Production process for combining high-temperature dissolution and low-temperature dissolution of multiple bauxite sources

Abstract

The invention discloses a production process for combining high-temperature dissolution and low-temperature dissolution of multiple bauxite sources, wherein the production process is implemented by using a high-temperature dissolution line and a low-temperature dissolution line and comprises the following steps: step 1) grinding ore and proportioning; step 2) carrying out pre-desilicication; step 3) dissolving out; step 4) diluting; step 5) separating; step 6) finely filtering and decomposing; step 7) evaporating and blending; and step 8) washing. According to the process, high-temperature dissolving, low-temperature dissolving and grinding blending processes can be organically combined so as to adapt to different types of ores to meet the production requirements, and the purposes of high ore dissolving rate, good red mud settling performance, low comprehensive energy consumption and low investment and operation cost are achieved.

Description

technical field [0001] The invention relates to the technical field of alumina production, in particular to a production process for combining high and low temperature dissolution of various bauxite sources. Background technique [0002] With the gradual depletion of domestic bauxite resources, the amount of bauxite imported by the alumina production industry is increasing. Imported bauxite mainly includes high-silicon gibbsite, low-silicon gibbsite and boehmite, and some gibbsite is also mixed with a small amount of boehmite and a large amount of aluminum goethite. Many alumina factories often lock the ore source first in the design of the production plan, and then adopt a single low-temperature dissolution process or high-temperature dissolution process according to the phase of alumina in the ore source; but in the actual production process, the source of imported ore is often difficult to single Locked, there will be great uncertainty based on ore prices and export quot...

AI Technical Summary

Problems solved by technology

[0003] In view of the diversity of ore source types and the complexity of its phase composition, the present invention provides a production process for combining high and low temperature dissolution of various bauxite sources, which can combine high temperature dissolution, low temperature dissolution and grinding Organic combination to adapt to different types of ores to meet the needs of production, to achieve high ore dissolution rate, good red mud sedimentation performance, low comprehensive energy consumption, low investment and operating costs

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