Flocculant determination method and device, electronic equipment and medium

Abstract

The invention belongs to the technical field of mineral processing, and discloses a flocculant determination method and device, electronic equipment and a medium. The flocculant determination method is used for determining the type selection and dosage of a flocculant in a laterite-nickel ore hydrometallurgy process, and comprises the following steps: acquiring the pH value of ore pulp in a thickener and the potential value of the surface of ore pulp particles, and determining the type of the flocculant based on the pH value and the potential value; acquiring feeding ore pulp parameters and discharging ore pulp parameters of the thickener, and determining a first settling speed of ore pulp in the thickener after a flocculating agent is added and a second settling speed of the ore pulp in the thickener when the flocculating agent is not added based on the feeding ore pulp parameters and the discharging ore pulp parameters; and determining the dosage of the flocculating agent based on the first settling velocity and the second settling velocity. According to the method, the flocculating agent can be determined without manual trial and error or experience, so that the problems that an existing flocculating agent determination method is low in efficiency and prone to errors are solved, it is ensured that the effect of ore pulp after thickening can meet the expectation, and then the possibility of generating negative effects on metallurgical quality is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral processing, and in particular to a method, device, electronic equipment and medium for determining a flocculant. Background Art

[0002] The efficient thickening of slurry involves multiple application fields such as mineral processing, hydrometallurgy, and environmental governance. Its core principle is to use a thickener to settle and thicken materials such as ore slurry, post-reaction slurry, and waste water slurry to accelerate the solid-liquid separation process. In order to accelerate the sedimentation and separation of materials, flocculants are often required to be added during the thickening process. Their main function is to agglomerate the fine, difficult-to-sediment particles in the material through flocculation to form large flocs to accelerate the sedimentation of the material. The flocculation and sedimentation process is a dynamic, nonlinear process, which generally includes flocculation-splitting-reflocculation-re-splitting, etc. How to determine the type, dosage, flocculent sedimentation rate and other parameters of the flocculant plays a key role in the design of the thickener and the material processing efficiency. Therefore, how to scientifically and reasonably select the flocculant and determine its dosage has become an important topic in the thickening process.

[0003] The determination of flocculants includes the selection of types and dosages. At present, the selection of appropriate types of flocculants mainly depends on the experience of the staff, and the dosage is directly determined according to the actual amount of raw materials such as slurry. Especially in the hydrometallurgical process of laterite nickel ore, due to its continuous production characteristics, it often includes the thickening of the original ore slurry, the CCD (Counter-Current Decantation, countercurrent washing) washing and thickening separation of the slurry after leaching, the thickening separation of iron and aluminum slag in the iron and aluminum removal (impurity removal) stage, and the thickening separation of nickel and cobalt precipitation (MHP product preparation stage). Large thickeners are required for thickening separation. Relying on experience to determine the flocculant is not only inefficient, but also the effect after thickening is difficult to achieve the expected effect, which can easily have a negative impact on the metallurgical quality. Summary of the invention

[0004] The purpose of the present invention is to provide a flocculant determination method, device, electronic equipment and medium, which solves the problem that the determination of flocculants in the prior art mainly relies on experience, resulting in low efficiency and poor effect after concentration, which has a negative impact on metallurgical quality.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present application provides a flocculant determination method, which is used to determine the type and dosage of flocculants in a laterite nickel ore hydrometallurgical process, comprising:

[0007] Obtaining the pH value of the slurry in the thickener and the potential value of the surface of the slurry particles, and determining the type of flocculant based on the pH value and the potential value;

[0008] Obtaining the feed slurry parameters and the discharge slurry parameters of the thickener, and determining a first settling velocity of the slurry in the thickener after adding a flocculant and a second settling velocity when no flocculant is added based on the feed slurry parameters and the discharge slurry parameters;

[0009] A dosage of a flocculant is determined based on the first settling velocity and the second settling velocity.

