Electrolytic silver extracting machine

Abstract

The invention discloses an electrolytic silver extracting machine. The electrolytic silver extracting machine comprises a machine box, wherein a silver extracting unit with the lower end extended into the machine case is inserted into the upper surface of the machine box; the silver extracting unit comprises a silver extracting unit main body, a cathode tube, an anode bar, a sealing cover, a water inlet, a water outlet, a water outlet tube, a water inlet tube and a water drawing pump; the silver extracting unit main body is inserted into the upper surface of the machine box; the lower end of the silver extracting unit main body is extended into the machine box; the cathode tube is inserted into the silver extracting unit main body; the anode bar is inserted into the cathode tube and is conductively connected with the cathode tube; the sealing cover is arranged at an opening of the upper end of the silver extracting unit main body; the water inlet and the water outlet are formed in the side surfaces of the machine box respectively; one end of the water outlet tube is abutted with the water inlet, and the other end of the water outlet tube is communicated with the inside of the cathode tube; one end of the water inlet tube is abutted with the water outlet, and the other end of the water inlet tube is communicated with the inside of the cathode tube; the water drawing pump is arranged inside the machine box and is communicated with the water inlet tube; the cathode tube is a stainless tube or a titanium metal tube; the anode bar is a graphite bar, a stainless steel bar or a titanium coating bar. The electrolytic silver extracting machine has the advantages of simple structure and high practicability.

Description

technical field [0001] The invention relates to the improvement of a device for directly electrolytically extracting silver from silver ore leachate, in particular to an electrolytic silver extractor. Background technique [0002] Since the low-grade silver ore heap leaching technology came out in the United States in the early 1970s, it has become one of the main means of silver production in the world. Since the 1980s, my country began to study and gradually popularized and applied it. The scale of heap leaching has grown from 1,000 tons to 100,000 tons. The development and application of heap leaching technology has played a huge role in promoting the development and utilization of low-grade silver ore resources in my country. However, until now, in the production of silver heap leaching, two sets of independent devices are mainly used to absorb activated carbon in the adsorption tower and to desorb the silver-loaded carbon in the desorption tower. The silver-containing ...

AI Technical Summary

Problems solved by technology

According to the adsorption principle of activated carbon, it is known that the carbon surface (especially at the edges and corners) has the largest adsorption amount of silver, and when squeezed and rubbed, the carbon surface and edges and corners are most likely to be pulverized, which not only reduces the adsorption of activated carbon Activity and service life, and in the desorption process, these secondary carbon powders have flowed into the electrolytic cell with the solution before they are well desorbed, which not only causes unnecessary loss of silver, but also pollutes the electrolyte and affects the electrolysis effect. Electrolysis will stop due to short circuit of electrodes caused by too much carbon powder

[0004] In order to eliminate the influence of carbon powder and recycle carbon powder to reduce the loss of silver, some mines have added a screening and cleaning process before desorption. Most of the cleaned carbon powder can be recovered after sedimentation and filtration, but there are still some fine floating carbon. It is difficult to fully recover the powder, and at the same time, the production cost is increased due to the addition of a process

[0005] (2) Because the silver-loaded carbon is transported to the desorption workshop and can be returned to use after desorption, while the heap leaching and adsorption in the mine is carried out continuously, which forces the mine to prepare a large amount of activated carbon for turnover

In some mines, because there is no desorption workshop, the silver-loaded carbon must be entrusted with external processing for desorption, and the return time of the carbon will be longer. Even in that year, there was no silver-removed carbon that could be returned to use. A heap leaching mine with an annual processing capacity of 10,000 tons of ore is generally It is necessary to prepare 5 tons of activated carbon, and there is a backlog of production capital, which seriously increases the input of production capital.

[0006] (3) Since the silver-loaded carbon cannot be desorbed in time, the silver produced in the mine cannot be converted into cash in time, so that the capital and silver turnover during the production period is slow

For those mines that entrust external processing and desorption, the silver produced in the year is often turned into cash silver at the end of the production, which leads to the fact that all the capital needed during the production period depends on the mines to raise cash to maintain production and liquidity. Very low silver turnover

[0007] (4) The discharge of poor electrolytic solution is always a difficult problem for desorption electrolysis plants

[0008] (5) Entrusting external processing and desorption will cause another damage and pulverization loss when the silver-loaded carbon is mixed and sampled, and often there are differences and disputes in the determination of the grade and moisture of the silver-loaded carbon. A headache that takes time, energy, and money

At the same time, the processing cost is not a small amount for the entrusting party, generally accounting for 15-20% of the direct production cost

[0009] (6) The current desorption electrolysis process is carried out under normal pressure, so it can only be used in mines in low altitude areas

Although my country has already developed high-pressure desorption equipment, it is difficult for ordinary heap leaching mines to bear due to the high price.

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