CN115945289A - Lime milk preparation and pump pipe adding system and method - Google Patents
Lime milk preparation and pump pipe adding system and method Download PDFInfo
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- CN115945289A CN115945289A CN202211726457.1A CN202211726457A CN115945289A CN 115945289 A CN115945289 A CN 115945289A CN 202211726457 A CN202211726457 A CN 202211726457A CN 115945289 A CN115945289 A CN 115945289A
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Abstract
The invention provides a lime milk preparation and pump pipe adding system and method, which greatly relieve the operation strength of a disintegrating mill device of a lime milk preparation system and improve the capacity and efficiency of disintegrating lime by additionally arranging a lime milk storage pool and improving pump pipe pipeline equipment and a structure.
Description
Technical Field
The invention relates to the technical field of lead-zinc ore separation flotation, in particular to a system and a method for preparing lime milk and adding lime milk to a pump pipe.
Background
The Duda lead-zinc ore is high-sulfur complex refractory lead-zinc ore, and the mineral analysis result shows that the ore contains 60-80% of white iron ore, pyrite and silicate minerals except 12-18% of the lead-zinc ore. In order to obtain a high-quality lead-zinc concentrate product, a lead-zinc preferential separation flotation process flow is generally adopted to perform lead-zinc preferential separation flotation.
In the process of lead-zinc preferential separation flotation, lime milk is needed to adjust the pH value of ore pulp so as to strongly inhibit the upward floating of the pyrite, the pyrite and the silicate minerals, and meanwhile, a large amount of lime is needed to adjust the pH value of the ore pulp so as to inhibit the upward floating of the non-target minerals. Therefore, a lime milk preparation and addition system is specially constructed in the Duda concentrating mill, so that lime milk is required to be added in the lead-zinc flotation process, the pH value of ore pulp is adjusted, the upward floating of the marcasite and the pyrite is inhibited, and the efficient separation flotation of lead, zinc, iron and sulfur is realized.
The application of lime milk in adjusting the pH value of ore pulp in a dressing plant is wide, most lime milk prepared is firstly pumped to a high-level storage tank according to the lime consumption required in the dressing production process, then a pipeline is installed and automatically flows to an operation point of a dressing flotation process where the lime milk needs to be added, and a PLC automatic dosing control device is conditionally used. However, due to the nature of lime milk and the existence of fine-particle lime, impurities and the like, the situations of lime pipeline blockage, gate valve blockage, pipeline calcium accumulation, inaccurate addition and the like can be generated in the process of mineral separation production and use, regular washing and cleaning are required, and large investment and maintenance cost are required for installing a PLC dosing machine.
However, because the quality of local quick lime (blocks) purchased on site is unstable, the purchased quick lime needs to be crushed, ground and stirred to prepare lime milk solution, and then the lime milk solution is conveyed to an operation point where lime milk needs to be added for lead-zinc flotation by a slurry pump. The lime milk preparation and addition process has many unstable factors, for example, the purchased quick lime quality (content of active ingredient CaO) is unstable, the lime crushing and grinding process is unstable, the coarse and fine particles are not uniform, the hydration and emulsification effects of the quick lime are different, the air breathing and the conveying pressure in the lime pump conveying process are unstable, and the unstable factors cause the unstable lime adding amount in the lead-zinc flotation operation, the unstable pressure in the pipeline conveying process and other problems.
Therefore, a scheme capable of improving the accuracy of adding lime milk to the lead-zinc flotation operation point is needed.
Disclosure of Invention
In view of the above problems, the present invention provides a system and a method for preparing lime milk and adding lime milk to a pump pipe, so as to solve many problems of the existing system for preparing and adding lime milk.
The invention provides a lime milk preparation and pump pipe adding system, which comprises:
the lime milk crude liquid preparation unit is used for crushing, grinding and stirring purchased quicklime to prepare lime milk crude liquid;
the lime milk storage pool is used for storing the lime milk crude liquid prepared by the lime milk crude liquid preparation unit so as to ensure that fine-particle quicklime in the lime milk crude liquid is fully hydrated and emulsified to form lime milk fine liquid;
the pump pipe adding unit is used for conveying the lime milk fine liquid in the lime milk storage pool to a lime milk adding operation point for lead-zinc flotation through a conveying pipeline by a slurry pump;
the pump pipe adding unit comprises a slurry pump arranged at the outlet end of the lime milk storage pool, a main pipeline led out from the slurry pump to the vicinity of a lead-zinc flotation operation point, and a slave pipeline led out from the main pipeline to the lead-zinc flotation operation point.
