In addition to gold, gold - silver ore contains tens of grams to several hundred grams of silver per ton of ore. In the primary gold-silver mine, silver is often present in the form of snail-like sulphur-silver ore, deep red-silver ore, brittle silver ore, natural silver, sulphur- bismuth- copper- silver ore; in the oxidized ore, there is a silver halide (horn silver ore). ), sulfate (silver iron ) and natural. Silver minerals are often closely associated with clay minerals, iron oxides and manganese oxide . Natural silver particles are often covered by some metal oxide and hydroxide films. Gold minerals exist in the form of natural gold and silver gold ore, and the gold particles are very fine. Because silver has many kinds of minerals, silver often appears in various states in ore. Therefore, gold-silver mining often uses two or more methods to form a combined process. For coarse gold, it is usually used for mercury recovery and re-election; for fine-grained silver and silver minerals, it can be recovered by flotation and flocculation roasting cyanidation; for silver deuteration , selenide and silver-iron bismuth minerals, it is often necessary to oxidize first. Or calcination recovery of the calcined sand after chlorination. Production index: 45 g of silver ore selected / t gold 18.80 g / t; reselection silver concentrate containing 1641.8 g / t gold 2529.5 g / t; heavy tail to the floating mineral stone containing 30.1 g silver / t with Gold 13.60 g / ton; flotation concentrate contains 1409.0 g / ton of silver, 415.0 g / ton of gold; flotation tailings containing 9.3 g / ton of silver, 1.3 g / ton of gold; cyanide ore containing silver 10.6 Gram / ton, gold 2.8 g / ton; gold mud containing 3.1%, gold 1.2%; cyanide slag containing silver 7.3 g / ton, gold containing 1.6 g / ton; comprehensive concentrate yield of 2.61%, containing silver 1415.0 g / ton, containing 676.9 g / ton of gold; comprehensive recovery rate of silver is 81.93%, gold is 93.93%. Fluid Bed Dryer is designed to introduce the hot air stream at the base of the product container which is filled with the material. Induced draught is created by means of blower and fresh air is sucked in to the unit. The fresh air is heat by means of electrical heaters or steam or thermic fluid heaters. This hot air stream expands the bed of material at certain velocity & creating turbulence in the product. The phenomenon is known as fluidisation and offer conditions which are almost ideal for drying. Fluidisation produces full agitation of solid particles and since each particle gets surrounded by hot air, heat transfer is extremely high and uniform. The product is dried fast without appreciable loss of heat. Filter bags prevent particles escaping from the dryer. Fluid Bed Dryer,Fluidized Bed Dryer,Vertical Fluid Bed Dryer,Batch Type Fluid Bed Dryer Changzhou Bole Tech Co.,Ltd , https://www.bolecoater.com
Japan’s Chitose Gold and Silver Mine is a shallow hydrothermal filling gold-silver deposit. Metal ore minerals natural gold, argentite, magenta silver, pink silver, brittle silver, silver stibnite, chalcopyrite, galena, pyrite. In addition to natural gold, gold is also accessed in the inclusion of pyrite, with gold particles ranging from 10 to 50 microns and from 100 to 150 microns. The gangue is mainly quartz , chlorite, feldspar , calcite and the like. When the mine treats the sulfide ore, it is recovered by a single flotation method; if the high-grade ore oxide is treated, the coarse-grained gold is recovered by the re-election method (slot), and the silver is recovered by flotation, and when the effect is not good, it is available. The cyanidation process recovers part of the gold and silver. The process flow is shown in the figure. 
Gold-silver ore sorting characteristics