[0010] Optionally, the feed slurry parameters include: feed slurry concentration C1 and feed slurry density ρ1; the discharge slurry parameters include: discharge slurry concentration C2, discharge slurry density ρ2 and discharge volume flow rate G; obtain the settling area S of the thickener;

[0011] The first sinking speed

[0012] Optionally, the feed slurry parameters further include the viscosity η of the feed slurry when it is not combined with a flocculant; obtaining the liquid phase density ρ0, the slurry density ρ3 and the average particle size d of the slurry;

[0013] The second sinking speed

[0014] Optionally, determining a dosage of a flocculant based on the first settling velocity and the second settling velocity comprises:

[0015] Based on the ratio of the first sedimentation velocity to the second sedimentation velocity, the concentration of the flocculant is determined, and the dosage of the flocculant in the liquid phase is obtained according to the concentration of the flocculant.

[0016] Optionally, determining the dosage of the flocculant based on the ratio of the first settling velocity to the second settling velocity and the concentration of the flocculant in the liquid phase comprises:

[0017] Based on the ratio of the first sinking velocity to the second sinking velocity k=v min / v a ,according to Determine the concentration C of the flocculant and determine the dosage of the flocculant based on the concentration C.

[0018] Optionally, determining the type of flocculant based on the pH value and the potential value comprises:

[0019] When the pH value is within the first preset pH range and the potential value is within the first preset potential range, the flocculant is non-ionic;

[0020] When the pH value is within the second preset pH range and the potential value is within the second preset potential range, the flocculant is anionic;

[0021] When the pH value is within the third preset pH range and the potential value is within the third preset potential range, the flocculant is a cationic type;

[0022] The pH value within the third preset pH range is greater than the pH value within the first preset pH range and the pH value within the second preset pH range;

[0023] The potential value within the first preset potential range is greater than the potential value within the third preset potential range.

[0024] Optionally, the lower limit value of the second preset pH range is smaller than the lower limit value of the first preset pH range, and the upper limit value of the second preset pH range is equal to the upper limit value of the first preset pH range.

[0025] In a second aspect, the present application provides a flocculant determination device, which is used to determine the type and dosage of flocculants in a laterite nickel ore hydrometallurgical process, comprising:

[0026] A selection module, used for obtaining the pH value of the thickener and the potential value of the surface of the slurry particles, and determining the type of flocculant based on the pH value and the potential value;

[0027] A settling speed calculation module, used to obtain the feed slurry parameters and the discharge slurry parameters of the thickener, and determine the first settling speed of the slurry in the thickener after adding the flocculant and the second settling speed when the flocculant is not added based on the feed slurry parameters and the discharge slurry parameters;

[0028] A dosage calculation module is used to determine the dosage of the flocculant based on the first settling velocity and the second settling velocity.

[0029] In a third aspect, the present application also provides an electronic device comprising a memory and a processor, wherein the memory is used to store programs; the processor is coupled to the memory and is used to execute the program stored in the memory to implement the steps of the flocculant selection method as described in any one of the first aspects.

[0030] In a fourth aspect, the present application further provides a non-transitory computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of the flocculant selection method as described in any one of the first aspects are implemented.

[0031] Beneficial effects of the present invention:

[0032] The flocculant determination method, device, electronic device and medium provided by the present application are that when the surface of the slurry particles is charged, different particles cannot approach each other due to electrostatic repulsion and hydration, resulting in slow particle sedimentation and difficulty in compression during sedimentation and separation, low underflow concentration, and high turbidity of the supernatant. At this time, according to the pH value and potential value of the slurry, a flocculant with a different charge from the slurry is selected for addition, so that a strong charge attraction and agglomeration can occur between the flocculant molecules and the particles. When the charge on the surface of the slurry particles is completely neutralized, the electrostatic repulsion between the particles is gradually reduced to the point of disappearing, which is conducive to the aggregation of slurry particles and accelerates the slurry sedimentation.