In the scheme, the lime milk storage pool is additionally arranged, so that the operation strength of the crushing and grinding equipment of the lime milk preparation system is greatly relieved, the capacity and efficiency of crushed and ground quick lime are improved, the capacity of the lime pool is sufficient, the continuous hydration digestion and emulsification of fine particle quick lime are promoted, and compared with the existing lime milk preparation system, the lime milk preparation efficiency and the emulsification effect are improved.
Wherein, optionally, the main pipeline extends to the return end of the lime milk storage tank after passing through the lead-zinc flotation operation point.
Optionally, an outlet pressure gauge is disposed at a position of the main pipe close to the outlet end, and an outlet gate valve is disposed between the outlet pressure gauge and the outlet end.
The main pipeline is provided with a return port pressure gauge at a position close to the return port end, and a return port gate valve is arranged between the return port pressure gauge and the return port end.
In the above-mentioned scheme, form closed loop pipeline through the power that increases the lime pump and extension trunk line to at end installation control gate valve for pressure around the stable lime breast pipeline of regulation and control keeps closed loop pipeline front and back end pressure differential to change in the minizone, provides very big convenience for each operation point adds lime breast regulation flow.
Wherein, the optional scheme is that a total flow meter is arranged on the main pipeline close to the outlet pressure gauge.
Wherein, optionally, a small gate valve and a flowmeter are arranged on the secondary pipeline.
According to the scheme, the flowmeter and the gate valve are installed at the operation point where lime milk needs to be added in lead-zinc flotation, so that an operator can conveniently regulate and control the flow of the lime milk on site until the pH value of ore pulp at the operation point meets the process requirement, and a basic guarantee is provided for regulating and controlling the alkaline ore pulp condition by lead-zinc flotation.
Wherein, optionally, the capacity of the lime milk storage tank is 300M 3 。
On the other hand, the invention also provides a lime milk preparation and pump pipe adding method, which utilizes the lime milk preparation and pump pipe adding system to prepare lime milk and add lime milk into a pump pipe, and comprises the following steps:
crushing, grinding and stirring purchased quicklime to prepare lime milk crude liquid;
storing the lime milk crude liquid through a lime milk storage pool, so that fine-particle quicklime in the lime milk crude liquid is fully hydrated and emulsified in the lime milk storage pool to form lime milk fine liquid;
pumping the lime milk fine liquid in the lime milk storage pool from the outlet end of the lime milk storage pool through a slurry pump, and conveying the lime milk fine liquid to a lime milk adding operation point for lead-zinc flotation through a main pipeline and a pipeline.
Wherein, optional scheme is, after the lime milk that transports to lead zinc flotation through the trunk line and from the pipeline adds the operation point, still include: returning the lime milk which fails to flow into the lime milk adding operation point in the main pipeline to the lime milk storage tank through a return port end of the lime milk storage tank.
According to the lime milk preparation and pump pipe adding system and method, the lime milk storage pool, the pressure meter and the control gate valve are additionally arranged, and the formed pump pipe is used for conveying and adding lime milk, so that the pressure stabilizing and flow stabilizing regulation and control scheme is adopted, the effect of adding lime milk in lead-zinc flotation operation is improved, unnecessary loss and waste are reduced, the lime consumption is reduced by more than 35%, and the strength of blockage of coarse particles in a pipeline, manual cleaning and the like is greatly reduced. The invention has the advantages of small engineering investment, easy implementation, convenient field operation regulation and control and obvious application effect, is widely used in similar mines, greatly improves the regulation and control capability of stable pressure and stable flow of lime milk conveyed and added by a pump pipe, improves the accuracy of lime milk adding amount at a lead-zinc flotation operation point, particularly greatly reduces the phenomena of non-uniformity, blockage cleaning and waste of a lime milk adding system for quick lime with unstable source and quality, and greatly reduces the consumption of lime.
