System for preventing and controlling blockage of desorption electrodeposition system

Abstract

The utility model relates to a system for preventing and controlling blockage of a desorption electrodeposition system, which comprises the desorption electrodeposition system, a pretreatment system is arranged at the front end of the desorption electrodeposition system, and a pickling system is connected to the rear end of the desorption electrodeposition system; the pretreatment system comprises a carbon storage tank, the top of the carbon storage tank is provided with a carbon inlet pipe, one side of the top is connected with an overflow pipe, and the bottom is connected with a vibrating screen; a filter residue groove is formed in the outlet end of the overflow pipe, an oversize outlet of the vibrating screen is connected to a lower carbon hopper with a screen mesh, and the lower carbon hopper with the screen mesh is connected with a carbon storage tank; the bottom of the carbon storage tank is connected with a feeding hole of the desorption column; the bottom of the desorption column is connected with a feeding hole of the pickling tank; ultrasonic probes I are arranged in the carbon storage tank and the pickling tank, and an ultrasonic probe II is arranged in the desorption column. According to the system, through the gold-loaded carbon pretreatment system and the three-section ultrasonic equipment, gold-loaded carbon in the front stage, the middle stage and the rear stage of desorption can be effectively cleaned, the problem of blockage of a desorption electrodeposition system is solved, the equipment replacement frequency of the desorption electrodeposition system is reduced, and the gold and silver desorption effect and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to metallurgical technical field, concretely relates to a system for preventing and controlling desorption electric accumulation system blockage. BACKGROUND

[0002] Before full mud cyanidation leaching, the original ore that has experienced crushing and fine grinding often carries wood chips, detonator skin, plastic fragments and other sundries, these sundries are easy to block the pipeline and screen, especially wood chips can also adsorb gold. Therefore, the sundries must be removed before cyanidation leaching, generally, the sundries is removed by two-stage closed-circuit grinding classification overflow, and the wood chips are generally removed by using medium-frequency linear vibrating screen, spiral screen or cylindrical screen. However, after the treatment, part of the wood chips, detonator skin, plastic fragments and other sundries still flow to the cyanide carbon slurry system, and finally are lifted to the desorption electric accumulation workshop by the carbon lifting vibrating screen in the cyanidation section. Under the high temperature and high pressure desorption electric accumulation working condition, the wood chips, detonator skin, plastic fragments and other sundries are easy to form molten and congealed materials, causing the pipeline and screen of the desorption electric accumulation system to be blocked (such as the liquid inlet pipe, liquid outlet pipe, blowdown pipe screen and filter core screen of the desorption column), which must be frequently disassembled and replaced, not only increasing the labor, but also affecting the effect and efficiency of the desorption electric accumulation.

[0003] Especially with the continuous development of mineral resources, the middle-deep and difficult-to-treat oxygen-sulfur mixed ore and laterite ore gradually become the main mineral resources, and these difficult-to-treat gold ore resources are associated with silver, iron, copper, lead, zinc, calcium, sulfur and other elements, and have heavy argillaceous. In the process of cyanide carbon slurry gold extraction, impurity elements will react with cyanide to form related cyanide complexes and be adsorbed on activated carbon, thereby generating complex and difficult-to-treat gold-loaded carbon with high impurity elements and heavy argillaceous. In order to fully recover this kind of gold ore resources, the amount of lime is often increased in the ball milling and cyanidation leaching process, which also leads to the increase of calcium in the whole system process, and part of the calcium ions will be adsorbed on the activated carbon in the form of calcium sulfate, calcium sulfite, calcium carbonate and calcium hydroxide.