[0033] In addition, the purpose of adding flocculants is to ensure that the settling rate of the slurry can meet the operational requirements. As the flocculants are added, the settling rate of the slurry changes, and the dosage of the flocculant can be accurately determined by the first settling rate and the second settling rate. Therefore, after the method provided in the present application determines the type of flocculant by collecting the pH value and potential value of the slurry, the dosage of the flocculant can be accurately determined according to the first settling rate and the second settling rate. The entire process can be completed quickly and automatically by the corresponding program, without the need for manual trial and error or experience to determine, thereby solving the problem that the existing flocculant determination method is inefficient and prone to error, ensuring that the effect of the slurry after thickening can meet expectations, thereby effectively reducing the possibility of negative impact on metallurgical quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A flow chart of an embodiment of a method for determining flocculant selection and dosage in a laterite nickel ore hydrometallurgical process provided in the present application;

[0035] Figure 2 A flow chart for determining the type of flocculant based on the first slurry parameter provided in this application;

[0036] Figure 3 A principle block diagram of an embodiment of a device for determining flocculant selection and dosage in a laterite nickel ore hydrometallurgical process provided by the present application;

[0037] Figure 4 A schematic diagram of the structure of an embodiment of an electronic device provided in this application.

[0038] In the figure:

[0039] 300. Flocculant determination device; 301. Selection module; 302. Settling speed calculation module; 303. Dosage calculation module; 400. Electronic device; 401. Processor; 402. Memory; 403. Display. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0044] The embodiments of the present application disclose a method, device, electronic equipment and medium for determining a flocculant.

[0045] like Figure 1 As shown, the flocculant determination method is applied to the laterite nickel ore hydrometallurgical process, which includes:

[0046] S101, obtaining the pH value of the slurry in the thickener and the potential value of the surface of the slurry particles, and determining the type of flocculant based on the pH value and the potential value.

[0047] The pH value will directly affect the hydrolysis rate of the flocculant, the existence form and performance of the hydrolysis product, and thus affect the precipitation effect. According to different pH ranges, the type of flocculant can be preliminarily determined. The effect of potential on the flocculation effect is mainly reflected in the neutralization and adsorption of charges. When the surface of the slurry particles is charged, different particles cannot approach each other due to electrostatic repulsion and hydration, resulting in slow particle sedimentation and difficulty in compression during sedimentation and separation, low bottom flow concentration, and high turbidity of the supernatant. At this time, adding a flocculant with a different charge from the slurry allows strong charge attraction and agglomeration between the flocculant molecules and the particles. When the charge on the surface of the slurry particles is completely neutralized, the electrostatic repulsion between the particles gradually decreases to the point of disappearing, which is conducive to the aggregation of slurry particles and accelerates the sedimentation of the slurry. Therefore, the appropriate type of flocculant can be selected according to the pH value and potential value of the slurry itself, and both the pH value and potential value can be directly measured using relevant equipment in the prior art. It should be understood that the ore pulp in this embodiment can be replaced by materials that can be used in a concentrator, such as post-reaction slurry, waste water slurry, etc. The principles for determining the flocculant during the concentration of the material in the concentrator are similar and are not listed here one by one.

[0048] S102, obtaining feed slurry parameters and discharge slurry parameters of the thickener, and determining a first settling velocity of the slurry in the thickener after adding a flocculant and a second settling velocity when no flocculant is added based on the feed slurry parameters and the discharge slurry parameters.

[0049] Feed slurry parameters refer to the various parameters of the slurry when it is injected into the thickener, including concentration, density, etc., while discharge slurry parameters refer to the parameters that the thickener is expected to achieve after adding flocculants at a set dosage. In other words, the discharge slurry parameters are the target parameters that the discharge slurry is intended to achieve. At the same time, at least two experimental groups are set up, one group does not add flocculants, and the other groups add flocculants with different parameters. The first and second settling rates are obtained based on the parameters obtained from multiple experimental groups. The settling rate refers to the amount of slurry sedimented per unit time.

[0050] S103. Determine the dosage of the flocculant based on the first settling velocity and the second settling velocity.

[0051] The first sedimentation velocity represents the sedimentation effect after the flocculant is added, while the second sedimentation velocity represents the sedimentation effect when the flocculant is not added. After obtaining multiple first sedimentation velocities, they can be compared with the second sedimentation velocities respectively. After determining the type of flocculant, the dosage of flocculant that needs to be added to the slurry during the thickening operation can be accurately obtained.

