Continuous leaching device for crude barium sulfide

Abstract

The invention discloses a crude barium sulfide leaching device. The crude barium sulfide leaching device comprises a feeding system, an auger leaching system, a clarifying and washing system and a deslagging system, the feeding system, the auger leaching system, the clarifying and washing system and the deslagging system are sequentially connected, the feeding system is used for conveying coarse barium to the auger leaching system, the coarse barium in the auger leaching system is mixed with production return water injected into the auger leaching system, first leaching is completed, and a coarse barium sulfide solution is obtained; the crude barium sulfide solution enters the clarifying and washing system, the crude barium sulfide solution is subjected to continuous multiple clarification and washing in the clarifying and washing system to complete secondary leaching, and finished brine and sludge are obtained; the finished marinating liquid is fed into a finished product tank, and the slag sludge is discharged through the slag discharging system. And the extraction rate of barium sulfide is improved.

Description

Technical Field

[0001] The present invention relates to the production of barium salts, in particular to a crude barium sulfide leaching device in the production of barium salts such as barium sulfate and barium carbonate. Background Art

[0002] In the production process of barium salts such as barium sulfate and barium carbonate, barite is generally first calcined to produce crude barium sulfide (referred to as "crude barium"). The barium sulfide content of crude barium varies depending on the grade of barite, usually between 45-75%. Crude barium needs to be leached to extract the soluble barium sulfide from it and turn it into a qualified barium sulfide solution for use in subsequent production processes. The content of crude barium and the particle size of crude barium affect the extraction rate of barium sulfide leaching.

[0003] At present, in the process of crude barium leaching, leaching tanks (referred to as tanks) are usually used for leaching. This method is to set a liquid outlet pipe at the bottom of the tank, and support the screen above and the filter layer above the screen through fixed supports. Pour the crude barium onto the filter layer. The crude barium should not fill the tank. There should be a certain amount of space above the tank. Then inject hot water into the tank. After it is filled with water, it is soaked for a certain period of time. Open the brine gate to release the barium sulfide brine (also known as "yellow water"). The feeding method of the tank is manual feeding, and the more advanced ones are mechanized feeding; after the leaching is completed, the slag is discharged by excavator, and the advanced ones are mechanized.

[0004] The above-mentioned tank leaching has many disadvantages: 1. The production is intermittent operation, and the concentration consistency of the barium sulfide solution is poor; 2. The labor intensity of the workers is high; 3. The operating environment is poor. In the hot summer, the operating environment temperature is high, and it is easy to get heatstroke; in the winter, although the operating environment temperature is low, the workshop is filled with steam, visibility is poor, and safety accidents are prone to occur.

[0005] In the prior art, CN220294161U discloses a barium sulfide black ash leaching device and a continuous leaching production system. The barium sulfide black ash leaching device is provided with a spiral blade with holes for rotary leaching in a closed space, and continuous feeding and slag discharge are achieved through the provided feed port and slag discharge port. A steam outlet is provided for the convenience of collecting and treating tail gas, and it can be connected to the absorption system. The production system using the leaching device can achieve continuous leaching, continuous absorption of the generated waste gas, and filtering to obtain brine. This prior art has the following problems: the crude barium and the brine in the leaching device cannot be fully mixed, and the slag after passing through the leaching device is filtered by a belt filter and discharged as waste. This method is difficult to completely leach the barium sulfide in the slag, and the waste also contains a large amount of incompletely leached barium sulfide, resulting in waste. Summary of the invention

[0006] In view of the defects of the prior art, the present invention provides a crude barium sulfide leaching device.

[0007] A crude barium sulfide leaching device comprises a feeding system, an auger leaching system, a clarifying and washing system and a slag discharging system; the feeding system, the auger leaching system, the clarifying and washing system and the slag discharging system are connected in sequence, the feeding system is used to transport crude barium to the auger leaching system, in the auger leaching system the crude barium is mixed with production return water injected into the auger leaching system, the first leaching is completed, and a crude barium sulfide solution is obtained; the crude barium sulfide solution then enters the clarifying and washing system, in the clarifying and washing system the crude barium sulfide solution is subjected to continuous multi-pass clarification and washing, the second leaching is completed, and a finished brine and slag mud are obtained; the finished brine is fed into a finished product tank, and the slag mud is discharged through the slag discharging system.

