Method for graded heating of flotation reagent preparation water based on cooling waste heat of strong magnetic separator

Abstract

The invention relates to the technical field of mineral separation, and provides a method for graded heating of flotation reagent preparation water based on cooling waste heat of a strong magnetic separator, which comprises the following steps: introducing normal-temperature water into the strong magnetic separator for cooling and heat exchange to obtain cooling hot water with increased temperature; one part of the cooling hot water is divided into a first water flow and a second water flow; the first path of water flow enters an air energy heat pump to be heated for the first time, and first-temperature hot water is obtained; the first-temperature water flow enters the water source heat pump to be heated for the second time, the second-path water flow enters the heat source side of the water source heat pump to serve as a heat source for heating for the second time, and second-temperature hot water higher than the first-temperature hot water is obtained; and supplying the hot water at the second temperature to a primary preparation process of the flotation reagent, and supplying the hot water at the first temperature to a secondary preparation process of the flotation reagent. Efficient recovery and gradient utilization of the cooling waste heat of the strong magnetic separator are achieved, two kinds of stable hot water at different temperatures can be synchronously produced, and the preparation procedure of the flotation reagent is precisely connected in a butt joint mode.

Description

Technical Field

[0001] This invention relates to the field of mineral processing technology, and in particular to a method for using waste heat from a strong magnetic generator to heat water for flotation reagent preparation in a staged manner. Background Technology

[0002] In the mineral processing production process, the preparation of flotation reagents requires stable industrial hot water at a specific temperature to meet the needs of different processes such as primary and secondary preparation.

[0003] Traditional hot water preparation methods primarily rely on external heat sources such as electric heaters or coal-fired boilers, resulting in high energy consumption and operating costs. Simultaneously, the core equipment in mineral processing plants, the high-intensity magnetic stirrer, requires a large amount of cooling water for cooling during operation. After heat exchange with the equipment, the temperature of the cooling water rises significantly, forming a large amount of low-temperature cooling hot water. In traditional processes, this cooling hot water, carrying considerable waste heat, is simply cooled and then recycled, failing to effectively extract and utilize its inherent thermal energy, leading to significant energy waste. Furthermore, existing industrial hot water supply systems often have poor compatibility with the actual process flow of flotation reagent preparation, providing a uniform and highly fluctuating hot water temperature. This fails to simultaneously and stably meet the differentiated temperature requirements of different preparation stages, affecting not only the preparation effect and consistency of the reagents but also restricting the overall efficiency and stability of mineral processing production.

[0004] Therefore, there is an urgent need for a method that can effectively recover and utilize the waste heat from the cooling of the strong magnetizer and can stably supply hot water at multiple temperatures to precisely match the flotation reagent preparation process. Summary of the Invention

[0005] To address the technical problems of existing technologies, such as wasted waste heat from strong magnetic flux turbine cooling, high energy consumption in preparing industrial hot water from external heat sources, and unstable hot water temperature that is difficult to adapt to the multi-stage preparation process of flotation reagents, this invention proposes a method for staged heating of water used for flotation reagent preparation based on waste heat from strong magnetic flux turbine cooling, comprising: Step a: Pass room temperature water through a strong magnetic generator for cooling and heat exchange to obtain cooled hot water with an increased temperature; Step b: Divide a portion of the cooling hot water into a first water flow and a second water flow; Step c: The first water flow is fed into an air source heat pump for initial heating to obtain hot water at the first temperature; Step d: The first temperature water flow is fed into the water source heat pump for a second heating, and the second water flow is fed into the heat source side of the water source heat pump as the heat source for the second heating, so as to obtain hot water at a second temperature higher than the first temperature. Step e: Supply the hot water at the second temperature to the primary preparation process of the flotation reagent, and supply the hot water at the first temperature to the secondary preparation process of the flotation reagent.

[0006] In some embodiments, the method of using waste heat from a strong magnetic motor to stage-heat flotation reagent preparation water further includes: Step f: Cool the remaining portion of the hot water after it has been diverted, and then return it to the cooling heat exchange process in step a.

[0007] In some embodiments, the cooling process in step f is achieved by a cooling tower, and the water temperature after cooling is not higher than 22°C.

[0008] In some embodiments, the temperature of the ambient water is 15~25°C, and the temperature of the cooled hot water is 25~40°C.

[0009] In some embodiments, the temperature of the first temperature water is 40~50°C, and the temperature of the second temperature water is 65~85°C.

