A laterite nickel ore acid high-pressure acid leaching test system

Abstract

This invention relates to a high-pressure acid leaching test system for lateritic nickel ore, comprising a reactor and a feeding assembly. The feeding assembly includes two feeding boxes, two door panels, and two unloading components. The two door panels are hinged to openings at the bottom of the two feeding boxes to open and close the openings. The two feeding boxes are fixedly connected and slidably and sealingly connected to a through-slot on the reactor. When one feeding box slides until its bottom door panel is inside the reactor, the other feeding box slides until its bottom door panel is outside the reactor. The two unloading components are respectively built into the two feeding boxes and can move vertically through the openings. The unloading components are used to carry lateritic nickel ore. During the movement of the feeding boxes, the reactor is kept under high pressure during material replacement without the need for depressurization, effectively shortening the test cycle. At the same time, the removal of the solid phase in the previous reaction and the feeding of lateritic nickel ore in the next reaction are carried out simultaneously, further shortening the test cycle.

Description

Technical Field

[0001] This invention relates to the field of hydrometallurgical technology, and in particular to a high-pressure acid leaching test system for laterite nickel ore. Background Technology

[0002] In order to improve the high-pressure acid leaching process of laterite nickel ore, researchers need to test the new process. If the test is conducted on the equipment in the factory, it will affect the normal production of the equipment. Therefore, a separate reaction vessel is usually set up to conduct high-pressure acid leaching tests of laterite nickel ore.

[0003] Following a new process (including adjustments to parameters such as pH, pressure, and temperature), lateritic nickel ore is placed in a reactor filled with strong acid. The reactor is pressurized and the temperature controlled. Finally, samples of the liquid phase are taken from the reactor to analyze its composition, thus completing the high-pressure acid leaching test of the lateritic nickel ore. After the reaction, to proceed with the next set of tests, the solid phase in the reactor needs to be removed. This solid phase (including unreacted lateritic nickel ore and the slag phase generated during the reaction) must be removed to avoid affecting the results of subsequent tests.

[0004] Since the solid phase is deposited at the bottom of the reactor, it is necessary to depressurize the reactor before the solid phase can be removed. However, the experiment includes a control group and multiple test groups, and the entire experiment requires frequent depressurization, resulting in a long experimental cycle. Summary of the Invention

[0005] In view of this, it is necessary to provide a high-pressure acid leaching test system for laterite nickel ore to solve the problem that the test process includes a control group and multiple test groups, and the entire test process requires frequent depressurization, resulting in a long test cycle.

[0006] This invention provides a high-pressure acid leaching test system for laterite nickel ore, comprising a reactor and a feeding assembly. The feeding assembly includes two feeding boxes, two door panels, and two unloading components. The two door panels are respectively hinged to openings at the bottom of the two feeding boxes to open and close the openings. The two feeding boxes are fixedly connected to each other and are slidably and sealingly connected to a through-slot on the reactor. When one feeding box slides to the point where its bottom door panel is inside the reactor, the other feeding box slides to the point where its bottom door panel is outside the reactor. The two unloading components are respectively built into the two feeding boxes and can move vertically through the openings. The unloading components are used to carry laterite nickel ore.

[0007] Furthermore, the reactor is equipped with pressure control and temperature control components to control the pressure and temperature inside the reactor.

[0008] Furthermore, the side of the door panel away from the other door panel is hinged to the feed box. The door panel can rotate to a first position and a second position. When the door panel rotates to the first position, the door panel is engaged in the opening. When the door panel rotates to the second position, the door panel is located below the feed box.

[0009] Furthermore, the two feed boxes can slide to a third position and a fourth position. When the two feed boxes slide to the third position, the bottom door plate of one feed box is located inside the reactor, and the bottom door plate of the other feed box is located outside the reactor. When the two feed boxes slide to the fourth position, the bottom door plates of the two feed boxes abut against the reactor.

[0010] Furthermore, the top of the door panel has a protrusion that matches the shape of the bottom opening of the feed box. A sealing ring is fitted on the outside of the protrusion. When the door panel is rotated to close the opening, the protrusion is engaged in the opening, and the sealing ring is located in the gap between the protrusion and the opening.

