Slurry making process method suitable for comprehensive utilization of gold tailing pond resources

Abstract

The invention relates to the technical field of mineral separation processes, in particular to a slurry making process method suitable for comprehensive utilization of gold tailing pond resources, which comprises the following steps: crushing gold tailings containing stones, weeds, impurities and carbon particles; adding water into the crushed materials, and enabling the materials to flow into a strong scrubbing and stirring tank for stirring; wherein stones sink into the bottom of the tank to be cleaned regularly, ore pulp is made into slurry through the high-concentration stirring tank and then pumped to the double-layer linear vibrating screen, and weeds, sundries, pebbles and carbon particles are screened out; the screened and impurity-removed ore pulp enters a first-section hydrocyclone for first-section grading operation; according to the method disclosed by the invention, by adopting the slurry making process of crushing, strong scrubbing and two-section hydrocyclone classification, the gold resources piled in the tailings pond are comprehensively recycled, and the problem that the slurry making concentration is unstable due to the fact that the tailings gold resources are piled into clusters in winter and are difficult to treat is solved; and meanwhile, the structure is simple, the investment cost of the slurry making process is reduced, and subsequent leaching of alloyed gold is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of ore dressing technology, and in particular to a pulping process method suitable for comprehensive utilization of gold tailings pond resources. Background Art

[0002] my country's gold resources are widely distributed and reserves are relatively concentrated. Gold resources are mainly rock gold, with associated gold accounting for a large proportion. There are many small deposits and few large and super-large deposits. The mining technical conditions are relatively complex, and there are few deposits available for open-pit mining. With the development of science and technology, refractory gold resources have been developed. Among my country's independent gold mines, the proportion of fine-grained, arsenic- and carbon-containing refractory resources is relatively large. Among the more than 3,000 tons of proven resource reserves, refractory resources account for about 1,000 tons, accounting for 33.3%. Therefore, it is urgent to improve the comprehensive utilization efficiency of gold resources.

[0003] Gold mines built in China in the 1970s and 1980s were restricted by the industrial policies, technical level, and metallurgical processes at the time. Most of the gold processing plants used traditional processes such as gravity separation, mercury mixing, and flotation. The production technology level was low, the production indicators were poor, and the tailings contained a high amount of gold. These tailings were mainly treated in the form of stockpiling. With the advancement of metallurgical technology, it is imperative to recycle tailings, improve the economic benefits of mines, and reduce resource waste.

[0004] To achieve comprehensive recovery of gold metal from gold tailings, pulping is an important issue in the production process. The patent of this invention is proposed to solve the problems of gold tailings resources being difficult to handle due to the clumping in winter and unstable pulping concentration. Summary of the invention

[0005] The present invention provides a pulping process method suitable for comprehensive utilization of gold tailings pond resources, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problem that the gold resources of tailings are difficult to handle due to being piled up in agglomerates in winter, resulting in unstable pulping concentration.

[0006] In order to solve the above problems, the present invention discloses a pulping process suitable for comprehensive utilization of gold tailings pond resources, comprising the following steps: S1, crushing gold tailings containing stones, weeds, debris and carbon particles; S2, adding water to the crushed material in step S1 and flowing it into a strong scrubbing and stirring tank for stirring; wherein the stones sink to the bottom of the tank and are cleaned regularly, and the slurry is made in a high-concentration stirring tank and then pumped to a double-layer linear vibrating screen to screen out weeds, debris, pebbles and carbon particles; S3, the slurry after screening and impurity removal in step S2 enters the first stage hydrocyclone for a first stage classification operation, the first stage classification sand settling enters the MQY ball mill for grinding operation, the grinding operation product returns to the first stage classification hydrocyclone, and the first stage classification overflow enters the second stage hydrocyclone; S4, the overflow of the first stage classification in step S3 enters the second stage hydrocyclone for second stage classification operation, the overflow of the second stage classification operation returns to the first stage hydrocyclone for first stage classification, and the second stage classification sedimentation enters the cyanide leaching operation; S5, the sediment after the cyanide leaching operation in step S4 enters the carbon leaching process, the carbon leaching tailings enter the filter press workshop, are dehydrated by the box filter press and then dry-discharged to the tailings pond, and the filtrate is returned for use; the gold-loaded carbon product of the carbon leaching enters the activated carbon desorption, precious liquid separation, electrolysis, and smelting to produce gold.