[0052] Through the above steps S101 to S103, the type of flocculant can be determined according to the pH value and potential value of the slurry itself, and the dosage of the flocculant can be determined according to the first settling velocity and the second settling velocity, so that the type and dosage of the flocculant are no longer determined solely by the experience of the staff, which effectively improves the efficiency and accuracy of flocculant determination, and the dosage of the flocculant is quickly and accurately calculated based on the first settling velocity and the second settling velocity, which can more accurately control the dosage of the flocculant, and no longer needs to be determined manually through trial and error or experience, thereby ensuring that the thickening effect can meet the discharge slurry parameters and meet expectations, thereby ensuring that the laterite nickel ore hydrometallurgical process can be successfully completed, and effectively reducing the possibility of negative impact on metallurgical quality.

[0053] In some embodiments, Figure 2 As shown, determining the type of flocculant based on the first slurry parameter includes:

[0054] S201, when the pH value is within the first preset pH range and the potential value is within the first preset potential range, a non-ionic flocculant is used;

[0055] S202, when the pH value is within the second preset pH range and the potential value is within the second preset potential range, the flocculant is anionic;

[0056] S203, when the pH value is within the third preset pH range and the potential value is within the third preset potential range, a cationic flocculant is used;

[0057] Among them, the pH value within the third preset pH range is greater than the pH value within the first preset pH range and the pH value within the second preset pH range; the potential value within the second preset potential range is greater than the potential value within the first preset potential range; the potential value within the first preset potential range is greater than the potential value within the third preset potential range.

[0058] In some embodiments, the lower limit value of the second preset pH range is less than the lower limit value of the first preset pH range, and the upper limit value of the second preset pH range is equal to the upper limit value of the first preset pH range.

[0059] Specifically, the pH value of the first preset pH range is neutral, which can be 6 to 8, and the surface of the slurry particles in the first preset charge range is almost uncharged (Zeta point potential -5mV to 5mV). Non-ionic PAM (Polyacrylamide) is selected as a flocculant, which can exhibit stable flocculation performance, is not affected by pH fluctuations, and has a low ionicity and will not introduce additional ions, thereby ensuring stability during the precipitation process.

[0060] The second preset pH range can be 2 to 8. The surface of the slurry particles in the second preset charge range is positively charged (Zeta point potential > 5mV). Anionic PAM is selected as a flocculant, which can effectively neutralize the charge on the surface of the suspended particles and reduce the repulsive force between the particles, thereby achieving a better precipitation effect.

[0061] The pH of the third preset pH range is greater than 8, and the surface of the slurry particles in the third preset charge range is negatively charged (Zeta point potential <-5mV). Cationic PAM is selected as a flocculant, which can effectively combine with the charged suspended particles to form stable flocs.

[0062] In some embodiments, the feed slurry concentration C1 and the feed slurry density ρ1; the discharge slurry parameters include: the discharge slurry concentration C2, the discharge slurry density ρ2 and the discharge volume flow rate G; the settling area S of the thickener is obtained; the first settling velocity

[0063] Specifically, after determining the type of flocculant, it becomes an important issue to determine how much flocculant to add to achieve the best effect. The core purpose of adding flocculants is to increase the settling rate of the slurry. In a given thickener, in order to achieve the target discharge concentration and flow rate, after testing and obtaining C1, ρ1 and S, and setting C2, ρ2, G, the first settling rate must satisfy the following relationship: The sedimentation rate of the slurry after adding the flocculant can be obtained.

[0064] In some embodiments, the feed slurry parameters also include the viscosity η of the feed slurry when it is not combined with the flocculant; obtaining the liquid phase density ρ0, the slurry density ρ3 and the average particle size d of the slurry; the second sedimentation velocity

[0065] It can be understood that for a given slurry, when no flocculant is added, ρ0, ρ3, and d can all be directly detected. According to the second sinking speed v a The sedimentation state of the slurry without adding flocculant can be determined, where g represents gravity.

[0066] In some embodiments, the dosage of the flocculant is determined based on the first settling velocity and the second settling velocity, including: determining the concentration of the flocculant based on the ratio of the first settling velocity to the second settling velocity, and deriving the dosage of the flocculant in the liquid phase according to the concentration of the flocculant.

