A method for stepwise impurity removal of a gold-containing resin

Abstract

The application discloses a kind of containing impurity gold resin step-by-step impurity removal method, belong to mineral processing technical field.It is specific to: after containing impurity gold resin is adjusted slurry, be placed in small thickener, and after stirring and standing, remove upper layer fine and broken light flocculent impurities;After the gold resin of impurity removal is adjusted slurry and is placed in vibration spiral chute, remove large specific gravity coarse particle gum impurities, then the gold resin of impurity removal is placed in multilayer wet type vibrating screen machine, and remove the larger particle size pine needle, wood chips and other impurities by upper layer large aperture vibrating screen, and remove fine and broken humus impurities by lower layer small aperture vibrating screen, and the gold resin after impurity removal is screened under screen;All impurities obtained are combined, and are screened by suspension vibration conical surface sorting machine, and coarse particle product is impurity, and a small amount of fine particle product is resin.According to the characteristics of different impurities in gold resin, the application develops a unique step-by-step impurity removal process, which can provide high-quality gold extraction raw materials for resin ore pulp method enterprises.

Description

Technical Field

[0001] The invention relates to a step-by-step impurity removal method for an impurity-containing gold-loaded resin, and belongs to the technical field of mineral processing. Background Art

[0002] Gold, due to its excellent physical and chemical properties, is widely used in fields such as medicine and aerospace, playing a vital role in national economic and social development. Currently, the most common method for extracting gold from gold ore is wet leaching, which can be further divided into cyanide leaching and non-cyanide leaching based on the leaching agent used. However, due to the high reagent consumption and unstable leaching efficiency of non-cyanide leaching agents, cyanide leaching remains the most widely used leaching method.

[0003] To further improve the efficiency of cyanide leaching, the cyanide process has been combined with adsorbent media such as resins and activated carbon, resulting in the resin-slurry process and the cyanide-carbon slurry process, further enhancing the adaptability of the cyanide process. The resin-slurry process is an advanced, non-filtration gold extraction technology that utilizes simultaneous leaching and adsorption, eliminating the need for solid-liquid separation, washing, solution clarification, and degassing. Furthermore, the resin's greater toughness than activated carbon can shorten the cyanide process to a certain extent, improve the adsorption efficiency of gold in the slurry, and reduce the loss of finely divided gold-loaded resin in the tailings. Therefore, the resin-slurry process offers significant advantages for gold extraction from gold mines.

[0004] At resin slurry method cyanide gold extraction process, existing large amounts of scholars have studied improving resin adsorption performance, gold and silver selectivity, reducing resin production cost etc., but for the various physical impurities brought into in the mineral raw material processing process in the gold ore resin slurry method production process, thereby causing the problem of high impurity rate of the gold-carrying resin, there is no systematic de-mixing research and process. When the impurity-carrying gold-carrying resin enters subsequent desorption, regeneration and activation process, the processing capacity of process engineering equipment is increased, the reagent consumption of desorption and regeneration activation process is increased, and it is unfavorable for the recycling of resin. Therefore, the present invention proposes a step-by-step treatment method for removing impurities such as fine and light flocculents, colloids and plastics, pine needles, wood chips, fine and broken humus from gold-carrying resin, which can effectively remove the impurities carried because of the production process in the gold-carrying resin, is conducive to the carrying out of the techniques such as subsequent resin desorption, activation, regeneration, can provide high-quality clean gold-carrying resin for resin slurry method enterprise, and is conducive to the subsequent recycling of resin. Summary of the Invention

[0005] In order to effectively recycle the impurity-containing gold-loaded resin, the present invention provides a step-by-step impurity removal method for the impurity-containing gold-loaded resin, comprising the following steps:

[0006] (1) The impurity-containing gold-loaded resin is slurried and placed in a thickener. After stirring and standing in the thickener, the fine and light flocculent impurities on the upper layer are removed by overflow.

[0007] (2) Repeat step (1) until there are no flocculent floating impurities in the supernatant.

[0008] (3) The gold-loaded resin after the preliminary decontamination in step (2) is adjusted to a certain pulp concentration and then placed in a vibrating spiral chute. Since the density of large-particle, high-density colloidal impurities is greatly different from that of the resin, the vibrating spiral chute is used to adopt the combined effect of water flow, the gravity of the impure gold-loaded resin, and the friction between the impure gold-loaded resin and the bottom of the chute to distribute the impure gold-loaded resin on different areas on the chute surface according to the specific gravity. The gold-loaded resin with a small specific gravity forms an outer vortex with the water flow and is carried away by the water flow and discharged from the outer spiral, while the large-particle colloidal impurities with a large specific gravity form an inner vortex with the water flow and are discharged from the inner spiral. The gold-loaded resin product and impurities are intercepted separately, and the impurities are retained for future use.

