Mixing mechanism of double-shaft acid mixing machine

Abstract

The utility model discloses a mixing mechanism of a double-shaft acid mixing machine, and relates to the technical field of acid mixing machines, the mixing mechanism of the double-shaft acid mixing machine comprises stirring shafts which are symmetrically arranged and are connected with an acid mixing machine body, and is characterized by also comprising paddles which are uniformly distributed on the outer walls of the stirring shafts, and wear-resistant anticorrosive layers are arranged on the outer walls of the paddles; the coulters are arranged on the outer wall of the stirring shaft respectively; the spraying pipe is detachably connected with the acid mixing machine body and is arranged at the upper end of the stirring shaft. By adopting the mixing of the double-shaft coulters and the paddles, the mixing time is short, the mixing uniformity is high, the acidification effect is better, the wear resistance and the corrosion resistance of the paddles can be improved by arranging the wear-resistant and corrosion-resistant layers, and the service life of the equipment can be longer.

Description

TECHNICAL FIELD

[0001] The utility model relates to acid mixing machine technical field, concretely is a kind of double-shaft acid mixing machine mixing mechanism. BACKGROUND

[0002] In the process of preparing lithium carbonate from lithium grey stone, the particle size after grinding reaches 200 mesh with a passing rate of more than 85%. Through accurate measurement, the lithium grey stone is fully mixed with sulfuric acid in an acid mixing machine and then conveyed. The acid mixing machine is connected with a special feeding screw to an acidification kiln for acidification.

[0003] Since the lithium grey stone is mixed with dilute acid, it is very hard after drying and has acidic residues, which causes the mixing mechanism of the prior art to have the problems of poor wear resistance and short service life. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a kind of double-shaft acid mixing machine mixing mechanism, with the advantages of wear resistance and corrosion resistance, to solve the problem of poor wear resistance and short service life of the prior art.

[0005] To achieve wear resistance and corrosion resistance, the utility model provides the following technical scheme: a kind of double-shaft acid mixing machine mixing mechanism, comprising a stirring shaft symmetrically arranged and connected with the acid mixing machine body, further comprising: a paddle uniformly distributed on the outer wall of the stirring shaft, the outer wall of the paddle is provided with a wear-resistant anticorrosive layer; a plow is arranged on the outer wall of the stirring shaft; a spray pipe is detachably connected with the acid mixing machine body and arranged at the upper end of the stirring shaft.

[0006] Preferably, the wear-resistant anticorrosive layer comprises a hard alloy block and a plasma surfacing layer, the plasma surfacing layer and the hard alloy block are sequentially arranged from inside to outside on the outer wall of the paddle, the plasma surfacing layer is arranged on the contact surface of the paddle and the mixed material, and the hard alloy block is welded on the left and right ends of the paddle.

[0007] Preferably, the outer wall of the hard alloy block is sprayed with a high-temperature hole sealing agent layer.

[0008] Preferably, the outer wall of the hard alloy block and the paddle is sprayed with a tungsten carbide layer.

[0009] Preferably, the spray nozzles of the spray pipe are symmetrically arranged on the outer wall of the spray pipe.

[0010] Preferably, the spray pipe is detachably connected with the acid mixing machine body by arranging a first flange plate.

[0011] Preferably, the paddle is connected with the stirring shaft by arranging a bolt, and the stirring shaft is connected with the acid mixing machine body by arranging a second flange plate.

[0012] Compared with the prior art, the double-shaft acid mixing machine mixing mechanism has the following beneficial effects:

[0013] 1、The double-shaft acid mixing machine mixing mechanism adopts the mixing of double-shaft ploughs and paddles, has short mixing time, high mixing uniformity and better acidification effect.

[0014] 2、A special wear-resistant material is installed on the stirring paddle, and a corrosion-resistant protection is made on the corresponding position by means of plasma surfacing (the material is nickel-based alloy), the hardness and roughness are increased, hard alloy blocks 10*10mm and 10*20mm are brazed on both sides of the paddle, in order to achieve better corrosion-resistant effect, a high-temperature sealing agent is sprayed to achieve uniform distribution of the corrosion-resistant effect on both sides of the paddle, and tungsten carbide (with a corrosion-resistant mixed powder) is sprayed after the completion of the above two constructions, so that the service life of the equipment is longer.