[0007] In the above step S1, the selected gold tailings are gold tailings with a carbon particle size of -200 mesh 80% and a gold grade of 0.6g / t-1.0g / t; wherein the crushing is performed by a 2PG-100CT double-toothed roller crusher.

[0008] In the above step S2, the size of the strong scrubbing stirring tank is Φ2000mm×2000mm; the size of the high concentration stirring tank is Φ2000mm×2000mm; the double-layer linear vibrating screen model is 2ZS1230, with the size of the upper layer 5mm and the lower layer 1.5mm.

[0009] In the above step S3, the specification of the first-stage hydrocyclone is FX350-12, and the overflow particle size is -325 mesh 70%-75%; the size of the MQY ball mill is Φ2700mm×3600mm; the specification of the second-stage hydrocyclone is FX200-18, and the overflow particle size is -325 mesh 85%-90%.

[0010] In the above step S4, the concentration of the second-stage classified sand settling is 40%±2%.

[0011] The present invention adopts the pulping process of "crushing + strong scrubbing + two-stage hydrocyclone classification" to comprehensively recycle the gold resources stored in the tailings pond, thereby solving the problem that the gold resources in the tailings are difficult to handle due to the clumping in winter, resulting in unstable pulping concentration; at the same time, the present invention adopts two-stage hydrocyclone classification, which has a simple structure and easy-to-obtain materials. Compared with the conventional thickener, the investment cost of the pulping process is reduced, which is convenient for the subsequent leaching of the gold alloy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0013] Figure 1 The process flow chart of an embodiment of the present invention. DETAILED DESCRIPTION

[0014] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0015] Example 1: Figure 1 As shown, the embodiment of the present invention discloses a pulping process method suitable for comprehensive utilization of gold tailings pond resources, comprising the following steps: S1, crushing gold tailings containing stones, weeds, debris and carbon particles; S2, adding water to the crushed material in step S1 and flowing it into a strong scrubbing and stirring tank for stirring; wherein the stones sink to the bottom of the tank and are cleaned regularly, and the slurry is made in a high-concentration stirring tank and then pumped to a double-layer linear vibrating screen to screen out weeds, debris, pebbles and carbon particles; S3, the slurry after screening and impurity removal in step S2 enters the first stage hydrocyclone for a first stage classification operation, the first stage classification sand settling enters the MQY ball mill for grinding operation, the grinding operation product returns to the first stage classification hydrocyclone, and the first stage classification overflow enters the second stage hydrocyclone; S4, the overflow of the first stage classification in step S3 enters the second stage hydrocyclone for second stage classification operation, the overflow of the second stage classification operation returns to the first stage hydrocyclone for first stage classification, and the second stage classification sedimentation enters the cyanide leaching operation; S5, the sediment after the cyanide leaching operation in step S4 enters the carbon leaching process, the carbon leaching tailings enter the filter press workshop, are dehydrated by the box filter press and then dry-discharged to the tailings pond, and the filtrate is returned for use; the gold-loaded carbon product of the carbon leaching enters the activated carbon desorption, precious liquid separation, electrolysis, and smelting to produce gold.

[0016] In step S1, the gold tailings selected are gold tailings with a carbon particle size of -200 mesh 80% and a gold grade of 0.6g / t-1.0g / t; and the crushing is performed by a 2PG-100CT double-toothed roller crusher. In winter, gold tailings are subject to agglomeration and icing, so they need to be crushed.

[0017] Among them, in step S2, the size of the strong scrubbing stirring tank is Φ2000mm×2000mm; the size of the high-concentration stirring tank is Φ2000mm×2000mm; the double-layer linear vibrating screen model is 2ZS1230, and the size is 5mm for the upper layer and 1.5mm for the lower layer. By setting up the double-layer linear vibrating screen, weeds, debris, pebbles, and carbon particles are screened out to prevent carbon particles from entering the grinding operation and affecting production indicators.

[0018] Among them, in step S3, the specification of the first-stage hydrocyclone is FX350-12, and the overflow particle size is -325 mesh 70%-75%; the size of the MQY ball mill is Φ2700mm×3600mm; the specification of the second-stage hydrocyclone is FX200-18, and the overflow particle size is -325 mesh 85%-90%.

[0019] In step S4, the concentration of the second-stage classification sand is 40%±2%. The main purpose of the second-stage classification is to replace the traditional thickener and control the concentration entering the leaching operation.

[0020] Among them, in step S5, the gold-loaded carbon of the carbon leaching product enters the activated carbon desorption, precious liquid separation, electrolysis, smelting and other processes to output >95% of the gold content.