[0010] In some embodiments, the flow rate ratio of the first water flow to the second water flow in step b is 1:(1~20).

[0011] In some embodiments, in step b, the flow rate of a portion of the cooling hot water is 30~250 m³ / h, the flow rate of the first water stream is 10~60 m³ / h, and the flow rate of the second water stream is 10~200 m³ / h.

[0012] In some embodiments, step c is followed by: The obtained hot water at the first temperature is stored in a first insulated water tank, wherein the volume of the first insulated water tank is 20~120m³.

[0013] In some embodiments, step d is followed by: The obtained hot water at the second temperature is stored in a second insulated water tank, wherein the volume of the second insulated water tank is 10~60m³.

[0014] In some embodiments, the replenishment flow rate of the ambient temperature water is determined based on the total consumption of the first water flow and the second water flow.

[0015] This invention offers at least the following advantages: It proposes a method for staged heating of flotation reagent preparation water based on the waste heat from a strong magnetic flux generator (SMF) cooling process. This method achieves efficient recovery and tiered utilization of the waste heat from the SMF cooling process, simultaneously producing two stable hot waters at different temperatures, precisely matching the flotation reagent preparation steps. This solves the problems of energy waste, high costs, and mismatched hot water supply in existing methods. Specifically, by utilizing the cooling hot water generated by the SMF as a heat source, waste heat is recovered and utilized, reducing dependence on traditional external energy sources and saving production costs. An air-source heat pump is used for initial heating, combined with a water-source heat pump using another portion of the cooling hot water as a heat source for secondary heating. This dual-stage heating mode is efficient and synergistic, stably producing first and second temperature hot waters with minimal temperature fluctuations. These two different temperature hot waters are supplied to the primary and secondary flotation reagent preparation steps respectively, achieving precise matching between heat output and production needs, ensuring reagent preparation effectiveness and mineral processing stability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0017] Figure 1 A flowchart of a method for staged heating of flotation reagent preparation water based on waste heat from strong magnetic field cooling, provided as an embodiment of the present invention; Figure 2 A schematic diagram of the process flow for a method of using water for preparing flotation reagents based on the staged heating of waste heat from strong magnetic field cooling, provided for another embodiment of the present invention. Detailed Implementation

[0018] The following describes embodiments of the present invention. However, it should be understood that the disclosed embodiments are merely examples, and other embodiments may take various alternative forms.

[0019] Furthermore, it should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that comprises a list of elements may include not only those elements but also elements not expressly listed or inherent to such process, method, article, or apparatus.

[0020] One or more embodiments of the present invention will now be described with reference to the accompanying drawings.

[0021] To achieve the above objectives, this invention provides an embodiment of a method for staged heating of flotation reagent preparation water based on the waste heat from a strong magnetic field compressor. The method includes: Step a: Pass room temperature water through a strong magnetic generator for cooling and heat exchange to obtain cooled hot water with an increased temperature.

[0022] Here, ambient temperature water refers to clean industrial water available within the mineral processing plant, such as treated river water, lake water, or tap water, with an initial temperature close to ambient temperature. In some embodiments, the temperature range of this ambient temperature water is between 15 and 25°C. This ambient temperature water is transported (e.g., via a water pump) to the cooling system of the high-intensity magnetizer (such as a cooling coil wound on the yoke) to cool the high-intensity magnetizer that generates high heat during operation. During this heat exchange process, the ambient temperature water absorbs the waste heat generated by the high-intensity magnetizer, and its own temperature rises significantly, thereby forming cooling hot water. As a feasible embodiment, after heat exchange, the temperature range of the cooling hot water can reach 25 to 40°C. This portion of hot water carries the low-temperature waste heat that was originally directly discarded.

[0023] Step a above utilizes the cooling hot water generated by the strong magnetic generator as a heat source to recover and reuse waste heat, reducing dependence on traditional external energy sources and saving production costs.

[0024] Step b: Divide a portion of the cooling hot water into a first water flow and a second water flow.

