A method for optimizing parameters of deep-sea particulate ore vertical lifting

Abstract

This invention belongs to the field of deep-sea mineral resource mining technology and discloses a method for optimizing parameters for vertical lifting of deep-sea granular ore. Under a set conveying capacity, the method optimizes parameters based on the liquid flow velocity V and the critical flow velocity u of the granules. l Satisfying V>u l Under the constraint of +1.5, the pipe inner diameter, particle volume concentration, and liquid flow velocity corresponding to the minimum unit frictional resistance are accurately determined. This invention can effectively improve the efficiency of vertical lifting of deep-sea particle ore, reduce transportation energy consumption, and provide technical support for the efficient mining of deep-sea mineral resources.

Description

Technical Field

[0001] This invention relates to the field of deep-sea mineral resource mining technology, and in particular to a method for optimizing the vertical lifting parameters of deep-sea particulate ore. Background Technology

[0002] In the field of deep-sea mineral resource development technology, the vertical lifting of deep-sea granular ore is a key link in the deep-sea mineral mining process, and its vertical transport efficiency and energy consumption directly affect the economics of the entire mining project.

[0003] In the vertical lifting of deep-sea granular ore, numerous factors influence the process, including pipe diameter, solid volume concentration, and liquid flow velocity. Inappropriate parameter selection can lead to pipe blockage, excessive energy consumption, and even equipment damage, impacting both transport efficiency and energy consumption. Current technologies lack a systematic and precise parameter optimization method, making it difficult to minimize unit frictional resistance while ensuring transport safety. Therefore, a scientific and effective parameter optimization method for vertical lifting of deep-sea granular ore is urgently needed. Summary of the Invention

[0004] The purpose of this invention is to provide a method for optimizing the parameters of vertical lifting of deep-sea granular ore, so as to solve the problems of low efficiency and high energy consumption in vertical lifting of deep-sea granular ore.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A method for optimizing parameters for vertical lifting of deep-sea particulate ore includes the following steps:

[0007] S1, Set the conveying capacity M of the vertical lifting pipeline, and determine the particle volumetric flow rate Q in the deep-sea granular ore based on the conveying capacity M. s :

[0008] Q s =M / 3600ρ s ;

[0009] In the formula, ρ s The particle density in the deep-sea granular ore;

[0010] S2, based on the particle volumetric flow rate Q s Calculate the liquid volumetric flow rate Q in the deep-sea particulate ore. L :

[0011] ;

[0012] In the formula, C v The particle volume concentration in the deep-sea granular ore;

[0013] S3, Calculate the liquid flow velocity V in the vertical lifting pipe:

[0014] ;

[0015] In the formula, D is the inner diameter of the vertical lifting pipe;

[0016] S4, filter for conditions V>(u) l Candidate parameter combinations (C +1.5) v ,D,V),u l The critical flow velocity of the particles inside the vertical lifting pipe;

[0017] S5, for each of the candidate parameter combinations (C) v ,D,V), calculate unit friction I m :

[0018] ;

[0019] In the formula, λ f V is the coefficient of friction of the inner wall of the vertical lifting pipe. m The velocity of the mixture within the vertical lifting pipe;

[0020] S6, select the minimum unit friction I m The corresponding candidate parameter combination (C) v (,D,V), representing the particle volume concentration C in the deep-sea particulate ore. v Select the inner diameter D of the vertical lifting pipe and carry out the lifting operation according to the liquid flow rate V.

[0021] In some embodiments, the critical flow velocity u of the particles within the vertical lifting pipe l for:

[0022]

[0023] In the formula, g is the acceleration due to gravity; ρ is the density of the liquid; d min d is the minimum particle size in the deep-sea granular ore. 50 d is the median particle size of the particles in the deep-sea particulate ore. max The maximum particle size in the deep-sea particulate ore is given.

[0024] In some embodiments, the mixture velocity V m The calculation formula is:

[0025] V m =V(1-C v )+(V-V slip C v ;

[0026] In the formula, V slip The slip velocity of the particles in the deep-sea granular ore is given.

[0027] In some embodiments, the slip velocity V of the particles in the deep-sea granular ore slip :

[0028] .

[0029] In some embodiments, in step S3, the inner diameter D of the vertical lifting pipe is uniformly selected at 0.02m intervals within the range of 0.1m-0.5m.

[0030] In some embodiments, in step S6, the particle volume concentration Select values ​​evenly at intervals of 0.01 within the range of 0.05-0.15.

[0031] In some embodiments, the friction coefficient λ f Set it to 0.02.

[0032] In some embodiments, the liquid density ρ is taken as 1.0 t / m³. 3 .

