Technology for improving recovery rate in potassium sulfate flotation process

Abstract

The invention relates to the cross technical field of mineral engineering and chemical engineering, in particular to a technology for improving the recovery rate in a flotation method potassium sulfate process. Comprising a method for improving the recovery rate of the flotation method potassium sulfate process and a three-stage flotation reaction tank system. The method for improving the recovery rate of the flotation-method potassium sulfate process comprises the following steps: carrying out roughing in a primary reaction tank, adding potassium chloride, ammonium sulfate and mother liquor raw materials, adding a collecting agent and a foaming agent, and carrying out double decomposition reaction to generate potassium sulfate. The invention provides a three-stage flotation technology and a reaction tank system matched with the three-stage flotation technology. The three-stage flotation technology and the reaction tank system are used for remarkably improving the recovery rate in a flotation method potassium sulfate process. According to the technology, a traditional single-stage flotation procedure is subdivided into three stages of rough flotation, intermediate flotation and fine flotation, and the design and operation parameters of each stage of reaction tank are optimized, so that more efficient potassium sulfate extraction is achieved. In addition, the invention also covers a detailed experimental verification method and a technical mass production evaluation process, so that the stability and feasibility of the new technology in actual production are ensured.

Description

Technical Field

[0001] The invention relates to the intersecting technical field of mining engineering and chemical engineering, and in particular to a recovery rate improvement technology in a potassium sulfate process by a flotation method. Background Art

[0002] In the traditional potassium sulfate production process, flotation is widely used for the initial enrichment of ore. However, the following disadvantages are found in the flotation process:

[0003] 1. The company currently uses conventional double decomposition reaction and flotation separation process, and its recovery rate is at the industry average level, but it can no longer meet the company's compound fertilizer production requirements for potassium sulfate production. The recovery rate of the process is not enough to support the company's large-scale production needs, resulting in potassium sulfate production being difficult to meet the needs of compound fertilizer production.

[0004] 2. The traditional flotation process is usually a single stage, and potassium sulfate and other impurity ions cannot be fully separated during the extraction process, resulting in a low recovery rate. It is difficult to completely remove impurities in a single stage of flotation, which affects the quality of the final product. At the same time, the potassium sulfate that cannot be effectively extracted is lost in the mixed solution, resulting in a waste of resources.

[0005] 3. The existing process lacks detailed research and optimization of key parameters such as drug addition amount, pH value and other ion concentrations. Imprecise parameter control may lead to unstable flotation conditions, which in turn affects the recovery rate. The inability to find the optimal flotation conditions reduces the overall extraction efficiency.

[0006] 4. The existing reaction tank design fails to maximize the use of space, and the connection between each process is not smooth enough, which affects the efficiency of the entire process. Unoptimized equipment design and process connection reduce the recycling rate of resources. Complex processes increase the difficulty of operation and increase labor costs.

[0007] Therefore, in view of this, the existing technology was studied and improved, and a technology for improving the recovery rate in the flotation potassium sulfate process was proposed. Summary of the invention

[0008] The problem solved by the present invention is that the recovery rate of the traditional flotation process is limited, the efficiency of the single-stage flotation process is low, there is a lack of precise process parameter control, and the equipment design and process optimization are insufficient.

[0009] The technical solution adopted by the present invention is: a technology for improving the recovery rate in a potassium sulfate flotation process, including a method for improving the recovery rate of a potassium sulfate flotation process, and a three-stage flotation reaction tank system;

[0010] The method for improving the recovery rate of potassium sulfate by flotation process has the following specific steps:

[0011] a. Rough selection is carried out in a primary reaction tank, potassium chloride, ammonium sulfate and mother liquor are added, and a collector and a frother are added to generate potassium sulfate through a double decomposition reaction;

[0012] b. outputting the roughly selected reaction solution to the secondary reaction tank, and transmitting the surface reaction solution to the filter press process to obtain the initially extracted potassium sulfate;

[0013] c. The secondary reaction tank is selected, the filtrate and the remaining solution from the primary reaction tank are further subjected to flotation separation, and the selected reaction solution is output to the tertiary reaction tank, and the surface reaction solution is also transmitted to the filter press process;

[0014] d. Performing concentrating in the tertiary reaction tank, further floating out the potassium sulfate in the reactants, and finally obtaining a high-purity potassium sulfate product through a filter press process;

[0015] The specific steps of the three-stage flotation reaction tank system are as follows:

[0016] a. The primary reaction tank is equipped with a mother liquor inlet pipeline, potassium chloride and ammonium sulfate raw material input ports, and a drug addition port. The reaction tank has two outlets, which are connected to the secondary reaction tank and the filter press process respectively;

[0017] b. A secondary reaction tank, having two inlets connected to the primary tank and the filtrate and a drug addition port, and also having two outlets, connected to the tertiary tank and the filter press process respectively;

[0018] c. A three-stage reaction tank, whose two outlets are connected to the filter press process and the mother liquor pool respectively, for recovering the reaction liquid.

