High-pressure acid leaching test system for laterite nickel ore acid

Abstract

A high-pressure acid leaching test system for a laterite nickel ore acid, comprising a reaction kettle (100) and a feeding assembly (200). The feeding assembly (200) comprises two feeding boxes (210), two door plates (220), and two discharging members (230); the two door plates (220) are hingedly connected to openings formed in the bottoms of the two feeding boxes (210), respectively, and are used for opening and closing the openings; the two feeding boxes (210) are fixedly connected; the two feeding boxes (210) are slidably and sealedly connected to through grooves formed in the reaction kettle (100); when one of the feeding boxes (210) slides till the door plate (220) at the bottom of the feeding box (210) is located in the reaction kettle (100), the other feeding box (210) slides till the door plate (220) at the bottom of the feeding box (210) is located outside the reaction kettle (100); the two discharging members (230) are respectively arranged in the two feeding boxes (210) and can move through the openings in the vertical direction; and the discharging members (230) are used for carrying laterite nickel ores. In the moving process of the feeding boxes (210), it can be guaranteed that the reaction kettle (100) is always in a high pressure state during material changing, and pressure relief is not needed, so that the test cycle is effectively shortened; moreover, the removal of a solid phase in the previous reaction and the feeding step of the laterite nickel ores in the next reaction are synchronously carried out, so that the test cycle is further shortened.

Description

A laterite nickel ore high pressure acid leaching test system Technical Field

[0001] The invention relates to the technical field of hydrometallurgy, in particular to a laterite nickel ore high-pressure acid leaching test system. Background Art

[0002] In order to improve the high-pressure acid leaching process of laterite nickel ore acid, R&D personnel need to test the new process. If the test is carried out on the equipment in the factory, it will affect the normal production of the equipment. Therefore, a separate reactor is usually set up to carry out the high-pressure acid leaching test of laterite nickel ore acid.

[0003] According to the new process (including adjustments to acid pH, pressure, temperature and other parameters), the laterite nickel ore is thrown into a reactor filled with strong acid. By pressurizing and controlling the temperature of the reactor, the liquid phase in the reactor is finally sampled and the liquid phase components are detected, thus completing the high-pressure acid leaching test of the laterite nickel ore. After the reaction, the solid phase in the reactor needs to be drained out to proceed to the next set of test reactions. At this time, the solid phase (including unreacted laterite nickel ore and the slag phase generated by the reaction) needs to be drained out to avoid affecting the results of subsequent tests.

[0004] Since the solid phase is deposited at the bottom of the reactor, the reactor needs to be depressurized before the solid phase can be removed. However, 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.

[0005] Summary of the Invention

[0006] In view of this, it is necessary to provide a laterite nickel ore high pressure acid leaching test system to solve the problem that the test process includes a control group and multiple test groups, and the entire test process requires frequent pressure relief, resulting in a long test cycle.

[0007] The present invention provides a laterite nickel ore acid high-pressure acid leaching test system, comprising a reactor and a feeding assembly; the feeding assembly comprises two feed boxes, two door panels and two blanking pieces, the two door panels are respectively hinged to openings opened at the bottoms of the two feed boxes for opening and closing the openings, the two feed boxes are fixedly connected, the two feed boxes are slidably and sealedly connected to the through grooves opened on the reactor, when one of the feed boxes slides to the door panel at its bottom and is located inside the reactor, the other feed box slides to the door panel at its bottom and is located outside the reactor, the two blanking pieces are respectively built into the two feed boxes and can move vertically through the openings, and the blanking pieces are used to carry laterite nickel ore.

[0008] Furthermore, a pressure control component and a temperature control component are installed in the reactor to control the pressure and temperature in the reactor.

[0009] Furthermore, the door panel is hinged to the feed box on one side away from the other door panel, and 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 embedded in the opening, and when the door panel is rotated to the second position, the door panel is located below the feed box.

[0010] 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, one of the feed boxes slides until the door panel at the bottom is located inside the reactor, and the other feed box slides until the door panel at the bottom is located outside the reactor. When the two feed boxes slide to the fourth position, the two feed boxes slide until the door panels at the bottom abut against the reactor.