[0033] The beneficial effects of this invention are:

[0034] The method for optimizing parameters for vertical lifting of deep-sea particulate ore provided by this invention is based on the liquid flow velocity V and the critical flow velocity u of the particles. l Satisfying V>(u) l Under the constraint of +1.5), the optimal parameter combination corresponding to the minimum unit friction is obtained, which enables the accurate determination of the pipe inner diameter, particle volume concentration and liquid flow velocity. This can effectively improve the efficiency of vertical lifting of deep-sea particle ore, reduce transportation energy consumption, and provide technical support for the efficient mining of deep-sea mineral resources. Attached Figure Description

[0035] Figure 1 This is a flowchart of the method for optimizing the vertical lifting parameters of deep-sea particulate ore provided in an embodiment of the present invention. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0037] like Figure 1 The method for optimizing vertical lifting parameters of deep-sea particulate ore provided in this embodiment of the invention includes the following steps:

[0038] S1, set the conveying capacity M of the vertical lifting pipeline, and determine the particle volumetric flow rate Q in the deep-sea granular ore based on the conveying capacity M. s :

[0039] Q s =M / 3600ρ s ;

[0040] In the formula, ρ s Particle density; unit: t / m³ 3 Particle volumetric flow rate Q s The unit is m 3 / s; the unit of conveying capacity M is t / h;

[0041] It should be noted that in deep-sea granular ore, the particle density ρ s The minimum particle size d in deep-sea granular ore min Median particle size d in deep-sea particulate ore 50 The maximum particle size d in deep-sea granular ore max These are parameters that can be obtained through prior measurement.

[0042] S2, based on particle volumetric flow rate Q s Calculate the liquid volumetric flow rate Q in deep-sea particulate ore. L :

[0043] ;

[0044] In the formula, C v The particle volume concentration in deep-sea particulate ore; the liquid volumetric flow rate Q. L The unit is m 3 / s.

[0045] S3, Calculate the liquid velocity V in the vertical lift pipe:

[0046] ;

[0047] In the formula, D is the inner diameter of the vertical lifting pipe, in meters; and the liquid flow velocity V is in meters per second.

[0048] S4, filter for conditions V>(u) l Candidate parameter combinations (C +1.5) v ,D,V),u l To vertically increase the critical flow velocity of particles inside the pipe;

[0049] Among them, the critical flow velocity u of particles in the vertical lifting pipe l for:

[0050]

[0051] In the formula, the critical flow velocity u l The unit is m / s; g is the acceleration due to gravity, taken as 9.8 m / s²; ρ is the density of the liquid, which is generally water or seawater, and in this embodiment, the density of water is taken as 1.0 t / m³. 3 ;d min d represents the minimum particle size in deep-sea granular ore. 50 d represents the median particle size in deep-sea particulate ore. max The maximum particle size in deep-sea granular ore is given in meters (m).

[0052] It is understandable that the liquid flow velocity V is related to the pipe inner diameter D, and the critical flow velocity u l With pipe inner diameter D and particle volume concentration C v Related, therefore, establish V>(u l The constraint of +1.5 m / s ensures efficient particle transport. Furthermore, the pipe inner diameter D and particle volume concentration C can be obtained. v The correlation between the parameters can be used to obtain multiple candidate parameter combinations (C). v (,D,V).

[0053] S5, for each candidate parameter combination (C v ,D,V), calculate unit friction I m :

[0054] ;

[0055] In the formula, λ f To determine the friction coefficient of the inner wall of a vertical lifting pipe, based on the material of conventionally used vertical lifting pipes, the friction coefficient λ... f The value is set to 0.02. V m To vertically increase the velocity of the mixture inside the pipe;

[0056] Mixture velocity V m The calculation formula is:

[0057] V m =V(1-C v )+(V-V slip C v ;

[0058] Among them, V slip The slip velocity of particles in deep-sea granular ore is expressed in m / s.

[0059] The slip velocity V of particles in deep-sea granular ore slip for:

[0060] .

[0061] S6, select the minimum unit friction I m The corresponding candidate parameter combination (C) v (,D,V), for particle volume concentration C in deep-sea particulate ore. v Select the inner diameter D of the vertical lifting pipe and carry out the lifting operation according to the liquid flow velocity V.

[0062] When calculating unit frictional resistance, the particle volume concentration C v The candidate values ​​for the pipe inner diameter D are selected uniformly at intervals of 0.01 within the range of 0.05-0.15.

[0063] Here, the transport capacity M refers to the output of lifting deep-sea granular ore to land. For example, a transport capacity of Mt / h means transporting M tons of deep-sea granular ore per hour. Deep-sea granular ore consists of a mixture of particles and liquid, within a known particle size range and particle density ρ. s Under these conditions, the pipe inner diameter D and particle volume concentration C should be set appropriately. v This allows for more economical and efficient vertical lifting of deep-sea granular ore.

