Ore dissolving device for leaching calcium element and use method

Abstract

The invention provides an ore dissolving device for leaching calcium element and a using method, the device comprises an ore dissolving reactor, an ammonium salt storage tank and a slurry liquid filtering device, the ore dissolving reactor comprises an upper chamber, and a stirring assembly and a temperature control assembly which are arranged in the upper chamber; the slurry liquid filtering device comprises a lower cavity communicated with the upper cavity and a scraper type filtering device, and the scraper type filtering device is used for separating inflowing slurry liquid into leaching liquid and a solid slag phase; the ammonium salt storage tank device is used for collecting ammonia gas generated in the ore dissolving reaction and a subsequent solution obtained after calcium extraction of the leaching solution, and then an ammonium salt solution with the preset pH value is generated. According to the embodiment, the stirring assembly and the temperature control assembly can improve the ore dissolving reaction rate; the scraper type filtering device can separate the slurry into a leaching solution and a solid slag phase, so that the leaching solution and the solid slag phase can be conveniently separated and collected; and the ammonium salt storage tank device can ensure the recovery and cyclic utilization of ammonia gas and a leaching solution through a subsequent solution for calcium extraction, so that the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial solid waste utilization, and in particular to an ore dissolving device for leaching calcium elements and a use method thereof. Background Art

[0002] Steel slag is a byproduct of the steelmaking process. Its main components are oxides of calcium, silicon, magnesium, iron, aluminum, etc. Calcium mainly exists in the form of dicalcium silicate and tricalcium silicate. At present, the resource utilization rate of steel slag is very low. Improper storage will cause the heavy metals in it to seep into the soil, resulting in a decline in soil quality.

[0003] Calcium carbide slag is a solid product produced after the hydrolysis of calcium carbide. Its main component is calcium hydroxide. Due to its high alkali content, it is a difficult-to-treat industrial waste slag. The treatment method for calcium carbide slag at home and abroad is usually to pile it up and landfill it, which not only occupies a large amount of land resources, but also pollutes nearby soil and water sources.

[0004] Since both steel slag and carbide slag have high calcium content, how to extract calcium resources is the key point to be considered at present. Summary of the invention

[0005] The content of the present invention is used to introduce the concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of the present disclosure is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0006] Some embodiments of the present invention provide a ore dissolving device and a method for using the ore dissolving device for leaching calcium elements to solve the technical problems mentioned in the above background technology section.

[0007] In a first aspect, some embodiments of the present invention provide a ore dissolving device for leaching calcium elements, the device comprising an ore dissolving reactor, and an ammonium salt storage tank and a slurry liquid filtering device respectively connected to the upper and lower ends of the ore dissolving reactor, wherein:

[0008] The ore dissolution reactor comprises an upper chamber and a stirring assembly and a temperature control assembly arranged in the upper chamber. The upper chamber is used for the ammonium salt solution to react with the solid material to dissolve the ore; the temperature control assembly is used to control the temperature of the reaction environment; the stirring assembly is used to make the ammonium salt solution and the solid material fully react to form a slurry liquid;

[0009] The slurry liquid filtering device comprises a lower chamber connected to the upper chamber and a scraper-type filtering device arranged in the lower chamber, wherein the scraper-type filtering device is used to separate the inflowing slurry liquid into a leachate and a solid slag phase;

[0010] The ammonium salt storage tank device is used to collect ammonia generated by the ore dissolution reaction and the subsequent solution of the leaching liquid after calcium extraction, so as to generate an ammonium salt solution with a preset pH value.

[0011] In a second aspect, some embodiments of the present invention provide a method for using the ore dissolving device for leaching calcium element described in any embodiment of the first aspect, the method comprising:

[0012] Adding solid material and ammonium salt solution to the ore dissolution reactor and adding subsequent solution of calcium extraction from the leaching solution to the ammonium salt storage tank, and sealing the ore dissolution reactor and the ammonium salt storage tank;

[0013] The stirring component mixes and stirs the ammonium salt solution and the solid material to form a slurry liquid after the ore dissolution reaction; the temperature control component controls the ambient temperature in the upper chamber to reach a preset temperature; the leaching liquid reacts with the ammonia gas produced by the ore dissolution reaction through the subsequent solution of calcium extraction until an ammonium salt solution with a target pH value is generated;

[0014] After the ore dissolution reaction is completed, the stirring assembly is turned off, and the slurry liquid enters the lower chamber, and the slurry liquid is separated into leaching liquid and solid slag phase by a scraper filter device, and the ammonium salt solution in the ammonium salt storage tank is collected.

