Advances in pharmaceutical processing carried out on the development of China's iron ore beneficiation process in particular to raise iron content and reduce silicon work played an important role. Domestically developed iron ore flotation reagents mainly include collectors and inhibitors, and collectors are divided into three categories: anion collectors, cation collectors, and chelate collectors. In recent years, China's mineral processing workers have mainly modified and mixed fatty acids and petroleum sulfonates, which have significantly improved their selectivity and enhanced their ability to capture, especially in the case of anion reverse flotation collectors. progress. The new high-efficiency anion collectors SH-37, MZ-21 and RA-515 have been successfully applied in the red iron ore dressing plant of Anshan Iron and Steel Plant Selection Plant, Qi Dashan Plant and Donganshan Sintering Plant respectively. Iron concentrate grade It has reached 66%~67%, and the cost of ton concentrates has been reduced by more than 15%. The adaptability to temperature has been enhanced and the economic benefits are remarkable. The new high-efficiency collectors MD-28 and MH-80 for the upgrading of magnetite concentrates have been promoted and applied in Lunan Mining Company and Taishan Jianshan Iron Mine, respectively, and the grade of magnet concentrate has increased to over 69%. The newly developed MH-88 special effects collector for sorting Wuyang Iron Mountain Temple lean hematite iron ore, iron concentrate grade of 65%, 72.56% metal recoveries good indicator. Cationic collectors are primarily amine collectors for the flotation of siliceous minerals, including fatty amines and ether amines. There are not many concentrating plants using amine collectors in China, and there are few kinds of pesticides, mainly based on 12-carbon fatty amines and mixed amines. Angang Steel Gongchangling Plant adopted a new cationic collector YS-73. In addition, the new cationic collector GE-601 developed by Wuhan University of Technology has the characteristics of low temperature resistance and high efficiency, which can not only solve the problem of dodecylamine, but also can directly throw tail by magnetic tailing. Streamline the process. The chelate collector forms a stable chelate with metal ions on the surface of the mineral, and its selectivity is significantly higher than that of the fatty acid collector. For example, water-soluble carboxymethyl starch is used in industrial production in Anshan Iron and Steel Plant Selection Plant, which greatly simplifies the preparation process of the medicament and reduces the production cost. The annual benefit is more than 3 million yuan. The iron ore desulfurization special activator MHH-1 has obvious effects on the removal of sulfide ore in iron concentrate, especially pyrrhotite with strong magnetic properties and poor floatability. Compared with other activators, MHH-1 It has the characteristics of low dosage, low cost and obvious desulfurization effect. At present, the product has been successfully applied in many mines. Therefore, the development of this product provides a new way for iron concentrate to reduce iron and reduce sulfur.
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