[0011] Furthermore, a protrusion is formed on the top of the door panel and is adapted to the shape of the bottom opening of the feed box. A sealing ring is provided on the outer side of the protrusion. When the door panel is rotated to close the opening, the protrusion is embedded in the opening, and the sealing ring is provided in the gap between the protrusion and the opening.

[0012] Furthermore, the unloading part includes a rotating rod, a rope and a net bag. The rotating rod is arranged along the sliding direction of the feed box. The rotating rod is rotatable and sealed with the feed 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 bag. The top of the net bag is concave downward to form a cavity for carrying laterite nickel ore.

[0013] Furthermore, the rope and the net bag are both made of stainless steel, a detachable cover is provided on the top of the net bag, and through holes are provided on the net bag and the cover.

[0014] Furthermore, the blanking part 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.

[0015] Furthermore, it also includes two pressure regulating parts, which are fixedly connected to the opposite sides of the two feed boxes respectively, and the output ends of the two pressure regulating parts are respectively connected to the interior of the two feed boxes to adjust the pressure inside the feed boxes.

[0016] Furthermore, it also includes a driving member, which is connected to the two feed boxes and is used to drive the two feed boxes to slide.

[0017] Compared with the prior art, the reaction acid is added to the reactor, and the pressure and temperature in the reactor are adjusted to achieve the conditions of the test process. Since one of the feed boxes slides to the door panel at its bottom and is located inside the reactor, and the other feed box slides to the door panel at its bottom and is located outside the reactor, the door panel at the bottom of the feed box located outside the reactor is opened, and the laterite nickel ore is placed in the corresponding blanking piece. The door panel is closed, and the feed box is slid to move the door panel into the reactor. The door panel is opened and moved downward through the blanking piece so that the laterite nickel ore contained therein is in contact with the reaction acid. After the reaction is completed, the unloading part moves upward to the feed box, the door panel is closed, and it can be moved out of the reactor according to the above steps. At the same time, another feed box can carry new laterite nickel ore to the reactor. During the movement of the above feed box, since the feed box and the through groove opened on the reactor are slidable and sealed, it can be ensured that the reactor is always in a high-pressure state when changing materials, and there is no need to relieve pressure, which effectively shortens the test cycle. At the same time, the removal of the solid phase in the previous reaction and the feeding steps of the laterite nickel ore in the next reaction are carried out simultaneously, further shortening the test cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic diagram of the overall external structure of a laterite nickel ore high pressure acid leaching test system provided by an embodiment of the present invention;

[0019] FIG2 is a schematic diagram of the overall internal structure of a laterite nickel ore high pressure acid leaching test system provided in an embodiment of the present invention;

[0020] FIG3 is a schematic structural diagram of a feed box sliding in a laterite nickel ore high pressure acid leaching test system provided by an embodiment of the present invention;

[0021] FIG4 is a schematic structural diagram of discharge in a laterite nickel ore high pressure acid leaching test system provided by an embodiment of the present invention;

[0022] FIG5 is a schematic structural diagram of the connection between the feed box and the door panel in the laterite nickel ore high pressure acid leaching test system provided by an embodiment of the present invention;

[0023] FIG6 is a schematic structural diagram of the connection between the rope and the net bag in the laterite nickel ore high pressure acid leaching test system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0025] As shown in Figures 1-2, the present invention provides a laterite nickel ore high-pressure acid leaching test system, which includes a reactor 100 and a feeding assembly 200; the feeding assembly 200 includes two feed boxes 210, two door panels 220 and two blanking pieces 230, the two door panels 220 are respectively hinged to the openings opened at the bottom of the two feed boxes 210 for opening and closing the openings, the two feed boxes 210 are fixedly connected, the two feed boxes 210 are slidably and sealedly connected to the through grooves opened on the reactor 100, when one of the feed boxes 210 slides to the door panel 220 at its bottom and is located inside the reactor 100, the other feed box 210 slides to the door panel 220 at its bottom and is located outside the reactor 100, the two blanking pieces 230 are respectively built into the two feed boxes 210 and can move vertically through the openings, and the blanking pieces 230 are used to carry laterite nickel ore.