[0015] The above embodiments of the present invention have the following beneficial effects:

[0016] Stirring by the stirring assembly can make the ammonium salt solution and the solid material fully react, thereby improving the leaching rate of the calcium element.

[0017] By controlling the ambient temperature of the ore dissolution reaction through a temperature control component, the reaction rate can be increased and the reaction can be made more complete.

[0018] The scraper filter device can separate the slurry liquid into the leachate and the solid slag phase, making it easier to collect them separately.

[0019] Finally, the ammonium salt storage tank device can ensure the recycling of ammonia gas and subsequent solution of the leaching solution after calcium extraction, reducing costs. Ammonia gas can be combined with the subsequent solution of the leaching solution after calcium extraction, and can also adjust the pressure balance in the ore dissolving reactor and the ammonium salt storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1It is a structural schematic diagram of an embodiment of a ore dissolving device for leaching calcium element of the present invention;

[0022] Figure 2 It is a schematic structural diagram of an embodiment of a ore dissolution reactor of the present invention;

[0023] Figure 3 It is a structural schematic diagram of an embodiment of the slurry liquid filtering device of the present invention;

[0024] Figure 4 The present invention is a schematic flow chart of an embodiment of a method for using a ore dissolving device for leaching calcium elements according to the present invention.

[0025] Description of reference numerals:

[0026] 1. ore dissolution reactor; 11. temperature probe; 12. feed port; 13. first heater; 14. second heater; 15. first stirring rod; 16. first flange ring; 161. first flange ring interface; 162. first screw hole; 17. second flange ring; 171. second flange ring interface; 172. second screw hole; 18. stirring blade; 19. first stirring motor; 110. slurry liquid outlet;

[0027] 2. Slurry liquid filtering device; 21. Third flange ring; 22. Fourth flange ring; 23. Scraper-type filtering device; 231. Second stirring motor; 232. Scraper; 233. Second stirring rod; 234. Leaching slag phase discharge port; 235. Filter screen; 24. Leaching liquid outlet;

[0028] 3. Ammonium salt storage tank; 31. Ammonia pipeline; 32. PH probe; 33. Ammonium salt liquid intake port. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than 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.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0033] First see Figure 1 , Figure 1 FIG. 1 is a schematic diagram of the structure of an embodiment of a ore dissolving device for leaching calcium element of the present invention. Figure 1 As shown, the ore dissolving device for leaching calcium element comprises an ore dissolving reactor 1, a slurry liquid filtering device 2 and an ammonium salt storage tank 3. The above-mentioned ore dissolving reactor 1 is used to fully mix the ammonium salt solution and solid materials such as steel slag and carbide slag to carry out ore dissolving reaction to form a slurry liquid. The lower end of the above-mentioned ore dissolving reactor 1 can be connected to the slurry liquid filtering device 2, and the slurry liquid filtering device 2 is used to separate the slurry liquid into solid and liquid. The above-mentioned ammonium salt storage tank 3 is connected to the upper end of the ore dissolving reactor 1, and is used to collect ammonia generated during the ore melting reaction.

[0034] It should be noted that the above-mentioned ammonium salt solution can be one or more of ammonium chloride, ammonium nitrate, ammonium sulfate, ammonium bisulfate, and ammonium bicarbonate, and those skilled in the art can determine it according to actual conditions.

[0035] See next Figure 2 And continue to read Figure 1 , Figure 2 FIG. 1 is a schematic diagram of the structure of an embodiment of a ore dissolution reactor of the present invention. Figure 1 and Figure 2As shown, the above-mentioned ore dissolution reactor 1 can be configured as a cylindrical shell with an upper chamber. The upper chamber is used for performing ore dissolution reaction to form a slurry liquid including calcium element. The shell of the ore dissolution reactor 1 is spliced ​​by a first shell section and a second shell section. Specifically, a first flange ring 16 is welded at the first flange ring interface 161 at the lower end of the first shell section. A second flange ring 17 is welded at the second flange ring interface 171 at the upper end of the second shell section. The multiple first screw holes 162 of the first flange ring 16 and the second screw holes 172 of the second flange ring 17 can be detachably connected by bolts. In order to enhance the sealing performance, a sealing gasket can also be arranged between the first flange ring 16 and the second flange ring 17. In this way, the shell of the ore dissolution reactor 1 can be disassembled, which can facilitate the cleaning of the upper chamber.

