Method for judging density change at electrolytic separation end point of lead-antimony alloy molten salt
By using floating bodies with a density lower than the melt in the lead-antimony alloy molten salt electrolysis, the change in its immersion depth is monitored in real time, and the problem of insufficient accuracy of the traditional electrolytic separation end point judgment method is solved, and the accurate judgment of the electrolytic separation end point and the efficient electrolysis process are achieved.
Patent Information
- Application Number
- CN202510251937.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2025-04-15
AI Technical Summary
The traditional electrolytic separation end point judgment method in the prior art has the problem of insufficient accuracy, and it is difficult to accurately judge the end point of the electrolytic separation operation.
By selecting floating bodies with a density smaller than that of lead-antimony alloy melt, the floating body is placed on the melt surface during the electrolysis operation of lead-antimony alloy molten salt, the floating body is monitored in real time, and the end point of the electrolytic separation operation is determined by using the threshold for immersion depth change.
It realizes accurate judgment of the end point of electrolytic separation, simplifies the operation process, reduces production costs and operation difficulty, avoids excessive or insufficient electrolysis, and improves electrolytic efficiency and product quality.
Smart Images
Figure CN119824490A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of nonferrous metal smelting, and in particular relates to a method for judging density change at the end point of lead-antimony alloy molten salt electrolysis separation. Background Art
[0002] Brittle lead antimony ore will produce a large amount of lead antimony alloy in the process of extracting metallic lead and antimony. This mineral is abundant in my country, accounting for 30% to 40% of the total antimony ore resources in my country. In industry, the traditional process of boiling roasting-sintering-blast furnace reduction-blowing-refining is often used to treat brittle lead antimony ore concentrate, but this process has the disadvantages of long smelting process, low concentration SO2 pollution, low metal recovery rate and high energy consumption.
[0003] The molten salt electrolysis method for separating lead-antimony alloys has the advantages of fast chemical reaction, short process flow, and high metal direct recovery rate. It can work at high current density and save electricity, has large unit production capacity, and can operate under closed conditions, which is beneficial to environmental protection and improved working conditions. However, this method needs to be operated at a relatively high temperature, the electrolyte is highly corrosive, has high requirements for equipment materials, the electrolytic cell structure is complex, and the purification and recycling of the electrolyte are also troublesome.
[0004] Traditional methods for determining the endpoint of electrolytic separation rely on empirical judgment, timed detection, or chemical analysis. These methods often have the problem of insufficient accuracy and it is difficult to accurately determine the endpoint of the electrolytic separation operation. Summary of the invention
[0005] In order to solve the above technical problems, the present invention provides a method for judging the density change of the end point of lead-antimony alloy molten salt electrolysis separation, so as to solve the problem of insufficient accuracy of the traditional electrolysis separation end point judgment method in the prior art, and the problem that it is difficult to accurately judge the end point of the electrolysis separation operation.
[0006] The method for judging the density change at the end point of lead-antimony alloy molten salt electrolysis separation comprises the following steps:
[0007] Step 1: selecting a floating body, the floating body having a density less than the density of the lead-antimony alloy melt in the initial state and capable of stably floating in the lead-antimony alloy melt;
[0008] Step 2: during the lead-antimony alloy molten salt electrolysis operation, placing the float on the surface of the lead-antimony alloy melt;
[0009] Step 3: Track the electrolysis process by monitoring the density change of the lead-antimony alloy melt. As the electrolysis reaction proceeds, the anode lead oxidizes and enters the electrolyte, causing the density of the lead-antimony alloy melt to change.
[0010] Step 4: real-time monitoring and recording of changes in the immersion depth of the float in the lead-antimony alloy melt, where the changes in the immersion depth are directly related to changes in the density of the lead-antimony alloy melt;
[0011] Step 5: pre-set an immersion depth change threshold value. When the immersion depth change of the float reaches the threshold value, it is determined that the electrolytic separation operation has reached the end point and the electrolysis process is terminated immediately.