[0026] During implementation, the reaction acid solution is added to the reactor 100, and the pressure and temperature in the reactor 100 are adjusted to achieve the conditions of the test process. Since one of the feed boxes 210 slides to the door panel 220 at the bottom thereof and is located inside the reactor 100, and the other feed box 210 slides to the door panel 220 at the bottom thereof and is located outside the reactor 100, the door panel 220 at the bottom of the feed box 210 located outside the reactor 100 is opened at this time, and the laterite nickel ore is placed in the corresponding blanking piece 230, the door panel 220 is closed, and the feed box 210 is slid to move the door panel 220 into the reactor 100, and the door panel 220 is opened and moved downward through the blanking piece 230 to allow the laterite nickel ore contained therein to be discharged. The laterite nickel ore contacts the reaction acid solution. After the reaction is completed, the unloading piece 230 moves upward to the feed box 210, the door panel 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 laterite nickel ore to the reactor 100. During the movement of the above-mentioned feed box 210, since the feed box 210 and the through groove opened on the reactor 100 are slidably and sealed, it can be ensured that the reactor 100 is always in a high-pressure state during material replacement, 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 step of the laterite nickel ore in the next reaction are carried out simultaneously, further shortening the test cycle.

[0027] The reactor 100 in this embodiment is a container that can be imagined by those skilled in the art to provide a high-pressure acid leaching reaction for laterite nickel ore.

[0028] In one embodiment, a pressure control component 110 and a temperature control component 120 are installed in the reactor 100 to control the pressure and temperature in the reactor 100. The pressure control component 110 may include a gas cylinder, a booster pump, a valve, and a connecting pipeline. The gas cylinder and the booster pump are connected to the reactor 100 via a connecting pipeline. The valve is installed on the connecting pipeline to control the on-off of the connecting pipeline, thereby realizing the function of controlling the pressure in the reactor 100. The above-mentioned pressure control component 110 is a structure that can be thought of by those skilled in the art, and no further elaboration is made here. At the same time, the above-mentioned temperature control component 120 can adopt an electric heating coil arranged in the interlayer of the reactor 100. Of course, it can also adopt a structure such as an electric heating rod built into the reactor 100. The embodiment of the present invention does not limit this.

[0029] 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 are slidably and sealedly connected to the two annular sealing gaskets respectively.

[0030] In this embodiment, the feed assembly 200 is a structure for conveying laterite nickel ore into the reactor 100 and for extracting the solid phase formed after the reaction of the laterite nickel ore in the reactor 100. The feed assembly 200 includes two feed boxes 210, two door panels 220, and two discharge members 230. The two door panels 220 are hinged to the openings at the bottom of the two feed boxes 210 for opening and closing the openings. The two feed boxes 210 are fixedly connected to each other. The two feed boxes 210 are slidably and sealedly connected to the through slots on the reactor 100. When one feed box 210 slides to the point where its bottom door panel 220 is located inside the reactor 100, the other feed box 210 slides to the point where its bottom door panel 220 is located outside the reactor 100. The two discharge members 230 are respectively built into the two feed boxes 210 and can move vertically through the openings. The discharge members 230 are used to carry the laterite nickel ore.

[0031] In one embodiment, a door panel 220 is hingedly connected to the feed box 210 on a side away from the other door panel 220. The door panel 220 can rotate to a first position and a second position. When the door panel 220 rotates to the first position, the door panel 220 is embedded in the opening. When the door panel 220 rotates to the second position, the door panel 220 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 door panel 220 at the bottom of one feed box 210 is located inside the reactor 100, while the door panel 220 at the bottom of the other feed box 210 is located outside the reactor 100. When the two feed boxes 210 slide to the fourth position, the door panels 220 at the bottom of the two feed boxes 210 abut against the reactor 100.

[0032] As shown in Figure 2, the laterite nickel ore to be reacted is first loaded into the blanking piece 230, and the blanking piece 230 moves up to the feed box 210. At this time, the door panel 220 is closed, and an external force is applied to move the feed box 210 toward the direction close to the reactor 100 until the feed box 210 moves to the fourth position, and the door panel 220 abuts against the bottom of the reactor 100, as shown in Figure 3. At this time, the external force applied to the door panel 220 can be removed, and the door panel 220 continues to move until it moves into the reactor 100. As shown in Figure 4, the door panel 220 rotates downward under the action of its own weight. At this time, the blanking piece 230 can drive the laterite nickel ore carried therein to move down into the reaction acid solution in the reactor 100 for reaction.