[0067] Specifically, the ratio of the first sedimentation velocity to the second sedimentation velocity can intuitively reflect the improvement of the sedimentation effect after adding the selected flocculant, and the dosage of the flocculant can be determined according to the ratio.

[0068] In some embodiments, the dosage of the flocculant is determined based on the ratio of the first settling velocity to the second settling velocity and the concentration of the flocculant in the liquid phase, including: based on the ratio of the first settling velocity to the second settling velocity k=v min / v a ,according to Determine the concentration C of the flocculant and determine the dosage of the flocculant based on the concentration C.

[0069] It can be understood that with the addition of flocculants, the settling rate of the slurry changes. At this time, the settling rate of the slurry is proportional to the settling rate when no flocculant is added, k = v min / v a , v min is the first sedimentation velocity after adding flocculant, ν a is the second sedimentation velocity, and the k value and the flocculant concentration in the liquid phase satisfy the following relationship: Therefore, the dosage of flocculant to be added can be calculated by the concentration in the liquid phase.

[0070] It is easy to understand that the above experimental calibration method in this embodiment can adopt the existing conventional method, which is not limited in this embodiment. For example, 4 equal parts of the slurry to be settled are used, 1 of which does not add flocculant, and the other 3 parts are added with different doses of flocculant, the settling speed of the 4 parts of the slurry to be settled is detected, and the k value corresponding to the 3 parts of the slurry to be settled with the addition of flocculant is calculated. At the same time, the concentration of the flocculant in the 3 parts of the slurry to be settled is calculated. According to the 3 k values, 3 flocculant concentration values ​​and the above formula obtained by the above calculation, Establish a linear equation with three variables and solve it to get the value.

[0071] The flow rate and solid content of the feed are known, and the amount of flocculant to be added can be converted according to the liquid volume, for example: m = C × (1-C1) × v0. Among them, m is the amount of flocculant added, that is, the dosage, C is the concentration of flocculant in the liquid phase, C1 is the concentration of the thickener feed slurry, and v0 is the flow rate of the feed.

[0072] The present application has been experimentally verified as follows according to the method of the above embodiment:

[0073] Experimental Example 1:

[0074] The slurry entering the thickener after laterite nickel ore beneficiation was tested, and the feed concentration was measured to be 11.8%, pH was 6.8, and Zeta potential was 2.36mV. At this time, non-ionic PAM was selected.

[0075] Determine the relevant parameters of the feed slurry, discharge slurry and thickener, and substitute them into the above formula Get v min ; Among them, C1=0.118,ρ1=1.092*103kg / m 3, C2=0.4,ρ2=1.400*103kg / m 3,S=25㎡,G=400m 3 / h,according to the formula Calculate v min ≈8.04mm / s. It is worth noting that C2=0.4、ρ2=1.400*103kg / m 3 The target slurry concentration and density that the discharge slurry of the thickener needs to achieve are the set parameters.

[0076] Where, ρ0=1.0*103kg / m 3 ,ρ3=3.5*103kg / m 3 , d = 10um, η = 0.035Pa·s, according to the formula After calculation, we get v a ≈2.8mm / s; combined with k=v min / v a , k = 2.8525, in combination The calculated value is C≈0.00001kg / m 3 .

[0077] Among them, when calculating C, a1=-0.0516, a2=1.724*10 -6 ,a3=2.297*10 -11 The above a1-a3 are calculated according to the above exemplary method in this embodiment, that is, 4 equal portions of laterite nickel ore pulp after beneficiation are tested, one portion of which does not contain flocculant, and the other three portions are respectively tested at a concentration of C = 0.000015 kg / m 3 、C=0.00002kg / m 3 、C=0.000025kg / m 3 Add flocculant, test 4 slurries and obtain three first sedimentation velocities v min and a second sinking speed v a , and calculated k values ​​are 6.045, 10.867, and 18.48 respectively. Substitute the above flocculant concentration C and k value into the formula We can get a1=-0.0516, a2=1.724*10 -6 ,a3=2.297*10 -11 .

[0078] Substitute the obtained C value into the formula m = C × (1-C1) × v0, and get m = 16.74 kg / h, which is converted into a flocculant consumption of 74.75 g / t. Where v0 = 2044.5 m 3 / h, which is obtained by real-time detection of feed slurry.