[0004] When this kind of gold-loaded carbon enters the desorption electric accumulation system, it will inevitably aggravate the blockage. In addition to the blockage caused by wood chips, plastic fragments, detonator skin and sludge, different forms of calcium compounds will also form dense calcium sulfate and calcium sulfite scale (xCaSO3·yCaSO4·2H2O) attached to the inner wall, screen and pipeline of the desorption electric accumulation system equipment during the high temperature and high pressure desorption electric accumulation process, resulting in low flow and high pressure of the whole desorption electric accumulation system, affecting the desorption electric accumulation effect and reducing the gold and silver desorption electric accumulation rate. Through statistics, it is found that under such working conditions, the desorption column liquid outlet pipe screen must be disassembled and replaced once for 2-3 desorption columns, the desorption column liquid inlet pipe screen, blowdown pipe and filter core screen must be disassembled and replaced once for 5-6 desorption columns, and the desorption electric accumulation pipeline must be disassembled and cleaned once for 15-20 desorption columns, greatly increasing the labor and seriously affecting the operation efficiency of the desorption electric accumulation. SUMMARY

[0005] In order to solve the above problems, the utility model provides a kind of method and system for preventing and controlling desorption electric accumulation system block, prevent and control in front, middle, after three stages of desorption electric accumulation, improve desorption electric accumulation effect and efficiency.

[0006] To achieve the above object, the utility model provides a kind of method for preventing and controlling desorption electric accumulation system block, comprising the following steps:

[0007] (1) desorption electric accumulation before gold carrier pretreatment: the gold carrier of cyanide carbon slurry operation is transported to pretreatment system, and rinsing is carried out by the joint action of ultrasonic wave and airflow, and vibration screen is cleaned and sieved, and the impurities doped in gold carrier and the argillaceous in surface and pore are removed;

[0008] (2) desorption electric accumulation removes calcium compound: after pretreatment, gold carrier is transported to desorption column of desorption electric accumulation system, and water on the surface of gold carrier is blown dry by air into desorption column, and after water is blown dry, "sodium hydroxide+ sodium cyanide+ sodium tripolyphosphate+ sodium carbonate" desorption liquid is added to desorption column for desorption, and in the process of desorption, ultrasonic probe arranged in desorption column is started, under the mechanical action of high temperature and high pressure and ultrasonic wave, metal ion, impurity and calcium compound adsorbed on gold carrier are accelerated to desorb, and desorption liquid reacts with calcium compound to form soluble calcium phosphate salt complex Na [Na2Ca (P3O10)], so that dense calcium sulfate, calcium sulfite scale is avoided to adhere to the equipment of desorption electric accumulation system;

[0009] Its reaction process and equation are as follows:

[0010] 1) sodium carbonate ( ) reacts with calcium sulfate ( ), calcium sulfite ( ) to form calcium carbonate ( ) precipitate;2) sodium tripolyphosphate ( ) reacts with calcium ion ( ) to form soluble calcium phosphate salt complex ; the initial product of reaction is mainly precipitate, with the increase of sodium tripolyphosphate, gradually appears, and the final reaction product is soluble calcium phosphate salt complex , this reaction can reduce the hardness of solution, purify and soften the water quality of liquid; reaction equation is as follows:

[0011]

[0012]

[0013]

[0014] (3) After desorption electro-accumulation, the gold-removed carbon is transported to the pickling system, and through the corrosion-resistant ultrasonic probe installed in the pickling tank and the gas flow, the gold-removed carbon is fully rolled in the pickling tank, fully contacts with the acid solution, and further removes the residual calcium in the pores of the gold-removed carbon under the ultrasonic cavitation effect, so that the gold-removed carbon is fully pickled and regenerated.

[0015] To achieve the above object, the utility model further provides a system for preventing and controlling the blockage of the desorption electro-accumulation system, which comprises a desorption electro-accumulation system, a pretreatment system arranged at the front end of the desorption electro-accumulation system, and a pickling system connected to the rear end of the desorption electro-accumulation system.

[0016] Further, the ultrasonic probe two comprises a shell, a first-stage amplitude lever and a second-stage amplitude lever connected to the shell in sequence, and an ultrasonic tool head connected below the second-stage amplitude lever.

[0017] Further, the ultrasonic probe one comprises a shell, a first-stage amplitude lever and a second-stage amplitude lever connected to the shell in sequence, and an ultrasonic tool head connected below the second-stage amplitude lever, wherein an amplitude lever shell is sleeved outside the ultrasonic tool head, the top of the amplitude lever shell is connected to the second-stage amplitude lever, a plurality of air inlets are formed in the side wall of the second-stage amplitude lever, the air inlets lead to the inner cavity of the amplitude lever shell from the side wall of the second-stage amplitude lever, air inlet pipes are connected to the air inlets, and a plurality of air outlets are formed in the circumferential wall of the amplitude lever shell.

