Grind grading technique for aluminum oxide raw material - monohydrallite

Abstract

The invention relates to a grading process technology containing two procedures of grinding ore and grading in processing monohydrallite. Grinding equipment adopts two-bin overflow ball mill and grading equipment adopts hydraulic cyclone group, which cooperate with each other to form closed-circuit grading flow process. Two-bin overflow ball mill equips compartment board that can be adjusted to separate mill into two bins. The invention simplifies procedure and makes the operation convenient.

Description

technical field

[0001] The present invention relates to the production of alumina, in particular to the refining process of bauxite, the raw material for alumina. Background technique

[0002] The raw ore pulp preparation is an important production process in the raw material workshop of the alumina plant. Its function is to grind the bauxite and lime to a qualified fineness, and add the circulating mother liquor to prepare a qualified raw ore slurry for use in the subsequent dissolution workshop. The qualification rate index of raw ore pulp directly affects the technical index of the dissolution process and the technical and economic index of the whole plant. After searching, there are only a small number of patent applications related to the bauxite refining process, such as No. 02125586.5 "Method for Adding Lime in Alumina Production Process" and so on.

[0003] At present, there are two main raw ore pulp preparation processes used in alumina plants:

[0004] (1) One-st...