[0019] As a further solution of the present invention: in the multi-stage flotation process, each stage reaction tank is provided with a drug addition port for adjusting the pH value of the slurry or other ion concentrations to optimize the flotation conditions and improve the recovery rate.

[0020] As a further solution of the present invention: the three-stage reaction tank is designed as a series structure, and the reaction tanks at each stage are connected by pipelines to form a closed loop, thereby ensuring the smooth flow of the reaction liquid and improving resource utilization.

[0021] As a further solution of the present invention: the method for improving the recovery rate of potassium sulfate flotation process also includes studying the relationship between the amount of drug added and the recovery rate in each stage of flotation process, and determining the optimal pH value of the reaction tank and the amount of drug added to achieve the highest recovery rate.

[0022] As a further solution of the present invention: the method for improving the recovery rate of potassium sulfate process by flotation also includes a technology mass production evaluation, that is, under the conditions of fixed drug addition combination and addition amount, the quality and output of potassium sulfate products are evaluated to ensure that the technology has stable mass production capacity.

[0023] As a further solution of the present invention: each stage of the reaction tank is designed with an optimized internal structure to ensure the smooth progress of each stage of the flotation process and to improve the reaction efficiency and resource utilization.

[0024] As a further solution of the present invention: the three-stage flotation reaction tank system is also equipped with a control system for monitoring and controlling key parameters of the flotation process to ensure the best flotation effect.

[0025] As a further solution of the present invention: the specific steps of the technical mass production evaluation are as follows:

[0026] a. Fix the drug addition combination and addition amount and conduct trial production experiments;

[0027] b. Evaluate the quality stability and output of potassium sulfate products during the trial production process;

[0028] c. Determine whether the technology has the capability for stable mass production and optimize the process based on the evaluation results.

[0029] As a further solution of the present invention: the technology mass production evaluation also includes summarizing the experience and lessons learned during the trial production process to optimize the process flow, improve mass production stability, and ensure the commercialization of the technology.

[0030] Beneficial effects of the present invention:

[0031] The present invention achieves more thorough potassium sulfate extraction through three-stage flotation technology, greatly improving the recovery rate, ensuring that the company can significantly increase potassium sulfate production within a limited space, reduce dependence on external purchases of potassium sulfate, and maintain a healthy supply chain.

[0032] The present invention can more effectively separate potassium sulfate from other impurity ions through roughing, intermediate and fine classification treatment in the three-stage flotation process, improve the purity and recovery efficiency of the product, and thus improve the quality of the final product.

[0033] The present invention improves the flotation conditions by studying the relationship between the amount of reagent added and the recovery rate in each stage of the flotation process and adjusting the pH value of the slurry or other ion concentrations, making the effects of the collector and the mineral particles more effective, and achieving the optimal combination of the pH value of the reaction tank and the amount of reagent added under the condition of the highest recovery rate.

[0034] The present invention optimizes the flow path of the reaction liquid through the design of three-stage series flotation reaction tanks, ensuring the smooth progress of each stage of flotation process; at the same time, a closed loop is formed to improve resource utilization. In addition, the operation process is simplified, the labor cost is reduced, and the work efficiency is improved. DETAILED DESCRIPTION

[0035] The present invention will be further described below.

[0036] A technology for improving the recovery rate in a flotation potassium sulfate process, including a method for improving the recovery rate of a flotation potassium sulfate process, and a three-stage flotation reaction tank system;

[0037] The specific steps of the method for improving the recovery rate of potassium sulfate by flotation are as follows:

[0038] a. Rough selection is carried out in the primary reaction tank, raw materials such as potassium chloride, ammonium sulfate and mother liquor are put into the reaction tank, and a collector and a frother are added to generate potassium sulfate through double decomposition reaction;

[0039] b. outputting the roughly selected reaction solution to the secondary reaction tank, and transmitting the surface reaction solution to the filter press process to obtain the initially extracted potassium sulfate;

[0040] c. The secondary reaction tank is selected, the filtrate and the remaining solution from the primary reaction tank are further subjected to flotation separation, and the selected reaction solution is output to the tertiary reaction tank, and the surface reaction solution is also transmitted to the filter press process;

[0041] d. Performing concentrating in the tertiary reaction tank, further floating out the potassium sulfate in the reactants, and finally obtaining a high-purity potassium sulfate product through a filter press process;

[0042] In the multi-stage flotation process, each stage of the reaction tank is equipped with a drug addition port to adjust the pH value of the slurry or other ion concentrations to optimize the flotation conditions and improve the recovery rate.

