阅读说明：本技术 一种循环式堆浸提金制备工艺 (Circulating heap leaching gold extraction preparation process ) 是由 白杨 邢成军 李强 孟庆秋 李冠华 苗腾飞 于 2021-08-25 设计创作，主要内容包括：本发明涉及一种循环式堆浸提金制备工艺,涉及堆浸提金技术领域,包括,步骤S1,根据矿石密度将矿石通过矿石破碎机进行破碎,并通过过滤网对破碎后的矿石进行过滤,以精确控制矿石粒径；步骤S2,将过滤后的矿石进行筑堆形成矿石堆,并检查矿石堆的渗透性；步骤S3,向所述矿石堆顶部循环喷淋氰化钠溶液并堆浸预设时间；步骤S4,收集堆浸液以提取矿石中浸出的金属；在向所述矿石堆喷淋氰化钠溶液时,根据获取的矿石密度P设置溶液浓度,在设置溶液浓度时,根据调节后的矿石的筑堆高度对设置的溶液浓度进行调节,调节完成后,根据喷淋器的喷淋强度F对调节后的溶液浓度Qi’进行修正。本发明有效提高了对矿石中金属的提取效率。(The invention relates to a circulating heap leaching gold extraction preparation process, which relates to the technical field of heap leaching gold extraction, and comprises the following steps of S1, crushing ores through an ore crusher according to ore density, and filtering the crushed ores through a filter screen to accurately control the particle size of the ores; step S2, stacking the filtered ores to form an ore heap, and checking the permeability of the ore heap; step S3, circularly spraying a sodium cyanide solution to the top of the ore heap and heap leaching for a preset time; step S4, collecting heap leaching liquid to extract leached metal in the ore; and when the solution concentration is set, the set solution concentration is adjusted according to the stacking height of the adjusted ore, and after the adjustment is finished, the adjusted solution concentration Qi' is corrected according to the spraying intensity F of the sprayer. The invention effectively improves the extraction efficiency of the metal in the ore.)

1. A cyclic heap leaching gold extraction preparation process is characterized by comprising the following steps:

step S1, crushing the ore through an ore crusher according to the ore density, and filtering the crushed ore through a filter screen to accurately control the ore particle size;

step S2, stacking the filtered ores to form an ore heap, and checking the permeability of the ore heap;

step S3, circularly spraying a sodium cyanide solution to the top of the ore heap and heap leaching for a preset time;

step S4, collecting heap leaching liquid to extract leached metal in the ore;

in the steps S1-S2, when the ore is filtered by the filter screen, the aperture of the filter screen is set according to the detected ore density P, when the filtered ore is piled, the piling height of the ore is controlled according to the set aperture of the filter screen, after the piling of the filtered ore is completed, the permeation efficiency of the ore pile is judged according to the permeation time T of clear water in the ore pile, and if the permeation time T of the clear water is not satisfactory, the piling height of the filtered ore is adjusted according to the permeation time T of the clear water;

in step S3, the concentration of the sodium cyanide solution is set according to the acquired ore density P when the sodium cyanide solution is sprayed to the ore heap, the set concentration of the sodium cyanide solution is adjusted according to the heap height of the adjusted ore when the concentration of the sodium cyanide solution is set, and the adjusted concentration of the sodium cyanide solution Qi' is corrected according to the spray intensity F of the sprayer after the adjustment is completed.

2. The cyclic heap leaching gold preparation process according to claim 1, wherein, when setting the aperture of the filter screen, first, an ore density P is obtained by detection, and the obtained ore density P is compared with a preset ore density P0, and the aperture of the filter screen is set according to the comparison result, wherein,

when P is not more than P0, setting the aperture of the filter screen to be A1, wherein A1 is a preset value;

when P > P0, the aperture of the filter screen is set to a2, and a2 is set to a1 × [1- (P-P0)/P ].

3. The cyclic heap leaching gold preparation process according to claim 2, wherein, when the ore heap height is set, the set filter mesh aperture Ai is compared with a preset filter mesh aperture A0, and the ore heap height is controlled according to the comparison result, wherein,

when Ai is less than or equal to A0, setting the stacking height of the ore as H1;

when Ai is larger than A0, setting the stacking height of the ore as H2;

wherein H1 is the first preset stacking height, H2 is the second preset stacking height, and H1 is less than H2.