[0036] A feed port 12 communicating with the upper chamber is provided at the upper end of the ore dissolution reactor 1 for placing the ammonium salt solution and the solid material.

[0037] In order to make the ammonium salt solution and the solid material fully react, the ore dissolution reactor 1 also includes a stirring component, which can include a stirring component from top to bottom ( Figure 1 The first stirring motor 19, the first stirring rod 15 and the stirring blade 18 are connected in sequence (in the direction of the figure). The first stirring motor 19 can be fixed to the upper part of the ore dissolution reactor 1 through a bracket and other components, the upper end of the first stirring rod 15 is connected to the transmission shaft of the first stirring motor 19, the lower end of the first stirring rod 15 extends into the bottom of the upper chamber, and the lower end of the first stirring rod 15 is fixed with a plurality of stirring blades 18 in a circular array.

[0038] In the working state, after the ammonium salt solution and the solid material are put into the upper chamber, the feed port 12 can be closed by an electric valve or manually, and then the first stirring motor 19 drives the stirring blade 18 to rotate through the first stirring rod 15, so that the ammonium salt solution and the solid material can react fully.

[0039] A temperature control component is also provided at the upper part of the upper chamber, and the temperature control component includes a first heater 13, a second heater 14 and a temperature probe 11. During the process of the ore dissolution reaction, the difference in ambient temperature will affect the rate and degree of ore dissolution reaction. Those skilled in the art can determine the optimal ambient temperature of the ore dissolution reaction as the preset temperature based on the existing technology or repeated experiments. When the temperature probe 11 detects that the ambient temperature in the upper chamber is lower than the preset temperature, the first heater 13 and the second heater 14 are started so that the ambient temperature reaches the preset temperature, and then the first heater 13 and the second heater 14 are turned off. In this way, the ore dissolution reaction can be fully carried out, and the calcium element in the solid material is completely converted into soluble calcium chloride, thereby improving the leaching rate of the calcium element. Although the above is shown as an example of two heaters, those skilled in the art can adjust the number of the above heaters according to actual conditions.

[0040] A slurry liquid outlet 110 may be provided in the middle of the bottom of the above-mentioned ore dissolution reactor 1, for allowing the slurry liquid to flow into the slurry liquid filtering device 2. The bottom of the above-mentioned ore dissolution reactor 1 may be provided in an arc shape, that is, the middle part is lower than the surrounding parts, so that the slurry liquid can completely enter the slurry liquid filtering device 2 through the slurry liquid outlet 110 to avoid residue.

[0041] The slurry liquid filtering device 2 can be configured as a cylindrical shell corresponding to the ore dissolution reactor 1. In the assembled state, the upper end of the shell of the slurry liquid filtering device 2 is welded to the lower end of the shell of the ore dissolution reactor 1 to form a lower chamber, which is used for solid-liquid separation of the slurry liquid.

[0042] The shell of the slurry liquid filtering device 2 is formed by splicing a third shell segment and a fourth shell segment. Specifically, a third flange ring 21 is welded at the lower end of the third shell segment. A fourth flange ring 22 is welded at the upper end of the fourth shell segment. The third flange ring 21 and the fourth flange ring 22 are detachably connected by bolts. In order to enhance the sealing performance, a sealing gasket can also be provided between the third flange ring 21 and the fourth flange ring 22. In this way, the shell of the slurry liquid filtering device 2 can be disassembled, which can facilitate the cleaning of the lower chamber.