[0008] Optionally, the feeding system includes a crude barium feeding auger and a ball mill, the crude barium feeding auger is connected to the inlet of the ball mill, a crude barium feeding bin is arranged on the crude barium feeding auger, the outlet of the ball mill is connected to the auger leaching system through a feeding chute, a dilute brine inlet is installed at the inlet of the ball mill, and the dilute brine comes from the clarification and washing system; the grinding particle size of the ball mill is 6-10 mesh sieve, and the residue is 1-5%; the auger leaching system is composed of a plurality of interconnected leaching augers, the feeding port of the first leaching auger is connected to the feeding chute, the auger of the penultimate leaching auger is provided with a liquid inlet, the production return water is injected through the liquid inlet of the auger of the penultimate leaching auger, and the last leaching auger is a slag stripping auger, on which a tap water spray pipe is installed; the clarification and washing system contains a plurality of groups of interconnected clarification and washing units, each of which The washing unit comprises a continuous clarification tank and a mud mixing washing tank which are connected to each other, and a stirring mechanism is provided in the continuous clarification tank and the mud mixing washing tank; the first group of clarification washing units is used to extract concentrated brine from continuous clarification tank No. 1, and the second group of clarification washing units is used to provide grinding water from continuous clarification tank No. 2 to the feeding system; the multiple groups of clarification washing units all contain a mud mixing washing tank for washing the mud to extract barium sulfide in the mud, and during the mud washing process, the front group of clarification washing units uses the dilute brine of the rear group of clarification washing units separated from it to complete the washing; a main partition is provided between the multiple spiral blades of the leaching auger, and the main partition is vertically fixed on the auger shaft; a secondary partition is provided on the auger spiral blade, and the diameter of the secondary partition is smaller than the diameter of the main partition; the auger leaching system comprises a feeding auger, and the diameter of the feeding auger gradually increases from the feeding end to the discharging end.

[0009] The beneficial effects of the present invention are as follows: the present invention solves the problems of discontinuous leaching, unstable quality of barium sulfide, and poor operating conditions. The present invention realizes the continuity of leaching production, the sealing of leaching equipment, the stabilization of various leaching indicators, and the leaching production process with friendly operating environment. The auger leaching system adopts multiple leaching augers for continuous leaching, and at the same time, a partition is added to the leaching augers. Under the action of the partition, the leaching augers are divided into multiple sections, so that the crude barium and the leaching brine can be fully mixed, thereby improving the leaching rate; the present invention further adds a clarification and washing system, and the sludge in the production process is continuously washed by the clarification and washing system, so that the barium sulfide in the mud is completely leached out, thereby improving the extraction rate of barium sulfide in the waste sludge and avoiding waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of a continuous leaching device;

[0011] Figure 2 This is a structural diagram of the leaching auger;

[0012] Figure 3 for Figure 2 A partial enlarged view of the mid-immersion auger;

[0013] Figure 4 It is a schematic diagram of the structure of the leaching auger in Example 2;

[0014] Figure 5A It is a schematic diagram of the three-dimensional structure of the leaching auger in Example 3;

[0015] Figure 5B is a cross-sectional view of the leaching auger in Example 3;

[0016] Fig. 6A is a perspective view of the clarification and washing system in Example 4;

[0017] Figure 6B A top view of the clarification and washing system in Example 4;

[0018] Figure 6C This is a cross-sectional view of the clarification and washing system in Example 4. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, so that the above-mentioned and other objects, features and advantages of the present invention will be clearer. The same reference numerals in all the drawings indicate the same parts. The drawings are not deliberately drawn to scale, and the focus is on illustrating the subject matter of the present invention.

[0020] It should be understood that the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to a "module" includes reference to one or more such modules. The advantages and features of the present invention and methods of implementing the present invention may be more readily understood by reference to the detailed description and drawings of the embodiments below. However, the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete and will fully convey the concepts of the present invention to those skilled in the art.