[0015] 3、The overall spraying pipe is convenient to disassemble, and the sulfuric acid and the material are quickly mixed in the acidification process of the acid mixing machine.

[0016] 4、The paddle adopts a bolt connection mode, and the stirring shaft adopts a flange plate connection, so that maintenance and repair are facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is an external structure schematic view of the utility model;

[0018] Figure 2 It is a spraying pipe structure schematic view of the utility model;

[0019] Figure 3 It is a paddle structure schematic view of the utility model;

[0020] Figure 4 It is a plough structure schematic view of the utility model;

[0021] Figure 5 It is a paddle and wear-resistant corrosion-resistant layer structure schematic view of the utility model.

[0022] In the drawing: 1, stirring shaft; 11, second flange plate; 2, paddle; 21, wear-resistant corrosion-resistant layer; 211, hard alloy block; 212, plasma surfacing layer; 213, high-temperature sealing agent layer; 214, tungsten carbide layer; 3, plough; 4, spraying pipe; 41, first flange. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model. Embodiment one

[0024] Please refer to Figures 1-5 The utility model discloses a double shaft mixed acid machine mixing mechanism, including symmetrical setting and with mixed acid machine body connection's stirring shaft 1, still include: paddle 2, its even distribution is in the outer wall of stirring shaft 1, the outer wall of paddle 2 is equipped with wear -resisting anticorrosive layer 21, plough 3, it is multiple setting and respectively installs in the outer wall of stirring shaft 1, spray pipe 4, with mixed acid machine body detachable connection, and set up in the upper end of stirring shaft 1.

[0025] The above design mixes by adopting double shaft plough 3 and paddle 2, and the mixing time is short, the mixing uniformity is high, the acidification effect is better, and the wear resistance and corrosion resistance of the paddle 2 can be improved by arranging the wear-resistant corrosion-resistant layer 21, so that the service life of the equipment is longer.

[0026] Please refer to Figure 1 , 5 The wear-resistant corrosion-resistant layer 21 includes a hard alloy block 211 and a plasma surfacing layer 212, the plasma surfacing layer 212 and the hard alloy block 211 are sequentially arranged from inside to outside on the outer wall of the paddle 2, the plasma surfacing layer 212 is arranged on the contact surface of the paddle 2 and the mixed material, the hard alloy block 211 is welded on the left and right ends of the paddle 2, the outer wall of the hard alloy block 211 is sprayed with a high-temperature hole sealing agent layer 213, the hard alloy block 211 and the outer wall of the paddle 2 are sprayed with a tungsten carbide layer 214, the paddle 2 is connected with the stirring shaft 1 through bolts, the stirring shaft 1 is connected with the mixed acid machine body through a second flange plate 11, by arranging special wear-resistant materials on the stirring paddle 2, plasma surfacing (the material is nickel-based alloy) is performed at the corresponding position for corrosion protection, the hardness and roughness are increased, and hard alloy blocks 211 (10*10mm, 10*20mm) are brazed on both sides of the blade in order to achieve better corrosion protection effect, the high-temperature hole sealing agent is sprayed to achieve uniform distribution of the corrosion protection effect on both sides of the blade, and then the tungsten carbide (with corrosion-resistant mixed powder) is sprayed to make the service life of the equipment longer. Embodiment two

[0027] Based on the above embodiment one, please refer to Figure 1 , Figure 2 The spray nozzles of the spray pipe 4 are symmetrically arranged on the outer wall of the spray pipe 4, the spray pipe 4 is detachably connected with the mixed acid machine body through a first flange plate 41, the whole spray type is convenient to disassemble, the spray nozzles are arranged near the two ends of the stirring shaft 1, the sulfuric acid and the material are quickly mixed during the acidification process of the mixed acid machine, and the mixed acid is uniform.