[0018] Further, the residue filter tank is funnel-shaped, and a screen is arranged on the upper part of the funnel.

[0019] Further, a sewage pipe is arranged below the side of the carbon storage tank and the carbon storage tank, a screen is arranged at the outlet of the sewage pipe, and a valve is arranged on the pipe.

[0020] Further, a valve is arranged on the conveying pipe connected to the bottom of the carbon storage tank, the screen meshed carbon hopper and the carbon storage tank.

[0021] Further, the first-stage amplitude lever and the second-stage amplitude lever are connected through flanges.

[0022] The utility model discloses a beneficial effect: the utility model discloses through gold -loaded carbon pretreatment system and three section ultrasonic equipment, can carry out effective cleaning to gold -loaded carbon of three stages before desorption, in desorption, after desorption, fully removes the impurity of doped in gold -loaded carbon and the argillaceous and calcification compound adsorbed in surface and pore, very good solution desorption electric accumulation system block -up problem, not only reduces the replacement frequency of desorption electric accumulation system equipment, reduces the labor amount, and the desorption effect and efficiency of gold, silver are improved greatly. In addition, also promote the pickling regeneration ability of gold -free carbon, has good economic benefit. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a flow chart for example 1 a kind of method for preventing and controlling desorption electric accumulation system block -up;

[0024] Figure 2 It is the equipment correlation diagram for example 2 a kind of method for preventing and controlling desorption electric accumulation system block -up;

[0025] Figure 3 It is Figure 2 The structure diagram of second ultrasonic probe in it;

[0026] Figure 4 It is Figure 2 The structure diagram of first ultrasonic probe in it;

[0027] In the figure: 1-preprocessing system, 11-stores carbon tank, 12-into carbon pipe, 13-overflow pipe, 14-filter residue tank, 15-vibrating screen, 16-take screen under carbon hopper, 17-stores carbon tank;2-desorption electric accumulation system, 21-desorption column, 22-liquid preparation tank, 23-circulating pump, 24-electric heater, 25-filter, 26-electrolytic tank 26;3-pickling system, 31-pickling tank, 32-acid preparation tank;4-first ultrasonic probe, 41-outer shell, 42-primary amplitude rod, 43-air inlet, 44-secondary amplitude rod, 45-ultrasonic tool head, 46-amplitude rod outer shell, 47-air outlet;5-air inlet pipe;6-second ultrasonic probe. DETAILED DESCRIPTION

[0028] In order to make the technical problem, technical scheme solved by the utility model more clearly, the following is combined with the embodiment, and the utility model is further explained in detail.It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model. Example 1

[0029] As Figure 1 Indicated, the embodiment provides a kind of method for preventing and controlling desorption electric accumulation system block -up, including the following steps:

[0030] (1) Desorption electric accumulation of preloaded activated carbon pretreatment: the cyanide carbon slurry operation of gold-loaded carbon is transported to the pretreatment system, rinsed by ultrasonic wave and air flow, cleaned and sieved by vibrating screen, and the impurities doped in the gold-loaded carbon and the mud on the surface and in the pores are removed;

[0031] (2) Desorption of calcium compounds: the pretreated gold-loaded carbon is transported to the desorption column of the desorption electric accumulation system, the water on the surface of the gold-loaded carbon is blown dry by air, and after the water is blown dry, the high-temperature heated "sodium hydroxide + sodium cyanide + sodium tripolyphosphate + sodium carbonate" desorption liquid is added to the desorption column for desorption. In the desorption process, the ultrasonic probe arranged in the desorption column is started, under the action of high temperature, high pressure and ultrasonic wave, the metal ions, impurities and calcium compounds adsorbed on the gold-loaded carbon are accelerated to desorb, at the same time, the desorption liquid reacts with the calcium compounds to modify them into soluble calcium phosphate salt complex Na[Na2Ca(P3O10)], so as to avoid the calcium compounds forming dense calcium sulfate and calcium sulfite scale attached to the equipment of the desorption electric accumulation system;