[0011] Furthermore, the feeding component includes a rotating rod, a rope, and a net. The rotating rod is arranged along the sliding direction of the feeding box and is rotatably and sealed to the feeding box. One end of the rope is fixedly connected to the rotating rod, and the other end of the rope is fixedly connected to the net. The top of the net is recessed downward to form a cavity for carrying laterite nickel ore.

[0012] Furthermore, both the rope and the net are made of stainless steel, and the top of the net is provided with a detachable cover plate. Both the net and the cover plate have through holes.

[0013] Furthermore, the unloading component also includes a motor, which is fixedly connected to the feed box, and the output end of the motor is connected to the rotating rod to drive the rotating rod to rotate.

[0014] Furthermore, it also includes two pressure regulating components, which are fixedly connected to opposite sides of the two feed boxes respectively. The output ends of the two pressure regulating components are respectively connected to the interior of the two feed boxes to adjust the pressure inside the feed boxes.

[0015] Furthermore, it also includes a driving component connected to the two feed boxes for driving the two feed boxes to slide.

[0016] Compared with existing technologies, this method involves adding reactive acid to the reactor and adjusting the pressure and temperature inside the reactor to meet the experimental process conditions. Since one feed hopper's bottom door is located inside the reactor, while the other feed hopper's bottom door is located outside, the bottom door of the feed hopper located outside the reactor is opened. Laterite nickel ore is placed into the corresponding discharge container, the door is closed, the feed hopper is slid to move the door into the reactor, and then the door is opened again. The discharge container moves downwards, allowing the laterite nickel ore inside to come into contact with the reactive acid. After the reaction is complete, the unloading part moves upward into the feed box, the door is closed, and it can be moved out of the reactor following the above steps. At the same time, another feed box can carry new laterite nickel ore into the reactor. During the movement of the feed box, since the feed box and the through groove opened on the reactor are slidably and sealed, the reactor can be kept under high pressure during material change without the need for pressure relief, which effectively shortens the test cycle. At the same time, the removal of the solid phase in the previous reaction and the feeding of laterite nickel ore in the next reaction are carried out simultaneously, further shortening the test cycle. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall external structure of the high-pressure acid leaching test system for laterite nickel ore provided in this embodiment of the invention;

[0018] Figure 2 This is a schematic diagram of the overall internal structure of the high-pressure acid leaching test system for laterite nickel ore provided in this embodiment of the invention;

[0019] Figure 3 This is a schematic diagram of the sliding structure of the feed box in the high-pressure acid leaching test system for laterite nickel ore provided in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the material discharge structure in the high-pressure acid leaching test system for laterite nickel ore provided in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the connection between the feed box and the door panel in the high-pressure acid leaching test system for laterite nickel ore provided in an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the connection between the rope and the net in the high-pressure acid leaching test system for laterite nickel ore provided in an embodiment of the present invention. Detailed Implementation

[0023] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0024] like Figure 1-2As shown, the present invention provides a high-pressure acid leaching test system for laterite nickel ore, including a reactor 100 and a feeding assembly 200. The feeding assembly 200 includes two feeding boxes 210, two door panels 220, and two unloading components 230. The two door panels 220 are respectively hinged to openings at the bottom of the two feeding boxes 210 to open and close the openings. The two feeding boxes 210 are fixedly connected to each other. The two feeding boxes 210 are slidably and sealed to a through groove on the reactor 100. When one feeding box 210 slides to the point where its bottom door panel 220 is inside the reactor 100, the other feeding box 210 slides to the point where its bottom door panel 220 is outside the reactor 100. The two unloading components 230 are respectively built into the two feeding boxes 210 and can move vertically through the openings. The unloading components 230 are used to carry laterite nickel ore.