To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Further, the present invention is intended to include all such aspects and their equivalents.
Drawings
Other objects and results of the present invention will become more apparent and readily appreciated by reference to the following description taken in conjunction with the accompanying drawings, and as the invention becomes more fully understood. In the drawings:
FIG. 1 is a schematic diagram of a logical structure of a lime milk preparation and pump line addition system according to an embodiment of the present invention;
FIG. 2 is a schematic plan view of a lime milk preparation and pump line addition system according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a lime milk preparation and pump pipe addition method according to an embodiment of the invention.
Wherein the reference numerals include:
the device comprises a lime milk crude liquid preparation unit 100, a lime storage yard 110, a lime crusher 120, a lime ball mill 130, a spiral classifier 140, a lime milk storage tank 200, a pump pipe adding unit 300, a slurry pump 310, a main pipeline 320, an outlet gate valve 321, an outlet pressure gauge 322, a total flow meter 323, a return pressure gauge 324, a return gate valve 325, a slave pipeline 330, a slave flow meter 331, a slave gate valve 332 and a lead-zinc flotation operation point 400.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.
For the purpose of describing the lime milk preparation and pump line adding system and method of the present invention in detail, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 and 2 show the logical structure and the plane structure of a lime milk preparation and pump line addition system and method, respectively, according to an embodiment of the invention.
As shown in fig. 1 and fig. 2, the lime milk preparation and pump line adding system according to the embodiment of the present invention mainly includes a lime milk crude liquid preparation unit 100, a lime milk storage tank 200, and a pump line adding unit 300.
Wherein, the lime cream crude liquid preparation unit 100 is used for crushing, grinding and stirring purchased quicklime to prepare lime cream crude liquid; a lime milk storage tank 200 for storing the lime milk crude liquid prepared by the lime milk crude liquid preparation unit so as to make the fine particle quicklime in the lime milk crude liquid fully hydrated and emulsified to form lime milk fine liquid; and the pump pipe adding unit 300 is used for conveying the lime milk fine liquid in the lime milk storage pool to a lime milk adding operation point for lead-zinc flotation through a conveying pipeline by a slurry pump.
Specifically, the lime cream crude preparation unit 100 includes, as an example, a quicklime yard 110, a quicklime crusher 120, a quicklime ball mill 130, and a spiral classifier 140. The quicklime storage yard 110 is used for stacking quicklime raw materials to be processed, the quicklime crusher 120 is used for crushing the quicklime raw materials, the quicklime ball mill 130 is used for ball-milling the crushed quicklime raw materials, the quicklime subjected to ball-milling is sent to the spiral classifier 140 for separation, the separated fine quicklime materials enter the lime emulsion pool 200 for storage and continuous hydration and emulsification, and the separated coarse quicklime materials continue to enter the quicklime ball mill 130 for ball-milling.
The pump pipe adding unit 300 comprises a slurry pump 310 and a conveying pipe, wherein the slurry pump 310 is arranged at the outlet end of the lime milk storage pool 200 and is used for pumping the lime milk in the lime milk storage pool 200 into the conveying pipe.
The transfer pipe further includes a master pipe 320 and a slave pipe 330. The main pipe 320 is connected with the slurry pump 310 and used for conveying the lime emulsion pumped out from the slurry pump 310 to the vicinity of the lead-zinc flotation operation point, and a plurality of secondary pipes 330 are connected to the main pipe 320 and used for leading out the lime emulsion from the main pipe 320 to the lead-zinc flotation operation point.
The lead-zinc flotation operation points 400 may include lead concentration addition points, lead roughing addition points, zinc concentration addition points, and the like according to the operation requirements of the ore dressing site.
In the scheme of the invention, by additionally arranging the lime milk storage pool, the operation strength of the grinding equipment of the lime milk preparation system can be greatly relieved, the capacity and the efficiency of grinding quicklime are improved, the capacity of the lime pool is sufficient, the continuous hydration digestion and emulsification of fine particle quicklime are promoted, and compared with the existing lime milk preparation system, the lime milk preparation efficiency and the emulsification effect are improved. Thereby reduce the lime consumption, reduce unnecessary loss and waste, also can greatly reduce later stage pipeline thick granule simultaneously and block up, need the manual work to go intensity such as clearance.
