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Solid-liquid-separation processing method, and hydrometallurgical method for nickel oxide ore

A technology of solid-liquid separation and treatment method, applied in separation methods, precipitation separation, chemical instruments and methods, etc., can solve the problem of increasing the number of stages in the initial investment of the installation space, and achieve the effect of reducing the installation space and reducing equipment investment.

Inactive Publication Date: 2015-10-21
SUMITOMO METAL MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of installation space and the limitation of initial investment, it is impossible to increase the number of stages without limit

Method used

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  • Solid-liquid-separation processing method, and hydrometallurgical method for nickel oxide ore
  • Solid-liquid-separation processing method, and hydrometallurgical method for nickel oxide ore
  • Solid-liquid-separation processing method, and hydrometallurgical method for nickel oxide ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] In the solid-liquid separation process of the wet smelting method of nickel oxide ore, the following solid-liquid separation treatment is performed on the leach slurry obtained by the leaching process: figure 2 As shown, the concentrator is connected in a multi-stage manner to perform multi-stage cleaning (CCD method), and at the same time, the solid-liquid component (leach residue) in the leach slurry is separated to obtain a crude nickel sulfate aqueous solution (leach solution). The conditions for the solid-liquid separation treatment are shown below.

[0103] (processing conditions)

[0104]

[0105] In the above-mentioned solid-liquid separation treatment, a predetermined amount of aggregating agent for aggregating the solid content in the leach slurry is added to the concentrator. In Example 1, when adding the aggregation agent, it was added to the feed hole of the first-stage concentrator, and at the same time, a part of the specified amount of the aggregati...

Embodiment 2

[0107] In Example 2, the solid-liquid separation process was performed similarly to Example 1 except having made the ratio of the 1st stage: the 2nd stage into 50:50.

Embodiment 3

[0109] In Example 3, the solid-liquid separation process was performed similarly to Example 1 except having made the ratio of the 1st stage: the 2nd stage into 95:5.

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Abstract

Provided is a method with which, in a solid-liquid-separation processing method for separating and removing solid content in a slurry while performing multi-stage cleaning of the slurry, the clarity of an obtained supernatant liquid can be improved, even in cases when the number of coupled-thickener-apparatus stages is reduced. In this solid-liquid-separation processing method: a thickener apparatus is provided at a plurality of stages, said thickener apparatus being equipped with an agitation tank, and a sediment separation tank provided with an overflow unit for discharging a supernatant liquid at a peripheral edge thereof, said sediment separation tank being also provided with a cylindrical feed well disposed vertically at a central part thereof; and solid content in a slurry is separated while the slurry is cleaned at multiple stages, and the solid content is removed to obtain a liquid solution. In the solid-liquid-separation processing method, when adding an agglomeration agent for causing agglomeration of the solid content in the slurry, a prescribed proportion of the agglomeration agent is added to the feed well of the thickener apparatus at the first stage, and the remainder of the agglomeration agent is added to the overflow unit in the thickener apparatus at the second stage.

Description

technical field [0001] The invention relates to a solid-liquid separation treatment method and a wet smelting method of nickel oxide ore. In addition, this application claims priority based on the Japanese Patent Application No. Japanese Patent Application No. 2013-008659 for which it applied in Japan on January 21, 2013, By referring this application, it takes in in this application. Background technique [0002] In recent years, high pressure acid leaching (High Pressure Acid Leach) using sulfuric acid has attracted attention as a wet smelting method of nickel oxide ore. This method does not include dry processing steps such as drying and roasting steps, but is composed of a consistent wet process, so it has the following advantages: it is advantageous in terms of energy and cost, and can obtain nickel quality improved to about 50% by weight. Nickel cobalt mixed sulphides. [0003] Specifically, the nickel wet smelting method by the high-pressure acid leaching method for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D21/30B01D21/01B01D21/06B01D21/08B01D21/24C22B3/04C22B23/00
CPCC22B23/005B01D21/01B01D21/06B01D21/08B01D21/2427C22B23/043B01D21/2405C22B3/08C22B23/0453
Inventor 三井宏之中井修京田洋治
Owner SUMITOMO METAL MINING CO LTD