[0043] The slurry filtering device also includes a scraper-type filtering device 23 arranged in the lower chamber, specifically including a second stirring motor 231, a second stirring rod 233, a scraper 232, a filter screen 235 and a leached slag phase discharge port 234. The second stirring motor 231 can be arranged on the outside of the slurry liquid filtering device 2 by means of a bracket or the like, and the transmission shaft of the second stirring motor 231 is fixedly connected to one end of the second stirring rod 233, and the other end of the second stirring rod 233 extends into the lower chamber in a horizontal direction. A plurality of scrapers 232 are fixedly provided along the axial direction of the second stirring rod 233. The filter screen 235 is sleeved on the scraper 232, and the filter screen 235 can be connected to the inner wall of the lower chamber through a plurality of support columns, so that the filter screen 235 is suspended in the lower chamber. An opening can be provided at the upper end of the filter screen 235 to allow the slurry liquid to enter. As Figure 1 As shown, the right end of the filter screen 235 is connected to a leached slag phase discharge port 234 extending out of the slurry liquid filtering device 2 .

[0044] In the working state, as the slurry enters the lower chamber from the slurry outlet 110, the second stirring motor 231 drives the plurality of scrapers 232 to rotate in the filter screen 235 through the second stirring rod 233, thereby guiding the solid slag phase in the slurry to move toward the leaching slag phase outlet 234, which can be collected by a related container. The leaching liquid in the slurry passes through the filter screen 235 and flows to the bottom of the lower chamber, thereby achieving solid-liquid separation. Since the filter screen 235 is in a suspended state, the filtered leaching liquid has a better flow space.

[0045] An leaching liquid outlet 24 is provided at the bottom of the shell of the slurry liquid filtering device 2. The leaching liquid flows out from the leaching liquid outlet 24 and can be stored in a related container.

[0046] The above-mentioned ammonium salt storage tank 3 is communicated with the upper end of the upper chamber through an ammonia pipeline 31, so that the ammonia generated by the ore dissolving reaction enters the ammonium salt storage tank 3. The upper end of the ammonium salt storage tank 3 is provided with a liquid inlet, which is used to add the subsequent solution of the leaching solution after calcium extraction into the ammonium salt storage tank 3. Since the ammonia in the subsequent solution is evaporated during the ore dissolving reaction, its chloride ions remain more and can be combined with the ammonia entering from the upper chamber, thereby achieving a higher concentration of ammonium salt solution. Thereby, the recycling and utilization of ammonia and the subsequent solution of the leaching solution after calcium extraction is realized, and the cost is reduced.

[0047] In order to improve the reliability of the ammonium salt solution in the ammonium salt storage tank 3, a pH probe 32 can also be set at the upper end of the ammonium salt storage tank 3 to detect the acidity and alkalinity of the ammonium salt solution. An ammonium salt liquid taking port 33 is also provided at the bottom of the above-mentioned ammonium salt storage tank 3. When the above-mentioned pH probe 32 detects that the pH value of the ammonium salt solution exceeds the preset threshold value, it indicates that the acidity and alkalinity of the ammonium salt solution are qualified, and the ammonium salt solution can be taken out through the above-mentioned ammonium salt liquid taking port 33 and used for the subsequent ore dissolution reaction.

[0048] The upper end of the ammonium salt storage tank 3 may also be provided with an air outlet. When the pressure in the ammonium salt storage tank 3 is too high, indicating that too much ammonia is produced, the air outlet may be opened to discharge the ammonia. A safety valve may be provided on the air outlet. When the pressure exceeds a set value, the safety valve automatically opens to ensure pressure balance in the ore dissolving reactor 1 and the ammonium salt storage tank 3.

[0049] In order to prevent ammonia from causing danger to the human body or the environment, the gas outlet can be connected to an ammonia treatment device. The ammonia treatment device can be a device that treats ammonia by absorption, adsorption, separation, etc., and those skilled in the art can choose according to actual conditions, which is not limited here.

[0050] The presence of the ammonium salt storage tank 3 can ensure the recycling of ammonia and the subsequent solution of the leaching solution after calcium extraction, thereby reducing costs. The ammonia gas can be combined with the subsequent solution of the leaching solution after calcium extraction, thereby adjusting the pressure balance in the ore dissolving reactor 1 and the ammonium salt storage tank 3.