[0032] The reaction process and equation are as follows:

[0033] 1) Sodium carbonate ( ) reacts with calcium sulfate ( ), calcium sulfite ( ) to form calcium carbonate ( ) precipitate; 2) sodium tripolyphosphate ( ) reacts with calcium ions ( ) to form soluble calcium phosphate salt complex ; the initial product of the reaction is mainly precipitate, with the increase of the amount of sodium tripolyphosphate, gradually appears, and the final reaction product is soluble calcium phosphate salt complex . This reaction can reduce the hardness of the solution, purify and soften the water quality of the liquid; the reaction equation is as follows:

[0034]

[0035]

[0036]

[0037] The desorption solution of the original "sodium hydroxide + sodium cyanide" or "sodium hydroxide + sodium cyanide + sodium carbonate" is optimized to "sodium hydroxide + sodium cyanide + sodium tripolyphosphate + sodium carbonate" in the process. When using "sodium hydroxide + sodium cyanide" desorption solution, without sodium carbonate, the calcium ions adsorbed on the carbon will form dense calcium sulfate and adhere to the inner wall of the screen or pipeline, causing blockage; after adding sodium carbonate, the calcium sulfate is modified to form calcium carbonate precipitate, although the calcium carbonate precipitate is not as dense as the calcium sulfate scale, but the calcium carbonate will also form relatively loose calcium carbonate precipitate adhering to the inner wall of the screen or pipeline, which will also cause some blockage. After the desorption solution is optimized to "sodium hydroxide + sodium cyanide + sodium tripolyphosphate + sodium carbonate", the sodium tripolyphosphate as a high-efficiency dispersant, under the action of high temperature, high pressure and ultrasonic wave intensification, the calcium sulfate is completely modified to soluble calcium phosphate salt complex , fundamentally solving the problem of blockage.

[0038] (3) After desorption and electric accumulation, the gold-removed carbon is transported to the pickling system, and through the corrosion-resistant ultrasonic probe installed in the acid washing tank and the gas flow introduced, the gold-removed carbon is fully tumbled in the acid washing tank under the action of ultrasonic waves, fully contacts with the acid solution, and further removes the residual calcium in the pores of the gold-removed carbon under the action of ultrasonic cavitation, so that the gold-removed carbon is fully pickled and regenerated.

[0039] It should be noted that the above steps only describe the removal steps of the impurities and calcium compounds adsorbed on the surface and in the pores of the gold-loaded carbon in the three stages of desorption, and the specific process of desorption and electric accumulation and pickling belongs to the prior art and will not be described here. Example 2

[0040] As Figure 2 shown, the present embodiment provides a system for preventing and controlling the blockage of a desorption and electric accumulation system, which comprises a desorption and electric accumulation system 2, a gold-loaded carbon pretreatment system 1 arranged at the front end of the desorption and electric accumulation system 2, and a pickling system 3 connected to the rear end of the desorption and electric accumulation system 2.

[0041] The pretreatment system 1 comprises a carbon storage tank 11, an inlet pipe 12 arranged at the top of the carbon storage tank 11, an overflow pipe 13 connected to one side of the top of the carbon storage tank 11, a residue filter tank 14 arranged at the outlet end of the overflow pipe 13, the residue filter tank 14 being in the shape of a funnel, a sieve screen arranged at the upper part of the funnel, a vibrating screen 15 connected to the bottom of the carbon storage tank 11 through a conveying pipe, a sieve screen lower carbon hopper 16 connected to the outlet of the vibrating screen 15, a carbon storage tank 17 connected to the vibrating screen lower carbon hopper 16 through a conveying pipe, and valves arranged on the conveying pipes connected to the bottoms of the carbon storage tank 11, the vibrating screen lower carbon hopper 16 and the carbon storage tank 17, respectively, sewage pipes arranged below the carbon storage tank 11 and the carbon storage tank 17, respectively, sieve screens arranged at the flower pipes of the sewage pipes, and valves arranged on the pipes.

