Bayer alumina
production process patented in 1889. Since then, the technology improved and
reached a modern level, but has a lot of problems of technological, economic
and environmental nature.
One of the problems is
the cleaning industrial autoclaves of sodium aluminosilicate, calcium
compounds, titanium and others. We can
offer a new way of cleaning Equipment and Batteries autoclaves.
When only part of the
decomposition of sodium aluminate goes into aluminum hydroxide. Remaining
amount of (mother solution) is supplied to the soda evaporation for selection.
After separation of the
soda solution containing sodium aluminate and alkali, and has negotiable
solution.
Education in the
technological process and the presence of soda in the mother liquor of organic
impurities compels today by evaporation to separate the "the redhead
soda" was calcined it at
We can offer a new way, excludes the formation
of "white mud",
excluding the shaft kiln calcination of limestone and lime milk preparation
plot, saving energy.
We can offer a new way of processing has
already accumulated "white mud" with the return of aluminum and getting cheap
commercial calcium chloride.
When processing the raw material with an alkali to obtain sodium aluminate and insoluble silicon oxide and the product obtained is reacted with sodium aluminate to form sodium aluminate, silicon and alkali (Na2O*Al2O3*1,7SiO2*2H2O + 2NaOH). This compound is precipitated, forming a very expensive waste product containing the desired raw materials aluminum, technological raw materials - alkali concentrate macro- microelements and REE.
FIG. 3.
Place of bottling of red mud (about 2 million m3) in
http://www.youtube.com/watch?v=0UMLn09TJN0
FIG. 4.
Place sludge storage dam (about 2 million. M3) in
http://www.youtube.com/watch?v=0UMLn09TJN0
Thus, in the production
of alumina generated "red mud"
(RM) hydroaluminosilicates containing ferrous hydroxide, titanium oxide,
alkali and other contaminants. We can
offer a new advantageous method for processing "red mud". Storage
of waste production of "red mud" is fraught with spills, dust, air
and soil and groundwater.
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