[0079] The type and dosage of flocculant determined in the above steps are added to the thickener, and the discharge volume flow rate G = 400m 3 / h to control the thickener bottom flow discharge, detect the thickener bottom flow discharge concentration, and obtain the actual thickener bottom flow discharge concentration of 39.7%, the density is 1.396*103kg / m 3 After comparison, it was found that the actual underflow discharge concentration and density of the thickener were consistent with the target discharge slurry concentration and density (i.e. C2 = 0.4, ρ2 = 1.400*103kg / m 3 ), which shows that the type and dosage of flocculant determined in this application can meet the predetermined discharge requirements of the thickener underflow slurry.

[0080] Experimental Example 2:

[0081] The slurry after nickel and cobalt precipitation, that is, the slurry entering the thickener, was tested and the feed concentration was measured to be 6.8%, the pH was 7.0, and the Zeta potential was 9.86 mV. At this time, anionic PAM was selected.

[0082] Determine the relevant parameters of the feed slurry, discharge slurry and thickener, where C1 = 0.068, ρ1 = 1.046*103kg / m 3 , C2=0.3, ρ2=1.239*103kg / m 3 , S = 31.4 m2, G = 400 m 3 / h, according to the formula Calculate v min ≈6.19mm / s. It is worth noting that C2=0.3、ρ2=1.239*103kg / m 3 It is the target slurry concentration and density that the discharge slurry of the thickener needs to achieve.

[0083] Where, ρ0=1.0*103kg / m 3 ,ρ3=2.8*103kg / m 3 , d = 5.8um, η = 0.028Pa·s, after Calculate v a ≈0.83mm / s; calculated with k=7.46, C≈0.000011kg / m 3 The obtained v min Combined with v a , and obtain the flocculant concentration C in the slurry required to achieve the target discharge requirements.

[0084] Among them, when calculating the C value, a1=0.0965, a2=-2.893*10 -6 ,a3=3.636*10 -11The above a1-a3 are calculated according to the above exemplary method in this embodiment, that is, 4 equal parts of the slurry after nickel and cobalt precipitation are tested, one of which is not added with flocculant, and the other three are respectively at a concentration of C = 0.00001 kg / m 3 , concentration C = 0.000015kg / m 3 , concentration C = 0.00002kg / m 3 Add flocculant and test the sedimentation rate of 4 slurries to obtain the three first sedimentation rates v min and a second sinking speed v a , and calculated k values ​​are 5.855, 15.334, and 25.683 respectively. Substitute the flocculant concentration C and k value into the formula The calculation results show that a1 = 0.0965, a2 = -2.893*10 -6 ,a3=3.636*10 -11 .

[0085] Substitute the obtained C value into the formula m = C × (1-C1) × v0, and get m = 21.4 kg / h, which is converted into a flocculant consumption of 150.8 g / t. Where v0 = 2184 m 3 / h, which is obtained by real-time detection of feed slurry.

[0086] The type and dosage of flocculant determined in the above steps are added to the thickener, and the discharge volume flow rate G = 400m 3 / h to control the thickener bottom flow discharge, detect the thickener bottom flow discharge concentration, and obtain the actual thickener bottom flow discharge concentration of 29.5%, the density is 1.234*103kg / m 3 After comparison, it is found that the actual underflow discharge concentration and density of the thickener are consistent with the target discharge slurry concentration and density (i.e. C2 = 0.3, ρ2 = 1.239*103kg / m 3 ), which shows that the type and dosage of flocculant determined in this application can meet the predetermined discharge requirements of the thickener underflow slurry.

[0087] like Figure 3 As shown, the flocculant determination device 300 is used to determine the type and dosage of flocculants in the hydrometallurgical process of laterite nickel ore, and includes a type selection module 301, a settling velocity calculation module 302, and a dosage calculation module 303. The type selection module 301 is used to obtain the pH value of the thickener and the potential value of the surface of the slurry particles, and determine the type of flocculant based on the pH value and the potential value; the settling velocity calculation module 302 is used to obtain the feed slurry parameters and the discharge slurry parameters of the thickener, and determine the first settling velocity of the slurry in the thickener after adding the flocculant and the second settling velocity when the flocculant is not added based on the feed slurry parameters and the discharge slurry parameters; the dosage calculation module 303 is used to determine the dosage of the flocculant based on the first settling velocity and the second settling velocity.

