Process for recovering metals and metal compounds from mined ore and other metal-bearing raw source materials
a metal and raw material technology, applied in the direction of process efficiency improvement, manganese oxide/hydroxide, chromium oxide/hydrate, etc., can solve the problems of ineffective and expensive implementation of current methods for treating and recovering metals from metal-bearing raw materials, difficult to treat and recover metals from metals, etc., to achieve efficient and effective
Inactive Publication Date: 2012-10-04
HALPIN PETER T +2
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Benefits of technology
This method enables efficient and cost-effective selective recovery of metals like nickel (Ni) and chromium (Cr) from complex raw source materials, reducing waste volume and processing costs while allowing for the recovery of additional valuable metals.
Problems solved by technology
The disposal of metal-bearing raw source material containing these metals raises serious environmental and business concerns on a global level due to the hazardous nature, potential toxicity, and risk to human health posed by the presence of these metals.
The costs associated with the disposal of hazardous metal-bearing raw source material in the absence of metal reclamation are enormous.
Current methods for treating and recovering metals from metal-bearing raw source material, however, are often inefficient and expensive to implement.
It has been particularly challenging to treat and recover metals from metal-bearing raw source material that contains Cr, as Cr is difficult to separate from other metals and metal compounds.
However, the presence of Cr dramatically increases the bulk of the nuclear waste.
However, the patent does not reveal any interest in the recovery or separation of other metals that may be present in the Cr-bearing waste.
However, ion exchange is relatively costly, slow, and cumbersome to use.
Thus, ion exchange would be impractical as an initial step for separating metals from complex metal-bearing raw source material.
Furthermore, the series of liquid-liquid extractions and precipitation steps is also inefficient.
When the ion exchange step and series of liquid-liquid extractions and precipitation are used in combination, the method is particularly inefficient and expensive to execute.
Method used
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[0047]The phrase “selectively leach” as used herein means to wash, extract, or perform a chemical reaction to separate a soluble element or compound from an insoluble material.
[0048]The phrase “insoluble form” means an element in free form or compound incapable of or that resists dissolving in a particular solvent.
[0049]A “metal-bearing raw source material” is any material that contains a metal. This includes waste, residue, ore, ore concentrate, byproduct, processed, and / or unprocessed material.
[0050]The phrase “plating sludge” is a hydroxide sludge, which has been formed during the treatment of waste liquor, metal plating, or other metal finishing processes and waste waters which may or may not be dehydrated.
[0051]A “Ni / Cr raw material” is a material that contains Ni and Cr and / or Ni and Cr compounds and potentially other metals of value.
[0052]The phrase “predetermined criteria” means a previously determined standard that a metal-bearing raw source material must meet regarding a s...
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Abstract
A filter cake, including a first metal in an insoluble form and / or filtrate comprising Cr in a soluble form, obtained by a method involving filtering an aqueous slurry of a metal-bearing raw source material comprising the first metal in an insoluble form, soluble and / or insoluble Cr in a Cr bearing material as a second metal, and organic and inorganic compounds, after adjusting the pH of the slurry to an alkaline pH sufficient to convert soluble Cr present to an insoluble form and selectively leaching the Cr by adding a leaching agent in an amount sufficient to convert Cr to a soluble form while the first metal remains in the slurry in an insoluble form.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a divisional of U.S. application Ser. No. 12 / 770,134 filed Apr. 29, 2010 which claims the benefit under 35 USC 119(e) of provisional application No. 61 / 174,205 filed Apr. 30, 2009 and No. 61 / 293,419 filed Jan. 8, 2010, all of which are fully incorporated herein by reference.BACKGROUND[0002]A. Field[0003]The present invention relates to a method for selectively recovering a metal, groups of metals, and / or metal compound(s) from a metal-bearing raw source material containing chromium (Cr).[0004]B. Related Art[0005]Industrial, mining, and manufacturing processes generate large amounts of metal-bearing raw source material on daily basis. This metal-bearing raw source material includes mining ores, ore concentrates, waste products, residues and byproducts. Metal-bearing raw source material often contains valuable nonferrous metals such as chromium (Cr), nickel (Ni), copper (Cu), cobalt (Co), tin (Sn), zinc (Zn), molybdenum ...
Claims
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IPC IPC(8): C22B3/12C22C27/06C22B34/32
CPCC01G37/02C01G45/02C22B3/44C22B7/006C22C19/07C22B23/0453C22B34/32C22C19/03C22B7/008Y02P10/20
InventorHALPIN, PETER T.SCHLEGEL, ULRICH R.SCHNECK, DALE L.
OwnerHALPIN PETER T