[0033] When the reaction is completed, first, the discharge piece 230 moves up to the feed box 210, and the feed box 210 moves in a direction away from the reactor 100. During this process, the door panel 220 abuts against the reactor 100 until it is squeezed to close 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 feed piece can be taken out.

[0034] As shown in Figures 2 and 6, in one embodiment, the unloading member 230 includes a rotating rod 231, a rope 232 and a net bag 233. The rotating rod 231 is arranged along the sliding direction of the feed box 210. The rotating rod 231 rotates and is sealed with 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 bag 233. The top of the net bag 233 is concave downward to form a cavity for carrying laterite nickel ore.

[0035] The rope 232 and net bag 233 are both made of stainless steel. A detachable cover is provided on the top of the net bag 233. Both the net bag 233 and the cover are provided with through-holes. It should be noted that the through-holes in the net bag 233 and the cover can be formed using a process such as punching. The size of the through-holes should ensure that the laterite nickel ore cannot pass through. Furthermore, the net bag 233 and the cover can be connected using a threaded connection or, alternatively, a plug-in connection, which is not limited in this embodiment of the present invention.

[0036] Through the above-mentioned setting, the rotation of the rotating rod 231 can realize the process of loosening the rope 232. For example, by rotating the rotating rod 231 forward, the rope 232 can be continuously wound around the rotating rod 231 to realize the function of moving the net bag 233 upward; by rotating the rotating rod 231 backward, the rope 232 can be continuously lowered to realize the function of moving the net bag 233 downward.

[0037] In order to facilitate driving the rotating rod 231 to rotate, in one embodiment, the blanking member 230 further includes a motor 234, the motor 234 is fixedly connected to the feed box 210, and the output end of the motor 234 is connected to the rotating rod 231 to drive the rotating rod 231 to rotate.

[0038] It should be noted that the sealed rotation connection between the rotating rod 231 and the feed box 210 can adopt the stirring structure of the existing reaction tank, through mechanical seals, packing seals and oil seals, which are structures that can be thought of by those skilled in the art.

[0039] When the feed box 210 slides to a position where the door panel 220 at its bottom is about to move out of the reactor 100, in order to prevent leakage of high-pressure gas in the feed box 210, as shown in FIG5 , in one embodiment, a protrusion is formed on the top of the door panel 220 that is adapted to the shape of the bottom opening of the feed box 210, and a sealing ring 221 is provided on the outer side of the protrusion. When the door panel 220 is rotated to close the opening, the protrusion is embedded in the opening, and the sealing ring 221 is provided in the gap between the protrusion and the opening.

[0040] At the same time, to facilitate the discharge of high-pressure acidic gas from the feed box 210 when the door panel 220 is opened, this embodiment further includes two pressure regulating members 240. The two pressure regulating members 240 are fixedly connected to opposite sides of the two feed boxes 210, respectively. The output ends of the two pressure regulating members 240 are respectively connected to the interiors of the two feed boxes 210 to regulate the pressure inside the feed boxes 210. After the high-pressure acidic gas in the feed boxes 210 is drawn into the feed boxes 210 through the pressure regulating members 240, the door panel 220 is opened, thereby avoiding safety accidents. The pressure regulating members 240 can be implemented, for example, using the structure of the pressure control member 110 described above.

[0041] Through the above arrangement, when the feed box 210 moves to the point where the door panel 220 at its bottom is located inside the reactor 100, the reactor 100 is in a high-pressure state, so that the door panel 220 cannot be opened automatically. At this time, air can be inflated into the feed box 210 through the pressure regulating component 240 to realize the function of opening the door panel 220.

[0042] In one embodiment, a driving member 250 is further included, which is connected to the two feed boxes 210 to drive the two feed boxes 210 to slide. The driving member 250 can be implemented by two cylinders arranged opposite to each other. The two cylinders are connected and the output ends are respectively connected to the two feed boxes 210 to drive the two feed boxes 210 to slide stably.

