Step-by-step impurity removal method for impurity-containing gold-loaded resin

Abstract

The invention discloses a step-by-step impurity removal method for impurity-containing gold-loaded resin, and belongs to the technical field of mineral processing. The method specifically comprises the following steps: mixing the impurity-containing gold-loaded resin into slurry, putting the slurry into a small-sized thickener, stirring, standing, and removing fine light flocculent impurities on the upper layer; the impurity-removed gold-loaded resin is subjected to size mixing and placed in a vibrating spiral chute, large-specific-gravity coarse-particle colloidal impurities are removed, then the impurity-removed gold-loaded resin is placed in a multi-layer wet-type vibrating screening machine, pine needles, wood chips and other impurities with large particle sizes are removed through an upper-layer large-aperture vibrating screen, fine-crushed humus impurities are removed from an upper-layer undersize material through a lower-layer small-aperture vibrating screen, and the gold-loaded resin is subjected to impurity removal; the undersize is impurity-removed gold-loaded resin; all the obtained impurities are combined and checked and screened through a suspended vibration conical surface sorting machine, coarse particle products are impurities, and a small amount of fine particle products are resin. Aiming at the characteristics of different impurities in the gold-carrying resin, the invention develops a unique step-by-step impurity removal process, and high-quality gold extraction raw materials can be provided for resin ore pulp process enterprises.

Description

Technical Field

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

[0002] Gold is widely used in the fields of medicine, aerospace, etc. due to its good physical and chemical properties. It plays an important role in the national economy and social development. The most commonly used method for extracting gold from gold mines is wet leaching, which can be divided into cyanide leaching and non-cyanide leaching according to its leaching agent. Since non-cyanide leaching agents have problems such as large reagent consumption and unstable leaching efficiency, cyanide leaching is still the most widely used leaching method.

[0003] In order to further improve the efficiency of gold extraction by cyanide leaching, the cyanidation method is combined with resins, activated carbon and other media with adsorption properties to form the resin slurry method and the cyanide carbon slurry method, which further improves the adaptability of the cyanidation method. The resin slurry method is an advanced non-filtration gold extraction technology, that is, it uses leaching and adsorption at the same time, without the need for solid-liquid separation, washing and solution clarification, degassing and other processes of the slurry. The toughness of the resin is greater than that of activated carbon, which can shorten the cyanidation time to a certain extent, improve the adsorption efficiency of gold in the slurry, and reduce the loss of fine gold-carrying resin in the tailings. Therefore, the resin slurry method of gold extraction in gold mines has significant advantages.

[0004] In view of the resin slurry method cyanidation gold extraction process, a large number of scholars have conducted research on improving the resin adsorption performance, gold and silver selectivity, and reducing the resin production cost. However, there is no systematic research and process for the problem of high impurity rate of gold-loaded resin caused by various physical impurities brought in during the processing of mineral raw materials in the gold mine resin slurry method production process. When the impure gold-loaded resin enters the subsequent desorption, regeneration and activation process, the processing capacity of the process engineering equipment is increased, the agent consumption of the desorption and regeneration activation process is increased, and it is not conducive to the recycling of the resin. Therefore, the present invention proposes a step-by-step treatment method for removing impurities such as fine and light floccules, colloid particles and plastics, pine needles, wood chips, and fine and broken humus from gold-loaded resin, which can effectively remove impurities carried by the production process in the gold-loaded resin, is conducive to the subsequent resin desorption, activation, regeneration and other processes, can provide high-quality clean gold-loaded resin for resin slurry method enterprises, and is conducive to the subsequent recycling of resin. Summary of the invention

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

[0006] (1) The impure gold-loaded resin is slurried and placed in a thickener. After being stirred and allowed to stand in the thickener, the fine and light flocculent impurities on the upper layer are removed by overflow.

[0007] (2) Repeat step (1) until there is 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 slurry 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, a vibrating spiral chute is used to make the impure gold-loaded resin distributed in different areas on the chute surface according to its specific gravity by using the combined effects of water flow, gravity of the impure gold-loaded resin, and friction between the impure gold-loaded resin and the bottom of the chute. The gold-loaded resin with a small specific gravity forms an external 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 later use.

