cyanide

Assaying for Cyanide

Methods for the analysis of cyanide silver-plating solutions were studied, including the determination of free cyanide, total cyanide, carbonate, chloride, ammonia, silver, iron, copper, and mercury. Electrometric titrations showed that the Liebig method for alkali cyanide is correct to better than 0.2 per cent. Addition of iodide makes the method

←   Read The Full Metallurgy Article

FREE Cyanide Assay Method

A simple example of the application of a complexation reaction to a titration procedure is the titration of cyanides with silver nitrate solution. When a solution of silver nitrate is added to a solution containing cyanide ions (e.g. an alkali cyanide) a white precipitate is formed when the two liquids first come into contact with one another, but

←   Read The Full Metallurgy Article

How to Collect a Sample for Cyanide Analysis

It is important to make use of composite sampling and to take at least five samples. Grab samples may be representative of flow during a short period and any other sample shown to be representative of waters being sampled may be applicable.

The collection of samples for cyanide determination will require treatment to preserve the constituents. Procedures

←   Read The Full Metallurgy Article

Cyanide Assay Methods

types_of_cyanideSummary of CN Analysis Methods

Description

Name

Method Description Potential Interferences

Measurement

Free Cyanide ASTM D 4282 Passive Diffusion at pH 6 and room temperature •     Storage

•     Measurement

•     Manual chlorination of cyanide with chloramine-T and subsequent reaction with pyridine-barbituric acid.

•     Maximum absorbance is determined by manual colorimetry.

ASTM D 7237Flow ←   Read The Full Metallurgy Article

Cyanide in Nature

Carbon and nitrogen, the two elements that make up cyanide, are present all around us. Together they make up almost 80% of the air we breathe, and both are present in the organic molecules that are the basis of all life forms. Hydrogen cyanide was formed in the earliest stages of the development of our planet as a precursor to amino acids, from

←   Read The Full Metallurgy Article

Why Oxygen is Important in Cyanidation

The Rule and Function of Oxygen in Cyanidation.—Oxygen appears to be an indispensable factor, either directly or indirectly, in the dissolution of gold and silver by cyanide solutions, except in the case of the haloid compounds of silver. Whether the action of oxygen in the dissolution of gold be a direct one, as illustrated by

←   Read The Full Metallurgy Article

BUY Laboratory & Small Plant Process Equipment

We have all the laboratory and plant equipment you need to test or build/operate your plant.

ENTER our Mining Equipment' Store

We Sell EQUIPMENT for all types of Mineral Treatment PROCESSES and Laboratory Testing needs

Do you need METALLURGICAL TESTING of your ORE?

View the Services we Provide

911Metallurgist Mineral Processing & Process Development Laboratory

We have a metallurgical test for every possible mineral type and treatment.

Need ENGINEERING Services or Plant TROUBLESHOOTING?

We can IMPROVE ALL PLANTS / Mineral Processing Engineering & LABORATORY Ore Testing

911Metallurgy Engineering

Contact us for process engineering, metallurgical investigations, plant optimization, plant troubleshooting, needs. WE “FIX” METALLURGY.

I Need Consulting Engineering Help
I Need Ore Laboratory Testing