[0088] The device for determining the selection and dosage of flocculants in the laterite-nickel ore hydrometallurgical process provided in the above-mentioned embodiment can realize the technical solution described in the method embodiment for determining the selection and dosage of flocculants in the laterite-nickel ore hydrometallurgical process. The specific implementation principles of the above-mentioned modules or units can be found in the corresponding contents in the method embodiment for determining the selection and dosage of flocculants in the laterite-nickel ore hydrometallurgical process, which will not be repeated here.

[0089] like Figure 4 As shown, the present application also provides an electronic device 400. The electronic device 400 includes a processor 401, a memory 402 and a display 403. Figure 4 Only some components of the electronic device 400 are shown, but it should be understood that it is not required to implement all of the components shown, and more or fewer components may be implemented instead.

[0090] In some embodiments, the memory 402 may be an internal storage unit of the electronic device 400, such as a hard disk or memory of the electronic device 400. In other embodiments, the memory 402 may also be an external storage device of the electronic device 400, such as a plug-in hard disk, a smart memory card (SmartMediaCard, SMC), a secure digital (SecureDigital, SD) card, a flash card (FlashCard), etc. equipped on the electronic device 400.

[0091] Furthermore, the memory 402 may include both an internal storage unit of the electronic device 400 and an external storage device. The memory 402 is used to store application software installed in the electronic device 400 and various data.

[0092] In some embodiments, the processor 401 can be a central processing unit (CPU), a microprocessor or other data processing chip, which is used to run the program code or process data stored in the memory 402, such as the method for determining the selection and dosage of flocculants in the laterite nickel ore hydrometallurgical process in the present application.

[0093] In some embodiments, the display 403 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, etc. The display 403 is used to display information on the electronic device 400 and to display a visual user interface. The processor 401, the memory 402, and the display 403 communicate with each other via a system bus.

[0094] In some embodiments of the present application, when the processor 401 executes the program for determining the type and dosage of flocculant in the laterite nickel ore hydrometallurgical process in the memory 402, the following steps may be implemented:

[0095] Obtain the pH value of the slurry in the thickener and the potential value of the slurry particle surface, and determine the type of flocculant based on the pH value and potential value;

[0096] Obtaining the feed slurry parameters and the discharge slurry parameters of the thickener, and determining the first settling velocity of the slurry in the thickener after adding the flocculant and the second settling velocity when the flocculant is not added based on the feed slurry parameters and the discharge slurry parameters;

[0097] Based on the first settling velocity and the second settling velocity, the dosage of the flocculant is determined.

[0098] It should be understood that: when the processor 401 executes the program for determining flocculant selection and dosage in the laterite nickel ore hydrometallurgical process in the memory 402, in addition to the above functions, other functions can also be realized. For details, please refer to the description of the corresponding method embodiment above.

[0099] Furthermore, the embodiment of the present application does not specifically limit the type of the electronic device 400 mentioned, and the electronic device 400 may be a portable electronic device such as a mobile phone, a tablet computer, a personal digital assistant (PDA), a wearable device, a laptop computer, etc. Exemplary embodiments of portable electronic devices include but are not limited to portable electronic devices equipped with IOS, Android, Microsoft or other operating systems. The above-mentioned portable electronic device may also be other portable electronic devices, such as a laptop computer with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of the present application, the electronic device 400 may not be a portable electronic device, but a desktop computer with a touch-sensitive surface (e.g., a touch panel).

[0100] On the other hand, the present application also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the computer program is executed by a processor to perform the method for determining the selection and dosage of flocculant in the laterite nickel ore hydrometallurgical process provided by the above methods, the method comprising:

[0101] Obtain the pH value of the slurry in the thickener and the potential value of the slurry particle surface, and determine the type of flocculant based on the pH value and potential value;

[0102] Obtaining the feed slurry parameters and the discharge slurry parameters of the thickener, and determining the first settling velocity of the slurry in the thickener after adding the flocculant and the second settling velocity when the flocculant is not added based on the feed slurry parameters and the discharge slurry parameters;

[0103] Based on the first settling velocity and the second settling velocity, the dosage of the flocculant is determined.