[0021] In summary, the present invention adopts the pulping process of "crushing + strong scrubbing + two-stage hydrocyclone classification" to comprehensively recycle the gold resources stored in the tailings pond, thereby solving the problem that the gold resources in the tailings are difficult to handle due to the clumping in winter, resulting in unstable pulping concentration; at the same time, the present invention adopts two-stage hydrocyclone classification, which has a simple structure and easy-to-obtain materials. Compared with the conventional thickener, the investment cost of the pulping process is reduced, which is convenient for the subsequent leaching of mixed gold.

[0022] Embodiment 2: The embodiment of the present invention discloses a pulping process suitable for comprehensive utilization of gold tailings pond resources, comprising the following steps: (1) Gold tailings (which may agglomerate and freeze in winter) with a particle size of -200 mesh 80% and a gold grade of 0.81 g / t containing a certain amount of stones, weeds, debris and carbon particles were crushed using a 2PG-100CT double-toothed roller crusher; (2) After crushing, the material is added with water and flows into a strong scrubbing and stirring tank for stirring. The stones sink to the bottom of the tank and are cleaned regularly. After the slurry is made in a high-concentration stirring tank, it is pumped to the vibrating screen to screen out weeds, debris, pebbles and carbon particles. The size of the strong scrubbing and stirring tank is Φ2000mm×2000mm, the size of the high-concentration stirring tank is Φ2000mm×2000mm, and the double-layer linear vibrating screen model is 2ZS1230, with the size of the upper layer 5mm and the lower layer 1.5mm; (3) After screening and impurity removal, the slurry enters the first stage hydrocyclone for a first stage classification operation. The first stage classification sand settling enters the grinding operation. The grinding operation product returns to the first stage classification hydrocyclone. The first stage classification overflow (fineness is -325 mesh 72%) enters the second stage hydrocyclone. The first stage hydrocyclone specification is FX350-12, the ball mill specification is MQY type Φ2700mm×3600mm, and the second stage hydrocyclone specification is FX200-18; (4) The overflow from the second stage classification (fineness of -325 mesh 87%) is returned to the first stage classification, and the sand settling from the second stage classification (concentration of 41.2%) enters the conventional carbon leaching process (CIL). The carbon leaching tailings enter the filter press workshop, are dehydrated by the box filter press, and are discharged to the tailings pond, and the filtrate is returned for use. The gold-loaded carbon produced by carbon leaching enters the activated carbon desorption, precious liquid separation, electrolytic deposition, smelting and other processes to produce 97.8% gold.

[0023] Embodiment 3: The embodiment of the present invention discloses a pulping process suitable for comprehensive utilization of gold tailings pond resources, comprising the following steps: (1) Gold tailings (which may agglomerate and freeze in winter) with a particle size of -200 mesh 80% and a gold grade of 0.65 g / t containing a certain amount of stones, weeds, debris and carbon particles were crushed using a 2PG-100CT double-toothed roller crusher; (2) After crushing, the material is added with water and flows into a strong scrubbing and stirring tank for stirring. The stones sink to the bottom of the tank and are cleaned regularly. After the slurry is made in a high-concentration stirring tank, it is pumped to the vibrating screen to screen out weeds, debris, pebbles and carbon particles. The size of the strong scrubbing and stirring tank is Φ2000mm×2000mm, the size of the high-concentration stirring tank is Φ2000mm×2000mm, and the double-layer linear vibrating screen model is 2ZS1230, with the size of the upper layer 5mm and the lower layer 1.5mm; (3) After screening and impurity removal, the slurry enters the first stage hydrocyclone for a first stage classification operation. The first stage classification sand settling enters the grinding operation. The grinding operation product returns to the first stage classification hydrocyclone. The first stage classification overflow (fineness is -325 mesh 75%) enters the second stage hydrocyclone. The first stage hydrocyclone specification is FX350-12, the ball mill specification is MQY type Φ2700mm×3600mm, and the second stage hydrocyclone specification is FX200-18; (4) The overflow from the second stage classification operation (fineness is -325 mesh 89%) is returned to the first stage classification, and the sand settling from the second stage classification (concentration is 40.4%) enters the conventional carbon leaching process (CIL). The carbon leaching tailings enter the filter press workshop, are dehydrated by the box filter press, and are discharged to the tailings pond after being dry-discharged. The filtrate is returned for use. The gold-loaded carbon produced by carbon leaching enters the activated carbon desorption, precious liquid separation, electrolytic deposition, smelting and other processes to produce 96.5% gold.

