Analysis and Prevention of the Scale in Bayer Precipitation Tanks
ZHOU Dingfang
ZHAO Yu
XU Liangzhen
Abstract：According to the practical situation of an alumina factory in Shandong Province using Australia bauxite to Bayer process, the excessive scale growth causing some precipitation tanks to sink was researched. The main ingredient of the scale in the tanks, monoclinic α-Al(OH)3 was determined by the analysis of ingredient and surface topography. Analysis showed that the excessive scale growth was attributed to the superfluous slurry foam, excessive level in temperature dropping, large amounts of oxalate precipitation, bad use of additive, etc. Based on the actual production, the following measures were suggested to slow down the scale growth: temperature dropping, slurry foam eliminating, organics removing, frequency and effect of soda-washing, and equipment improving etc.
Keywords：Bayer processprecipitation tankscaleα-Al(OH)3
Publication Date：2015-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：4( 21-23,26 )