[0021] The crude barium sulfide leaching device of the present invention is composed of a feeding system, an auger leaching system, a clarifying and washing system and a slag discharging system. The feeding system, the auger leaching system, the clarifying and washing system and the slag discharging system are connected in sequence, and the feeding system is used to transport the crude barium to the auger leaching system. The crude barium is continuously pushed forward by the rotation of the auger in the auger leaching system and mixed with the injected production return water (low-concentration brine) to complete the first leaching and obtain a crude barium sulfide solution; the crude barium sulfide solution then enters the clarifying and washing system, and the crude barium sulfide solution is clarified and washed in multiple channels in the clarifying and washing system to complete the second leaching and obtain a finished brine and slag mud; the finished brine is fed into the finished product tank, and the slag mud is discharged through the slag discharging system.

[0022] Example 1

[0023] See also Figure 1 The feeding system includes a crude barium feeding auger 1 and a ball mill 4. The crude barium feeding auger 1 is connected to the inlet 3 of the ball mill 4. A crude barium feeding bin 2 is provided on the crude barium feeding auger 1. The outlet 5 of the ball mill 4 is connected to the auger leaching system through a feeding chute 6. The crude barium feeding bin 2 is located above the crude barium feeding auger 1. The crude barium feeding auger 1 is driven to rotate by a motor. The crude barium raw material in the crude barium feeding bin 2 falls onto the crude barium feeding auger 1 under the action of gravity, and enters the ball mill 4 driven by the crude barium feeding auger 1. The crude barium is crushed by the ball mill 4, and the crushed crude barium enters the auger leaching system through the feeding chute 6.

[0024] During production, crude barium is fed into the crude barium feeding bin 2 by a forklift or a hoist. A feeding auger 1 is connected below the bin, and the output end of the auger is connected to the inlet 3 of the ball mill 4. An electronic weighing device is installed in the crude barium feeding bin 2. The feeding weight is set by a computer and the speed of the feeding auger 1 is automatically controlled. The purpose of ball milling is to crush the granular and large agglomerated crude barium formed in the crude barium roasting furnace into a suitable particle size, which is convenient for leaching brine, washing slag and extracting slag. The fineness of the ball mill can be controlled by adjusting the speed and the amount of grinding balls added to the ball mill. The amount of grinding balls of different sizes (diameters) should be added according to the prescribed proportion. The fineness control can also be achieved through this control. In the present invention, the pulverization of the ball mill 4 is wet pulverization. The inlet 3 of the ball mill 4 is equipped with a dilute brine (i.e., a dilute barium sulfide solution, the same below) inlet, and the dilute brine flow rate is adjusted proportionally according to the set auger leaching system feed amount. The feeding flow of this dilute brine should not be too large, otherwise it will affect the washing effect of the slag in the subsequent auger. The grinding particle size of the ball mill 4 is 6-10 mesh sieve, and the residue is 1-5%. Too fine grinding will increase the load of the concentrated brine clarification equipment and mud washing equipment, making production operation difficult; on the contrary, too coarse grinding will cause insufficient dissolution of barium sulfide.

[0025] The auger extraction system consists of multiple interconnected auger extraction systems. Figure 1 The middle auger leaching system consists of six augers, namely, A auger, B auger, C auger, D auger, E auger and F auger. However, those skilled in the art should understand that the number of augers can be adaptively adjusted according to actual process requirements, for example, less than six or more than six. A minimum of three augers can be used, and a maximum of ten augers can be used. The residence time of crude barium in the auger is about 5 hours. It is found in actual production that a larger number of augers has no significant effect on improving the leaching rate of barium sulfide.