[0024] Embodiment 4: The embodiment of the present invention discloses a pulping process suitable for comprehensive utilization of gold tailings pond resources, comprising the following steps: (1) Gold tailings (which may agglomerate and freeze in winter) with a particle size of -200 mesh 80% and a gold grade of 0.92 g / t containing a certain amount of stones, weeds, debris and carbon particles were crushed using a 2PG-100CT double-toothed roller crusher; (2) After crushing, the material is added with water and flows into a strong scrubbing and stirring tank for stirring. The stones sink to the bottom of the tank and are cleaned regularly. After the slurry is made in a high-concentration stirring tank, it is pumped to the vibrating screen to screen out weeds, debris, pebbles and carbon particles. The size of the strong scrubbing and stirring tank is Φ2000mm×2000mm, the size of the high-concentration stirring tank is Φ2000mm×2000mm, and the double-layer linear vibrating screen model is 2ZS1230, with the size of the upper layer 5mm and the lower layer 1.5mm; (3) After screening and impurity removal, the slurry enters the first stage hydrocyclone for a first stage classification operation. The first stage classification sand settling enters the grinding operation. The grinding operation product returns to the first stage classification hydrocyclone. The first stage classification overflow (fineness is -325 mesh 71%) enters the second stage hydrocyclone. The first stage hydrocyclone specification is FX350-12, the ball mill specification is MQY type Φ2700mm×3600mm, and the second stage hydrocyclone specification is FX200-18; (4) The overflow from the second-stage classification operation (fineness of -325 mesh 86%) is returned to the first-stage classification, and the sand settling from the second-stage classification (concentration of 39.7%) enters the conventional carbon leaching process (CIL). The carbon leaching tailings enter the filter press workshop, are dehydrated by the box filter press, and are dry-discharged to the tailings pond, and the filtrate is returned for use. The gold-loaded carbon produced by carbon leaching enters the activated carbon desorption, precious liquid separation, electrolytic deposition, smelting and other processes to produce 98.8% gold.

[0025] Embodiment 5: The embodiment of the present invention discloses a pulping process suitable for comprehensive utilization of gold tailings pond resources, comprising the following steps: (1) Gold tailings (which may agglomerate or freeze in winter) with a particle size of -200 mesh 80% and a gold grade of 1.00 g / t containing a certain amount of stones, weeds, debris and carbon particles are crushed using a 2PG-100CT double-toothed roller crusher; (2) After crushing, the material is added with water and flows into a strong scrubbing and stirring tank for stirring. The stones sink to the bottom of the tank and are cleaned regularly. After the slurry is made in a high-concentration stirring tank, it is pumped to the vibrating screen to screen out weeds, debris, pebbles and carbon particles. The size of the strong scrubbing and stirring tank is Φ2000mm×2000mm, the size of the high-concentration stirring tank is Φ2000mm×2000mm, and the double-layer linear vibrating screen model is 2ZS1230, with the size of the upper layer 5mm and the lower layer 1.5mm; (3) After screening and impurity removal, the slurry enters the first stage hydrocyclone for a first stage classification operation. The first stage classification sand settling enters the grinding operation. The grinding operation product returns to the first stage classification hydrocyclone. The first stage classification overflow (fineness is -325 mesh 70%) enters the second stage hydrocyclone. The first stage hydrocyclone specification is FX350-12, the ball mill specification is MQY type Φ2700mm×3600mm, and the second stage hydrocyclone specification is FX200-18; (4) The overflow from the second stage classification operation (fineness is -325 mesh 85%) is returned to the first stage classification, and the sand settling from the second stage classification (concentration is 41.9%) enters the conventional carbon leaching process (CIL). The carbon leaching tailings enter the filter press workshop, are dehydrated by the box filter press, and are dry-discharged to the tailings pond, and the filtrate is returned for use. The gold-loaded carbon produced by carbon leaching enters the activated carbon desorption, precious liquid separation, electrolytic deposition, smelting and other processes to produce 99.2% gold.

