Some gold extraction from gold, some gold from the veins. Since the 1970s pulse remained at 75% of gold production to 85%, gold 15% to 25%.
First, sand gold beneficiation methods used
Native gold deposits exposed surface, due to mechanical and chemical weathering, making the gold prospecting equipment or gold-bearing rock gradually broken into and gold particles and otherdebris. Then, in the role of external handling and sorting role, so that a large proportion ofminerals (such as gold particles) deposited on the slopes, river, lake shore coastal areas, a certain concentration, which has a value of industrial exploitation of those who, on the calledplacer deposits.
Placer gold deposits usually ships mining, hydraulic mining excavators and underground mining(shaft) exploitation. Placer gold deposits in China's ship-based exploration, mining and hydraulicexcavators are also mined.
Second, vein gold ore processing methods used
Gold ores due to the nature of different types, using different methods of dressing, but the commonly used rock gold mine selection machines, choose gold equipment, gold beneficiation process re-elected, flotation, amalgamation, cyanidation, and in recent years to the resin slurrymethod, CIP adsorption, a new heap leaching gold stamp mill process. For certain types of ore,gold extraction process is often a joint.
First, the extraction of copper from copper ore in the method
For low-grade copper ore, need to go through dressing, so that a copper concentrate gradeenrichment (issued in 1976 by ??the Ministry of Metallurgical Industry standard requires coppe rconcentrate grade of 8 to 28% of copper ore crusher in practice grade is generally 10 to 20%,30% to individual persons), then into ice-copper concentrate smelting (copper sulfide and iron sulfide alloy, copper grade is generally 30 ~ 45%), ice and blowing through a copper blister copper (copper grade of 97 ~ 99%), blister, or go through fire refining and electrolytic refining to be refined (copper grade of 99.9%). A small amount of rich copper ore (copper generally greater than 5%) can be used without dressing, and mixed directly into the furnace with the smelting ofcopper concentrate.
Second, the copper ore copper ore beneficiation methods and quality requirements for
The main copper ore beneficiation flotation method, and some with the use of magnetic separation, gravity separation or wet smelting.
For the correct selection of a variety of mineral processing methods, to study the copper orecomponents and structure of the material structure; to identify the type of copper ore, natural and industrial types; but also understand the refractory ores and mineral content of the general distribution and so on.