[0104] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0105] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for determining a flocculant, characterized in that: Used to determine the selection and dosage of flocculants in the hydrometallurgical process of laterite nickel ore, including: Obtaining the pH value of the slurry in the thickener and the potential value of the surface of the slurry particles, and determining the type of flocculant based on the pH value and the potential value; Obtaining the feed slurry parameters and the discharge slurry parameters of the thickener, and determining a first settling velocity of the slurry in the thickener after adding a flocculant and a second settling velocity when no flocculant is added based on the feed slurry parameters and the discharge slurry parameters; A dosage of a flocculant is determined based on the first settling velocity and the second settling velocity.

2. The method for determining a flocculant according to claim 1, characterized in that: The feed slurry parameters include: feed slurry concentration C1 and feed slurry density ρ1; the discharge slurry parameters include: discharge slurry concentration C2, discharge slurry density ρ2 and discharge volume flow G; obtain the settling area S of the thickener; The first sinking speed 3. The method for determining a flocculant according to claim 2, characterized in that: The feed slurry parameters also include the viscosity η of the feed slurry when it is not combined with a flocculant; obtaining the liquid phase density ρ0, the slurry density ρ3 and the average particle size d of the slurry; The second sinking speed 4. The method for determining a flocculant according to any one of claims 1 to 3, characterized in that: Determining a dosage of a flocculant based on the first settling velocity and the second settling velocity includes: Based on the ratio of the first sedimentation velocity to the second sedimentation velocity, the concentration of the flocculant is determined, and the dosage of the flocculant in the liquid phase is obtained according to the concentration of the flocculant.

5. The method for determining a flocculant according to claim 4, characterized in that: Determining the dosage of the flocculant based on the ratio of the first settling velocity to the second settling velocity and the concentration of the flocculant in the liquid phase comprises: Based on the ratio of the first sinking velocity to the second sinking velocity k=v min / v a ,according to Determine the concentration C of the flocculant and determine the dosage of the flocculant based on the concentration C.

6. The method for determining a flocculant according to claim 1, characterized in that: Determining the type of flocculant based on the pH value and the potential value includes: When the pH value is within the first preset pH range and the potential value is within the first preset potential range, the flocculant is non-ionic; When the pH value is within the second preset pH range and the potential value is within the second preset potential range, the flocculant is anionic; When the pH value is within the third preset pH range and the potential value is within the third preset potential range, the flocculant is a cationic type; The pH value within the third preset pH range is greater than the pH value within the first preset pH range and the pH value within the second preset pH range; The potential value within the first preset potential range is greater than the potential value within the third preset potential range.

7. The method for determining a flocculant according to claim 6, characterized in that: The lower limit value of the second preset pH range is smaller than the lower limit value of the first preset pH range, and the upper limit value of the second preset pH range is equal to the upper limit value of the first preset pH range.

8. A flocculant determination device, characterized in that: Used to determine the selection and dosage of flocculants in the hydrometallurgical process of laterite nickel ore, including: A selection module, used for obtaining the pH value of the thickener and the potential value of the surface of the slurry particles, and determining the type of flocculant based on the pH value and the potential value; A settling speed calculation module, used to obtain the feed slurry parameters and the discharge slurry parameters of the thickener, and determine the first settling speed of the slurry in the thickener after adding the flocculant and the second settling speed when the flocculant is not added based on the feed slurry parameters and the discharge slurry parameters; A dosage calculation module is used to determine the dosage of the flocculant based on the first settling velocity and the second settling velocity.

9. An electronic device, characterized in that It comprises a memory and a processor, wherein the memory is used to store a program; the processor is coupled to the memory and is used to execute the program stored in the memory to implement the steps of the flocculant selection method as claimed in any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the flocculant selection method according to any one of claims 1 to 7 are implemented.

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