[0025] In this process, flow diversion refers to dividing a single total water flow into multiple streams according to a preset or adjustable ratio using structures such as three-way valves, distribution valves, or parallel pipelines. In this step, a specific flow rate is diverted from the total cooling hot water obtained in step a and further divided into two independent water flow paths: the first stream and the second stream. These provide suitable water and heat sources for different subsequent heating stages. The first stream is the object being heated and enters the subsequent heating process; the second stream serves as the low-temperature heat source driving the water source heat pump. The diversion ratio can be optimized and adjusted based on the heat output of the strong magnetic generator, the required hot water temperature, and the flow rate. For example, the flow rate ratio of the first stream to the second stream is 1:(1~20). As a specific embodiment, the total flow rate of this diverted cooling hot water can be in the range of 30~250 m³ / h, with the first stream flow rate being 10~60 m³ / h and the second stream flow rate being 10~200 m³ / h. For example, in a large-capacity ore processing plant, the first flow rate is 50 m³ / h, the second flow rate is 150 m³ / h, the ratio is 1:3, and the total diversion flow rate is 200 m³ / h.

[0026] Step c: The first water flow is fed into the air source heat pump for initial heating to obtain hot water at the first temperature.

[0027] An air source heat pump is a device that uses electricity to absorb low-grade heat energy from the ambient air and elevate it to high-grade heat energy. Its energy efficiency ratio is typically much higher than that of direct electric heating. A first stream of water (i.e., cooled hot water from a strong magnetic generator, e.g., 30°C) is introduced into the evaporator side (or user-side heat exchanger) of the air source heat pump. The heat extracted from the ambient air by the air source heat pump is used to initially heat the water stream. Through this process, the water temperature is raised to an intermediate temperature, i.e., the first temperature hot water. In some embodiments, the temperature range of the first temperature hot water is 40~50°C. This step fully utilizes the free heat energy in the ambient air, provides initial enhancement of waste heat, and is highly energy-efficient.

[0028] Step d: The first temperature water flow is fed into the water source heat pump for a second heating, and the second water flow is fed into the heat source side of the water source heat pump as a heat source for the second heating, so as to obtain hot water at a second temperature higher than the first temperature.

[0029] A water source heat pump is a heat pump system that uses water (such as groundwater, surface water, or industrial wastewater) as a heat source or heat sink. In this step, two water streams work together: one is the first-temperature hot water (e.g., 45°C) obtained in step c, which is introduced into the condenser side of the water source heat pump (i.e., the user side) as the object to be further heated; the other is the second water stream (e.g., 30°C cooled hot water) branched off in step b, which is introduced into the evaporator side of the water source heat pump (i.e., the heat source side). When the water source heat pump is running, its compressor performs work, extracting waste heat from the relatively lower-temperature second water stream (heat source side), raising the grade of this heat energy, and then releasing the raised high-grade heat energy to the first-temperature hot water (user side), thereby reheating the first-temperature hot water and further raising its temperature to the second-temperature hot water. The second-temperature hot water is higher than the first-temperature hot water; in some embodiments, its temperature can reach 65~85°C. By utilizing the waste heat from a portion of the hot water (second stream) cooled by a strong magnetic generator, another portion of the pre-heated water (following the first stream) is heated to the high temperature required by the process through heat pump technology, thus achieving the graded, efficient extraction and utilization of energy from the same stream of waste heat.

[0030] In steps b to d above, an air source heat pump is used for initial heating, and then a water source heat pump using another portion of the cooled hot water as a heat source is used for secondary heating. This two-stage heating mode is efficient and synergistic, and can stably produce hot water at the first and second temperatures with minimal temperature fluctuations.

[0031] Step e: Supply hot water at the second temperature to the primary preparation process of the flotation reagent, and supply hot water at the first temperature to the secondary preparation process of the flotation reagent.

[0032] The preparation of flotation reagents typically requires hot water at different temperatures. For example, primary preparation (such as the dissolution or pre-activation of certain main reagents) requires hot water at higher temperatures (e.g., 65-85°C), while secondary preparation (such as the dilution or mixing of auxiliary reagents) requires hot water at relatively lower temperatures (e.g., 40-50°C). The second-temperature and first-temperature hot water produced by this method precisely meet the temperature requirements of these two different processes. Through independent insulated conveying pipelines and flow control valves, these two types of stable-temperature hot water are separately and directionally transported to their respective preparation sections, thus solving the problems of single-temperature, large fluctuations, and poor compatibility with multi-stage preparation processes in existing technologies, ensuring the quality and effectiveness of reagent preparation.

[0033] Step e above supplies two different temperatures of hot water to the primary and secondary preparation processes of flotation reagents, respectively, achieving a precise match between heat output and production needs, and ensuring the reagent preparation effect and the stability of mineral processing production.

