Low al-si ratio gradient and micro bubble bauxite flotation technology and industrial applications
low al-si ratio gradient and micro bubble bauxite flotation technology and industrial application with the rapid increase of production capacity of alumina industry in China, al-si ratio greater than 9 high quality bauxite resources consumed. Bauxite and al-si ratio ( A/S） Are declining, now part of the alumina enterprises into the grinding bauxite even A/S has been reduced to 4. Below 0, quality decline of bauxite resources and resource shortage has become an outstanding problem restricting the development of aluminum industry in China. Project for al-si bauxite, than about 4 or less system to carry out the low aluminum silicon than bauxite process mineralogy, mineral dissociation characteristics, selective grinding, high efficiency flotation reagents and micro bubble flotation research. Developed low al-si ratio gradient and micro bubble bauxite flotation technology, solve the low aluminum silicon than the problem of efficient utilization of bauxite resources. Technology innovation includes: 1, based on the process mineralogy settlement characteristics research, revealed that with the decreasing ore al-si ratio, disseminated extent aluminum and aluminum alloy profiles and disseminated relationship between silicate minerals is more complex, dissociation between aluminum and silicon minerals more difficult, the basic rules of selective grinding and gradient for subsequent flotation technology development to provide the basis. 2, developed a hard LvShiXing monohydrate bauxite selective grinding technology, realize the selectivity of monohydrate hard between diaspore and silicate minerals disintegrate. Developed low al-si ratio bauxite flotation separation efficiency collector, improve the comprehensive performance of the collector. Based on a new type of flotation reagents and micro bubble flotation equipment to realize the low aluminum silicon micro bubble flotation technology than bauxite, improves the microgranular monohydrate hard between diaspore and silicate minerals flotation separation efficiency. 3, develop the low aluminum silicon than bauxite gradient and micro bubble flotation technology, through adjusting flotation operation parameters ( Including pulp dispersion, pulp density, type and concentration, the flotation machine speed, your and buoyancy on the grain size of product, etc. ) , build the bauxite flotation efficiency and the gradient changes of the relationship between process parameters and to realize the selective grinding, mixing control, system, process structure between the process parameters, such as high efficiency coupling. New technology in henan nonferrous huiyuan aluminium co. , LTD. , realize the industrial application, the al-si ratio of A/S3. 60 - 4. 87 of run of mine ore, flotation concentrate A/S is 7. 37 - 10. 28, the pure mineral rate was 61. 37% - 80. 0%, tailings A/S to 1. 18 - 1. 37, alumina recovery was 73. 25% - 85. 08%, good technical index. Get profits from 2012 to 2014, a total of 13864. 940000 yuan, the economic benefit is remarkable. Project application 5 invention patents, licensing four, published more than 10 papers, has been in henan nonferrous huiyuan aluminium co. , LTD and other units for application, for low al-si ratio bauxite resources efficient use provides the technical support.