[0026] In the present invention, the feed port of A auger is connected to the feed chute 6, the crude barium powder enters A auger through the chute 6, the discharge port of A auger is connected to the feed port of B auger, the discharge port of B auger is connected to the feed port of C auger, ..., so that A auger, B auger, C auger, D auger, E auger and F auger are connected in sequence. A liquid outlet is provided at one end of A auger, a liquid inlet is provided on E auger (the second to last auger), and the production return water is injected through the liquid inlet of E auger, and F auger (the last auger) is a slag lifting auger, on which a tap water spray pipe 6-1 is installed, and the residue coming out of F auger is transported out through the slag skin conveyor 6-2.

[0027] In the present invention, the feed chute 6 is connected to the inlet of the first auger (A auger), and a solid-liquid mixture containing a small amount of solid sludge enters the A auger from the inlet. The liquid level of the brine entering the auger shell is 200mm-300mm above the auger spiral blade. A liquid level gauge is installed in the shell to control the liquid level; an overflow baffle is installed on one side of the auger shell to reduce the solid content in the overflowing brine and prevent the sludge in the auger shell from directly flowing into the side where the discharge pump pipeline is located, causing the discharge pump to be blocked; a discharge pump is installed on one side of the A auger shell, which transfers the semi-finished brine in the A auger into the continuous clarification tank 13.

[0028] See also Figure 2 and Figure 3 For the leaching auger, a rotating auger shaft 14-1 is provided at the center of the auger, and a plurality of spiral sheets 14 are fixed on the auger shaft 14-1. The plurality of spiral sheets 14 are spirally distributed along the auger shaft 14-1. When the auger shaft 14-1 rotates, the plurality of spiral sheets 14 push the crude barium solid-liquid mixture in the auger forward. During the forward movement, the crude barium forms convection with the dilute brine entering from the E auger (the second to last auger), and the barium sulfide in the crude barium is gradually dissolved.

[0029] The outer shell of the leaching auger is equipped with a heating jacket, and steam is introduced into the heating jacket to heat and keep the barium brine in the auger. The temperature of the barium sulfide brine in the auger shell is controlled at 70-80℃. According to the temperature change, the computer automatically opens and closes the steam gate. The transmission power of each leaching auger is transmitted by the motor through the gearbox, chain and sprocket installed at one end of the auger. The support of the auger can be inside or outside the auger shell.

[0030] In the present invention, the first leaching auger and the second leaching auger can be installed horizontally, the third, fourth and fifth leaching auger are installed at an inclination of 1-4 degrees, the sixth auger is a slag lifting auger, which is equipped with a spray pipe and uses tap water to wash the slag so that the barium sulfide content in the barium slag is ≤0.5%. Production return water is added from the fifth auger.

[0031] See again Figure 1 In the clarification and washing system, the crude barium sulfide solution is subjected to continuous clarification and washing to complete the second leaching. The clarification and washing system contains multiple clarification and washing units, each of which contains interconnected continuous clarification tanks and mud mixing washing tanks, and the continuous clarification tanks and mud mixing washing tanks are both equipped with stirring mechanisms. Figure 1As shown, the clarification and washing unit No. 1 includes a continuous clarification tank No. 13 and a mud mixing and washing tank No. 1 9-1, and the bottom mud outlet of the continuous clarification tank No. 13 and the feed inlet of the mud mixing and washing tank No. 1 are connected through a pipeline; correspondingly, the clarification and washing unit No. 2 includes a continuous clarification tank No. 2 12 and a mud mixing and washing tank No. 2 9-2, and the bottom mud outlet of the continuous clarification tank No. 12 and the feed inlet of the mud mixing and washing tank No. 2 are connected through a pipeline; the clarification and washing unit No. 3 includes a continuous clarification tank No. 3 11 and a mud mixing and washing tank No. 3 9-3, and the bottom mud outlet of the continuous clarification tank No. 3 11 and the feed inlet of the mud mixing and washing tank No. 3 are connected through a pipeline; the clarification and washing unit No. 4 includes a continuous clarification tank No. 4 10 and a mud mixing and washing tank No. 4 9-4, and the bottom mud outlet of the continuous clarification tank No. 4 10 and the feed inlet of the mud mixing and washing tank No. 4 are connected through a pipeline.