[0009] (4) The gold-loaded resin after the impurities are removed in step (3) is placed in a wet multi-layer vibrating screen machine. Through vibration screening, the resin will pass through the screen and sink to the bottom of the tank, and the impurities will 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 vibration cone separator to recover the gold-loaded resin particles carried by the impurities.

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

[0012] Preferably, in the step (1), the impure 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 gradually decreases from top to bottom, and the diameter of the bottom layer is ≤1 mm.

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

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

[0018] Beneficial effects of the present invention

[0019] (1) The present invention aims at gold-loaded resin containing a large amount of impurities, and adopts a small thickener, a vibrating spiral chute and a multi-layer vibrating screen to systematically remove various impurities. 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 and obtain clean, low-impurity gold-loaded resin, thereby achieving efficient purification and recovery of the gold-loaded resin. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and through specific implementation methods. However, the following embodiments are only simple 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 impure gold-loaded resin was selected from the No. 19 leaching tank of a gold mining enterprise in Chifeng, Inner Mongolia, where the impure gold-loaded resin had a total wet weight of 10.00 kg and a total impurity rate of 48%. The step-by-step impurity removal method of the gold-loaded resin described in the present invention is used, and the process flow is as follows: Figure 1 As shown, proceed as follows:

[0025] (1) The impure gold-loaded resin is slurried and placed in a small thickener with a slurry concentration of 15%. After being stirred and allowed to stand in the small thickener, the fine and light flocculent impurities on the upper layer are 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 that has been preliminarily decontaminated 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 density of large-particle, high-density colloidal impurities is greatly different from that of the resin, the gold-loaded resin with a small specific gravity forms an external vortex with the water flow and is carried away by the water flow and discharged from the outer spiral, while the large-particle, high-density colloidal impurities form an internal vortex with the water flow and are discharged from the inner spiral, thereby completing the separation and removal of large-particle, 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, wherein the upper screen of the wet multi-layer vibrating screen is a large-aperture isolation screen with a diameter of 10 mm, and the lower screen is a small-aperture isolation screen with a diameter of 1 mm. Impurities with larger particle sizes are removed through vibration screening, 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 step (3) and step (4) are combined and screened by a suspended vibration cone separator, with a suspended vibration cone speed of 15 r / min and a vibration frequency of 30 Hz. At this time, the total amount of impurities in the product on the sieve is 4265.68 g, and a small amount of clean gold-loaded resin is obtained. The wet weight is 23.56 g, which is combined with the gold-loaded resin obtained in step (4). The total wet weight of the clean gold-loaded resin is 5210.21 g.

[0030] Through the above implementation method, the impurities in the impurities gold-loaded resin provided by a factory in Chifeng, Inner Mongolia were tested and studied, and various types of impurities in the impurities gold-loaded resin were removed step by step and achieved good results. The comprehensive indicators are: the total wet weight of the clean resin is 5210.21g; 523.41g of light flocculent impurities are removed, and 4265.68g of impurities such as heavy colloid, sawdust, pine needles, and fine humus are removed, and the total amount of impurities removed is 4789.09g, and the total impurity removal rate is 99.7727%.

[0031] Example 2

[0032] The impure gold-loaded resin was selected from the No. 2 leaching tank of a gold mining enterprise in Chifeng, Inner Mongolia, wherein the impure gold-loaded resin had a total wet weight of 10.00 kg and a total impurity rate of 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 impure gold-loaded resin is slurried and placed in a small thickener. After stirring and standing in the small thickener, the slurry concentration is 20%, and the fine and light flocculent impurities on the upper layer are 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 that has been initially decontaminated 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 density of large-particle, high-density colloidal impurities is greatly different from that of 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, high-density colloidal impurities form an inner vortex with the water flow and are discharged from the inner spiral, thereby completing the separation and removal of large-particle, 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, wherein the upper screen of the wet multi-layer vibrating screen is a large-aperture isolation screen with a diameter of 10 mm, and the lower screen is a small-aperture isolation screen with a diameter of 1 mm. Impurities with larger particle sizes are removed through vibration screening, 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 step (3) and step (4) are combined and screened by a suspended vibration cone separator, with a suspended vibration cone speed of 20 r / min and a vibration frequency of 20 Hz. At this time, the total amount of impurities in the product on the sieve is 4265.68 g, and a small amount of clean gold-loaded resin is obtained. The wet weight is 15.98 g, which is combined with the gold-loaded resin obtained in step (4). The total wet weight of the clean gold-loaded resin is 4901.64 g.