[0051] The present invention also provides a method for using a ore dissolving device for leaching calcium elements, which can be used for the ore dissolving device for leaching calcium elements in the above-mentioned embodiments. Figure 4 As shown, it shows a flow chart 400 of an embodiment of a method for using a ore dissolving device for leaching calcium provided by the present invention. The method comprises the following steps:

[0052] Step 401, adding solid material and ammonium salt solution to the ore dissolution reactor and adding subsequent solution of leaching solution after calcium extraction to the ammonium salt storage tank, and closing the ore dissolution reactor and the ammonium salt storage tank.

[0053] In some embodiments, the ammonium salt solution and the solid material are placed into the upper chamber of the ore dissolution reactor 1 through the feed port 12, and the subsequent solution of the leaching solution after calcium extraction is added to the ammonium salt storage tank 3 through the liquid inlet. Subsequently, the feed port 12 of the ore dissolution reactor 1, the slurry liquid outlet 110, and the gas outlet, liquid inlet, and ammonium salt liquid intake port 33 of the ammonium salt storage tank 3 can be closed by electric valves or manual valves. In addition to the electric valves or manual valves, the above-mentioned gas outlets can also be provided with safety valves.

[0054] Step 402, the stirring component mixes and stirs the ammonium salt solution and the solid material to form a slurry liquid after the ore dissolution reaction; the temperature control component controls the ambient temperature in the upper chamber to reach a preset temperature; the leaching liquid reacts with the ammonia gas produced by the ore dissolution reaction through the subsequent solution of calcium extraction until an ammonium salt solution with a target pH value is generated.

[0055] In some embodiments, the first stirring motor 19 drives the stirring blade 18 to rotate through the first stirring rod 15, so that the ammonium salt solution and the solid material react fully.

[0056] When the temperature probe 11 of the temperature control assembly detects that the ambient temperature in the upper chamber is lower than the preset temperature, the first heater 13 and the second heater 14 are started to make the ambient temperature reach the preset temperature, and then the first heater 13 and the second heater 14 are turned off. In this way, an appropriate ambient temperature is provided for the ore dissolution reaction, thereby improving the ore dissolution reaction rate and the leaching rate of calcium element.

[0057] During the ore dissolution reaction, the generated ammonia enters the ammonium salt storage tank 3 through the ammonia pipeline 31, and combines with the subsequent solution of the leaching solution after calcium extraction, thereby achieving a higher concentration of ammonium salt solution. Further, when the pH probe 32 detects that the pH value of the ammonium salt solution exceeds the preset threshold, it indicates that the pH value of the ammonium salt solution is qualified, and it can be taken out through the above-mentioned ammonium salt liquid intake port 33 and used for the subsequent ore dissolution reaction.

[0058] When the pressure in the ammonium salt storage tank 3 is too high, indicating that too much ammonia is produced, the gas outlet can be opened to discharge the ammonia. A safety valve can be provided on the gas outlet, and when the pressure exceeds the set value, the safety valve automatically opens to ensure the pressure balance in the ore dissolution reactor 1 and the ammonium salt storage tank 3. In order to prevent ammonia from causing danger to the human body or the environment, the gas outlet can be connected to an ammonia treatment device.

[0059] Step 403, after the ore dissolution reaction is completed, the stirring assembly is turned off, and the slurry liquid is allowed to enter the lower chamber, and the slurry liquid is separated into the leaching liquid and the solid slag phase by the scraper filter device, and the ammonium salt solution in the ammonium salt storage tank is collected.

[0060] In some embodiments, those skilled in the art can repeatedly test and set the duration of the ore dissolution reaction. When the above duration is reached, the stirring component and the temperature control component can be turned off, and the slurry liquid outlet 110 can be opened to allow the slurry liquid to enter the filter screen 235 of the lower chamber.