[0012] Preferably, the float will not change in the lead-antimony alloy melt due to physical or chemical effects.
[0013] Preferably, step four also includes: using a depth sensor and a data processing system to monitor and record in real time the change in the immersion depth of the float in the lead-antimony alloy melt.
[0014] Preferably, the depth sensor is interconnected with the float to measure the submerged depth of the float in real time and transmit the data to a data processing system for recording and analysis.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] By utilizing the change in the immersion depth of the float in the lead-antimony alloy melt to indirectly reflect the change in the melt density, the end point of the electrolytic separation operation can be accurately judged. This method is easy to operate, does not require complex equipment and chemical analysis, reduces production costs and operating difficulties, and at the same time, due to accurate judgment, it can avoid excessive or insufficient electrolysis and improve electrolysis efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0019] like Figure 1 As shown:
[0020] Embodiment 1: The present invention provides a method for determining the density change at the end point of lead-antimony alloy molten salt electrolysis separation, which is characterized by comprising the following steps:
[0021] Step 1: Select a floating body, the density of which is less than the density of the lead-antimony alloy melt in the initial state, and which can stably float in the lead-antimony alloy melt;
[0022] Step 2: during the lead-antimony alloy molten salt electrolysis operation, placing a floating body on the surface of the lead-antimony alloy melt;
[0023] Step 3: Track the electrolysis process by monitoring the density change of the lead-antimony alloy melt. As the electrolysis reaction proceeds, the anode lead oxidizes and enters the electrolyte, causing the density of the lead-antimony alloy melt to change.
[0024] Step 4: real-time monitoring and recording of changes in the immersion depth of the float in the lead-antimony alloy melt, where the changes in the immersion depth are directly related to changes in the density of the lead-antimony alloy melt;
[0025] Step 5: pre-set an immersion depth change threshold value. When the immersion depth change of the float reaches the threshold value, it is determined that the electrolytic separation operation has reached the end point and the electrolysis process is terminated immediately.
[0026] From the above, it can be seen that this method selects a float with a density lower than the initial density of the lead-antimony alloy melt to ensure that it can float stably in the melt; then, during the electrolysis operation, the float is placed on the surface of the melt, and the electrolysis process can be indirectly tracked by continuously monitoring the immersion depth of the float; as the anode lead is continuously oxidized and enters the electrolyte, the density of the lead-antimony alloy melt changes accordingly, and this change is directly reflected in the change in the immersion depth of the float; through the pre-set immersion depth change threshold, we can accurately judge whether the electrolysis separation operation has reached the end point and terminate the electrolysis process in time; this method is not only easy to operate, but also accurate in judgment, and provides an efficient and reliable endpoint judgment method for lead-antimony alloy molten salt electrolysis separation.
[0027] Embodiment 2: This embodiment is basically the same as the previous embodiment, except that the float will not change in the lead-antimony alloy melt due to physical or chemical effects.
[0028] As can be seen from the above, this embodiment ensures the accuracy and reliability of the electrolytic separation endpoint judgment by using a floating body with stable physical and chemical properties in the lead-antimony alloy melt.
[0029] Embodiment 3: This embodiment is basically the same as the previous embodiment, except that step 4 also includes: using a depth sensor and a data processing system to monitor and record the changes in the immersion depth of the float in the lead-antimony alloy melt in real time.
[0030] Specifically, the depth sensor is interconnected with the float to measure the submerged depth of the float in real time and transmit the data to the data processing system for recording and analysis.
[0031] From the above, it can be seen that this embodiment realizes real-time monitoring and accurate recording of the immersion depth of the float by introducing a depth sensor and a data processing system, further improves the accuracy and automation of the electrolytic separation endpoint judgment, and provides strong support for the optimization and control of the lead-antimony alloy molten salt electrolysis process.
[0032] Application Process:
[0033] 1. Materials and Equipment Preparation
[0034] Float material: High-purity, high-temperature-resistant and corrosion-resistant ceramic materials are selected as floats, and their density is precisely measured to ensure that it is lower than the density of the lead-antimony alloy melt in its initial state.