[0009] (4) The gold-loaded resin after the impurities are removed in step (3) is placed in a wet multi-layer vibrating screen. Through vibration screening, the resin will pass through the screen and sink to the bottom of the tank, while the impurities remain on the screen. The impurities are reserved for future use.

[0010] (5) The impurities obtained in step (3) and step (4) are mixed and sieved by a suspended cone separator to recover the gold-loaded resin particles carried by the impurities.

[0011] Preferably, in step (1), the specifications of the thickener are selected according to the output of the gold-loaded resin.

[0012] Preferably, in the step (1), the impurity-containing gold-loaded resin is slurried to obtain a slurry with a concentration of 15% to 30%.

[0013] Preferably, in step (3), the specifications of the vibrating spiral chute are set according to the output of the gold-loaded resin.

[0014] Preferably, in step (3), the slurry concentration is 15% to 30%.

[0015] Preferably, in step (4), the diameter of the sieve holes in the multi-layer vibrating screen machine gradually decreases from top to bottom, and the pore diameter of the bottom layer is ≤1 mm.

[0016] Preferably, the speed range of the suspended vibration cone concentrator selected in step (5) is 15 to 25 r / min, and the vibration frequency is 10 to 30 Hz.

[0017] The impurity-containing gold-loaded resin of the present invention is produced by cyanide leaching of gold ore resin slurry method.

[0018] Beneficial effects of the present invention

[0019] (1) The present invention aims at removing various impurities from gold-loaded resin containing a large amount of impurities by using a small thickener, a vibrating spiral chute and a multi-layer vibrating screen. This method is low-cost, environmentally friendly and has good feasibility.

[0020] (2) The present invention fully distinguishes the types of impurities in the gold-loaded resin, selects appropriate equipment and processes according to the types and characteristics of the impurities, and adopts a step-by-step removal method to systematically classify and remove different types of impurities. This process can comprehensively remove impurities, obtain clean gold-loaded resin with low impurity content, and achieve efficient purification and recovery of the gold-loaded resin. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a process flow diagram of a step-by-step impurity removal method for gold-loaded resin. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific embodiments. However, the following embodiments are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

[0023] Example 1

[0024] The impurity-containing gold-loaded resin was selected from the No. 19 leaching tank of a gold mining enterprise in Chifeng, Inner Mongolia. The wet weight of the impurity-containing gold-loaded resin was 10.00 kg, and the total impurity content was 48%. The step-by-step impurity removal method of the gold-loaded resin described in the present invention was used. The process flow is as follows: Figure 1 As shown, proceed as follows:

[0025] (1) The impurity-loaded gold resin is slurried and placed in a small thickener with a slurry concentration of 15%. After stirring and standing in the small thickener, the upper layer of fine and light flocculent impurities is removed by overflow.

[0026] (2) Repeat step (1) until there is no flocculent floating impurities in the supernatant of the gold-loaded resin after preliminary decontamination by a small thickener, and obtain 523.41 g of light flocculent floating impurities and 9476.59 g of impure gold-loaded resin. No impure gold-loaded resin is lost in this step.

[0027] (3) The gold-loaded resin after the preliminary decontamination by the small and medium-sized thickener in step (2) is adjusted to a certain pulp concentration and then placed in a vibrating spiral chute. The pulp concentration is 15%. Since the large-particle and high-density colloidal impurities have a large difference in density from the resin, the gold-loaded resin with a small specific gravity forms an outer vortex with the water flow and is carried away by the water flow and discharged from the outer spiral, while the large-particle colloidal impurities with a large specific gravity form an inner vortex with the water flow and are discharged from the inner spiral, thereby completing the separation and removal of large-particle and high-density colloidal impurities.

[0028] (4) The gold-loaded resin after the impurity removal in step (3) is placed in a wet multi-layer vibrating screen. The upper sieve of the wet multi-layer vibrating screen is a large-aperture isolation sieve with a diameter of 10 mm, and the lower sieve is a small-aperture isolation sieve with a diameter of 1 mm. Through vibration screening, impurities with larger particle sizes are removed, and the fine humus impurities are separated from the gold-loaded resin to obtain most of the clean gold-loaded resin with a wet weight of 5186.65 g.