[0061] The second stirring motor 231 drives the plurality of scrapers 232 to rotate in the filter screen 235 through the second stirring rod 233, thereby guiding the solid slag phase in the slurry liquid to move toward the leaching slag phase discharge port 234. The leaching liquid in the slurry liquid passes through the filter screen 235 and flows to the bottom of the lower chamber, thereby achieving solid-liquid separation. The leaching liquid flows out from the leaching liquid outlet 24, and the solid slag phase is discharged from the leaching slag phase discharge port 234, and can be collected separately.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ore dissolving device for leaching calcium element, characterized in that: It includes a ore dissolution reactor, an ammonium salt storage tank and a slurry liquid filtering device respectively connected to the upper and lower ends of the ore dissolution reactor, wherein: The ore dissolution reactor comprises an upper chamber and a stirring assembly and a temperature control assembly arranged in the upper chamber. The upper chamber is used for the ammonium salt solution to react with the solid material to dissolve the ore; the temperature control assembly is used to control the temperature of the reaction environment; the stirring assembly is used to make the ammonium salt solution and the solid material fully react to form a slurry liquid; The slurry liquid filtering device comprises a lower chamber connected to the upper chamber and a scraper-type filtering device arranged in the lower chamber, wherein the scraper-type filtering device is used to separate the inflowing slurry liquid into a leachate and a solid slag phase; The slurry liquid filtering device is used to collect ammonia generated by the ore dissolution reaction and the subsequent solution of the leaching liquid after calcium extraction, and then generate an ammonium salt solution with a preset pH value.

2. The ore dissolving device for leaching calcium element according to claim 1, characterized in that: The shell of the ore dissolution reactor includes a first shell section connected to a first flange ring and a second shell section connected to a second flange ring, and the first flange ring and the second flange ring are detachably connected; a feed port is provided at the upper end of the ore dissolution reactor, and a slurry liquid outlet connected to the lower chamber is provided at the bottom.

3. The ore dissolving device for leaching calcium element according to claim 1, characterized in that: The stirring assembly includes a first stirring motor, a stirring rod and stirring blades connected in sequence, one end of the first stirring rod is connected to the transmission shaft of the first stirring motor, the other end of the first stirring rod extends into the bottom of the upper chamber, and a plurality of stirring blades are fixed in a circular array at the lower end of the first stirring rod.

4. The ore dissolving device for leaching calcium element according to claim 1, characterized in that: The temperature control assembly includes one or more heaters and a temperature probe disposed in the upper chamber.

5. The ore dissolving device for leaching calcium element according to claim 1, characterized in that: The scraper-type filtering device includes a second stirring motor, a second stirring rod, a scraper, a filter screen and a leaching residue phase discharge port. The transmission shaft of the second stirring motor is fixedly connected to one end of the second stirring rod, and the other end of the second stirring rod extends into the lower chamber in a horizontal direction. A plurality of scrapers are fixedly provided along the axial direction of the second stirring rod. The filter screen is sleeved on the scraper and suspended in the lower chamber. The leaching residue phase discharge port is connected to one side of the filter screen.

6. The ore dissolving device for leaching calcium element according to claim 5, characterized in that: The bottom of the shell of the slurry filtering device is provided with an extraction liquid outlet.

7. The ore dissolving device for leaching calcium element according to claim 1, characterized in that: The ammonium salt storage tank is connected to the ore dissolution reactor through an ammonia pipeline.

8. The ore dissolving device for leaching calcium element according to claim 7, characterized in that: The upper end of the ammonium salt storage tank is provided with an air outlet, a liquid inlet and a pH probe; the lower end of the ammonium salt storage tank is provided with an ammonium salt liquid inlet.

9. A method for using the ore dissolving device for leaching calcium as claimed in any one of claims 1 to 8, the method comprising: Adding solid material and ammonium salt solution to the ore dissolution reactor and adding subsequent solution of calcium extraction from the leaching solution to the ammonium salt storage tank, and sealing the ore dissolution reactor and the ammonium salt storage tank; The stirring component mixes and stirs the ammonium salt solution and the solid material to form a slurry liquid after the ore dissolution reaction; the temperature control component controls the ambient temperature in the upper chamber to reach a preset temperature; the leaching liquid reacts with the ammonia gas produced by the ore dissolution reaction through the subsequent solution of calcium extraction until an ammonium salt solution with a target pH value is generated; After the ore dissolution reaction is completed, the stirring assembly is turned off, and the slurry liquid enters the lower chamber, and the slurry liquid is separated into leaching liquid and solid slag phase by a scraper filter device, and the ammonium salt solution in the ammonium salt storage tank is collected.

10. The method for using the ore dissolving device for leaching calcium element according to claim 9, wherein the ammonium salt solution comprises at least one of the following: ammonium chloride, ammonium nitrate, ammonium sulfate, ammonium bisulfate, and ammonium bicarbonate.

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