In a specific embodiment of the invention, the lime milk storage tank has a capacity of 300M 3 Most of the quicklime after the crushing and grinding operation is crushed, digested and emulsified and enters a lime milk storage tank, and part of the fine-particle quicklime enters the lime pool and then can be fully hydrated and emulsified continuously. With the lime milk storage tank, the production capacity of the preparation system, namely the grinding operation, can be properly increased, the original three-shift operation is changed into two-shift operation, and the lime milk amount in the lime milk storage tank is enough to maintain the use amount of more than 8 hours.
In order to further improve the utilization rate of the lime milk and reduce the lime consumption. In one embodiment of the invention, the transport pipe is also optimized.
Specifically, as an example, the slurry pump 310 may be a variable-frequency slurry pump (lime pump) and is provided at the outlet end of the lime milk storage tank 200. The main pipe 320 can be phi 125 pipe. And, after the main pipe 320 conveys the lime milk through the lead-zinc flotation operation point, the main pipe continues to extend to a return end (not labeled in the figure) of the lime milk storage tank 200 to form a relatively "closed loop" pipeline, and the lime milk which fails to flow into the operation point is returned to the lime milk storage tank 200.
Further, in a preferred embodiment of the present invention, pressure gauges are further installed on the front and rear pipes of the closed loop main pipe to detect the pressures in the front and rear main pipes, and a gate valve switch is installed at the end to adjust and maintain the front and rear pressures of the main pipes to be similar, and to return the remaining small flow rate to the lime milk storage tank 200.
Specifically, as an example, an outlet pressure gauge 322 is arranged at a position of the main pipe 320 close to the outlet end of the lime milk storage pool 200, and an outlet gate valve 321 is arranged between the outlet pressure gauge 322 and the outlet end; a return pressure gauge 324 is arranged at the position of the main pipe 320 close to the return end of the lime milk storage pool 200, and a return gate valve 325 is arranged between the return pressure gauge 324 and the return end.
In order to perform overall flow statistics and control on the lime milk pumped out from the lime milk storage tank 200, in an embodiment of the present invention, a total flow meter 323 is further disposed on the main pipe 320 near the outlet pressure gauge 322.
From the main pipe 320 for conveying lime milk, several small pipes (e.g. 4-6, or more) can be installed as the working points from the pipe 330 to the lime milk adding points, and the slave gate valve 332 and the slave flow meter 331 are respectively installed in the slave pipe 330, the amount of lime milk to be added is adjusted by the slave gate valve 332, and the total amount of lime milk to be added at each working point is counted by the slave flow meter 331, so that the flow adjusted by the slave gate valve meets the requirements of each working point, and the production management and control are convenient.
A flowmeter and a gate valve are arranged at an operation point where lime milk is required to be added in lead-zinc flotation, so that an operator can conveniently regulate and control the flow of the lime milk on site until the pH value of ore pulp at the operation point meets the process requirement, and a basic guarantee is provided for regulating and controlling the condition of alkaline ore pulp by lead-zinc flotation.
Above-mentioned lime breast preparation and pump line add system, through the terminal adjusting gate valve of closed loop main pipe line, the pressure size of adjusting the main pipe line, the flow of each lime breast that adds is adjusted to the gate valve of other small pipelines, and through the regulation balance in the short time, the steady voltage stationary flow that realizes lime breast and add. The main technical measure is through installing the frequency conversion sediment stuff pump, and big closed loop trunk line, at closed loop trunk line front and back end installation manometer, closed loop pipeline end installation gate valve switch, through adjusting the gate valve of lime pump frequency conversion and trunk line end, the pressure size and the return volume of regulation and control trunk line, each flotation operation adds some installation gate valve switch and flowmeter and is used for adjusting the lime breast flow size that adds the point, each gate valve switch all can freely be adjusted, also can open at any time as required, the fine particle that exists flows into the operation point in the lime breast, form stifled pipe phenomenon in order to reduce the accumulation of fine particle. When necessary, clean water can be adopted to clean and flush the closed pipeline, and fine-particle lime mud, calcium deposition and the like are cleaned and flushed, so that the blockage phenomenon of the lime milk pipeline is reduced.