4. The cyclic heap leaching gold extraction process according to claim 3, wherein when the permeability efficiency of the ore heap is judged, the spray thrower sprays clean water to the top of the heap at a preset spray intensity, and records the permeability time T of the clean water, and compares the obtained permeability time T of the clean water with each preset permeability time, and judges the permeability efficiency of the ore heap according to the comparison result, wherein,

when T is less than T1, judging that the permeation speed of the ore heap is too high and the ore heap does not meet the requirement;

when T is more than or equal to T1 and less than or equal to T2, judging that the permeation speed of the ore heap meets the requirement;

when T is larger than T2, judging that the permeation speed of the ore heap is too low and the ore heap does not meet the requirement;

wherein T1 is the first preset penetration time, T2 is the second preset penetration time, and T1 is less than T2.

5. The cyclic heap leaching gold preparation process according to claim 4, wherein when the permeation rate is judged to be unsatisfactory, the heap height Hi of the filtered ore is adjusted according to the permeation time T of the clean water, and i is set to 1,2, wherein,

when the permeation speed of the ore heap is judged to be too high, the stacking height of the ore is adjusted to be H3, and H3 is set as Hi x [1+ (T1-T)/T1 ];

when the permeation rate of the ore heap is determined to be too slow, the heap height of the ore is adjusted to H4, and H4 is set to Hi × [1- (T-T2)/T ].

6. The cyclic heap leach gold preparation process according to claim 5, wherein, when spraying NaCN solution to the ore heap and setting the solution concentration, the obtained ore density P is compared with a preset ore density P0, and the solution concentration is set according to the comparison result, wherein,

when P is less than or equal to P0, setting the solution concentration of the sodium cyanide solution to be Q1;

when P > P0, setting the solution concentration of the NaCN solution to Q2;

wherein Q1 is the first preset solution concentration, Q2 is the second preset solution concentration, and Q1 is less than Q2.

7. The cyclic heap leaching gold preparation process according to claim 6, wherein when the solution concentration is adjusted, the adjusted heap height Hj of the ore is compared with a preset standard heap height H0, j is set to 1,2,3,4, and a corresponding adjustment coefficient is selected according to the comparison result to adjust the set solution concentration Qi, i is set to 1,2,

when the kth adjusting coefficient ak is selected to adjust the solution concentration Qi, k is set to 1,2, and the adjusted solution concentration is Qi ', Qi' is set to Qi × ak, wherein,

when the Hj is not more than H0, selecting a first adjusting coefficient a1 to adjust Qi, wherein a1 is a preset value, and a1 is more than 1 and less than 1.2;

when Hj > H0, selecting a second adjustment coefficient a2 to adjust Qi, and setting a2 to a1 × [1+ (Hj-H0)/Hj ].

8. The cyclic heap leaching gold preparation process according to claim 7, wherein, when the adjusted solution concentration Qi 'is corrected, the spray intensity F of the sprayer is compared with a preset standard spray intensity F0, and the adjusted solution concentration Qi' is corrected according to the comparison result, wherein,

when F < F0, the spray intensity of the sprayer is judged to be weak, and the solution concentration is corrected to Qi ", and Qi" is set to Qi' × [1+ (F0-F)/F0 ];

and when F is larger than or equal to F0, judging that the spraying strength of the sprayer meets the requirement, and not correcting the solution concentration.

Technical Field

The invention relates to the technical field of heap leaching gold extraction, in particular to a circulating heap leaching gold extraction preparation process.

Background

Heap leaching is a process in which a heap of ore is sprayed with a leaching solution to selectively leach out the valuable components of the ore during the downward infiltration process, and the valuable components are recovered from the pregnant solution flowing out of the bottom of the heap. According to different ore grades, the method can be divided into ore heap leaching and waste rock heap leaching; depending on the location of the yard, there are categories of surface heap leaching and underground heap leaching. The heap leaching method is mainly applied to the mining of copper ores, uranium ores, gold ores and silver ores and the treatment of smelting plant slag and dressing plant tailings containing used components.

In the prior art, when the heap leaching method is adopted for metallurgy, the reaction process of the ore and the reactant cannot be accurately controlled, so that the extraction efficiency of the metal in the ore is reduced.

Disclosure of Invention

Therefore, the invention provides a circulating type heap leaching gold extraction preparation process, which is used for solving the problem of low metal extraction efficiency caused by the fact that the reaction process of ores and reactants cannot be accurately controlled according to ore parameters in the prior art.