[0025] During implementation, reaction acid is added to the reactor 100, and the pressure and temperature inside the reactor 100 are adjusted to meet the conditions of the experimental process. Since one feed box 210 slides to its bottom door plate 220 inside the reactor 100, and the other feed box 210 slides to its bottom door plate 220 outside the reactor 100, the door plate 220 at the bottom of the feed box 210 outside the reactor 100 is opened, and laterite nickel ore is placed into the corresponding discharge component 230. The door plate 220 is closed, and the feed box 210 is slid to move the door plate 220 into the reactor 100. The door plate 220 is then opened, and the discharge component 230 moves downwards, allowing the contents inside to be discharged. After the reaction of lateritic nickel ore and the reaction acid is completed, the unloading part 230 moves upward into the feed box 210, the door 220 is closed, and it can be moved out of the reactor 100 according to the above steps. At the same time, another feed box 210 can carry new lateritic nickel ore into the reactor 100. During the movement of the feed box 210, since the feed box 210 and the through groove opened on the reactor 100 slide and are sealed, the reactor 100 can be kept under high pressure during material change without the need for pressure relief, which effectively shortens the test cycle. At the same time, the removal of the solid phase in the previous reaction and the feeding of lateritic nickel ore in the next reaction are carried out simultaneously, further shortening the test cycle.

[0026] The reactor 100 in this embodiment is a vessel that those skilled in the art would conceive of for providing a high-pressure acid leaching reaction for laterite nickel ore.

[0027] In one embodiment, a pressure control component 110 and a temperature control component 120 are installed inside the reactor 100 to control the pressure and temperature inside the reactor 100. The pressure control component 110 may include a gas cylinder, a booster pump, a valve, and connecting pipes. The gas cylinder and booster pump are connected to the reactor 100 via the connecting pipes. The valve is installed on the connecting pipes to control the opening and closing of the connecting pipes, thereby controlling the pressure inside the reactor 100. The pressure control component 110 is a structure that those skilled in the art can conceive of, and will not be elaborated further here. Meanwhile, the temperature control component 120 may be an electric heating coil disposed in the jacket of the reactor 100, or it may be an electric heating rod built into the reactor 100, etc. This embodiment of the invention does not limit the specific type of heating component.

[0028] In one embodiment, two annular sealing gaskets are provided in the through grooves on both sides of the reactor 100, and the two feed boxes 210 slide and are sealed to the two annular sealing gaskets respectively.

[0029] In this embodiment, the feeding assembly 200 is a structure for conveying lateritic nickel ore into the reactor 100 and for removing the solid phase formed after the reaction of the lateritic nickel ore in the reactor 100. The feeding assembly 200 includes two feeding boxes 210, two door plates 220, and two unloading components 230. The two door plates 220 are respectively hinged to openings at the bottom of the two feeding boxes 210 to open and close the openings. The two feeding boxes 210 are fixedly connected to each other and are slidably and sealingly connected to through slots on the reactor 100. When one feeding box 210 slides to the point where its bottom door plate 220 is inside the reactor 100, the other feeding box 210 slides to the point where its bottom door plate 220 is outside the reactor 100. The two unloading components 230 are respectively built into the two feeding boxes 210 and can move vertically through the openings. The unloading components 230 are used to carry the lateritic nickel ore.

[0030] In one embodiment, the side of door panel 220 away from the other door panel 220 is hinged to the feed box 210. Door panel 220 can rotate to a first position and a second position. When door panel 220 rotates to the first position, it is engaged in the opening. When door panel 220 rotates to the second position, it is located below the feed box 210. The two feed boxes 210 can slide to a third position and a fourth position. When the two feed boxes 210 slide to the third position, the bottom door panel 220 of one feed box 210 is located inside the reactor 100, and the bottom door panel 220 of the other feed box 210 is located outside the reactor 100. When the two feed boxes 210 slide to the fourth position, the bottom door panels 220 of both feed boxes 210 abut against the reactor 100.

[0031] like Figure 2As shown, firstly, the laterite nickel ore to be reacted is loaded into the feeder 230. The feeder 230 is then moved upwards into the feed box 210. At this time, the door plate 220 is closed, and external force is applied to move the feed box 210 towards the reactor 100 until the feed box 210 moves to the fourth position, at which point the door plate 220 abuts against the bottom of the reactor 100. Figure 3 As shown, at this point, the external force applied to the door panel 220 can be released, and the door panel 220 continues to move until it enters the reactor 100, as... Figure 4 As shown, the door panel 220 rotates downwards under its own weight. At this time, the feeding component 230 can move the laterite nickel ore it carries down to the reaction acid in the reactor 100 for reaction.

