Innovative Processes

Antimony Smelting

China now leads the world in antimony production, having contributed during recent years something over 60 per cent, of the world’s production. The history of the antimony industry of China dates back to 1897 when the Tai Shing Co. was formed, under contract with the Hunan Bureau of Mines, for the smelting of the ore … Read more

Gold Bromination & Gold Chlorination= F(Silver)

When dry chlorine gas is made to act in the cold upon finely-divided gold, it converts the latter with evolution of heat into auro-auric chloride, Au2Cl4, a hard, dark-red, hygroscopic salt. Moisture splits this salt into aurous and auric chloride, Au2Cl4 = AuCl + AuCl3 ; treatment with water converts it into auric chloride and … Read more

Recovery of Mercury from Amalgamation Tailing

In this paper on the recovery of mercury as sulphide, from the residues from the amalgamation and cyanide treatment of high-grade ores and concentrates, I will not discuss the many reactions, chemical and otherwise, that take place in the general process, but confine myself more par­ticularly to the methods of recovering the mercury. I submit … Read more

Ammonia-Carbon Dioxide Ore Treatment

Most metallurgists appreciate the great need of a process for the ex­traction and recovery of valuable metals from complex ore, where the presence of one metal increases the cost of extracting the other metals to such an extent that not any of the metals can be extracted at a profit. We need only refer to some … Read more

Molybdenum Roasting

Molybdenite Roasting with Sulfuric Acid Plant VS Looping Sulfide Oxidation (LSO) with Sulfuric Acid Plant Engineering Design Construction Training & Start-up Capital Cost Studies Feasibility Studies Operations & Maintenance Peer Reviews Modernization Capacity Expansion Patents and Papers MoS2 Roasting Experience Fort Madison, IO, USA Sierrita, AR. USA Langeloth, PA. USA Washington, PA. USA Winslow, NJ, … Read more

Millerite (NiS) Serapation from Pentlandite and Chalcopyrite

While there are over 45 different nickel minerals, only a few of them are of economic importance to the minerals industry. The principal nickel mineral in nickel sulphide ores is pentlandite ((Ni,Fe)8S9) while the less common nickel sulphides include millerite (NiS). violarite (Ni2FeS4), polydymite (Ni3S4), siegenitc {(Co,Ni)3S4), and heazlewoodite (Ni3S2). As well, often present are … Read more

Smelting Flotation Concentrate

In the November issue of Teniente Topics, the monthly publication of the Braden Copper Co., Chile, a member of the staff briefly outlines the development of the smelter from 1909 to the present time. Metallurgical difficulties have been many, but were overcome, in spite of being 6000 miles from the base of supplies. The plant … Read more

Recovering Silver from Photographic Materials

The Dangers Of Nitric Acid Nitric acid can kill if swallowed! Nitric acid can be absorbed through the skin, causing nitric acid poisoning. WEAR RUBBER GLOVES! Always use nitric acid in a well-ventilated area. Do not breathe the fumes! Nitric acid can ruin your clothes and shoes. Always add nitric acid to water. Never add … Read more