[0034] The above-mentioned method for staged heating of flotation reagent preparation water based on the waste heat of strong magnetic generator cooling achieves efficient recovery and tiered utilization of waste heat of strong magnetic generator cooling, can simultaneously produce two stable hot waters at different temperatures, and precisely match the flotation reagent preparation process, thereby solving the existing problems of energy waste, high cost and mismatch of hot water supply.

[0035] According to several embodiments of the present invention, the method for staged heating of flotation reagent preparation water based on the waste heat from the cooling of a high-intensity magnetic generator further includes: step f, cooling the remaining portion of the cooling hot water after diversion (i.e., the portion of cooling hot water not diverted for heating in the first and second paths), and then returning it to the cooling heat exchange process in step a. Further, the cooling treatment in step f is achieved through a cooling tower, and the water temperature after cooling treatment is not higher than 22°C. The cooling tower lowers the water temperature through direct or indirect contact between water and air, utilizing the principles of evaporative heat dissipation and sensible heat exchange. For example, the remaining cooling hot water at approximately 30°C is sent to the cooling tower, and the water temperature can be reduced to 20°C after treatment. Then, it is returned to the cooling water pool of the high-intensity magnetic generator by gravity or pump and reused for cooling the high-intensity magnetic generator. This process achieves a closed-loop circulation of water resources, greatly improving water resource utilization. Only a small amount of fresh room-temperature water lost due to evaporation, splashing, or diversion (i.e., makeup water) needs to be added to maintain the system's water balance.

[0036] According to several embodiments of the present invention, the temperature of the ambient temperature water added in step a is controlled at 15~25°C; the temperature of the cooling hot water produced after heat exchange by the strong magnetic generator is 25~40°C. The first temperature hot water obtained in step c is preferably controlled at 40~50°C; the second temperature hot water finally obtained in step d is preferably controlled at 65~85°C. These temperature ranges are derived based on extensive experience in mineral processing plants and the high-efficiency operating range of heat pumps, ensuring a good match between waste heat recovery efficiency and final water demand.

[0037] To ensure the continuity and stability of hot water supply and alleviate the imbalance between instantaneous water use and continuous heating, this invention also includes a hot water storage step. After obtaining hot water at a first temperature in step c, it can be transported and stored in a first insulated water tank. Similarly, after obtaining hot water at a second temperature in step d, it can be transported and stored in a second insulated water tank. The insulated water tank is equipped with an insulation layer (such as polyurethane foam), a temperature sensor, and a level gauge. As a specific embodiment, the effective volume of the first insulated water tank is 20~120m³, used to store hot water at 40~50℃; the effective volume of the second insulated water tank is 10~60m³, used to store hot water at 65~85℃. The tank volume design takes into account the batch usage of the pharmaceutical preparation process, the capacity of the heating system, and buffering requirements.

[0038] According to several embodiments of the present invention, the replenishment flow rate of ambient temperature water is determined based on the total consumption of the first and second water flows. It is understood that to ensure the long-term stable operation of the entire cooling-heating-circulation system, it is necessary to continuously replenish the ambient temperature water lost due to diversion consumption, evaporation, etc., to the high-intensity magnetic generator cooling water system. This replenishment flow rate is not a fixed value, but is dynamically or preset based on the total consumption of the first and second water flows after being diverted and ultimately used for reagent preparation (i.e., permanently or temporarily removed from the cooling water system), combined with the evaporation loss of the cooling tower. For example, if the total diversion consumption of the first and second water flows is 90 m³ / h, and the evaporation loss of the cooling tower is approximately 10 m³ / h, then the total ambient temperature water replenishment flow rate can be set to approximately 100 m³ / h. This reflects the intelligent control of the system's water balance, achieving efficient utilization of waste heat while maximizing the conservation of fresh water consumption.

[0039] Please Figure 1 Based on this, further reference Figure 2 , Figure 2 The diagram shown illustrates a process flow diagram of a method for staged heating of flotation reagent preparation water based on waste heat from a strong magnetic generator cooling system, according to another embodiment of the present invention. The technical solution of the present invention will be further described below with reference to specific embodiments.