[0032] After the reaction is completed, the feeder 230 is first moved upward into the feed box 210. The feed box 210 moves away from the reactor 100. During this process, the door plate 220 abuts against the reactor 100 until it is squeezed and seals the opening at the bottom of the feed box 210. When the feed box 210 moves out of the reactor 100, the solid phase in the feeder can be taken out.

[0033] like Figure 2 and Figure 6 As shown, in one embodiment, the unloading component 230 includes a rotating rod 231, a rope 232, and a net 233. The rotating rod 231 is arranged along the sliding direction of the feed box 210. The rotating rod 231 is rotatably and sealedly connected to the feed box 210. One end of the rope 232 is fixedly connected to the rotating rod 231, and the other end of the rope 232 is fixedly connected to the net 233. The top of the net 233 is recessed downward to form a cavity for carrying laterite nickel ore.

[0034] Both the rope 232 and the net 233 are made of stainless steel. The top of the net 233 has a detachable cover plate, and both the net 233 and the cover plate have through holes. It should be noted that the through holes in the net 233 and the cover plate can be formed using processes such as punching, and the size of the through holes must ensure that laterite nickel ore cannot pass through. Furthermore, the net 233 and the cover plate can be connected by a threaded connection, or alternatively by a plug-in connection; this embodiment of the invention does not limit the choice of connection method.

[0035] With the above settings, the rotation of the lever 231 can realize the process of releasing the rope 232. For example, rotating the lever 231 in the forward direction can cause the rope 232 to continuously wrap around the lever 231, so as to realize the function of raising the net bag 233; rotating the lever 231 in the reverse direction can continuously lower the rope 232, so as to realize the function of lowering the net bag 233.

[0036] To facilitate the rotation of the rotating rod 231, in one embodiment, the unloading component 230 further includes a motor 234, which is fixedly connected to the feed box 210. The output end of the motor 234 is connected to the rotating rod 231 to drive the rotating rod 231 to rotate.

[0037] It should be noted that the sealed rotational connection between the rotating rod 231 and the feed box 210 can adopt the existing stirring structure of the reaction vessel, and the structure can be conceived by those skilled in the art through mechanical seals, packing seals and oil seals.

[0038] When the feed box 210 slides to the position where its bottom door plate 220 is about to be moved out of the reactor 100, in order to prevent the high-pressure gas inside the feed box 210 from leaking, such as Figure 5 As shown, in one embodiment, the top of the door panel 220 has a protrusion that matches the shape of the bottom opening of the feed box 210. A sealing ring 221 is fitted on the outside of the protrusion. When the door panel 220 is rotated to close the opening, the protrusion is engaged in the opening, and the sealing ring 221 is located in the gap between the protrusion and the opening.

[0039] Meanwhile, to facilitate the ejection of high-pressure acidic gas from the feed box 210 when the door panel 220 is opened, this embodiment also includes two pressure regulating components 240. The two pressure regulating components 240 are fixedly connected to opposite sides of the two feed boxes 210, and their output ends are connected to the interior of the two feed boxes 210 to regulate the pressure inside the feed box 210. By drawing the high-pressure acidic gas from the feed box 210 through the pressure regulating components 240 before opening the door panel 220, safety accidents can be avoided. The pressure regulating components 240 can be implemented using, for example, the structure of the pressure control component 110 described above.

[0040] With the above settings, when the feed box 210 moves to the bottom door plate 220 inside the reactor 100, the door plate 220 cannot be opened automatically because the reactor 100 is under high pressure. At this time, the pressure regulating component 240 can be used to pressurize the feed box 210 to open the door plate 220.

[0041] In one embodiment, a drive unit 250 is further included, which is connected to the two feed boxes 210 to drive the two feed boxes 210 to slide. The drive unit 250 can be implemented by two cylinders arranged opposite to each other, the two cylinders being connected and their output ends being connected to the two feed boxes 210 respectively, for driving the two feed boxes 210 to slide stably.