[0032] The concentrated brine flowing out from one side of the first leaching auger (A auger) is transferred out by a concentrated brine pump. The concentrated brine still contains suspended sludge particles and must be clarified. The concentrated brine is transferred into the clarification and washing system by the concentrated brine pump. The concentrated brine first enters the No. 1 continuous clarification tank 13. The stirring mechanism starts stirring and then stands still, so that the solid and liquid in the No. 1 continuous clarification tank 13 are separated. The clear concentrated barium brine flows out from the upper overflow port of the No. 1 continuous clarification tank 13 and enters the barium sulfide brine finished product tank for use in the next process. The mud is discharged from the mud outlet at the lower end of the No. 1 continuous clarification tank 13 and flows into the No. 1 mud mixing and washing tank 9-1 below.

[0033] During the mud washing process, a certain proportion of washing water is added to the No. 1 mud mixing and washing tank 9-1, wherein the washing water in the No. 1 mud mixing and washing tank 9-1 is clarified dilute brine from the subsequent No. 3 continuous clarification tank 11 separated therefrom, and then the stirring mechanism in the No. 1 mud mixing and washing tank 9-1 is started to mix the mud with the dilute brine, and then the mixed mud is transferred to the No. 2 continuous clarification tank 12, and the clear dilute barium sulfide solution coming out of the No. 2 continuous clarification tank 12 is directly pumped into the ball mill 4 for use, and the concentrated mud flowing out from the bottom directly enters the No. 2 mud mixing and washing tank 9-2.

[0034] Similar to the No. 1 mud mixing and washing tank 9-1, a certain proportion of washing water is added to the No. 2 mud mixing and washing tank 9-2, wherein the washing water in the No. 2 mud mixing and washing tank 9-2 is clarified dilute brine from the subsequent No. 4 continuous clarification tank 10 separated therefrom, and then the stirring mechanism in the No. 2 mud mixing and washing tank 9-2 is started to mix the mud with the dilute brine, and then the mixed mud is transferred to the No. 3 continuous clarification tank 11.

[0035] The clear solution overflowing from the No. 3 continuous clarification tank 11 flows into the No. 1 mud mixing and washing tank 9-1, and the thick mud flowing out from the No. 3 continuous clarification tank 11 enters the No. 3 mud mixing and washing tank 9-3. A certain proportion of washing water is added to the No. 3 mud mixing and washing tank 9-3, wherein the washing water in the No. 3 mud mixing and washing tank 9-3 is the dilute brine obtained from the subsequent slag discharge system. Then, the stirring mechanism in the No. 3 mud mixing and washing tank 9-3 is started to mix the mud with the dilute brine, and then the mixed mud is transferred to the No. 4 continuous clarification tank 10.

[0036] The clear solution overflowing from the No. 4 continuous clarification tank 10 flows into the No. 2 mud mixing and washing tank 9-2, and the thick mud flowing out from the No. 4 continuous clarification tank 10 enters the No. 4 mud mixing and washing tank 9-4. A certain proportion of clean water is added to the No. 4 mud mixing and washing tank 9-4 for washing, and then the stirring mechanism in the No. 4 mud mixing and washing tank 9-4 is started to mix the mud with the clean water. Then the mixed mud is pumped into the slag discharge system, and the mud residue after being filtered by the slag discharge system is sent to the slag mud treatment process.

[0037] The slag discharge system is used for the final filtration of the washed mud. The slag discharge system can use a plate and frame filter press or a belt filter. The filtrate filtered by the plate and frame filter press or the belt filter is sent to the No. 3 mud mixing washing tank 9-3.

[0038] The clarification and washing system of the present invention is composed of multiple groups of clarification and washing units. The first group of clarification and washing units is used to extract concentrated brine (extracted from continuous clarification tank No. 1 13), and the second group of clarification and washing units is used to provide grinding water to the feeding system (extracted from continuous clarification tank No. 2 12). Each group of clarification and washing units contains a mud mixing washing tank for washing the mud to extract barium sulfide in the mud. During the mud washing process, the front group of clarification and washing units uses the dilute brine of the rear group of clarification and washing units separated from it to complete the washing, which can maximize the extraction rate of barium sulfide in the mud.