In order to achieve the purpose, the invention provides a cyclic heap leaching gold extraction preparation process, which comprises the following steps:

step S1, crushing the ore through an ore crusher according to the ore density, and filtering the crushed ore through a filter screen to accurately control the ore particle size;

step S2, stacking the filtered ores to form an ore heap, and checking the permeability of the ore heap;

step S3, circularly spraying a sodium cyanide solution to the top of the ore heap and heap leaching for a preset time;

step S4, collecting heap leaching liquid to extract leached metal in the ore;

in the steps S1-S2, when the ore is filtered by the filter screen, the aperture of the filter screen is set according to the detected ore density P, when the filtered ore is piled, the piling height of the ore is controlled according to the set aperture of the filter screen, after the piling of the filtered ore is completed, the permeation efficiency of the ore pile is judged according to the permeation time T of clear water in the ore pile, and if the permeation time T of the clear water is not satisfactory, the piling height of the filtered ore is adjusted according to the permeation time T of the clear water;

in step S3, the concentration of the sodium cyanide solution is set according to the acquired ore density P when the sodium cyanide solution is sprayed to the ore heap, the set concentration of the sodium cyanide solution is adjusted according to the heap height of the adjusted ore when the concentration of the sodium cyanide solution is set, and the adjusted concentration of the sodium cyanide solution Qi' is corrected according to the spray intensity F of the sprayer after the adjustment is completed.

Further, when the aperture of the filter screen is set, firstly, the ore density P is obtained through detection, the obtained ore density P is compared with the preset ore density P0, and the aperture of the filter screen is set according to the comparison result, wherein,

when P is not more than P0, setting the aperture of the filter screen to be A1, wherein A1 is a preset value;

when P > P0, the aperture of the filter screen is set to a2, and a2 is set to a1 × [1- (P-P0)/P ].

Further, when the ore stacking height is set, the aperture Ai of the set filter screen is compared with the aperture A0 of the preset filter screen, and the ore stacking height is controlled according to the comparison result, wherein,

when Ai is less than or equal to A0, setting the stacking height of the ore as H1;

when Ai is larger than A0, setting the stacking height of the ore as H2;

wherein H1 is the first preset stacking height, H2 is the second preset stacking height, and H1 is less than H2.

Further, when the permeability efficiency of the ore heap is judged, the clear water is sprayed to the top of the heap by the sprayer with preset spraying intensity, the permeability time T of the clear water is recorded, the obtained permeability time T of the clear water is compared with each preset permeability time, and the permeability efficiency of the ore heap is judged according to the comparison result, wherein,

when T is less than T1, judging that the permeation speed of the ore heap is too high and the ore heap does not meet the requirement;

when T is more than or equal to T1 and less than or equal to T2, judging that the permeation speed of the ore heap meets the requirement;

when T is larger than T2, judging that the permeation speed of the ore heap is too low and the ore heap does not meet the requirement;

wherein T1 is the first preset penetration time, T2 is the second preset penetration time, and T1 is less than T2.

Further, when the permeation speed is judged not to meet the requirement, the stacking height Hi of the filtered ore is adjusted according to the permeation time T of the clean water, and i is set to be 1 and 2, wherein,

when the permeation speed of the ore heap is judged to be too high, the stacking height of the ore is adjusted to be H3, and H3 is set as Hi x [1+ (T1-T)/T1 ];

when the permeation rate of the ore heap is determined to be too slow, the heap height of the ore is adjusted to H4, and H4 is set to Hi × [1- (T-T2)/T ].

Further, when spraying a sodium cyanide solution to the ore heap and setting a solution concentration, comparing the obtained ore density P with a preset ore density P0, and setting a solution concentration according to the comparison result, wherein,

when P is less than or equal to P0, setting the solution concentration of the sodium cyanide solution to be Q1;

when P > P0, setting the solution concentration of the NaCN solution to Q2;

wherein Q1 is the first preset solution concentration, Q2 is the second preset solution concentration, and Q1 is less than Q2.

Further, when the solution concentration is adjusted, the adjusted stacking height Hj of the ore is compared with a preset standard stacking height H0, j is set to be 1,2,3 and 4, a corresponding adjusting coefficient is selected according to the comparison result to adjust the set solution concentration Qi, i is set to be 1 and 2,

when the kth adjusting coefficient ak is selected to adjust the solution concentration Qi, k is set to 1,2, and the adjusted solution concentration is Qi ', Qi' is set to Qi × ak, wherein,

when the Hj is not more than H0, selecting a first adjusting coefficient a1 to adjust Qi, wherein a1 is a preset value, and a1 is more than 1 and less than 1.2;

when Hj > H0, selecting a second adjustment coefficient a2 to adjust Qi, and setting a2 to a1 × [1+ (Hj-H0)/Hj ].