[0035] Lead-antimony alloy: prepare a certain proportion of lead and antimony metals and make a lead-antimony alloy melt by melting and mixing.
[0036] Molten salt: Select molten salt suitable for lead-antimony alloy electrolysis, such as sodium chloride-potassium chloride mixed molten salt.
[0037] Depth sensor: A high-precision, high-temperature resistant depth sensor is connected to the float to measure the immersion depth of the float in real time.
[0038] Data processing system: Equipped with a data processing system to receive, record and analyze the data transmitted by the depth sensor.
[0039] 2. Implementation steps
[0040] Float preparation: Pre-treat the ceramic float to ensure that its surface is smooth and free of cracks, and measure its density to confirm that it meets the requirements for use.
[0041] Electrolysis device construction: Pour the lead-antimony alloy melt and molten salt into the electrolytic cell and heat them to a molten state. Then, place the float on the surface of the melt to ensure that it floats stably.
[0042] Electrolysis operation starts: The electrolysis device is started and electrolysis operation begins. At the same time, the depth sensor is connected to the floating body and the data is transmitted to the data processing system.
[0043] Real-time monitoring: During the electrolysis process, the data processing system monitors the change in the immersion depth of the float in real time. As the electrolysis reaction proceeds, the anode lead oxidizes and enters the electrolyte, causing the density of the lead-antimony alloy melt to change. This change is directly reflected in the change in the immersion depth of the float.
[0044] End point judgment: A threshold value of immersion depth change is set in advance. When the immersion depth change of the float reaches the threshold, the data processing system will automatically issue an alarm to indicate that the electrolysis separation operation has reached the end point. At this time, the electrolysis process should be terminated immediately.
[0045] Subsequent treatment: After the electrolysis is completed, the electrolysis device is turned off and the melt and float are removed from the electrolytic cell. Samples of the melt are analyzed to confirm the separation effect of lead and antimony. At the same time, the float and sensor are cleaned and maintained for next use.
[0046] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can all be customized according to the description and the drawings. The specific connection methods of each part all adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.
[0047] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.
[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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.
[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.
[0051] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.
[0052] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A method for determining the density change at the end point of lead-antimony alloy molten salt electrolysis separation, characterized in that: The following steps are involved: Step 1: selecting a floating body, the floating body having a density less than the density of the lead-antimony alloy melt in the initial state and capable of stably floating in the lead-antimony alloy melt; Step 2: during the lead-antimony alloy molten salt electrolysis operation, placing the float on the surface of the lead-antimony alloy melt; Step 3: Track the electrolysis process by monitoring the density change of the lead-antimony alloy melt. As the electrolysis reaction proceeds, the anode lead oxidizes and enters the electrolyte, causing the density of the lead-antimony alloy melt to change. Step 4: monitor and record in real time the change in the immersion depth of the float in the lead-antimony alloy melt, where the change in the immersion depth is directly related to the change in the density of the lead-antimony alloy melt; Step 5: pre-set an immersion depth change threshold value. When the immersion depth change of the float reaches the threshold value, it is determined that the electrolytic separation operation has reached the end point and the electrolysis process is terminated immediately.
2. The method for determining the density change at the end point of lead-antimony alloy molten salt electrolysis separation according to claim 1, characterized in that: The floating body will not change in the lead-antimony alloy melt due to physical or chemical effects.
3. The method for determining the density change at the end point of lead-antimony alloy molten salt electrolysis separation according to claim 1, characterized in that: Step four also includes: using a depth sensor and a data processing system to monitor and record in real time the change in the immersion depth of the float in the lead-antimony alloy melt.
4. The method for determining the density change at the end point of lead-antimony alloy molten salt electrolysis separation according to claim 3, characterized in that: The depth sensor is connected to the float and is used to measure the submerged depth of the float in real time and transmit the data to the data processing system for recording and analysis.