[0039] The present invention solves the problems of discontinuous leaching, unstable quality of barium sulfide and poor operating conditions. It realizes continuous leaching production, closed leaching equipment, stable leaching indicators and a leaching production process with friendly operating environment. The present invention further adds a clarification and washing system, through which the mud in the production process is continuously washed, so that the barium sulfide in the mud is completely leached out, the extraction rate of barium sulfide in the waste mud is improved, and waste is avoided.

[0040] Example 2

[0041] This embodiment mainly introduces the differences between it and embodiment 1, and the similarities are not repeated. This embodiment improves the leaching auger in embodiment 1.

[0042] like Figure 4 As shown, in this embodiment, a main partition 16 is further arranged between the multiple spiral blades 14 of the leaching auger. The main partition 16 is vertically fixed on the auger shaft 14-1. Multiple main partitions 16, for example, 4, can be arranged in the leaching auger. The leaching auger can be divided into multiple sections by the main partition 16. A through hole 16-1 can be arranged on the main partition 16, so that the brine of each section can flow through from a position close to the spiral blade 14 through the partition. Under the action of the main partition 16, the brine can repeatedly collide and mix with the crude barium in the auger, and the brine can be more fully in contact with the crude barium, thereby increasing the leaching concentration of barium sulfide and improving the washing effect. The main partition 16 can be arranged in only one of the leaching auger, and of course, the main partition 16 can also be arranged in all the leaching auger. For example, a main partition 16 is installed between each auger spiral blade 14 on the second, third, fourth, and fifth auger, so that the sludge can be fully mixed with the dilute brine.

[0043] Furthermore, a secondary partition 15 can be provided on the auger spiral blade 14. The diameter of the secondary partition 15 is smaller than the diameter of the main partition 16. No through hole is provided on the secondary partition 15. The secondary partition 15 mainly plays a delaying role on the crude barium mixed solution, and can prolong the retention time of the crude barium mixed solution in the leaching auger, so that the barium sulfide in the crude barium has sufficient time to dissolve, thereby improving the extraction rate of barium sulfide.

[0044] In this embodiment, the auger leaching system uses multiple leaching augers for continuous leaching, and at the same time, main and auxiliary partitions are added to the leaching augers. Under the action of the partitions, the leaching augers are divided into multiple sections, so that the crude barium and the leaching brine can be fully mixed, thereby improving the leaching rate.

[0045] Example 3

[0046] See again Figure 3 In the present invention, we define the vertical distance D between the vertex of the spiral blade of the leaching auger and the next vertex as the blade diameter (or "auger diameter"). In Example 1, the blade diameters of each auger are equal, which is feasible for subsequent auger B, auger C, etc. However, for the feeding auger (i.e., auger A), there is the following problem: since the feed port of auger A is fed with crude barium that has just been ground and not leached, the feed port and the brine outlet are located at the same end of the auger, which causes part of the crude barium that has not been leached by the auger to be washed out from the brine outlet by the brine, reducing the leaching rate of barium sulfide.

[0047] In view of the above problems, the embodiment changes the blade diameter so that the diameter of the feed auger gradually increases from the feed end to the discharge end. Figure 5A and Figure 5B , Feeding auger 18( Figure 1The A auger in the embodiment has a shell 18-1, on which a crude barium inlet and a brine outlet are arranged, and the crude barium inlet and the brine outlet are located at one end (feeding end) of the shell 18-1; the crude barium outlet and the brine inlet are arranged at the other end (discharging end) of the shell 18-1, and the blade diameter of the feeding auger 18 gradually increases from the feeding end to the discharging end. Such a structure can form a smaller feeding end space at the feeding end, and the crude barium will be greatly squeezed in this space, which makes it easy for the crude barium to be more tightly bonded together, and the bonded crude barium is not easily washed out by the brine. As the rear end space of the feeding auger 18 gradually increases, the crude barium is more likely to move to the rear end space and disperse in the larger space at the rear end, which is conducive to the leaching of barium sulfide.

