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Chemical additives added to improve the efficiency of the operation during the beneficiation process are collectively referred to as ore dressing agents. According to the beneficiation process, it mainly includes grinding aids, flotation reagents, filter aids, surface modifiers, and the like.
The emergence of yellow medicine in 1925 and black medicine in 1926 greatly promoted the development of the mineral processing industry. Followed oxide ore collector and collector of amine, the type of ore flotation process greatly expanded, also contributed to the flotation reagents varieties increased year by year. In the 1960s, in addition to continuing to use xanthate, black medicine and fatty acid soaps, non-ionic collectors such as thiourethane, xanthate and xanthate and various typical chelate collectors appeared. Such as 8-hydroxyquinoline, hydroxamic acid and diphenylthiourea. It is characterized by better selectivity and less use of inhibitors to complete preferential flotation; the amount is smaller, and many have foaming properties, which reduces the unit consumption of foaming agents in some large-scale plants. At the same time, the research on flotation theory began. In the 1970s and 1980s, Wang Dianzuo and other researches on the theory and molecular design of flotation agents made the development of new agents more scientific and predictable. .
With the poverty, miscellaneous and refinement of resources, the difficulty of mineral flotation is increasing day by day. In order to improve the separation accuracy of complex symbiotic minerals, flotation reagents are required to have good selectivity. Fine, mud minerals and the quality requirements of concentrates have also prompted the emergence and development of grinding aids and filter aids. The development of filter aids (also known as dehydrators) is particularly rapid. At the same time, the emphasis on environmental protection and ecological environment has also put forward requirements for non-toxic and low-toxicity of mineral processing chemicals. The continuous innovation of chemical product development technology and pharmaceutical testing technology has also led to the development of mineral processing chemicals.
On the basis of traditional pharmaceuticals, research on new types of pharmaceuticals has emerged. Its main features are 1 modified agents: that is, based on existing pharmaceutical agents, various groups with strong selectivity or affinity are introduced. For example, the introduction of a strong affinity group into a small molecule surfactant increases its selectivity of collection, and introduces a highly selective group into the macromolecular polymer surfactant to increase its flocculation selectivity. 2 Compounding agents: Using the synergistic effect of rational compounding of pharmacy to improve the efficiency of various types of mineral processing, it is an effective way and development trend of high efficiency and low cost of pharmaceuticals. 3 Development of new surfactants: research on new polymer surfactants and special types of surfactants. â‘£ chelating agents: development can occur with metal chelating agents to increase selectivity.
The emergence of yellow medicine in 1925 and black medicine in 1926 greatly promoted the development of the mineral processing industry. Followed oxide ore collector and collector of amine, the type of ore flotation process greatly expanded, also contributed to the flotation reagents varieties increased year by year. In the 1960s, in addition to continuing to use xanthate, black medicine and fatty acid soaps, non-ionic collectors such as thiourethane, xanthate and xanthate and various typical chelate collectors appeared. Such as 8-hydroxyquinoline, hydroxamic acid and diphenylthiourea. It is characterized by better selectivity and less use of inhibitors to complete preferential flotation; the amount is smaller, and many have foaming properties, which reduces the unit consumption of foaming agents in some large-scale plants. At the same time, the research on flotation theory began. In the 1970s and 1980s, Wang Dianzuo and other researches on the theory and molecular design of flotation agents made the development of new agents more scientific and predictable. .
With the poverty, miscellaneous and refinement of resources, the difficulty of mineral flotation is increasing day by day. In order to improve the separation accuracy of complex symbiotic minerals, flotation reagents are required to have good selectivity. Fine, mud minerals and the quality requirements of concentrates have also prompted the emergence and development of grinding aids and filter aids. The development of filter aids (also known as dehydrators) is particularly rapid. At the same time, the emphasis on environmental protection and ecological environment has also put forward requirements for non-toxic and low-toxicity of mineral processing chemicals. The continuous innovation of chemical product development technology and pharmaceutical testing technology has also led to the development of mineral processing chemicals.
On the basis of traditional pharmaceuticals, research on new types of pharmaceuticals has emerged. Its main features are 1 modified agents: that is, based on existing pharmaceutical agents, various groups with strong selectivity or affinity are introduced. For example, the introduction of a strong affinity group into a small molecule surfactant increases its selectivity of collection, and introduces a highly selective group into the macromolecular polymer surfactant to increase its flocculation selectivity. 2 Compounding agents: Using the synergistic effect of rational compounding of pharmacy to improve the efficiency of various types of mineral processing, it is an effective way and development trend of high efficiency and low cost of pharmaceuticals. 3 Development of new surfactants: research on new polymer surfactants and special types of surfactants. â‘£ chelating agents: development can occur with metal chelating agents to increase selectivity.
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