[0026] Embodiment 6: The embodiment of the present invention discloses a pulping process suitable for comprehensive utilization of gold tailings pond resources, comprising the following steps: (1) Gold tailings (which may agglomerate and freeze in winter) with a particle size of -200 mesh 80% and a gold grade of 0.77 g / t containing a certain amount of stones, weeds, debris and carbon particles were crushed using a 2PG-100CT double-toothed roller crusher; (2) After crushing, the material is added with water and flows into a strong scrubbing and stirring tank for stirring. The stones sink to the bottom of the tank and are cleaned regularly. After the slurry is made in a high-concentration stirring tank, it is pumped to the vibrating screen to screen out weeds, debris, pebbles and carbon particles. The size of the strong scrubbing and stirring tank is Φ2000mm×2000mm, the size of the high-concentration stirring tank is Φ2000mm×2000mm, and the double-layer linear vibrating screen model is 2ZS1230, with the size of the upper layer 5mm and the lower layer 1.5mm; (3) After screening and impurity removal, the slurry enters the first stage hydrocyclone for a first stage classification operation. The first stage classification sand settling enters the grinding operation. The grinding operation product returns to the first stage classification hydrocyclone. The first stage classification overflow (fineness is -325 mesh 74%) enters the second stage hydrocyclone. The first stage hydrocyclone specification is FX350-12, the ball mill specification is MQY type Φ2700mm×3600mm, and the second stage hydrocyclone specification is FX200-18; (4) The overflow from the second-stage classification operation (fineness of -325 mesh 87%) is returned to the first-stage classification, and the sand settling from the second-stage classification (concentration of 40%) enters the conventional carbon leaching process (CIL). The carbon leaching tailings enter the filter press workshop, are dehydrated by the box filter press, and are dry-discharged to the tailings pond, and the filtrate is returned for use. The gold-loaded carbon produced by carbon leaching enters the activated carbon desorption, precious liquid separation, electrolytic deposition, smelting and other processes to produce 97.1% gold.

Claims

1. A pulping process suitable for comprehensive utilization of gold tailings pond resources, characterized in that: The following steps are involved: S1, crushing gold tailings containing stones, weeds, debris and carbon particles; S2, adding water to the crushed material in step S1 and flowing it into a strong scrubbing and stirring tank for stirring; wherein the stones sink to the bottom of the tank and are cleaned regularly, and the slurry is made in a high-concentration stirring tank and then pumped to a double-layer linear vibrating screen to screen out weeds, debris, pebbles and carbon particles; S3, the slurry after screening and impurity removal in step S2 enters the first stage hydrocyclone for a first stage classification operation, the first stage classification sand settling enters the MQY ball mill for grinding operation, the grinding operation product returns to the first stage classification hydrocyclone, and the first stage classification overflow enters the second stage hydrocyclone; S4, the overflow of the first stage classification in step S3 enters the second stage hydrocyclone for second stage classification operation, the overflow of the second stage classification operation returns to the first stage hydrocyclone for first stage classification, and the second stage classification sedimentation enters the cyanide leaching operation; S5, the sediment after the cyanide leaching operation in step S4 enters the carbon leaching process, the carbon leaching tailings enter the filter press workshop, are dehydrated by the box filter press and then dry-discharged to the tailings pond, and the filtrate is returned for use; the gold-loaded carbon product of the carbon leaching enters the activated carbon desorption, precious liquid separation, electrolysis, and smelting to produce gold.

2. A pulping process suitable for comprehensive utilization of gold tailings pond resources according to claim 1, characterized in that: In the step S1, the selected gold tailings are gold tailings with a carbon particle size of -200 mesh 80% and a gold grade of 0.6g / t-1.0g / t; wherein the crushing is performed using a 2PG-100CT double-toothed roller crusher.

3. A pulping process suitable for comprehensive utilization of gold tailings pond resources according to claim 1, characterized in that: In the step S2, the size of the strong scrubbing stirring tank is Φ2000mm×2000mm; the size of the high concentration stirring tank is Φ2000mm×2000mm; the double-layer linear vibrating screen is model 2ZS1230, with the size of the upper layer 5mm and the lower layer 1.5mm.

4. A pulping process suitable for comprehensive utilization of gold tailings pond resources according to claim 1, characterized in that: In step S3, the specification of the first-stage hydrocyclone is FX350-12, and the overflow particle size is -325 mesh 70%-75%; the size of the MQY ball mill is Φ2700mm×3600mm; the specification of the second-stage hydrocyclone is FX200-18, and the overflow particle size is -325 mesh 85%-90%.

5. The pulping process for comprehensive utilization of gold tailings pond resources according to claim 1, characterized in that: In step S4, the concentration of the second-stage classified sand settling is 40%±2%.

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