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Hydrometallurgical process and method for recovering metals

A technology of metals and valuable metals, applied in the direction of rare earth metal fluorides, chemical instruments and methods, rare earth metal compounds, etc., to reduce the cost of reactants and transportation requirements, reduce the demand for fresh water, and reduce operating costs

Inactive Publication Date: 2017-11-24
MOLYCORP MINERALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This often requires mine operators to build sufficient power generation equipment at high capital and operating costs

Method used

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  • Hydrometallurgical process and method for recovering metals
  • Hydrometallurgical process and method for recovering metals
  • Hydrometallurgical process and method for recovering metals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0141] 1. A method comprising:

[0142] (a) contacting the metal value-containing material with an acidic leach solution to form a rich leachate comprising dissolved metal values;

[0143] (b) recovering said dissolved metal value to form a metal value product and a by-product brine solution from the reaction of an acid component of said leach solution with a base;

[0144] (c) converting said by-product brine solution to said acid component and said base by at least one of a chlor-alkali and a bipolar membrane electrodialysis cell;

[0145] (d) recycling the acid component to step (a) as part of the acid leach solution; and

[0146] (e) recycling the base to at least one of steps (a) and (b).

[0147] 2. The method of item 1, wherein at least a majority of said by-product brine solution is converted to said acid component and base, and wherein at least a majority of said acid component and base are recycled.

[0148] 3. The method of item 1, wherein the valuable metal is a...

Embodiment A

[0242] Example A is the determination of a multi-stage precipitation and ion exchange process for the removal of divalent and trivalent cations prior to salt splitting treatment. Figure 4 and Figure 5 The reduction of divalent alkaline earth metal (especially magnesium, calcium, strontium and barium) and trivalent (lanthanum, cerium, praseodymium, neodymium, samarium and iron) cations after each precipitation and ion exchange stage are shown, respectively.

[0243] M1 is the first precipitation stage ( image 3 ), wherein a salt solution having a pH of about pH 7 (e.g., the by-product salt solution 224, the metal value-depleted salt solution 216, or a combination thereof (combined solution 228) as described above) contacts a Sodium carbonate solution at a pH of about pH 9.5 to form a metal carbonate slurry. Sodium carbonate was dissolved in water with stirring to form the sodium carbonate solution. The metal carbonate slurry has metal carbonate precipitates dispersed in b...

Embodiment B

[0249] Embodiment B is trivalent cation in chelating ion exchange resin ( image 3 Determination of load capacity on IX1) in. The chelating ion exchange resin evaluated was an iminodiacetoxy resin sold under the trademark Amberlite IRC-748i by Rohm & Haas. The trivalent cation is lanthanum. By adding about 400 mg of lanthanum oxide (La 2 o 3 ) was dissolved in hydrochloric acid (about 3.7 ml of 2N HCl) to obtain a pH of about pH 4, about 50 g / L NaCl and 83 mg / L lanthanum (as LaCl 3 ) of the lanthanum feed solution. After dissolving the lanthanum oxide, about 200 grams of NaCl was added, the pH was adjusted to about pH 4 with 1 N NaOH and deionized water was added to give a final volume of about 4 liters. The column was packed with Amberlite IRC-748i. The lanthanum feed solution was passed through the packed column at a rate of about 2.05 mL / min at about 21 degrees Celsius (see Image 6 ). The maximum trivalent cation capacity of the iminodiacetoxy resin was determined ...

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Abstract

The invention relates to a hydrometallurgical process and a method for recovering metals. The mineral processing facility is provided that includes a cogen plant to provide electrical energy and waste heat to the facility and an electrochemical acid generation plant to generate, from a salt, a mineral acid for use in recovering valuable metals.

Description

[0001] This application is a divisional application of the patent application with the application number 201180015472.9, the application date is January 21, 2011, and the invention title is "hydrometallurgical method and metal recovery method". [0002] Cross References to Related Applications [0003] This application claims the benefit of U.S. Provisional Application Serial Nos. 61 / 297,536, filed January 22, 2010, 61 / 427,745, filed December 28, 2010, and 61 / 432,075, filed January 12, 2011, all of which have Like titles, each are incorporated by reference in their entirety. technical field [0004] The present disclosure relates generally to mineral processing plants and equipment and in particular to hydrometallurgical plants and plants for recovery of metals. Background technique [0005] A common method for recovering valuable metals from ores and concentrates is leaching with mineral acids. For example, rare earth metals are typically recovered from bastnaesite using...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/02C22B3/04C22B3/20C22B3/42C22B23/00C22B34/34C25B7/00C01F17/235
CPCC22B3/02C22B3/04C22B3/20C22B3/42C22B23/00C22B34/34C25B7/00C01F17/235Y02P20/129Y02P10/20C22B11/00C22B15/00C22B59/00C01F17/30C01F17/265
Inventor J.伯巴
Owner MOLYCORP MINERALS
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