[0043] Compared with the prior art, the reaction acid solution is added to the reactor 100, and the pressure and temperature in the reactor 100 are adjusted to achieve the conditions of the test process. Since one of the feed boxes 210 slides to the door panel 220 at the bottom thereof and is located inside the reactor 100, and the other feed box 210 slides to the door panel 220 at the bottom thereof and is located outside the reactor 100, the door panel 220 at the bottom of the feed box 210 located outside the reactor 100 is opened at this time, and the laterite nickel ore is placed in the corresponding blanking piece 230, the door panel 220 is closed, and the feed box 210 is slid to move the door panel 220 into the reactor 100, and the door panel 220 is opened and moved downward through the blanking piece 230 so that the laterite nickel ore contained therein is filled. The loaded laterite nickel ore comes into contact with the reaction acid solution. After the reaction is completed, the unloading piece 230 moves upward to the feed box 210, the door panel 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 laterite nickel ore to the reactor 100. During the movement of the above-mentioned feed box 210, since the feed box 210 and the through groove opened on the reactor 100 are slidably and sealed, it can be ensured that the reactor 100 is always in a high-pressure state during material replacement, and no pressure relief is required, which effectively shortens the test cycle. At the same time, the removal of the solid phase in the previous reaction and the feeding step of the laterite nickel ore in the next reaction are carried out simultaneously, further shortening the test cycle.

[0044] The above description is only a preferred specific 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 thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A laterite nickel ore acid high pressure leaching test system, It is characterized in that It includes a reactor and a feed assembly; The feeding assembly includes two feeding boxes, two door panels and two feeding pieces. The two door panels are respectively hinged to the openings opened at the bottom of the two feeding boxes for opening and closing the openings. The two feeding boxes are fixedly connected. The two feeding boxes are slidably and sealedly connected to the through grooves opened on the reactor. When one of the feeding boxes slides to the door panel at its bottom, it is located inside the reactor, and the other feeding box slides to the door panel at its bottom, it is located outside the reactor. The two feeding pieces are respectively built into the two feeding boxes and can move vertically through the openings. The feeding pieces are used to carry laterite nickel ore.

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

3. The laterite nickel ore acid high pressure acid leaching test system according to claim 1, It is characterized in that The door panel is hinged to the feed box at one side away from the other door panel, and 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 embedded in the opening, and when the door panel is rotated to the second position, the door panel is located at a lower position of the feed box.

4. The laterite nickel ore acid high pressure acid leaching test system according to claim 3, It is 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, one of the feed boxes slides until the door panel at the bottom is located inside the reactor, and the other feed box slides until the door panel at the bottom is located outside the reactor. When the two feed boxes slide to the fourth position, the door panels at the bottom of the two feed boxes slide to abut against the reactor.

5. The laterite nickel ore acid high pressure acid leaching test system according to claim 1, It is characterized in that A protrusion matching the shape of the bottom opening of the feed box is formed on the top of the door panel, and a sealing ring is sleeved on the outer side of the protrusion. When the door panel is rotated to close the opening, the protrusion is embedded in the opening, and the sealing ring is arranged in the gap between the protrusion and the opening.

6. The laterite nickel ore acid high pressure acid leaching test system according to claim 1, It is characterized in that The unloading part includes a rotating rod, a rope and a net bag. The rotating rod is arranged along the sliding direction of the feed box, and the rotating rod is rotatable and sealed with the feed 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 bag. The top of the net bag is concave downward to form a cavity for carrying laterite nickel ore.

7. The laterite nickel ore acid high pressure leaching test system according to claim 6, It is characterized in that The rope and the net bag are both made of stainless steel. A detachably connected cover plate is provided on the top of the net bag. Through holes are provided on the net bag and the cover plate.

8. The laterite nickel ore acid high pressure leaching test system according to claim 6, It is characterized in that The unloading member also includes a motor, which is fixedly connected to the feed box, and an output end of the motor is connected to the rotating rod to drive the rotating rod to rotate.

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

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

Images