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Aluminum oxide dissolving device capable of realizing both high-temperature and low-temperature dissolving ways and method thereof

A kind of alumina, high and low temperature technology, applied in the direction of alumina/hydroxide, etc., to avoid restrictions, realize resource complementarity, and enhance strength

Active Publication Date: 2013-11-06
NORTHEASTERN UNIV ENG & RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the existing set of dissolution equipment can only perform one dissolution process, the present invention provides an alumina dissolution equipment and method capable of realizing two dissolution modes of high and low temperature

Method used

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  • Aluminum oxide dissolving device capable of realizing both high-temperature and low-temperature dissolving ways and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The structure of the alumina dissolution device that can achieve high and low temperature dissolution methods is as follows figure 1 As shown, it includes 1~10-stage casing preheater, insulation tank group and 1~10-stage flash evaporator, 1~10-stage casing preheater is connected in series in sequence, and the material outlet of 10-stage casing preheater 4 is connected with The thermal insulation tank group is connected, the thermal insulation tank group is connected with the first-stage flash evaporator 9, the 1-10 flash evaporators are sequentially connected in series, and the material inlet of the 5-stage casing preheater 2 is connected with the material input pipeline;

[0024] The insulation tank group is composed of 10 insulation tanks in series, the first 5 insulation tanks are used as the first half of the insulation tank, and the last 5 insulation tanks are used as the second half of the insulation tank;

[0025] The discharge port of the 10-stage casing preheater 4 ...

Embodiment 2

[0035] The structure of the alumina dissolution device that can implement two dissolution methods is the same as that of Example 1. The difference is that the heat preservation tank group is composed of 8 heat preservation tanks in series, the first 4 heat preservation tanks are used as the first half of the heat preservation tank, and the last 4 heat preservation tanks are used as the back Semi-group insulation tank;

[0036] The above device is used for low-temperature dissolution. The high-pressure steam pipeline is connected to the steam inlet of the 5-stage casing preheater. The 5-stage casing preheater is separated from the 6-stage casing preheater. The material outlet is connected with the second half of the heat preservation tank, the first half of the heat preservation tank is separated from the second half of the heat preservation tank, the first half of the heat preservation tank is connected to the 6-stage flash evaporator, the 5-stage flash evaporator is separated fro...

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Abstract

The invention relates to an aluminum oxide dissolving device capable of realizing two high-temperature and low-temperature dissolving ways and a method thereof, which belong to the field of aluminum oxide production technology. A multistage sleeve pipe preheater, an insulation can group and multistage flash evaporators are divided into a first half group and a second half group; the material outlet of the first half group of the sleeve pipe preheater is communicated with the second half group of the insulation can; and the first half group of the insulation can is communicated with the first flash evaporator of the second half group of the flash evaporator. The method comprises the following steps: when dissolving under high temperature, a complete set of device is adopted for high-temperature dissolving; in case of dissolving at low temperature, the first half group of the sleeve pipe preheater, the second half group of the insulation can and the first half group of the flash evaporator are used as the first set of dissolving device, and the second half group of the sleeve pipe preheater, the first half group of the insulation can and the second half group of the flash evaporator are used as the second set of dissolving device; and the two sets of devices are both used for low-temperature dissolving. With the device and the method disclosed by the invention, the conversion from the high-temperature dissolving process to the low-temperature dissolving process can be realized through changing the dissolving process according to the change of ores.

Description

Technical field [0001] The invention belongs to the technical field of alumina production, and particularly relates to an alumina dissolution device and method that can realize high and low temperature dissolution modes. Background technique [0002] Bauxite refers to the general name of ore that can be used in industry, with gibbsite, boehmite or diaspore as the main minerals; bauxite is the best raw material for the production of metallic aluminum. More than 90% of the world's metal aluminum production is produced from bauxite. [0003] The world's bauxite reserves are 23 billion tons, and the reserve base is 28 billion tons. The countries with rich bauxite resources include: Australia, Guinea, Brazil, Jamaica, India, Hungary, Indonesia; and the world has huge bauxite reserves In comparison, my country's bauxite resources are relatively poor; relevant experts pointed out that according to the estimated reserves, my country's bauxite resource reserves are not optimistic. Some expe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02
Inventor 赵成明罗亚林李宝林
Owner NORTHEASTERN UNIV ENG & RES INST CO LTD