[0040] Example 1 This invention illustrates a specific application of its technical solution in a cooling system for a high-intensity magnetic generator in a mineral processing plant. S11. Preparation and Collection of Cooling Hot Water Clean, ambient temperature water at 20°C is continuously added to the cold water tank of the high-intensity magnet generator cooling system at a rate of 20 m³ / h. This ambient temperature water mixes with the existing circulating water in the cold water tank and is then introduced into the cooling coils of the high-intensity magnet generator for heat exchange. The resulting water output is hot cooling water with a temperature increased to 28°C, with a total flow rate of 660 m³ / h. This hot cooling water flows by gravity through collection pipes to the hot water tank of the high-intensity magnet generator cooling system.

[0041] S12, Cooling hot water diversion The cooling hot water in the hot water tank is divided into three streams through a pipeline diversion structure. The first stream (which serves as the water source for subsequent heating) has a flow rate of 20 m³ / h; the second stream (which serves as the heat source for the subsequent water source heat pump) has a flow rate of 70 m³ / h; and the third stream (the remaining portion) has a flow rate of 570 m³ / h (i.e., 660 m³ / h - 20 m³ / h - 70 m³ / h).

[0042] S13, Primary heating and storage The first water flow (20 m³ / h, 28℃) is fed into an air-source heat pump for initial heating, reaching 45℃. The resulting hot water (45℃) is stored in a first insulated water tank (which can be referred to as the 45℃ water tank) with an effective volume of 80 m³ for later use. This tank is equipped with insulation, a temperature sensor, and a level gauge, maintaining a stable water temperature within the range of 45℃ ± 0.5℃. It can supply approximately 30 m³ of water at a time, depending on the needs of reagent preparation.

[0043] S14, Deep Heating and Storage Hot water at 45℃ from the first insulated water tank is pumped to the user side (heat absorption side) of the water source heat pump. Simultaneously, a second water flow (70 m³ / h, 28℃) is introduced into the heat source side (heat release side) of the water source heat pump as the driving heat source. The water source heat pump operates, utilizing the waste heat from the second water flow to reheat the 45℃ hot water to 80℃. The resulting hot water at 80℃ is stored in a second insulated water tank (which can be called the 80℃ water tank) with an effective volume of 40 m³ for later use. This tank is also equipped with insulation and monitoring instruments, maintaining a stable water temperature within the range of 80℃ ± 0.5℃, with a single water supply volume of approximately 10 m³.

[0044] S15, Hot Water Application The 80℃ hot water in the second insulated water tank is transported to the primary preparation stage of the flotation reagents through the primary preparation pipeline; the 45℃ hot water in the first insulated water tank is transported to the secondary preparation stage of the flotation reagents through the secondary preparation pipeline. The water supply is regulated by flow control valves on each pipeline to precisely match the rhythm and requirements of different preparation stages.

[0045] S16, Cooling water circulation The third water flow (570 m³ / h, approximately 28°C) is introduced into the cooling tower for cooling. After the temperature drops to 20°C, the water flows back to the cold water pool of the strong magnet cooling system via the return water pipe, thus achieving recycling.

[0046] S17, Automation Control In the above process, all temperature sensors, level gauges, flow control valves, pumps, and heat pumps are connected to a PLC central automation control system. The system monitors parameters such as water temperature, level, and flow rate in real time, and automatically adjusts the equipment operating status (such as starting and stopping heat pumps, adjusting valve opening, and controlling water replenishment), enabling fully unattended operation.

[0047] This embodiment achieves efficient recovery and cascaded utilization of waste heat from the cooling of the high-intensity magnetic flux generator. Calculations show that the system's waste heat utilization rate reaches 88%, saving approximately 45% energy compared to traditional direct electric heating methods, and the water resource recycling rate reaches 98%. The supplied 45℃ and 80℃ hot water temperatures exhibit minimal fluctuations, stably meeting the process requirements for flotation reagent preparation, effectively improving the continuity and overall efficiency of mineral processing.

[0048] Example 2 This demonstrates the application of the present invention on the scale of another ore processing plant, with the same steps and principles as in Example 1, and the specific parameters are as follows: S11. Preparation and Collection of Cooling Hot Water Add 15 m³ / h of room temperature water at 19°C. After heat exchange by a strong magnetic generator, the room temperature water is transformed into 29.5°C cooling hot water with a total flow rate of 480 m³ / h.

[0049] S12, Cooling hot water diversion The flow rate of the first water channel is 15 m³ / h; the flow rate of the second water channel is 45 m³ / h; and the flow rate of the third water channel is 420 m³ / h.