[0064] When using a vertical lifting pipeline, if the inner diameter D of the pipeline is too small, pipe blockage is likely to occur; if it is too large, economic efficiency is poor. The efficiency of the lifting operation is affected by the particle volume concentration C in the mixture. v The effect of particle volume concentration C v Too low a concentration results in poor economic efficiency; particle volume concentration C v Excessive height can easily lead to pipe blockage. The unit frictional resistance (I) of vertically lifting pipes... m Simultaneously, it affects both economic efficiency and driving force, unit friction I m The larger the friction coefficient, the greater the power required for lifting, and the worse the fuel economy. Therefore, in this embodiment of the invention, the friction coefficient is measured by unit friction coefficient I. m As the optimization objective, the unit friction I m Minimization means minimizing energy loss during transportation, effectively reducing the energy costs of deep-sea mineral resource extraction. A unit frictional resistance I is selected. m The minimum values ​​correspond to the pipe inner diameter D, liquid flow velocity V, and particle volume concentration C. v This ensures the smooth transport of deep-sea granular ore, avoids pipeline blockage, and improves transport efficiency.

[0065] The method for optimizing parameters for vertical lifting of deep-sea particulate ore provided by this invention is based on the liquid flow velocity V and the critical flow velocity u of the particles. l Satisfying V>(u) l Under the constraint of +1.5), the unit friction I is obtained. m The optimal parameter combination corresponding to the minimum (C) v(,D,V), to achieve control over the pipe inner diameter D and particle volume concentration C. v The precise determination of the liquid flow velocity V can effectively improve the efficiency of vertical lifting of deep-sea granular ore, reduce transportation energy consumption, and provide technical support for the efficient mining of deep-sea mineral resources.

[0066] The method for optimizing parameters for vertical lifting of deep-sea granular ore provided by this invention is applicable to vertical lifting projects of deep-sea granular ore with different conveying capacities M and different particle characteristics (including particle size, particle volume concentration and particle density, etc.), and has wide applicability.

[0067] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for optimizing parameters of vertical lifting of deep-sea particulate ore, characterized in that, Includes the following steps: S1, Set the conveying capacity M of the vertical lifting pipeline, and determine the particle volumetric flow rate Q in the deep-sea granular ore based on the conveying capacity M. s : Q s =M / 3600ρ s ; In the formula, ρ s The particle density in the deep-sea granular ore; S2, based on the particle volumetric flow rate Q s Calculate the liquid volumetric flow rate Q in the deep-sea particulate ore. L : ； In the formula, C v The particle volume concentration in the deep-sea granular ore; S3, Calculate the liquid flow velocity V in the vertical lifting pipe: ； In the formula, D is the inner diameter of the vertical lifting pipe; S4, filter for conditions V>(u) l Candidate parameter combinations (C +1.5) v ,D,V),u l The critical flow velocity of the particles inside the vertical lifting pipe; S5, for each of the candidate parameter combinations (C) v ,D,V), calculate unit friction I m : ； In the formula, λ f V is the coefficient of friction of the inner wall of the vertical lifting pipe. m The velocity of the mixture within the vertical lifting pipe; S6, select the minimum unit friction I m The corresponding candidate parameter combination (C) v (,D,V), for the particle volume concentration C in the deep-sea granular ore. v Select the inner diameter D of the vertical lifting pipe and carry out the lifting operation according to the liquid flow rate V.

2. The method for optimizing vertical lifting parameters of deep-sea particulate ore according to claim 1, characterized in that, The critical flow velocity u of the particles inside the vertical lifting pipe l for: ； In the formula, g is the acceleration due to gravity; ρ is the density of the liquid; d min d is the minimum particle size in the deep-sea granular ore. 50 d is the median particle size of the particles in the deep-sea particulate ore. max The maximum particle size in the deep-sea particulate ore is given.

3. The method for optimizing vertical lifting parameters of deep-sea particulate ore according to claim 1, characterized in that, The velocity of the mixture V m The calculation formula is: In m =V(1-C v )+(V-V slip )C v ; In the formula, V slip The slip velocity of the particles in the deep-sea granular ore is given.

4. The method for optimizing vertical lifting parameters of deep-sea particulate ore according to claim 3, characterized in that, The slip velocity V of the particles in the deep-sea granular ore slip : 。 5. The method for optimizing vertical lifting parameters of deep-sea particulate ore according to claim 1, characterized in that, In step S3, the inner diameter D of the vertical lifting pipe is selected uniformly at 0.02m intervals within the range of 0.1m-0.5m.

6. The method for optimizing vertical lifting parameters of deep-sea particulate ore according to claim 1, characterized in that, In step S6, the particle volume concentration Select values ​​evenly at intervals of 0.01 within the range of 0.05-0.

15.

7. The method for optimizing vertical lifting parameters of deep-sea particulate ore according to claim 1, characterized in that, Friction coefficient λ f Set it to 0.

02.

8. The method for optimizing vertical lifting parameters of deep-sea particulate ore according to claim 2, characterized in that, The liquid density ρ is taken as 1.0 t / m³. 3 .

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