[0042] The desorption electrowinning system 2 includes a desorption column 21 and other existing desorption electrowinning equipment, such as a liquid preparation tank 22, a circulation pump 23, an electric heater 24, a filter 25, an electrolytic cell 26, etc.

[0043] The pickling system 3 includes pickling tank 31 and other existing supporting equipment, such as pickling tank 32, conveying pipelines and conveying pumps.

[0044] The bottom of the carbon storage tank 17 is connected to the feed inlet of the desorption column 21 via a conveying pipe and a conveying pump; the bottom of the desorption column 21 is connected to the feed inlet of the pickling tank 31 via a conveying pipe and a conveying pump.

[0045] Both the carbon storage tank 11 and the pickling tank 31 are equipped with ultrasonic probe 4, and the desorption column 21 is equipped with ultrasonic probe 6.

[0046] As a preferred option, such as Figure 3 As shown, the ultrasonic probe 6 includes a housing 41 and a primary amplitude transformer 42 and a secondary amplitude transformer 44 connected thereto in sequence. The primary amplitude transformer 42 and the secondary amplitude transformer 44 are connected by a flange, and an ultrasonic tool head 45 is connected below the secondary amplitude transformer 44.

[0047] When the ultrasonic probe 26 is working, the first-stage amplitude transformer 42 and the second-stage amplitude transformer 44 begin to vibrate, thereby driving the ultrasonic tool head 45 to vibrate, generating mechanical vibration and cavitation. The mechanical vibration can cause the gold-loaded carbon in the same space to turn over, while the cavitation can penetrate into the pores of the gold-loaded carbon, causing impurities in the pores to be shaken off and peeled off.

[0048] As a preferred option, such as Figure 4 As shown, the ultrasonic probe 4 includes a housing 41 and a primary amplitude transformer 42 and a secondary amplitude transformer 44 connected thereto in sequence. The primary amplitude transformer 42 and the secondary amplitude transformer 44 are connected by a flange. An ultrasonic tool head 45 is connected below the secondary amplitude transformer 44. An amplitude transformer housing 46 is fitted over the ultrasonic tool head 45. The top of the amplitude transformer housing 46 is connected to the secondary amplitude transformer 44. Multiple air inlets 43 are opened on the side wall of the secondary amplitude transformer 44. The air inlets 43 lead from the side wall of the secondary amplitude transformer 44 to the inner cavity of the amplitude transformer housing 46. An air inlet pipe 5 is connected to the air inlet 43. Several air outlets 47 are opened on the circumferential wall of the amplitude transformer housing 46.

[0049] Compared to ultrasonic probe 6, ultrasonic probe 1-4 has an added air inlet 43 and an air outlet 47. While ultrasonic probe 1-4 is working, gas is introduced into the air inlet pipe 5. The gas enters the inner cavity of the amplitude transformer housing 46 along the air inlet 43. As the ultrasonic tool head 45 vibrates, the gas is ejected from the air outlet 47 and acts on the gold-loaded carbon to further enhance the stirring effect.

[0050] Working principle: the carbon slurry operation of cyanide is transported to the carbon storage tank 11 by water power, the ultrasonic probe one 4 is opened, and the gas flow is introduced into the air inlet pipe 5 at the same time, the carbon carrying gold is in the "tumbling" state under the action of ultrasonic mechanical action and gas flow, and under the synergistic action of ultrasonic cavitation, the dirt in the pores of the carbon carrying gold is also fully eluted, so that the impurities such as wood chips, plastic fragments, primer, surface sludge and internal pore dirt in the carbon carrying gold are fully separated from the carbon carrying gold, and finally the light impurities such as wood chips, plastic fragments and primer are discharged through the overflow pipe 13 and accumulated on the screen of the filter residue tank 14; the heavy blocky impurities, the eluted dirt and the carbon carrying gold are deposited in the lower part of the carbon storage tank 11, and then transported to the vibrating screen 15 for cleaning and screening after rinsing, and the dirt in the carbon carrying gold is removed. Then the heavy blocky material is retained on the screen by the carbon hopper 16 with screen, and the clean carbon carrying gold smoothly enters the carbon storage tank 17.