[0050] S13, Primary heating and storage The first stream of water is heated to 45°C by an air-source heat pump and stored in a first insulated water tank (45°C tank) with an effective volume of 60m³. The water temperature is stabilized at 44.8~45.2°C, and the single water supply volume is approximately 25m³.

[0051] S14. Deep Heating and Storage: The 45℃ hot water in the first insulated water tank is heated to 80℃ by a water source heat pump (using a second flow of 45m³ / h, 29.5℃ water as the heat source), and then stored in a second insulated water tank (80℃ tank) with an effective volume of 30m³. The water temperature is stabilized at 79.8~80.2℃, and the single water supply volume is approximately 5m³.

[0052] S15, Hot Water Application 80℃ hot water is supplied to the first-stage preparation process, and 45℃ hot water is supplied to the second-stage preparation process, with valves used to adjust the supply to meet demand.

[0053] S16, Cooling water circulation The third water flow (420 m³ / h) is cooled to 21°C by the cooling tower and then returned to the cold water pool for circulation.

[0054] S17, Automation Control Automated operation is achieved using a PLC control system similar to that in Example 1.

[0055] According to calculations, the waste heat utilization rate of this embodiment reaches 86%, which saves about 44% energy compared with traditional electric heating. The water resource recycling rate reaches 97%, and the hot water supply is stable, meeting the flotation reagent preparation and other possible industrial hot water needs of the mineral processing plant, and significantly reducing operating costs.

[0056] Example 3 This demonstrates a specific application of the solution in scenarios with lower production loads or lower hot water demand. S11. Preparation and Collection of Cooling Hot Water Clean, ambient temperature water at 15°C is added to the cooling system of the high-intensity magnetic generator at a rate of 10 m³ / h. After heat exchange by the high-intensity magnetic generator, the ambient temperature water is converted into cooling hot water at 25°C with a total flow rate of 300 m³ / h.

[0057] S12, Cooling hot water diversion The cooling hot water is divided into three streams. The first stream has a flow rate of 10 m³ / h; the second stream has a flow rate of 10 m³ / h; and the third stream (the remaining portion) has a flow rate of 280 m³ / h.

[0058] S13, Primary heating and storage The first water flow (10 m³ / h, 25℃) is heated to 40℃ by an air-source heat pump. The resulting hot water is stored in a first insulated water tank with an effective volume of 20 m³.

[0059] S14, Deep Heating and Storage Hot water at 40°C from the first insulated water tank is supplied to the user side of the water source heat pump, while a second water flow (10 m³ / h, 25°C) is supplied to the heat source side of the water source heat pump. After being heated by the water source heat pump, hot water at a second temperature of 65°C is obtained and stored in a second insulated water tank with an effective volume of 10 m³.

[0060] S15, Hot Water Application 65℃ hot water is used for primary preparation, and 40℃ hot water is used for secondary preparation.

[0061] S16, Cooling water circulation The third water flow (280 m³ / h) is cooled to approximately 21°C by the cooling tower before returning to the circulation system.

[0062] S17, Automation Control It operates stably through the control system.

[0063] Example 4 This demonstrates the specific application of this solution in scenarios with high production loads and high hot water demand. S11. Preparation and Collection of Cooling Hot Water Add 25°C ambient temperature water to the cooling system of the high-intensity magnetic generator at a rate of 40 m³ / h. After heat exchange by the high-intensity magnetic generator, the ambient temperature water forms 40°C cooling hot water with a total flow rate of 1000 m³ / h.

[0064] S12, Cooling hot water diversion The first branch of the diverted water has a flow rate of 60 m³ / h; the second branch has a flow rate of 200 m³ / h; and the third branch has a flow rate of 740 m³ / h.

[0065] S13, Primary heating and storage The first water flow (60 m³ / h, 40℃) is heated to 50℃ by an air-source heat pump. The resulting hot water is stored in a first insulated water tank with an effective volume of 120 m³.

[0066] S14, Deep Heating and Storage Hot water at 50°C from the first insulated water tank is supplied to the user side of the water source heat pump, while a second water flow (200 m³ / h, 40°C) is supplied to the heat source side of the water source heat pump. After being heated by the water source heat pump, hot water at a second temperature of 85°C is obtained and stored in a second insulated water tank with an effective volume of 60 m³.

[0067] S15, Hot Water Application 85℃ hot water is used for primary preparation, and 50℃ hot water is used for secondary preparation.

