• Mon - Sun: 24/7 online service for you
Get A QUOTE

us patent 4029737 redox treatment of alunite ore

Alunite processing method selection using the AHP and ... - ScienceDirect

There is a wide range of processing methods for alunite that are created in order to access the maximum recovery of alumina and its peripheral products, using various operation units such as preconcentration, calcination, leaching, and crystallization, utilizing different reagents including acids and bases.

WhatsApp:+8617329420102

Recovery of alumina values from alunite ore - Google Patents

A novel process for the recovery of alumina and potassium sulfate from alunite is provided comprising leaching the alunite with potassium hydroxide to which no sodium materials have been added, said leach solution being saturated with potassium sulfate. Aluminum values are solubilized into the leachate, and potassium and sulfur values are rendered soluble, but remain in the residue.

WhatsApp:+8617329420102

US3890425A - Redox treatment of alunite ore - Google Patents

This invention relates to a method for recovering aluminum hydroxide from alunite ore by roasting the ore to remove water of hydration, roasting it again in a reducing atmosphere to remove sulfate, roasting a third time in an oxidizing atmosphere to convert any sulfides formed in the second roast, leaching with water to remove potassium and sulfate, extracting the aluminum content with a ...

WhatsApp:+8617329420102

People also downloaded these free PDFs - Academia.edu

on the 25 26 basis of this figure, the activation energy for leaching of alunite in koh is 94.18kj/mol. 27 28 the high value of activation energy indicates that the reaction rate is controlled by the 29 chemical reaction at the surface. 30 31 4.5 kinetics model 32 33 the following model describes the progress of reaction of alunite with potassium .

WhatsApp:+8617329420102

All Information about Douglas Stevens - Radaris

3529 Leesburg Ct APT 201, Alexandria, VA 22302 Waldorf, MD 32 British Ln, Cameron, NC 28326 Spring Lake, NC Navarre, FL Gulf Breeze, FL phone number (757) 962-8444 (910) 497-1452 view more Douglas Stevens Age 53 / Oct 1968 View Profile 535 N 3500 W, West Point, UT 84015 also known as Douglas W Stevens Doug Stevens William Stevens related to

WhatsApp:+8617329420102

Dehydroxylation Kinetics of Alunite | Request PDF - ResearchGate

On the basis of thermogravimetric results and sulfur loss, dehydroxylation of alunite occurs from 508 to 577 °C. In this temperature range, temperature and time, as well as their interaction, have...

WhatsApp:+8617329420102

Process for alunite treatment - NASYROV; GAKIF ZAKIROVICH

The invention provides a comprehensive method of treatment of alunite ores the associated rock whereof comprises silica in the form of opal and chalcedony earlier believed to be refractory to comprehensive treatment by alkaline methods. Inventors: Nasyrov, Gakif Zakirovich (Leningrad, SU) Zemlyanskaya, Evgenia Ivanovna (Leningrad, SU)

WhatsApp:+8617329420102

(PDF) Alunite processing method selection using the AHP ... - ResearchGate

Abstract and Figures Alunite is the most important non bauxite resource for alumina. Various methods have been proposed and patented for processing alunite, but none has been performed at...

WhatsApp:+8617329420102

Redox treatment of alunite ore - Southwire Company - FreePatentsOnline

Redox treatment of alunite ore . United States Patent 4029737 . Abstract: This invention relates to a method for recovering aluminum hydroxide from alunite ore by roasting the ore to remove water of hydration, roasting it again in a reducing atmosphere to remove sulfate, roasting a third time in an oxidizing atmosphere to convert any sulfides ...

WhatsApp:+8617329420102

Related Posts

Solve the problem?
Get the latest quotation? Hit The Button.

Online Service