[0051] Then the clean carbon carrying gold in the carbon storage tank 17 is transferred to the desorption column 21 by the delivery pump, the gas is first introduced into the desorption column 21 to dry the water on the surface of the carbon carrying gold, and then the circulating pump 23 delivers the prepared "sodium hydroxide + sodium cyanide + sodium tripolyphosphate + sodium carbonate" desorption solution in the solution tank 22 to the electric heater 24 for high temperature heating, and then supplies the desorption column 21 for desorption after heating, at this time, the ultrasonic probe two 6 is started, under the action of high temperature, high pressure and ultrasonic wave, the metal ions, impurities and calcium compounds adsorbed on the carbon carrying gold are accelerated to desorb, the desorption reaction is promoted, and the desorption solution reacts with the calcium compounds to form soluble calcium phosphate salt complex Na[Na2Ca(P3O10)], which avoids the formation of dense calcium sulfate and calcium sulfite scale attached to the desorption and electrodeposition system equipment. The gold-removed carbon (lean carbon) after desorption is deposited at the bottom of the desorption column 21, and the noble liquid is filtered by the filter 25 after the impurities and carbon powder, and then transferred to the electrolytic tank 26 for electrodeposition.

[0052] The gold-removed carbon (lean carbon) deposited at the bottom of the desorption column 21 is delivered to the pickling tank 31 by the delivery pump, the ultrasonic probe one 4 is started, and the gas flow is introduced into the air inlet pipe 5 at the same time, the gold-removed carbon is fully tumbled in the pickling tank 31 under the action of ultrasonic mechanical action and gas flow, and fully contacts with the acid solution supplied by the acid tank, which can avoid the phenomenon of "channeling" or "dead zone" and "hardening" of the acid washing liquid in the activated carbon bed of the pickling tank 31; at the same time, the calcium in the pores of the gold-removed carbon is further removed under the action of ultrasonic cavitation, so that the gold-removed carbon is fully pickled and regenerated.

[0053] It should be noted that the present embodiment only describes the equipment related to the removal of adsorbed impurities and calcium compounds on the surface and in the pores of the carbon carrying gold in the three stages of desorption, and other supporting equipment of the desorption and electrodeposition system and the pickling system belongs to the existing equipment, which will not be described here.

[0054] Application example 1

[0055] A certain iron polymetallic gold mine in China, the ore resources of the mine are mainly middle-deep difficult to handle oxygen-sulfur mixed type ore and laterite type ore, gold ore resources are associated with silver, iron, copper, lead, zinc, calcium, sulfur and other elements and contain heavy argillaceous. With the desorption workshop of the mine treating 5t of gold-loaded carbon per day as an example, the method described in Example 1 and the system described in Example 2 are applied to treat the gold-loaded carbon before, during and after desorption to improve the cleanliness of the gold-loaded carbon to prevent and control the plugging of the desorption electric accumulation system.

[0056] The production data comparison before and after the implementation is shown in Table 1:

[0057] Table 1 Details of production data before and after implementation

[0058]

[0059] Note: The ore samples before and after the implementation belong to the same batch, but due to the differences in the ore samples themselves, the metal element content in the same batch of ore samples will not be completely consistent, so there are differences in the content of gold, silver, calcium and other metal elements in the gold-loaded carbon before and after the implementation. The effect of the present application is mainly reflected in the comparison of the metal element content in the lean carbon and the gold-loaded carbon.