[0068] S16, Cooling water circulation The third water flow (740 m³ / h) is cooled to approximately 22°C by the cooling tower before being returned to the circulation system.

[0069] S17, Automation Control It operates stably through the control system.

[0070] As can be seen from the above embodiments 1-5, this solution achieves efficient recovery and cascade utilization of the waste heat from the cooling of the strong magnetizer, can simultaneously produce two stable hot waters at different temperatures, and can precisely match the preparation process of flotation reagents, thereby solving the existing problems of energy waste, high cost, and mismatch in hot water supply.

[0071] The above are exemplary embodiments disclosed in this invention. However, it should be noted that various changes and modifications can be made without departing from the scope of the embodiments of this invention as defined by the claims. The functions, steps, and / or actions of the methods according to the disclosed embodiments described herein do not need to be performed in any particular order. Furthermore, although the elements disclosed in the embodiments of this invention may be described or claimed individually, they may be understood as multiple unless explicitly limited to a singular number.

[0072] It should be understood that, as used herein, the singular form “a” is intended to include the plural form as well, unless the context clearly supports an exception. It should also be understood that, as used herein, “and / or” refers to any and all possible combinations of one or more of the associated listed items.

[0073] The embodiment numbers disclosed in the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0074] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples. Within the framework of the invention, technical features of the above embodiments or different embodiments can be combined, and many other variations of different aspects of the invention exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A method for staged heating of flotation reagent preparation water based on waste heat from strong magnetic field cooling, characterized in that, include: Step a: Pass room temperature water through a strong magnetic generator for cooling and heat exchange to obtain cooled hot water with an increased temperature; Step b: Divide a portion of the cooling hot water into a first water flow and a second water flow; Step c: The first water flow is fed into an air source heat pump for initial heating to obtain hot water at the first temperature; Step d: The first temperature water flow is fed into the water source heat pump for a second heating, and the second water flow is fed into the heat source side of the water source heat pump as the heat source for the second heating, so as to obtain hot water at a second temperature higher than the first temperature. Step e: Supply the hot water at the second temperature to the primary preparation process of the flotation reagent, and supply the hot water at the first temperature to the secondary preparation process of the flotation reagent.

2. The method for staged heating of flotation reagent preparation water based on waste heat from strong magnetic motor cooling according to claim 1, characterized in that, Also includes: Step f: Cool the remaining portion of the hot water after it has been diverted, and then return it to the cooling heat exchange process in step a.

3. The method for staged heating of flotation reagent preparation water based on waste heat from strong magnetic motor cooling according to claim 2, characterized in that, The cooling process in step f is achieved through a cooling tower, and the water temperature after cooling is not higher than 22°C.

4. The method for staged heating of flotation reagent preparation water based on waste heat from strong magnetic motor cooling according to claim 1, characterized in that, The ambient temperature water is 15~25℃, and the temperature of the cooled hot water is 25~40℃.

5. The method for staged heating of flotation reagent preparation water based on waste heat from strong magnetic motor cooling according to claim 1, characterized in that, The temperature of the first temperature water is 40~50℃, and the temperature of the second temperature water is 65~85℃.

6. The method for staged heating of flotation reagent preparation water based on waste heat from strong magnetic motor cooling according to claim 1, characterized in that, In step b, the flow rate ratio of the first water flow to the second water flow is 1:(1~20).

7. The method for staged heating of flotation reagent preparation water based on waste heat from strong magnetic motor cooling according to claim 6, characterized in that, In step b, the flow rate of a portion of the cooling hot water is 30~250 m³ / h, the flow rate of the first water stream is 10~60 m³ / h, and the flow rate of the second water stream is 10~200 m³ / h.

8. The method for staged heating of flotation reagent preparation water based on waste heat from strong magnetic motor cooling according to claim 1, characterized in that, Step c is followed by: The obtained hot water at the first temperature is stored in a first insulated water tank, wherein the volume of the first insulated water tank is 20~120m³.

9. The method for staged heating of flotation reagent preparation water based on waste heat from strong magnetic motor cooling according to claim 1, characterized in that, Step d is followed by: The obtained hot water at the second temperature is stored in a second insulated water tank, wherein the volume of the second insulated water tank is 10~60m³.

10. The method for staged heating of flotation reagent preparation water based on waste heat from strong magnetic motor cooling according to claim 1, characterized in that, The replenishment flow rate of the ambient temperature water is determined based on the total consumption of the first water flow and the second water flow.

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