Further, when the adjusted solution concentration Qi 'is corrected, the spraying intensity F of the sprayer is compared with the preset standard spraying intensity F0, and the adjusted solution concentration Qi' is corrected according to the comparison result, wherein,

when F < F0, the spray intensity of the sprayer is judged to be weak, and the solution concentration is corrected to Qi ", and Qi" is set to Qi' × [1+ (F0-F)/F0 ];

and when F is larger than or equal to F0, judging that the spraying strength of the sprayer meets the requirement, and not correcting the solution concentration.

Compared with the prior art, the method has the beneficial effects that when the aperture of the filter screen is controlled, the aperture of the filter screen is controlled by obtaining the density of the ore, the larger the density of the ore is, the larger the gold content of the ore is, therefore, when the aperture of the filter screen is set, the larger the density is, the smaller the corresponding aperture is, when the density of the ore is smaller than or equal to a preset value, the same aperture is used for filtering, and when the density of the ore is larger than the preset value, the size of the aperture is set according to the difference value, so that the requirement after the ore with different densities is crushed is met; when filtered ores are piled, the bottom area of the piled ores is guaranteed to be unchanged, the height of the piled ores is set according to the aperture of the filter screen, the larger the aperture is, the larger the volume of the filtered ores is, and the larger the volume of the monomer ores is, the higher the infiltration speed of the piled ores is, in order to guarantee the infiltration efficiency of the piled ores, the larger the aperture is, the higher the height of the piled ores is, the invention effectively improves the infiltration efficiency of the ores with different particle sizes by setting two different heights of the piled ores, thereby improving the gold extraction efficiency of the ores; according to the invention, after filtered ores are piled for the first time to form an ore pile, clear water is sprayed to the ore pile to obtain the permeation speed of the ore pile, whether the permeation efficiency of the ore pile meets the requirement is judged according to the permeation speed, the permeation efficiency influences the extraction efficiency of metals in the ores, if the permeation efficiency does not meet the requirement, the piling height of the ore pile is adjusted according to the detected permeation time, the piling height is reduced when the permeation speed is too slow, the piling height is increased when the permeation speed is too fast, the permeation efficiency is judged according to the permeation time of the clear water, and the piling height of the ores is adjusted through the permeation time, so that the influence of different piling heights on the permeation efficiency of the ore pile can be effectively avoided, and the extraction efficiency of the metals in the ores is improved; when the sodium cyanide solution is sprayed on the ore heap, the concentration of the solution is set according to the density of the ore, the higher the density of the ore is, the higher the concentration of the required solution is, so that the spraying on the ore heap can meet the leaching requirement of the metal in the ore, and the extraction efficiency of the metal in the ore is improved.

Especially, through comparing the setting with the ore density P who obtains and preset ore density P0 the aperture of filter screen has effectively guaranteed to accord with the heap ore requirement of building through filterable ore to further improve the extraction efficiency to metal in the ore.

Especially, the height of ore piling is controlled by comparing the aperture Ai of the set filter screen with the aperture A0 of the preset filter screen, so that the accuracy of the height of ore piling is effectively ensured, and the extraction efficiency of metal in ore is further improved.

Particularly, the permeation efficiency of the ore heap is judged by comparing the obtained permeation time T of the clear water with each preset permeation time, so that the accuracy of judgment of the permeation efficiency is effectively guaranteed, the accuracy of adjustment of the stacking height of the ore is improved, and the extraction efficiency of the metal in the ore is further improved.

Especially, through comparing the ore density P who obtains and preset ore density P0 and setting solution concentration, effectively guaranteed that solution concentration satisfies the heap leaching demand to further improve the extraction efficiency to metal in the ore.

Particularly, the stacking height Hj of the adjusted ore is compared with the preset standard stacking height H0, the corresponding adjusting coefficient is selected to adjust the set solution concentration Qi, the solution concentration is further guaranteed to meet the requirement of heap leaching, and therefore the extraction efficiency of metal in the ore is further improved.

Particularly, the adjusted solution concentration Qi' is corrected by comparing the spraying intensity F of the sprayer with the preset standard spraying intensity F0, so that the solution concentration is further ensured to meet the heap leaching requirement, and the extraction efficiency of the metal in the ore is further improved.

