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...

Examples

Embodiment Construction

[0030] The specific embodiment of the present invention is as figure 1 As shown, the filter body at least includes a cylindrical semicircular top cover 20, a guide cylinder 21, a filter 17, and a cone mud discharge mechanism 10 connected with the columnar filter body. A draft tube 21 is connected between the top cover 20 and the filter 17 .

[0031] Filtration process:

[0032] Open the feed valve 13, the feed pump 1 (frequency tuned) will pass the diluted slurry through the filter inlet 22 at a rate of 4-10kg / cm 2 The pressure pumped into the cartridge filter 17 is filtered by the filter cartridge 18, and then the clear liquid outlet is output to the next process by the clear night pump 8 on the side of the guide cylinder 21. A float detector 12 is installed at the outlet of the clear liquid, and the float detector 12 detects whether the float content in the output semen after filtration meets the requirements of the subsequent production process. Generally, the float conte...

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...

Examples

Embodiment Construction

[0030] The specific embodiment of the present invention is as figure 1 As shown, the filter body at least includes a cylindrical semicircular top cover 20, a guide cylinder 21, a filter 17, and a cone mud discharge mechanism 10 connected with the columnar filter body. A draft tube 21 is connected between the top cover 20 and the filter 17 .

[0031] Filtration process:

[0032] Open the feed valve 13, the feed pump 1 (frequency tuned) will pass the diluted slurry through the filter inlet 22 at a rate of 4-10kg / cm 2 The pressure pumped into the cartridge filter 17 is filtered by the filter cartridge 18, and then the clear liquid outlet is output to the next process by the clear night pump 8 on the side of the guide cylinder 21. A float detector 12 is installed at the outlet of the clear liquid, and the float detector 12 detects whether the float content in the output semen after filtration meets the requirements of the subsequent production process. Generally, the float conte...

Images