[0043] The three-stage reaction tank is designed as a series structure. The reaction tanks at each stage are connected by pipelines to form a closed loop, ensuring the smooth flow of the reaction liquid and improving resource utilization.

[0044] The method for improving the recovery rate of potassium sulfate flotation process also includes studying the relationship between the amount of drugs added and the recovery rate in each stage of flotation process, determining the optimal pH value of the reaction tank and the amount of drugs added to achieve the highest recovery rate. The method for improving the recovery rate of potassium sulfate flotation process also includes technical mass production evaluation, that is, evaluating the quality and output of potassium sulfate products under the conditions of fixed drug addition combination and addition amount to ensure that the technology has stable mass production capacity.

[0045] The specific steps of the three-stage flotation reaction tank system are as follows:

[0046] a. The primary reaction tank is equipped with a mother liquor inlet pipeline, potassium chloride and ammonium sulfate raw material input ports, and a drug addition port. The reaction tank has two outlets, which are connected to the secondary reaction tank and the filter press process respectively;

[0047] b. A secondary reaction tank, having two inlets connected to the primary tank and the filtrate and a drug addition port, and also having two outlets, connected to the tertiary tank and the filter press process respectively;

[0048] c. A three-stage reaction tank, whose two outlets are connected to the filter press process and the mother liquor pool respectively, for recovering the reaction liquid.

[0049] Each stage of the reaction tank is designed with an optimized internal structure to ensure the smooth progress of each stage of flotation process and improve reaction efficiency and resource utilization.

[0050] The three-stage flotation reaction tank system is also equipped with a control system for monitoring and controlling key parameters of the flotation process (such as pH value, amount of drug added, etc.) to ensure the best flotation effect.

[0051] The specific steps for technology mass production evaluation are as follows:

[0052] a. Fix the drug addition combination and addition amount and conduct trial production experiments;

[0053] b. Evaluate the quality stability and output of potassium sulfate products during the trial production process;

[0054] c. Determine whether the technology has the capability for stable mass production and optimize the process based on the evaluation results.

[0055] The technology mass production evaluation also includes summarizing the experiences and lessons learned during the trial production process to optimize the process flow, improve mass production stability, and ensure the commercialization of the technology.

[0056] The following research methods were used:

[0057] 1. Experimental verification method: Use actual flotation experiments to verify the effectiveness of the three-stage flotation technology and the feasibility of improving the recovery rate.

[0058] 2. Single variable method: When studying flotation process parameters, the impact on the recovery rate is observed by adjusting a single variable (such as the amount of drug added, pH value, etc.).

[0059] 3. Comparative analysis method: Determine the optimal operating conditions by comparing the recovery rates at different flotation stages and the experimental results under different process parameters.

[0060] 4. Data analysis method: Analyze the experimental data to determine the relationship between the amount of drug added and the recovery rate, as well as the optimal process parameters.

[0061] 5. Concept analysis method: During the project design phase, the design concepts of the multi-stage flotation process and multi-stage reaction tank are analyzed to ensure the scientificity and practicality of the design.

[0062] 6. Experience summary method: During the technology mass production evaluation stage, summarize the experiences and lessons learned during the trial production process to optimize the process flow and improve mass production stability.

[0063] A fertilizer production company plans to improve the recovery rate of its flotation potassium sulfate process to meet the needs of compound fertilizer production. The company decided to adopt the three-stage flotation technology and supporting equipment proposed in this project for technical transformation.

[0064] Implementation plan:

[0065] Equipment installation and commissioning: According to the design plan, install the three-stage flotation reaction tank and related supporting facilities, and conduct commissioning to ensure the normal operation of each system.

[0066] Parameter optimization: According to the laboratory research results, the initial process parameters are set and gradually optimized until the best recovery rate is achieved.

[0067] Mass production evaluation: Conduct multiple batches of trial production experiments to evaluate product quality and output and verify the feasibility and stability of the technology.

[0068] Officially put into production: After many trials and optimizations, it was officially put into large-scale production, achieving a significant increase in recovery rate and reduction in cost.