Drawings

FIG. 1 is a schematic flow chart of a cyclic heap leaching gold preparation process according to this embodiment.

Detailed Description

In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1, a schematic flow chart of a cyclic heap leaching gold preparation process according to the present embodiment is shown, the process including:

step S1, crushing the ore through an ore crusher according to the ore density, and filtering the crushed ore through a filter screen to accurately control the ore particle size;

step S2, stacking the filtered ores to form an ore heap, and checking the permeability of the ore heap;

step S3, circularly spraying a sodium cyanide solution to the top of the ore heap and heap leaching for a preset time;

step S4, heap leachate is collected to extract leached metals from the ore.

Specifically, in step S1 of this embodiment, when the ore is filtered by the filter screen, first, the ore density P is obtained by detecting, and the obtained ore density P is compared with the preset ore density P0, and the aperture of the filter screen is set according to the comparison result, wherein,

when P is not more than P0, setting the aperture of the filter screen to be A1, wherein A1 is a preset value;

when P > P0, the aperture of the filter screen is set to a2, and a2 is set to a1 × [1- (P-P0)/P ].

Specifically, in the embodiment, when the crushed ore is filtered, the crushed ore is filtered through the filter screen, the filtered ore is piled up, and the ore which does not pass through the filter screen is crushed again by the ore crusher until the ore passes through the filter screen, meanwhile, in the embodiment, in controlling the aperture of the filter screen, the aperture of the filter screen is controlled by obtaining the density of the ore, the larger the density of the ore is, the larger the gold content is, therefore, when the aperture of the filter screen is set, the larger the density is, the smaller the corresponding aperture is, and when the ore density is less than or equal to a preset value, the same aperture is used for filtering, and when the ore density is greater than the preset value, the aperture is set according to a difference value, so as to ensure that the requirements after the ore with different densities are crushed are met, the embodiment filters the crushed ore through the filter screen, the crushing degree of the ore can be effectively controlled, and the filtered ore meets the stacking requirement, so that the gold extraction efficiency of the ore is improved.

Specifically, in step S2 of this embodiment, when stacking the filtered ore, the aperture Ai of the set filter screen is compared with the preset filter screen aperture a0, and the height of stacking the ore is controlled according to the comparison result,

when Ai is less than or equal to A0, setting the stacking height of the ore as H1;

when Ai is larger than A0, setting the stacking height of the ore as H2;

wherein H1 is the first preset stacking height, H2 is the second preset stacking height, and H1 is less than H2.

Particularly, this embodiment is when building the heap to the ore after filtering, the bottom area of guaranteeing to build the heap is unchangeable, the height of building the heap is set up to the aperture of filter screen, the aperture is big then the demonstration filtered ore volume is big more, and the volume of monomer ore is big its infiltration rate after building the heap is fast more, the infiltration efficiency of this embodiment for guaranteeing to build the heap, the aperture is big more then the heap height is high more, this embodiment is through setting up the heap height of two kinds of differences, the infiltration efficiency to different particle size ores has effectively been improved, thereby the improvement is to the gold extraction efficiency of ore. It can be understood that, this embodiment sets up when setting the heap height to the mode of predetermineeing the fixed value, can also set up heap height and filter screen aperture ratio to guarantee the infiltration efficiency after the heap.

Specifically, in this embodiment, after stacking filtered ores, clear water is sprayed to the top of the stacked ores at a preset spraying intensity by a sprayer, the permeation time T of the clear water is recorded, the obtained permeation time T of the clear water is compared with each preset permeation time, and the permeation efficiency of the ore stack is determined according to the comparison result, wherein,

when T is less than T1, judging that the permeation speed of the ore heap is too high and the ore heap does not meet the requirement;

when T is more than or equal to T1 and less than or equal to T2, judging that the permeation speed of the ore heap meets the requirement;

when T is larger than T2, judging that the permeation speed of the ore heap is too low and the ore heap does not meet the requirement;

wherein T1 is the first preset penetration time, T2 is the second preset penetration time, and T1 is less than T2.

Specifically, when the permeation rate is judged to be not satisfactory, the stacking height Hi of the filtered ore is adjusted according to the permeation time T of the clean water, and i is set to 1,2, wherein,

when the permeation speed of the ore heap is judged to be too high, the stacking height of the ore is adjusted to be H3, and H3 is set as Hi x [1+ (T1-T)/T1 ];

when the permeation rate of the ore heap is determined to be too slow, the heap height of the ore is adjusted to H4, and H4 is set to Hi × [1- (T-T2)/T ].

