The technology of preparation of filter medium for liquid aluminium using high temperature alumina as main raw material and aluminium hydroxide as binder is introduced in detail.
详细介绍了用高温氧化铝为主要原料，氢氧化铝为粘结剂合成原料，制作铝液过滤介质的技术。
2
An apparatus for producing a low-soda alumina, comprising a calciner for calcining aluminum hydroxide in the presence of a soda-removal agent, by which alumina dust is produced;
Sodium aluminate solution is purified and is seed-precipitated with addition of super-fine alumina with high activity to prepare super-fine and high-purity aluminum hydroxide and alumina.