[0069] Implementation effect:

[0070] Improved recovery rate: Through the application of three-stage flotation technology, the potassium sulfate recovery rate has increased from the original industry average to more than 1.15 (45% potassium sulfate recovery rate) and 1.05 (50% potassium sulfate recovery rate), achieving the expected goal.

[0071] Improved product quality: Product purity and water content are more in line with standard requirements, which improves market competitiveness.

[0072] Significant economic benefits: reduced dependence on external purchases of potassium sulfate, lowered production costs, and increased the company's economic and social benefits.

[0073] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A technology for improving the recovery rate in the flotation potassium sulfate process, characterized by: It includes a method for improving the recovery rate of potassium sulfate process by flotation, and a three-stage flotation reaction tank system; The method for improving the recovery rate of potassium sulfate by flotation process has the following specific steps: a. Rough selection is carried out in a primary reaction tank, potassium chloride, ammonium sulfate and mother liquor are added, and a collector and a frother are added to generate potassium sulfate through a double decomposition reaction; b. outputting the roughly selected reaction solution to the secondary reaction tank, and transmitting the surface reaction solution to the filter press process to obtain the initially extracted potassium sulfate; c. The secondary reaction tank is selected, the filtrate and the remaining solution from the primary reaction tank are further subjected to flotation separation, and the selected reaction solution is output to the tertiary reaction tank, and the surface reaction solution is also transmitted to the filter press process; d. Performing concentrating in the tertiary reaction tank, further floating out the potassium sulfate in the reactants, and finally obtaining a high-purity potassium sulfate product through a filter press process; The specific steps of the three-stage flotation reaction tank system are as follows: a. The primary reaction tank is equipped with a mother liquor inlet pipeline, potassium chloride and ammonium sulfate raw material input ports, and a drug addition port. The reaction tank has two outlets, which are connected to the secondary reaction tank and the filter press process respectively; b. A secondary reaction tank, having two inlets connected to the primary tank and the filtrate and a drug addition port, and also having two outlets, connected to the tertiary tank and the filter press process respectively; c. A three-stage reaction tank, whose two outlets are connected to the filter press process and the mother liquor pool respectively, for recovering the reaction liquid.

2. The recovery rate improvement technology in the flotation potassium sulfate process according to claim 1 is characterized in that: In the multi-stage flotation process, each stage of the reaction tank is equipped with a drug addition port to adjust the pH value of the slurry or other ion concentrations to optimize the flotation conditions and improve the recovery rate.

3. The recovery rate improvement technology in the potassium sulfate flotation process according to claim 2 is characterized in that: The three-stage reaction tank is designed as a series structure, and the reaction tanks at each stage are connected by pipelines to form a closed loop, thereby ensuring the smooth flow of the reaction liquid and improving resource utilization.

4. The recovery rate improvement technology in the flotation potassium sulfate process according to claim 3 is characterized in that: The method for improving the recovery rate of potassium sulfate flotation process also includes studying the relationship between the amount of drug added and the recovery rate in each stage of flotation process, and determining the optimal pH value of the reaction tank and the amount of drug added to achieve the highest recovery rate.

5. The recovery rate improvement technology in the flotation potassium sulfate process according to claim 4 is characterized in that: The method for improving the recovery rate of potassium sulfate process by flotation also includes a technology mass production evaluation, that is, evaluating the quality and output of potassium sulfate products under the conditions of fixed drug addition combination and addition amount to ensure that the technology has stable mass production capabilities.

6. The recovery rate improvement technology in the flotation potassium sulfate process according to claim 1 is characterized in that: Each stage of the reaction tank is designed with an optimized internal structure to ensure the smooth progress of each stage of flotation process and improve reaction efficiency and resource utilization.

7. The recovery rate improvement technology in the flotation potassium sulfate process according to claim 6 is characterized in that: The three-stage flotation reaction tank system is also equipped with a control system for monitoring and controlling key parameters of the flotation process to ensure the best flotation effect.

8. The recovery rate improvement technology in the flotation potassium sulfate process according to claim 5 is characterized in that: The specific steps of the technology mass production evaluation are as follows: a. Fix the drug addition combination and addition amount and conduct trial production experiments; b. Evaluate the quality stability and output of potassium sulfate products during the trial production process; c. Determine whether the technology has the capability for stable mass production and optimize the process based on the evaluation results.

9. The recovery rate improvement technology in the flotation potassium sulfate process according to claim 8 is characterized in that: The technology mass production evaluation also includes summarizing the experiences and lessons learned during the trial production process to optimize the process flow, improve mass production stability, and ensure the commercialization of the technology.