法、一种六价铬还原剂及应用，本发明使用含磷工业副产物与还原剂硫酸亚铁球磨成具有持续释放铁离子的铁磷复合材料，再通过微胶囊包埋的方式制备，提高其包埋率和稳定性。制备的微胶囊与助磨组分、络合剂、分散剂、增强剂复合制备六价铬还原剂，用于水泥生产；本发明还原剂在水泥粉磨中或后添加，具有良好的除铬效率，且大幅提升除铬剂的稳定性，避免还原性组份硫酸亚铁被氧化，影响除铬效果，在不影响水泥物理性能的前提下能够提高磨粉效率和水泥强度。

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