[0029] (5) The various types of impurities removed in steps (3) and (4) were combined and screened using a suspended vibrating cone separator at a speed of 15 r / min and a vibration frequency of 30 Hz. At this point, the total amount of impurities in the product on the sieve was 4265.68 g. A small amount of clean gold-loaded resin was obtained, which had a wet weight of 23.56 g. This was combined with the gold-loaded resin obtained in step (4), resulting in a total clean gold-loaded resin wet weight of 5210.21 g.

[0030] The above-described implementation method was used in a pilot study on gold-loaded resin containing impurities provided by a factory in Chifeng, Inner Mongolia. The step-by-step removal of various impurities from the resin achieved excellent results. Overall performance was as follows: the clean resin had a total wet weight of 5210.21g; 523.41g of light flocculent impurities were removed; and 4265.68g of heavy impurities, including colloids, sawdust, pine needles, and finely divided humus, were removed. The total impurity removal amounted to 4789.09g, for a total impurity removal rate of 99.7727%.

[0031] Example 2

[0032] The impurity-containing gold-loaded resin was selected from the No. 2 leaching tank of a gold mining enterprise in Chifeng, Inner Mongolia. The wet weight of the impurity-containing gold-loaded resin was 10.00 kg, and the total impurity content was 51%. The step-by-step impurity removal method of the gold-loaded resin described in the present invention was used, specifically in the following steps:

[0033] (1) The impurity-loaded gold resin is slurried and placed in a small thickener. After stirring and standing in the small thickener, the slurry concentration is 20%. The upper layer of fine and light flocculent impurities is removed by overflow.

[0034] (2) Repeat step (1) until there is no flocculent floating impurities in the supernatant of the gold-loaded resin after preliminary decontamination by a small thickener, and obtain 485.68 g of light flocculent floating impurities and 9514.32 g of impure gold-loaded resin. No impure gold-loaded resin is lost in this step.

[0035] (3) The gold-loaded resin after the preliminary decontamination by the small and medium-sized thickener in step (2) is adjusted to a certain pulp concentration and then placed in a vibrating spiral chute. The pulp concentration is 20%. Since the large-particle and high-density colloidal impurities have a large difference in density from the resin, the gold-loaded resin with a small specific gravity forms an outer vortex with the water flow and is carried away by the water flow and discharged from the outer spiral, while the large-particle colloidal impurities with a large specific gravity form an inner vortex with the water flow and are discharged from the inner spiral, thereby completing the separation and removal of the large-particle and high-density colloidal impurities.

[0036] (4) The gold-loaded resin after the impurity removal in step (3) is placed in a wet multi-layer vibrating screen. The upper sieve of the wet multi-layer vibrating screen is a large-aperture isolation sieve with a diameter of 10 mm, and the lower sieve is a small-aperture isolation sieve with a diameter of 1 mm. Through vibration screening, impurities with larger particle sizes are removed, and the fine humus impurities are separated from the gold-loaded resin to obtain most of the clean gold-loaded resin with a wet weight of 4885.66 g.

[0037] (5) The various types of impurities removed in steps (3) and (4) were combined and screened using a suspended vibrating cone separator at a speed of 20 r / min and a vibration frequency of 20 Hz. At this point, the total amount of impurities in the product on the sieve was 4265.68 g. A small amount of clean gold-loaded resin was obtained, and the wet weight was 15.98 g. This was combined with the gold-loaded resin obtained in step (4), resulting in a total clean gold-loaded resin wet weight of 4901.64 g.

[0038] The above-described implementation method was used in a pilot study on gold-loaded resin containing impurities provided by a factory in Chifeng, Inner Mongolia. The step-by-step removal of various impurities from the resin was successful. Overall, the clean resin achieved a total wet weight of 4901.64g. 485.68g of light flocculent impurities were removed, along with 4612.55g of heavier impurities such as colloid, sawdust, pine needles, and finely divided humus. The total impurity removal rate was 99.9653%, for a total of 5098.23g.

[0039] Example 3

[0040] A gold-loaded resin containing impurities was artificially mixed, wherein the wet weight of the gold-loaded resin was 10.00 kg and the total impurity content was 50%. The gold-loaded resin was subjected to a step-by-step impurity removal method according to the present invention, specifically the following steps:

[0041] (1) The impurity-loaded gold resin is slurried and placed in a small thickener with a slurry concentration of 30%. After stirring and standing in the small thickener, the upper layer of fine and light flocculent impurities is removed by overflow.