[0048] Example 4

[0049] This embodiment focuses on improving the clarification and washing system in embodiment 1. In embodiment 1, the clarification and washing system contains multiple groups of clarification and washing units, each of which includes a continuous clarification tank and a mud mixing and washing tank connected to each other. A stirring mechanism is provided in the continuous clarification tank and the mud mixing and washing tank. In this arrangement, the clarification tank and the mud mixing and washing tank are dispersedly arranged, occupying a large area and requiring the construction of a large factory building. The mud enters the mud mixing and washing tank from the clarification tank by gravity sliding, which takes a long time and slows the production speed. In addition, the mud mixing and washing tank needs to be additionally provided with a stirring mechanism, which increases energy consumption.

[0050] like Fig. 6A , Figure 6B , Figure 6C As shown, this embodiment provides an integrated clarification and washing unit, which includes a clarification tank 19, a feeding auger 25, a tee 24, a first sludge pump 20, a connector 21, a second sludge pump 22, a connecting pipe 23 and a transmission shaft 26. The transmission shaft 26 is a through shaft, which passes through the feeding auger 25, the tee 24, the first sludge pump 20, the connector 21 and the second sludge pump 22 in sequence. The clarification tank 19 is located above the feeding auger 25. The clarification tank 19 and the feeding auger 25 can be arranged as a whole. A valve hole 19-1 is opened at the bottom of the clarification tank 19. The valve hole 19-1 can be controlled to be opened or closed. When the valve hole 19-1 is opened, the mud at the bottom of the clarification tank 19 enters the feeding auger 25.

[0051] The first end of the tee 24 is connected to the feeding auger 25, the second end is connected to the inlet of the first sludge pump 20, and the third end 24-1 of the tee is the inlet of the dilute brine. The outlet of the first sludge pump 20 is connected to the inlet of the second sludge pump 22 through the connecting pipe 23, and the outlet of the second sludge pump 22 is connected to the next clarification and washing unit. The first sludge pump 20 and the second sludge pump 22 are fixed together by the connector 21.

[0052] The transmission shaft 26 can be divided into three sections, such as Figure 6C As shown, it consists of a head section 26-1, a middle section 26-2 and a tail end 26-3, and each section is connected in sequence. The head section 26-1 passes through the shell of the feeding auger 25 and is connected to the motor. The middle section 26-2 is mainly located in the feeding auger 25. The middle section 26-2 is provided with a spiral blade 26-4. The tail section 26-3 passes through the tee 24 and is connected to the first sludge pump 20 and the second sludge pump 22, serving as the power input shaft of the first sludge pump 20 and the second sludge pump 22.

[0053] After the clarification tank 19 completes the clarification, the valve hole 19-1 is opened, the motor is started, the transmission shaft 26 rotates under the drive of the motor, the spiral blade 26-4 rotates to start conveying the mud, and at the same time, the tail section 26-3 of the transmission shaft 26 drives the first sludge pump 20 and the second sludge pump 22 to work, and the first sludge pump 20 and the second sludge pump 22 form a vacuum suction on the clarification washing unit. Under the action of this suction force, the mud and the dilute brine are sucked into the first sludge pump 20 through the tee 24, and the first mixing is completed in the rotating chamber 20-1 of the first sludge pump 20. Since the path of the rotating chamber 20-1 is short, in order to ensure that the mud and the dilute brine can be fully mixed, the first sludge pump 20 pumps the mixed mud into the second sludge pump 22 through the connecting pipe 23, and the second mixing is completed in the rotating chamber 22-1 of the second sludge pump 22, thereby achieving full mixing of the mud and the dilute brine.

[0054] The clarification and washing unit in this embodiment has a compact structure, and the mud transportation and mixing adopt the vacuum suction mixing principle, which can complete the mud transportation and mixing in a short time, thereby improving production efficiency. Moreover, the transportation and mixing can be completed by driving a motor, thereby reducing energy consumption.