[0042] Compared with existing technologies, adding reaction acid to the reactor 100 and adjusting the pressure and temperature inside the reactor 100 to meet the experimental process conditions involves one feed box 210 sliding to its bottom door plate 220 inside the reactor 100, and the other feed box 210 sliding to its bottom door plate 220 outside the reactor 100. At this time, opening the bottom door plate 220 of the feed box 210 outside the reactor 100 allows laterite nickel ore to be placed into the corresponding discharge component 230. Closing the door plate 220, sliding the feed box 210 moves the door plate 220 into the reactor 100, opening the door plate 220, and allowing the discharge component 230 to move downwards, filling the container with... The lateritic nickel ore is brought into contact with the reaction acid. After the reaction is completed, the unloading part 230 moves upward into the feed box 210, the door 220 is closed, and it can be moved out of the reactor 100 according to the above steps. At the same time, another feed box 210 can carry new lateritic nickel ore into the reactor 100. During the movement of the feed box 210, since the feed box 210 and the through groove opened on the reactor 100 slide and are sealed, the reactor 100 can be kept under high pressure during material change without the need for pressure relief, which effectively shortens the test cycle. At the same time, the removal of the solid phase in the previous reaction and the feeding of the lateritic nickel ore in the next reaction are carried out simultaneously, further shortening the test cycle.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A laterite nickel ore acid high pressure acid leaching test system, characterized in that, Including the reactor and feed assembly; The feeding assembly includes two feeding boxes, two door panels, and two unloading components. The two door panels are respectively hinged to openings at the bottom of the two feeding boxes to open and close the openings. The two feeding boxes are fixedly connected to each other. The two feeding boxes are slidably and sealingly connected to a through groove on the reactor. When one feeding box slides to the point where its bottom door panel is inside the reactor, the other feeding box slides to the point where its bottom door panel is outside the reactor. The two unloading components are respectively built into the two feeding boxes and can move vertically through the openings. The unloading components are used to carry laterite nickel ore.

2. The laterite nickel ore acid high-pressure acid leaching test system according to claim 1, characterized in that, The reactor is equipped with pressure and temperature control components to control the pressure and temperature inside the reactor.

3. The acid high-pressure acid leaching test system for laterite nickel ore according to claim 1, characterized in that, The door panel is hinged to the feed box on the side away from the other door panel. The door panel can be rotated to a first position and a second position. When the door panel is rotated to the first position, the door panel is engaged in the opening. When the door panel is rotated to the second position, the door panel is located below the feed box.

4. The acid high-pressure acid leaching test system for laterite nickel ore according to claim 3, characterized in that, The two feed boxes can slide to a third position and a fourth position. When the two feed boxes slide to the third position, the bottom door of one feed box is located inside the reactor, and the bottom door of the other feed box is located outside the reactor. When the two feed boxes slide to the fourth position, the bottom door of the two feed boxes abuts against the reactor.

5. The acid high-pressure acid leaching test system for laterite nickel ore according to claim 1, characterized in that, The top of the door panel has a protrusion that matches the shape of the bottom opening of the feed box. A sealing ring is fitted on the outside of the protrusion. When the door panel is rotated to close the opening, the protrusion is engaged in the opening, and the sealing ring is located in the gap between the protrusion and the opening.

6. The acid high-pressure acid leaching test system for laterite nickel ore according to claim 1, characterized in that, The feeding component includes a rotating rod, a rope, and a net. The rotating rod is arranged along the sliding direction of the feeding box and is rotatably and sealed to the feeding box. One end of the rope is fixedly connected to the rotating rod, and the other end of the rope is fixedly connected to the net. The top of the net is recessed downward to form a cavity for carrying laterite nickel ore.

7. The high-pressure acid leaching test system for laterite nickel ore according to claim 6, characterized in that, Both the rope and the net are made of stainless steel. The top of the net is provided with a detachable cover plate, and both the net and the cover plate have through holes.

8. The acid high-pressure acid leaching test system for laterite nickel ore according to claim 6, characterized in that, The feeding component also includes a motor, which is fixedly connected to the feeding box. The output end of the motor is connected to the rotating rod to drive the rotating rod to rotate.

9. The acid high-pressure acid leaching test system for laterite nickel ore according to claim 1, characterized in that, It also includes two pressure regulating components, which are fixedly connected to the opposite sides of the two feed boxes respectively. The output ends of the two pressure regulating components are respectively connected to the inside of the two feed boxes to adjust the pressure inside the feed boxes.

10. The acid high-pressure acid leaching test system for laterite nickel ore according to claim 1, characterized in that, It also includes a drive unit connected to the two feed boxes for driving the two feed boxes to slide.

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