[0042] (2) Repeat step (1) until there is no flocculent floating impurities in the supernatant of the gold-loaded resin after preliminary decontamination by a small thickener, and obtain 405.10 g of light flocculent floating impurities and 9594.90 g of impure gold-loaded resin. No impure gold-loaded resin is lost in this step.

[0043] (3) The gold-loaded resin after the preliminary decontamination by the small and medium-sized thickener in step (2) is adjusted to a certain pulp concentration and then placed in a vibrating spiral chute. The pulp concentration is 30%. Since the large-particle and high-density colloidal impurities have a large difference in density from the resin, the gold-loaded resin with a small specific gravity forms an outer vortex with the water flow and is carried away by the water flow and discharged from the outer spiral, while the large-particle colloidal impurities with a large specific gravity form an inner vortex with the water flow and are discharged from the inner spiral, thereby completing the separation and removal of large-particle and high-density colloidal impurities.

[0044] (4) The gold-loaded resin after the impurity removal in step (3) is placed in a wet multi-layer vibrating screen. The upper sieve of the wet multi-layer vibrating screen is a large-aperture isolation sieve with a diameter of 10 mm, and the lower sieve is a small-aperture isolation sieve with a diameter of 1 mm. Through vibration screening, impurities with larger particle sizes are removed, and the fine humus impurities are separated from the gold-loaded resin to obtain most of the clean gold-loaded resin with a wet weight of 4985.17 g.

[0045] (5) The various types of impurities removed in steps (3) and (4) were combined and screened using a suspended vibrating cone separator at a speed of 25 r / min and a vibration frequency of 10 Hz. At this point, the total amount of impurities in the product on the sieve was 4265.68 g. A small amount of clean gold-loaded resin was obtained, which had a wet weight of 17.18 g. This was combined with the gold-loaded resin obtained in step (4), resulting in a total clean gold-loaded resin wet weight of 5002.35 g.

[0046] The above-described implementation method was used in a pilot study on gold-loaded resin containing impurities provided by a factory in Chifeng, Inner Mongolia. The step-by-step removal of various impurities from the resin achieved excellent results. Overall performance was as follows: the total wet weight of clean resin was 5002.35g; 405.10g of light flocculent impurities were removed; and 4592.29g of heavy impurities, such as colloids, sawdust, pine needles, and finely divided humus, were removed. The total impurity removal amounted to 4997.39g, for a total impurity removal rate of 99.9478%.

[0047] Finally, the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A step-by-step method for removing impurities from impure gold-loaded resin, characterized in that: The steps include: (1) The impurity-containing gold-loaded resin is slurried and placed in a thickener. After stirring and standing in the thickener, the upper layer of fine and light flocculent impurities is removed by overflow; (2) Repeat step (1) until there is no flocculent floating impurities in the supernatant; (3) adjusting the gold-loaded resin after the preliminary impurity removal in step (2) to a certain pulp concentration and placing it in a vibrating spiral chute to intercept the gold-loaded resin product and impurities respectively, and retaining the impurities for future use; (4) placing the gold-loaded resin after the impurities are removed in step (3) in a wet multi-layer vibrating screen machine, and through vibration screening, the resin will pass through the screen and sink to the bottom of the tank, while the impurities will remain on the screen, and the impurities will be reserved for future use; (5) The impurities obtained in step (3) and step (4) are mixed and inspected and screened by a suspended cone sorter to recover the gold-loaded resin particles carried by the impurities.

2. The step-by-step impurity removal method of the impurity-containing gold-loaded resin according to claim 1, characterized in that: In the step (1), the impurity-containing gold-loaded resin is slurried to obtain a slurry with a concentration of 15% to 30%.

3. The step-by-step impurity removal method of the impurity-containing gold-loaded resin according to claim 1, characterized in that: The slurry concentration in step (3) is 15% to 30%.

4. The step-by-step impurity removal method of the impurity-containing gold-loaded resin according to claim 1, characterized in that: In the step (4), the diameter of the sieve holes in the multi-layer vibrating screen machine gradually decreases from top to bottom, and the bottom layer hole diameter is ≤1 mm.

5. The step-by-step impurity removal method of the impurity-containing gold-loaded resin according to claim 1, characterized in that: In the step (5), the rotation speed of the suspended cone separator is in the range of 15 to 25 r / min, and the vibration frequency is in the range of 10 to 30 Hz.

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