[0060] From Table 1, it can be seen that through the effective control of plugging prevention in the three key periods of before desorption, during desorption and after desorption, supplemented by three-stage ultrasonic wave cooperation and desorption reagent optimization, the frequency of replacing the screen of the desorption electric accumulation system is reduced from 1 time / 1 day before implementation to 1 time / 20 days, and the frequency of cleaning the pipeline of the system is reduced from 1 time / 1 day before implementation to 1 time / 30 days, greatly reducing the replacement frequency. At the same time, with the improvement of the overall smoothness of the desorption electric accumulation system, the desorption rate of gold and silver has also been greatly improved, the desorption rate of gold is increased from 83.95% before implementation to 94.60%, an increase of 10.66 percentage points, and the desorption rate of silver is increased from 95.24% before implementation to 98.44%, an increase of 3.20 percentage points. In addition, under the synergistic effect of ultrasonic waves, the acid pickling removal rate of calcium is increased from 78.89% before implementation to 91.94%, an increase of 13.05 percentage points.

[0061] Application Example 2

[0062] A certain iron polymetallic gold mine in China, the ore resource properties of the mine are complex, associated with silver, iron, copper, lead, zinc, calcium, sulfur and other elements and with heavy argillaceous. The mine will entrust the sulfur concentrate produced by flotation to be roasted, the roasted slag is washed with water, and the gold is extracted by cyanidation process. Due to the complex nature of the ore itself, the sulfur concentrate obtained by flotation also contains gold, silver, sulfur, iron, copper, lead, zinc and other multi-metal elements. After roasting, washing and cyanidation of gold and silver, the gold-loaded carbon still contains multiple impurity elements, the composition is complex, and the complex low-gold difficult-to-desorb gold-loaded carbon is formed. During the desorption and electrodeposition process of this kind of gold-loaded carbon, after the impurity elements such as calcium and magnesium are precipitated, dense calcium sulfate, calcium sulfite, magnesium sulfate and other scaling substances will be formed and attached to the inner wall of the desorption and electrodeposition system equipment, screen mesh and pipeline, which will cause frequent blockage of the desorption and electrodeposition system and cause abnormal shutdown. In addition, since the sulfur concentrate is processed by external roasting, the sulfur concentrate is transported from the mine to the company that entrusts the roasting for roasting. During this process, the management of the sulfur concentrate is relatively extensive, and the site where the sulfur concentrate is stacked is usually temporarily covered with plastic cloth, which causes a lot of plastic fragments and other impurities to mix in, and eventually enters the cyanide gold extraction process, causing serious blockage of the entire system.

[0063] Taking the desorption workshop of 10 tons of gold-loaded carbon per day of the above-mentioned sulfur concentrate as an example, the method described in Example 1 and the system described in Example 2 are used to treat the gold-loaded carbon before, during and after desorption, in order to improve the cleanliness of the gold-loaded carbon and achieve the purpose of preventing and controlling the blockage of the desorption and electrodeposition system.

[0064] The production data comparison before and after the implementation is shown in Table 2:

[0065] Table 2 Details of production data before and after implementation

[0066]

[0067] Note: The ore samples before and after the implementation belong to the same batch, but due to the differences in the ore samples themselves, the metal element content of the same batch of ore samples will not be completely consistent, so there are differences in the content of gold, silver, calcium and other metal elements in the gold-loaded carbon before and after the implementation. The effect of the present application is mainly reflected by the comparison of the metal element content in the lean carbon and the gold-loaded carbon.

[0068] As can be seen from Table 2, by implementing effective control of anti-blocking in three key periods of pre-desorption, desorption and post-desorption, and supplemented by three-stage ultrasonic wave cooperation and desorption reagent optimization, the frequency of disassembling and replacing the screen of the desorption electrode deposition system is reduced from 1 time / 1 day before implementation to 1 time / 18 days, and the frequency of pipeline cleaning of the system is reduced from 1 time / 1 day before implementation to 1 time / 25 days, thereby reducing the workload of employees. At the same time, with the improvement of the overall smoothness of the desorption electrode deposition system, the desorption rates of gold and silver are also greatly improved. The desorption rate of gold is increased from 64.80% before implementation to 90.45%, an increase of 25.65 percentage points, and the desorption rate of silver is increased from 85.86% before implementation to 96.87%, an increase of 11.01 percentage points. In addition, under the cooperation of ultrasonic waves, the pickling removal rate of calcium is increased from 84.89% before implementation to 93.55%, an increase of 8.66 percentage points.