Corresponding to the lime milk preparation and pump pipe adding system, the invention also provides a lime milk preparation and pump pipe adding method, which utilizes the lime milk preparation and pump pipe adding system to prepare lime milk and add lime milk into a pump pipe.
Fig. 3 shows a flow of a lime milk preparation and pump line addition method according to an embodiment of the invention. As shown in fig. 3, the lime milk preparation and pump pipe adding method of the embodiment includes the following steps:
crushing, grinding and stirring purchased quicklime to prepare lime milk crude liquid;
storing the lime milk crude liquid through a lime milk storage pool, so that fine-particle quicklime in the lime milk crude liquid is fully hydrated and emulsified in the lime milk storage pool to form lime milk fine liquid;
pumping out lime milk fine liquid in a lime milk storage pool from the outlet end of the lime milk storage pool through a slurry pump, and conveying the lime milk fine liquid to a lime milk adding operation point for lead-zinc flotation through a main pipeline and a secondary pipeline.
In addition, optionally, after being transported to a lime milk adding operation point for lead-zinc flotation through a main pipeline and a pipeline, the lime milk adding operation point further comprises the following steps: returning the lime milk which fails to flow into the lime milk adding operation point in the main pipeline to the lime milk storage tank through a return port end of the lime milk storage tank.
For a more specific implementation of the lime milk preparation and pump line adding method, reference may be made to the description of the lime milk preparation and pump line adding system, and details are not repeated.
According to the lime milk preparation and pump pipe adding system and method provided by the invention, the lime milk storage tank is added to the lime preparation system at first, so that the quicklime which is not fully hydrated and emulsified can be fully hydrated and emulsified after being crushed and ground, and the fine-particle quicklime enters the lime tank. Secondly, a pump pipe conveying and adding system is modified, the conveying capacity of the lime pump is properly increased, a circulating pipeline is installed, the front pressure and the rear pressure of the lime pipeline are close to each other, and the remaining small flow returns to a lime pump pool; and thirdly, installing a gate valve switch and a flowmeter at an operation point where lime milk is required to be added in lead-zinc flotation, and adjusting the lime milk consumption required by the lead-zinc flotation operation point.
The invention can greatly stabilize the lime consumption required by the lead-zinc flotation operation point, is easy to regulate and control, and simultaneously reduces the unnecessary lime milk loss. Because the pump pipe has a circulating return, the front pressure and the rear pressure of the lime milk are close in the conveying and adding process of the pump pipe, and the adjustment of each point is convenient.
In the embodiment of the invention, in the non-ferrous metal ore dressing, the pH value of ore pulp in the flotation operation is adjusted by self-preparing lime milk and adding the lime milk, and a technical method for regulating and controlling the pressure and the flow by conveying and adding the lime milk through a pump pipe is adopted. The following table shows the comparison of the main indexes before and after the implementation of the present invention according to modeling experiments. According to the results of index improvement, lime consumption reduction and the like, the newly increased economic benefit is estimated to be more than 600 ten thousand yuan per year.
TABLE 1 comparison of main indexes of lime milk preparation and addition system before and after implementation
Experiments prove that compared with the original lime milk preparation and pump pipe adding system, the lime milk preparation system has the advantages that the lime milk preparation system efficiency is improved, the quicklime digestion and emulsification effects are improved, the pressure-stabilizing and flow-stabilizing regulation and control capacity of lime milk conveyed and added by the pump pipe is greatly improved, the accuracy of lime milk adding quantity at a lead-zinc flotation operation point is improved, the phenomena of nonuniformity, blockage cleaning and waste of the lime milk adding system are greatly reduced, and the consumption of lime is greatly reduced.
Moreover, the invention has the advantages of small engineering investment, easy implementation, convenient field operation and regulation and control and obvious application effect, and is suitable for being widely used in similar mines.
The milk of lime preparation and pump line addition system and method according to the invention are described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the lime milk preparation and pump line addition system and method set forth above without departing from the scope of the invention. Therefore, the scope of the present invention should be determined by the contents of the appended claims.