[0028] The working principle and use process of the utility model are as follows:

[0029] In the process of lithium carbonate prepared from spodumene, the particle size after grinding reaches 200 mesh with a passing rate of more than 85%, and through accurate metering, the material is mixed and transported with sulfuric acid in a mixing acid machine, and then is fed into an acidification kiln through a special feeding screw. The double-shaft mixing acid machine is composed of a shell, a mixing acid shaft group, a transmission device, a base and the like. The material enters the interior from the feeding port and is transported forward under the stirring of the mixing acid shaft group. The acid liquid enters the mixing acid shaft group from the acid inlet and is mixed with the material. The mixing acid shaft group adopts a double-shaft paddle structure. The paddle is welded on the stirring shaft at a special angle. The two shaft paddles move relatively. The paddle moves with the material along the inner wall of the shell and moves to one end, and at the same time, the paddle moves the material left and right. At the overlapping part of the two shaft paddles, a weightless zone is formed. The material and the acid liquid circulate and roll in the weightless state, and are mixed with each other. After a certain period of time, the material is fully wetted and penetrated by the acid liquid, and is discharged from the discharge port.

[0030] When in use, the paddle 2 and the plow 3 on the stirring shaft 1 can have the effects of high hardness and roughness by passing through the ion surfacing layer, the hard alloy block 211, the high-temperature hole sealing agent layer 213 and the tungsten carbide layer 214 when contacting the lithium gray stone and the dilute acid mixture, so that the wear of the paddle 2 is reduced during the mixing process, the service life of the paddle 2 is improved, and the acid liquid is sprayed through the spray pipe 4 to ensure that the sulfuric acid and the material are quickly mixed in the acidification process of the mixing acid machine. The cooperation of the plurality of stirring shafts 1 with the plow 3 and the paddle 2 makes the mixing time shorter, the mixing uniformity higher and the acidification effect better, so as to improve the mixing effect.

Claims

1. A mixing mechanism for a dual-shaft acid mixer, comprising symmetrically arranged stirring shafts (1) connected to the body of the acid mixer, characterized in that, Also includes: The blades (2) are evenly distributed on the outer wall of the stirring shaft (1), and the outer wall of the blades (2) is fitted with a wear-resistant and corrosion-resistant layer (21). The plow blades (3) are multiple and are respectively installed on the outer wall of the stirring shaft (1); The spray pipe (4) is detachably connected to the body of the acid mixing machine and is located at the upper end of the stirring shaft (1).

2. The mixing mechanism of a biaxial acid mixer according to claim 1, characterized in that: The wear-resistant and corrosion-resistant layer (21) includes a cemented carbide block (211) and a plasma overlay layer (212). The plasma overlay layer (212) and the cemented carbide block (211) are arranged sequentially from the inside to the outside on the outer wall of the blade (2). The plasma overlay layer (212) is arranged on the contact surface between the blade (2) and the mixture. The cemented carbide block (211) is welded to the left and right ends of the blade (2).

3. The mixing mechanism of a biaxial acid mixer according to claim 2, characterized in that: The outer wall of the cemented carbide block (211) is coated with a high-temperature sealing agent layer (213).

4. The mixing mechanism of a biaxial acid mixer according to claim 2, characterized in that: The outer walls of the cemented carbide block (211) and the blade (2) are coated with a tungsten carbide layer (214).

5. The mixing mechanism of a biaxial acid mixer according to claim 1, characterized in that: The nozzles of the spray pipe (4) are symmetrically arranged on the outer wall of the spray pipe (4).

6. The mixing mechanism of a biaxial acid mixer according to claim 5, characterized in that: The spray pipe (4) is detachably connected to the body of the acid mixing machine by means of a first flange (41).

7. The mixing mechanism of a biaxial acid mixer according to claim 1, characterized in that: The blade (2) is connected to the stirring shaft (1) by bolts, and the stirring shaft (1) is connected to the body of the acid mixing machine by a second flange (11).

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