[0069] In summary, the utility model can effectively clean the gold-loaded carbon in three stages of pre-desorption, desorption and post-desorption by three-stage ultrasonic wave and desorption reagent optimization, fully remove the impurities doped in the gold-loaded carbon and the mud and calcium compounds adsorbed in the surface and pores, and well solve the problem of blockage of the desorption electrode deposition system. Not only is the replacement frequency of the desorption electrode deposition system equipment reduced and the labor amount reduced, but also the desorption effect and efficiency of gold and silver are greatly improved. In addition, the pickling regeneration capacity of the gold-removed carbon is also improved, and good economic benefits are obtained.

[0070] The utility model is described in detail above through specific and preferred embodiments, but those skilled in the art should understand that the utility model is not limited to the above-mentioned embodiments, and any modification, equivalent replacement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A system for preventing control of clogging of a desorption electrode system, comprising a desorption electrode system (2), characterized in that: The desorption electric accumulation system (2) is provided with a pretreatment system (1) in front end, and is connected with an acid washing system (3) in rear end; The pretreatment system (1) comprises a carbon storage tank (11), the top of the carbon storage tank (11) is provided with a carbon inlet pipe (12), one side of the top of the carbon storage tank (11) is connected with an overflow pipe (13), the outlet end of the overflow pipe (13) is provided with a residue filter tank (14), the bottom of the carbon storage tank (11) is connected with a vibrating screen (15) through a conveying pipe, the outlet of the vibrating screen (15) is connected with a carbon hopper (16) with a screen, the carbon hopper (16) with a screen is connected with a carbon storage tank (17) through a conveying pipe, the bottom of the carbon storage tank (17) is connected with a desorption column (21) through a conveying pipe and a conveying pump, the bottom of the desorption column (21) is connected with an acid washing tank (31) through a conveying pipe and a conveying pump, the carbon storage tank (11) and the acid washing tank (31) are both provided with an ultrasonic probe one (4), and the desorption column (21) is provided with an ultrasonic probe two (6).

2. The system for preventing and controlling the plugging of the desorption electrode system according to claim 1, characterized in that: The ultrasonic probe two (6) comprises a shell (41), a first-stage amplitude transformer (42) and a second-stage amplitude transformer (44) connected in sequence, and an ultrasonic tool head (45) connected below the second-stage amplitude transformer (44).

3. The system for preventing and controlling the plugging of the desorption electrode system according to claim 1, characterized in that: The ultrasonic probe one (4) comprises a shell (41), a first-stage amplitude transformer (42) and a second-stage amplitude transformer (44) connected in sequence, and an ultrasonic tool head (45) connected below the second-stage amplitude transformer (44), a variable-amplitude-rod shell (46) is arranged outside the ultrasonic tool head (45), the top of the variable-amplitude-rod shell (46) is connected with the second-stage amplitude transformer (44), a plurality of air inlets (43) are formed in the side wall of the second-stage amplitude transformer (44), the air inlets (43) lead to the inner cavity of the variable-amplitude-rod shell (46) from the side wall of the second-stage amplitude transformer (44), the air inlets (43) are connected with air inlet pipes (5), and a plurality of air outlets (47) are formed in the circumferential wall of the variable-amplitude-rod shell (46).

4. The system for preventing and controlling the plugging of the desorption electrode system according to claim 1, characterized in that: The residue filter tank (14) is funnel-shaped, and a screen is arranged on the upper part of the funnel.

5. The system for preventing and controlling the plugging of the desorption electrode system according to claim 1, characterized in that: A sewage pipe is arranged below the carbon storage tank (11) and the carbon storage tank (17), a screen is arranged on the flower pipe of the sewage pipe, and a valve is arranged on the pipe.

6. The system for preventing and controlling the plugging of a desorption electrode system according to claim 1, wherein: Valves are arranged on the conveying pipes connected with the carbon storage tank (11), the carbon hopper (16) with a screen and the carbon storage tank (17).

7. The system for preventing and controlling the plugging of the desorption electrode system according to claim 2 or 3, characterized in that: The first-stage amplitude transformer (42) and the second-stage amplitude transformer (44) are connected through flanges.

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