Ferric Chloride Thiourea and Brine Leaching to Extract Ag-Au

leach-solution electrolytic cell

Independent mine operators have difficulty marketing complex gold-silver concentrates and ores. Generally, complex sulfide concentrates and ores cannot be handled by existing smelters. Even when handling them is technically possible, smelter charges and transportation costs become limiting factors. Hydrometallurgical methods are seriously being considered to provide a simple, inexpensive, low-pollution process to treat complex gold-silver […]

Sulfation Leaching Treatment ilmenite Concentrate Titanium Slags

chlorination continuous slag sulfation reactor

The United States depends upon imports to supply most of the rutile and up to 70 pct of the ilmenite and titanium slag requirements for the manufacture of TiO2 pigments, titanium metal, and welding rod coatings. To help assure an adequate supply of titanium raw materials to meet national economic and strategic needs, the Bureau […]

How to Size & Design a Regrind Ball Mill

how to design a regrind ball mill

 Regrind Ball Mill F = 210 micrometers. P = 45 micrometers. Wi = 14.0 W = 10 x 14.0/√45 – 10 x 14.0/√210 = 11.21 kwh/s. ton Efficiency Factors: EF1 does not apply. EF2 Many regrind operations are closed circuit, but assume this one is open circuit and 80 percent passing grind will be […]

Pebble Mill Design Calculations – HOW TO

Pebble Mill Design Calculations - HOW TO - 911Metallurgist

 Pebble Mill: Rod Mill Pebble Mill Circuit The calculation for determining grinding power for Pebble milling (secondary autogenous) can be the same as for ball milling from rod mill product size to the desired specified size, neglecting the diameter efficiency factor if less than 1.0. 5.47 x 1.102 x 1.341 x 500 = 4039 […]

How to Produce Pure Lead from Galena Concentrates

hydrometallurgical-process flow diagram

A major cost factor in the sintering and smelting process for producing Pb is the control needed to meet existing environmental standards for Pb emissions. Another issue is the current concern over acid rain, which will in all probability result in even more stringent controls on emission of S gases. The method consists of (1) […]

How to Recover Nickel Cobalt Scrap

superalloy-scrap electrolytic cell

We are developing improved technology to increase the recycling of mixed contaminated Cr-Co-Ni-bearing scrap and waste materials. According to a study of critical metals availability approximately 125 million lb/yr of mixed contaminated superalloy and associated heat- and corrosion-resistant high-alloy scrap is downgraded or exported. Even though Co usage has dropped in recent years, appreciable amounts […]

Ceramic Corrosion Resistance to Sulfuric Acid

corrosion resistance construction detail of reaction vessel

Extensive literature, published during recent years, identifies three general methods of fine-particle preparation: (1) solution techniques, (2) vapor-phase techniques, and (3) salt decomposition techniques. Solution techniques, also referred to as “chemical” preparation, offer the advantages of ease of preparation, good control of composition, and homogeneity. Among the solution techniques a number of terms, such as […]