Specifically, after the stacking height of the ore is adjusted, the permeation efficiency of the ore stack is repeatedly judged until the permeation speed of the ore stack meets the requirement.

Particularly, this embodiment is after piling formation ore heap to the ore after filtering for the first time, through spraying the infiltration rate of clear water in order to obtain the ore heap to the ore heap, and whether the infiltration efficiency of judging the ore heap according to the infiltration rate meets the requirements, and the infiltration efficiency will influence the extraction efficiency to metal in the ore, if not meet the requirements then make the adjustment to the heap height of ore heap according to the infiltration time that detects, the infiltration rate then reduces the heap height when slow, the infiltration rate then increases the heap height when too fast, the infiltration time through the clear water makes the judgement to infiltration efficiency, rethread infiltration time makes the adjustment to the heap height of ore, can effectively avoid the influence of different heap heights to ore heap infiltration efficiency, thereby improve the extraction efficiency to metal in the ore. It can be understood that, the preset spraying strength is not specifically limited in this embodiment, and needs to be set in combination with actual spraying equipment, and meanwhile, when each preset penetration time is set, the preset spraying strength needs to be set as a standard, and when the preset spraying strength is larger, each preset penetration time should be smaller, so as to ensure the accuracy of judgment on the penetration rate.

Specifically, in step S3 of this embodiment, when spraying nacn solution onto the ore heap, the obtained ore density P is compared with a preset ore density P0, and the solution concentration is set according to the comparison result, wherein,

when P is less than or equal to P0, setting the solution concentration of the sodium cyanide solution to be Q1;

when P > P0, setting the solution concentration of the NaCN solution to Q2;

wherein Q1 is the first preset solution concentration, Q2 is the second preset solution concentration, and Q1 is less than Q2.

Specifically, in the present embodiment, when the solution concentration is set, the adjusted stacking height Hj of the ore is compared with the preset standard stacking height H0, and j is set to 1,2,3, and 4, and the corresponding adjustment coefficient is selected according to the comparison result to adjust the set solution concentration Qi, i is set to 1,2,

when the kth adjusting coefficient ak is selected to adjust the solution concentration Qi, k is set to 1,2, and the adjusted solution concentration is Qi ', Qi' is set to Qi × ak, wherein,

when the Hj is not more than H0, selecting a first adjusting coefficient a1 to adjust Qi, wherein a1 is a preset value, and a1 is more than 1 and less than 1.2;

when Hj > H0, selecting a second adjustment coefficient a2 to adjust Qi, and setting a2 to a1 × [1+ (Hj-H0)/Hj ].

Specifically, in this embodiment, after the solution concentration is adjusted, the spraying intensity F of the sprayer is compared with the preset standard spraying intensity F0, and the adjusted solution concentration Qi' is corrected according to the comparison result, wherein,

when F < F0, the spray intensity of the sprayer is judged to be weak, and the solution concentration is corrected to Qi ", and Qi" is set to Qi' × [1+ (F0-F)/F0 ];

and when F is larger than or equal to F0, judging that the spraying strength of the sprayer meets the requirement, and not correcting the solution concentration.

Specifically, in the embodiment, when spraying the sodium cyanide solution to the ore heap, the solution concentration is firstly set according to the ore density, and the higher the ore density is, the higher the required solution concentration is, so as to ensure that the spraying of the ore heap meets the leaching requirement of the metal in the ore, therefore, the extraction efficiency of the metal in the ore is improved, meanwhile, the solution concentration is adjusted according to the adjusted stacking height Hj of the ore, after the ore density is determined, the higher the pile height is, the higher the concentration of the required solution is, and by accurately adjusting the concentration of the solution, the leaching efficiency of the metal in the ore can be further improved, in the embodiment, the concentration of the solution is corrected according to the spraying strength of the sprayer after the concentration of the solution is adjusted, the spraying strength is smaller than the preset standard, the solution concentration is increased, and the extraction efficiency of the metal in the ore is further improved through correction.

Specifically, in step S4 of this embodiment, the heap-leaching solution may be introduced into a liquid collecting tank or other container when the heap-leaching solution is collected, and the metal in the heap-leaching solution may be extracted by adsorption using activated carbon when the collected heap-leaching solution is subjected to gold extraction.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.