[0038] Through the above implementation method, the impurities in the impurities gold-loaded resin provided by a factory in Chifeng, Inner Mongolia were tested and studied, and various types of impurities in the impurities gold-loaded resin were removed step by step and achieved good results. The comprehensive indicators are: the total wet weight of the clean resin is 4901.64g; 485.68g of light flocculent impurities are removed, and 4612.55g of impurities such as heavy colloid, sawdust, pine needles, and fine humus are removed, and the total amount of impurities removed is 5098.23g, and the total impurity removal rate is 99.9653%.

[0039] Example 3

[0040] The artificially mixed impure gold-loaded resin is used, wherein the impure gold-loaded resin has a total wet weight of 10.00 kg and a total impurity rate of 50%. The gold-loaded resin step-by-step impurity removal method of the present invention is specifically carried out in the following steps:

[0041] (1) The impure gold-loaded resin is slurried and placed in a small thickener with a slurry concentration of 30%. After being stirred and allowed to stand in the small thickener, the fine and light flocculent impurities on the upper layer are 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 that has been preliminarily decontaminated 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 density of large-particle, high-density colloidal impurities is greatly different from that of 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, high-density colloidal impurities form an inner vortex with the water flow and are discharged from the inner spiral, thereby completing the separation and removal of large-particle, 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, wherein the upper screen of the wet multi-layer vibrating screen is a large-aperture isolation screen with a diameter of 10 mm, and the lower screen is a small-aperture isolation screen with a diameter of 1 mm. Impurities with larger particle sizes are removed through vibration screening, 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 step (3) and step (4) are combined and screened by a suspended vibration cone separator, with a suspended vibration cone speed of 25 r / min and a vibration frequency of 10 Hz. At this time, the total amount of impurities in the product on the sieve is 4265.68 g, and a small amount of clean gold-loaded resin is obtained. The wet weight is 17.18 g, which is combined with the gold-loaded resin obtained in step (4). The total wet weight of the clean gold-loaded resin is 5002.35 g.

[0046] Through the above implementation method, the impurities in the impurities gold-loaded resin provided by a factory in Chifeng, Inner Mongolia were tested and studied, and various types of impurities in the impurities gold-loaded resin were removed step by step and achieved good results. The comprehensive indicators are: the total wet weight of the clean resin is 5002.35g; 405.10g of light flocculent impurities are removed, and 4592.29g of impurities such as heavy colloid, sawdust, pine needles, and fine humus are removed, and the total amount of impurities removed is 4997.39g, and the total impurity removal rate is 99.9478%.

[0047] Finally, the above embodiments are only used to illustrate the technical solution 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 solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution 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 being stirred and allowed to stand in the thickener, the fine and light flocculent impurities on the upper layer are removed by overflow; (2) repeating 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 later use; (4) placing the gold-loaded resin after the impurities are removed in step (3) in a wet multi-layer vibrating screen machine, and vibrating and screening the resin so that the resin will pass through the screen and sink to the bottom of the tank, while the impurities will remain on the screen and be reserved for future use; (5) The impurities obtained in step (3) and step (4) are mixed and inspected and screened by a suspended vibration cone separator, and the gold-loaded resin particles carried by the impurities are recovered.

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 impure 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 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 vibration cone separator ranges from 15 to 25 r / min, and the vibration frequency ranges from 10 to 30 Hz.

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