Ancient riverbed, ancient terraces and so there is no water in the gold dredger mining inland sand gold deposit and the modern river terraces of mining different, the former first need to set topsoil stripping device and is suitable for mining equipment sand deposits, and will adopt Out of the gravel transporter factory and equipment for washing and recycling gold. The process of the Australian Mining Company (AMPL) Victoria Co., Ltd. processing the gold deposit near Avoca is shown in Figure 1. Figure 1 Flow of gold recovery from Avoca Gujin gravel The sand deposits consists mainly of quartz sand and a considerable amount of clay and brown iron ore junction edge components. Among them, a small amount of heavy minerals are only economically valuable. The gold-bearing gravel is produced by an electric shovel, loaded into a dump truck and transported to the side of the flow trough platform of the factory, and then transported the ore to the platform by the mining dump truck. The water gun (nozzle 31mm) supplied by two high-pressure water pumps in series is used to flush the ore on the platform. The washing efficiency is related to the amount of clay contained in the gravel, about 75-270 m 3 /h, usually 150 m 3 ∕h. The washed gravel was sieved through a 1.5 m × 4.2 m double-layer vibrating sieve with a sieve diameter of 38 and 6 mm, respectively, to remove coarse gravel. The undersize is passed through a cyclone to remove particulate clay and excess water. The cyclone slurry is processed through a three-stage Inverell jig to produce the final concentrate. The first-level rough-selection jigging machine surface is 1.2m×4.8m, and the jigging stroke is 19mm; the second-stage selection and third-stage final selection jigging machine surface is 0.45m×0.9m, and the jig stroke is 16mm respectively. And 9mm. The final concentrate contains about 0.5% gold and the main minerals are limonite, rutile and zircon . Mercury is mixed, distilled and then smelted into a combined gold. Gravel, grit and tailings from vibrating screens and roughing jigs for sale or filling pits. The selection and smelting methods for various types of gold deposits are not described in detail in this article. For details, please refer to some monographs on gold production. Highway Guardrail Steel Sheet Roll Forming Machine is the equipment to press, through rolling and cold bending, the colored steel sheet with thickness of 0.3-1.0 mm into two waves pattern sheet. The Highway Guardrail Roll Forming Machine is suitable for the use of highway guardrail and has the following characteristic: light weight, high strength, rich colors and being earthquake-proof and fireproof, etc. Now the machine is widely used. It has advantage of pretty appearance, durable using ,long life ,low energy consumption and so on. Highway Guardrail Roll Forming Machine Highway Guardrail Roll Forming Machine,Guardrail Roll Forming Machine,Guardrail Machine,Guardrail Forming Machine Botou Hongyuan Forming Machine Co.,Ltd , https://www.tilemakingmachinery.com