Recently, the research results of the "Concentrates' dual-flow method 'Dissolution new process industrialization technology research and application' project have passed the appraisal. This project is a research and development of "Dual-flow" dissolution process technology that combines a diaspore-type flotation concentrate as raw material, a large non-agitation high-pressure dissolver as the core equipment, and indirect preheating and direct heating of the casing. First.
The technical innovations are as follows: Research and design of the "dual-flow method" industrialization technology for diaspore concentrates, effectively inhibiting scarring on the heating surface, realizing industrial applications; research and application of high-concentration circulating alkali ash technology, circulating alkali Liquid caustic alkali concentration 250±5g/l, Lime milk solid content exceeding 300g/l; Development and application of "two-stage batching" process suitable for "shuangliu" dissolution technology; research and development of high-temperature alkali liquor and mineral slurry outside the tank The new method of mixing; research and design for the first time successfully applied the Φ2800×16000mm unstirred high pressure dissolver to Bayer process industrial production.
The research, design and industrial application of the high-temperature enhanced dissolution process for the selected ore concentrate “two-flow method†has low capital investment, high thermal efficiency, and high unit operation rate, providing a new process and equipment for the development of high-pressure dissolution technology for the aluminum industry in China. .