Aluminium oxide full-automatic on-line spoil removing solid-liquid separation method

Abstract

The invention relates to a method for solid-liquid separation and dreg removal in the process of producing alumina, in particular to a full automatic on-line method for solid-liquid separation and dreg removal in alumina production. The method at least comprises a filtering process A, a filter mass discharging process B and a filter mass removing process C which are carried out repeatedly. A novel sintering net made of a filtering material is utilized to form a novel full automatic continuous type filter. A diluted serous fluid is pumped in from a feed port of the filter; and a material obtained from a discharge port of the filter is a fine solution meeting the requirement of aluminum hydroxide. The filter can realize continuous production by a single filter. The production process is wholly subjected to on-line monitoring; and a computer is used for providing the diluted serous fluid, the flow of the fine solution, the temperature, the solid content, the content of suspended matters and other main technical parameters for the whole production process of the alumina in real time. If equipment is subjected to proper parameter adjustment, the equipment can be conveniently used for the production process of molybdenum industry.

Description

technical field [0001] The invention relates to a method for solid-liquid separation and slag removal in the alumina production process, in particular to a solid-liquid separation method for fully automatic online slag removal of alumina. Background technique [0002] The production process of alumina is to use physical and chemical methods to combine Al 2 o 3 The process of separation from bauxite. Due to the two sides of the nature of aluminum, aluminum exists in a large amount in the state of oxide minerals in nature. And at the same time accompanied by F e , T i , S i , G e , G n , V and other oxide minerals and compound minerals, which makes the separation process of alumina complicated and difficult to grasp. For example, the slurry output from the high-pressure melting process in the Bayer process must be diluted first to reduce the viscosity of the slurry. The diluted serum needs to go through sedimentation tank sedimentation, red mud separation, leaf filtra...

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Problems solved by technology

Since the equipment used in the above process can only work alternately and intermittently, the production efficiency is low, the energy consumption is large, the site occupation is large, the equipment investment is large, the operating cost is high, and the pollution is serious, which directly increases the production of alumina products. cost

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