Claims (10)
1. A lime milk preparation and pump line addition system is characterized by comprising:
the lime milk crude liquid preparation unit is used for crushing, grinding and stirring purchased quicklime to prepare lime milk crude liquid;
the lime milk storage pool is used for storing the lime milk crude liquid prepared by the lime milk crude liquid preparation unit so as to ensure that fine-particle quicklime in the lime milk crude liquid is fully hydrated and emulsified to form lime milk fine liquid;
the pump pipe adding unit is used for conveying the lime milk fine liquid in the lime milk storage pool to a lime milk adding operation point for lead-zinc flotation through a conveying pipeline by a slurry pump;
the pump pipe adding unit comprises a slurry pump arranged at the outlet end of the lime milk storage tank, a main pipeline led out from the slurry pump to the position near a lead-zinc flotation operation point, and a secondary pipeline led out from the main pipeline to the lead-zinc flotation operation point.
2. The lime milk preparation and pump line addition system of claim 1,
and the main pipeline extends to the back end of the lime milk storage pool after passing through the lead-zinc flotation operation point.
3. The lime milk preparation and pump line addition system of claim 2, wherein an outlet pressure gauge is provided in the main conduit near the outlet end, and an outlet gate valve is provided between the outlet pressure gauge and the outlet end.
4. The lime milk preparation and pump line addition system of claim 3, wherein a return pressure gauge is provided at a position of the main pipe near the return end, and a return gate valve is provided between the return pressure gauge and the return end.
5. The lime milk preparation and pump line addition system of claim 4, wherein a master flow meter is provided on the main conduit near the outlet pressure gauge.
6. Lime milk preparation and pump line addition system according to any of claims 1 to 5, wherein a small gate valve and a flow meter are provided on the slave pipeline.
7. The lime milk preparation and pump line addition system according to any one of claims 1 to 5, wherein the capacity of the lime milk storage tank is 300M 3 。
8. A lime milk preparation and pump line addition method for preparing lime milk and adding lime milk to a pump line by using the lime milk preparation and pump line addition system of any one of claims 1 to 7, the method comprising:
crushing, grinding and stirring purchased quicklime to prepare lime milk crude liquid;
storing the lime milk crude liquid in a lime milk storage pool so that fine-particle quicklime in the lime milk crude liquid is fully hydrated and emulsified in the lime milk storage pool to form lime milk fine liquid;
pumping the lime milk fine liquid in the lime milk storage pool from the outlet end of the lime milk storage pool through a slurry pump, and conveying the lime milk fine liquid to a lime milk adding operation point for lead-zinc flotation through a main pipeline and a pipeline.
9. The lime milk preparation and pump line addition method according to claim 8, further comprising, after being transported to the lime milk addition operation point for lead-zinc flotation through and from the main conduit: returning the lime milk which fails to flow into the lime milk adding operation point in the main pipeline to the lime milk storage tank through a return port end of the lime milk storage tank.
10. The lime milk preparation and pump line addition method of claim 9, after pumping out the lime milk fine liquid in the lime milk storage tank by a slurry pump, further comprising:
detecting outlet pressure and return pressure in the main pipeline through an outlet pressure gauge and a return pressure gauge which are arranged on the main pipeline; the outlet pressure gauge is arranged on the main pipeline and close to the outlet end, and the return pressure gauge is arranged on the main pipeline and close to the return end; and the number of the first and second electrodes,
and adjusting and maintaining the outlet pressure and the return pressure difference in the main pipeline within a preset range through a return gate valve which is arranged on the main pipeline and is close to the return end.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116174130A (en) * | 2023-04-24 | 2023-05-30 | 云南胜威化工有限公司 | Intelligent production ash melting system for feed-grade calcium hydrophosphate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116174130A (en) * | 2023-04-24 | 2023-05-30 | 云南胜威化工有限公司 | Intelligent production ash melting system for feed-grade calcium hydrophosphate |
| CN116174130B (en) * | 2023-04-24 | 2023-07-11 | 云南胜威化工有限公司 | Intelligent production ash melting system for feed-grade calcium hydrophosphate |
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