Decomposition classification method in aluminium oxide production
A classification method and alumina technology are applied in the purification of aluminate/alumina/aluminum hydroxide, the preparation of alkali metal aluminate/alumina/aluminum hydroxide, etc. The strength requirements, the classification effect cannot meet the requirements, the feed pressure cannot meet the requirements, etc., to solve the problem of periodic refinement, solve the poor classification effect, and the feeding pressure is stable.
Active Publication Date: 2006-07-26
GUIZHOU BRANCH CHINA ALUMINUM IND
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] At present, the decomposition tanks for domestic alumina production use air agitation. Under the stripping conditions of the high-pressure stripper, the insoluble diaspore ore is processed. Due to the high concentration of the decomposition stock solution and the high molecular ratio, the high concentration and high molecular ratio are used. Solution production of sandy alumina is difficult to meet the particle size and strength requirements of sandy alumina
In addition, the cyclone fine screen was originally used as the grading equipment. Because the feed pressure does not meet the requirements, the sieve is easy to wear and deform, the process is complicated, and it is difficult to operate and control, etc., the grading effect cannot meet the requirements, and the operating cost is high.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0014] Embodiment of the present invention: After the sodium aluminate solution enters the decomposition tank for decomposition, the height difference between the decomposition tank and the spinner is used to make the decomposed slurry enter the spinner from the decomposition tank in a self-pressurized feeding mode, so that both can ensure The feed pressure of the spinner is stable, and there is no need to use a pump for transportation, which saves energy. At the same time, a kind of mother liquid pipe is connected to the feed port of the spinner, and the filtrate obtained after filtering the decomposed slurry is diluted through the feed pipe to dilute the slurry, which effectively solves the problem of poor classification effect of high solid pulp. The feed pressure of the spinner is controlled at 0.03-0.1Mpa through the valve on the feed pipe, and the solid content of the feed is controlled at about 500g / l. The classification effect is: the difference between the -320# partic...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A decomposing and classifying process for producing aluminium oxide includes decomposing the solution of sodium aluminate, feeding the decomposed slurry in centrifugal cyclone whild diluting the slurry by filtered mother liquid, returning the overflowed liquid back to decomposing tank, collecting the fluid from the bottom of cyclone, and liquid-solid separation to obtain the solid aluminium oxide. Its advantages are high strength and warse granularity.
Description
Technical field: [0001] The invention relates to a decomposition and classification method for alumina production. technical background: [0002] At present, the decomposition tanks for domestic alumina production use air agitation. Under the stripping conditions of the high-pressure stripper, the insoluble diaspore ore is processed. Due to the high concentration of the decomposition stock solution and the high molecular ratio, the high concentration and high molecular ratio are used. Solution production of sandy alumina is difficult to meet the particle size and strength requirements of sandy alumina. In addition, the cyclone fine screen was originally used as the grading equipment. Because the feed pressure does not meet the requirements, the sieve is easy to wear and deform, the process is complicated, and it is difficult to operate and control, etc., the grading effect cannot meet the requirements, and the operating cost is high. [0003] Therefore, in order to produce ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/14C01F7/46
Inventor 柳健康王月清王军王奎赵荣王强
Owner GUIZHOU BRANCH CHINA ALUMINUM IND