[0055] Although the technology has been illustrated and described with respect to one or more embodiments, changes and / or modifications may be made to the illustrated examples without departing from the spirit and scope of the appended claims. In particular, with respect to the various functions performed by the above-described components or structures (assemblies, devices, circuits, systems, etc.), the terms used to describe such components (including references to "means") are intended to correspond to any component or structure (e.g., functionally equivalent) that performs the specified function of the described component, even if not structurally equivalent to the disclosed structure that performs the function in the example embodiments described herein, unless otherwise specified. In addition, although a particular feature may have been disclosed with respect to one of several embodiments, such a feature may be combined with one or more other features in other embodiments as may be desired and advantageous for any given or particular application. In addition, to the extent that the terms "comprising," "including," "having," "having," "containing," or variations thereof are used in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term "comprising."

[0056] Many specific details are described in the above description to facilitate a full understanding of the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited to the specific implementation disclosed above. At the same time, any person familiar with the art can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A crude barium sulfide leaching device, characterized in that: The invention comprises a feeding system, an auger leaching system, a clarifying and washing system and a slag discharging system; the feeding system, the auger leaching system, the clarifying and washing system and the slag discharging system are connected in sequence, the feeding system is used to transport the crude barium to the auger leaching system, in the auger leaching system the crude barium is mixed with the production return water injected into the auger leaching system, the first leaching is completed, and a crude barium sulfide solution is obtained; the crude barium sulfide solution then enters the clarifying and washing system, in the clarifying and washing system the crude barium sulfide solution is subjected to continuous multi-pass clarification and washing, the second leaching is completed, and a finished brine and slag mud are obtained; the finished brine is fed into a finished product tank, and the slag mud is discharged through the slag discharging system.

2. The crude barium sulfide leaching device according to claim 1, characterized in that: The feeding system includes a crude barium feeding auger and a ball mill. The crude barium feeding auger is connected to the inlet of the ball mill. A crude barium feeding bin is provided on the crude barium feeding auger. The outlet of the ball mill is connected to the auger leaching system through a feeding chute. A dilute brine inlet is installed at the inlet of the ball mill, and the dilute brine comes from the clarification and washing system.

3. The crude barium sulfide leaching device according to claim 2, characterized in that: The pulverizing particle size of the ball mill is 6-10 mesh, and the residue is 1-5%.

4. The crude barium sulfide leaching device according to claim 1, characterized in that: The auger leaching system consists of a plurality of interconnected leaching augers, the feed port of the first leaching auger is connected to the feed chute, the liquid inlet is arranged on the auger of the penultimate leaching auger, the production return water is injected through the liquid inlet of the auger of the penultimate leaching auger, and the last leaching auger is a slag stripping auger, on which a tap water spray pipe is installed.

5. The crude barium sulfide leaching device according to claim 1, characterized in that: The clarification and washing system comprises a plurality of interconnected clarification and washing units, each of which comprises a continuous clarification tank and a mud mixing and washing tank that are interconnected, and a stirring mechanism is provided in both the continuous clarification tank and the mud mixing and washing tank.

6. The crude barium sulfide leaching device according to claim 5, characterized in that: The first set of clarification and washing units is used to extract concentrated brine from the No. 1 continuous clarification tank, and the second set of clarification and washing units is used to provide grinding water from the No. 2 continuous clarification tank to the feeding system.

7. The crude barium sulfide leaching device according to claim 5, characterized in that: Each clarifying and washing unit contains a mud mixing washing tank for washing the mud to extract barium sulfide in the mud. During the mud washing process, the preceding clarifying and washing unit uses the dilute brine of the subsequent clarifying and washing unit separated therefrom to complete the washing.

8. The crude barium sulfide leaching device according to claim 1, characterized in that: A main partition is arranged between the multiple spiral plates of the leaching auger, and the main partition is vertically fixed on the auger shaft.

9. The crude barium sulfide leaching device according to claim 8, characterized in that: A secondary partition is arranged on the auger spiral sheet, and the diameter of the secondary partition is smaller than the diameter of the main partition.

10. The crude barium sulfide leaching device according to claim 1, characterized in that: The auger leaching system comprises a feeding auger, and the diameter of the feeding auger gradually increases from the feeding end to the discharging end.

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