Filtering device for high-purity magnesium chloride

Abstract

The utility model discloses a filtering device of high purity magnesium chloride, relates to anhydrous magnesium chloride preparation technical field, including furnace shell and filtering subassembly, the inside of furnace shell is provided with the filtering subassembly, the filtering subassembly includes porous sieve plate, stainless steel mesh, fastening screw and filter material, the porous sieve plate is fixed in furnace shell inner wall, stainless steel mesh, fastening screw and filter material. And a stainless steel mesh is arranged above the porous sieve plate. According to the high-purity magnesium chloride filtering device, a magnesium chloride two-man ladle discharging pipe is connected with a feeding pipe at the top of a furnace cover, fused magnesium chloride is added into a furnace cavity, the adding amount does not exceed one third of the volume of a furnace shell, after feeding is completed, a feeding pipe valve is closed, and at the moment, the fused magnesium chloride covers a whole filtering assembly; according to the filtering assembly, titanium sponge and foamed ceramic are adopted as filtering materials, the filtering materials are placed on a porous sieve plate and fixed through a stainless steel net, and impurities in the fused magnesium chloride are filtered out.

Description

Technical Field

[0001] The utility model relates to the technical field of anhydrous magnesium chloride preparation, in particular to a filtering device for high-purity magnesium chloride. Background Art

[0002] The preparation technology of anhydrous magnesium chloride has a history of more than 80 years, but its mainstream is still to dehydrate hydrated magnesium chloride. For example, Norsk Hydlo, a major magnesium producer in Europe, mixes magnesite and coke evenly into a mass, calcines it in a vertical furnace, and then chlorinates it to generate anhydrous magnesium chloride for electrolysis. Dow Chemical Company quickly dehydrates by directly adding a small amount of dehydrated chloride to an electrolytic cell containing a large amount of a mixed solution of magnesium chloride, sodium chloride and calcium chloride. However, no matter which method is used, anhydrous magnesium chloride is prepared for the purpose of electrolysis of magnesium. Therefore, the purity of the obtained anhydrous magnesium chloride is not high, and it contains a large amount of calcium chloride and sodium chloride, which cannot be used as a raw material for polyolefin catalysts. Other methods for preparing anhydrous magnesium chloride cannot be mass-produced due to high production costs or energy-saving and environmental protection issues, and are difficult to commercialize. This has also led to the long-term import of high-purity anhydrous magnesium chloride from Japan by manufacturers of polyolefin catalysts in my country.

[0003] In the process of preparing sponge titanium by magnesium thermal reduction, anhydrous magnesium chloride appears as a by-product. Most of its impurities are solid and insoluble in magnesium chloride, and do not have much economic benefit.

[0004] Therefore, in view of this, the existing structural deficiencies are studied and improved, and a filtering device for high-purity magnesium chloride is proposed. Utility Model Content

[0005] The utility model aims to provide a filtering device for high-purity magnesium chloride to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: comprising a furnace shell and a filter assembly, wherein the filter assembly is arranged inside the furnace shell, and the filter assembly comprises a porous sieve plate, a stainless steel mesh, fastening screws and filter material, the porous sieve plate is fixed to the inner wall of the furnace shell, and a stainless steel mesh is arranged above the porous sieve plate, the two sides of the stainless steel mesh are fixed to the porous sieve plate by fastening screws, and the gap between the stainless steel mesh and the porous sieve plate structure is filled with filter material, and the filter material is made of sponge titanium and foam ceramic.

[0007] Furthermore, a furnace cavity is provided inside the furnace shell, and a furnace cover is buckled on the top of the furnace shell.

[0008] Furthermore, a pressure gauge is provided in the middle of the furnace cover, and a feeding pipe is connected to one side of the furnace cover.

[0009] Furthermore, the other side of the furnace cover is connected to a ventilation pipe, and a pipeline pressure regulator is arranged in the middle of the ventilation pipe.

[0010] Furthermore, the side of the furnace chamber is connected to a discharge assembly, and the discharge assembly includes a discharge pipe and a flange. The discharge pipe is connected to the side of the furnace chamber, and a flange is integrally fixed to the end of the discharge pipe.

[0011] Furthermore, the discharge assembly also includes a mounting ring and connecting bolts. The end of the discharge pipe is connected to the mounting ring, and both sides of the mounting ring are fixed to the discharge pipe by connecting bolts.

[0012] Furthermore, the discharging assembly also includes a filter screen, and a triple filter screen is arranged inside the mounting ring, and the triple filter screen is a stainless steel structure with gradually increasing mesh size.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. When the utility model is in use, the magnesium chloride ladle discharge pipe is connected to the feeding pipe on the top of the furnace cover of the present application, and the molten magnesium chloride is added to the furnace cavity, and the added amount does not exceed one-third of the volume of the furnace shell. After the feeding is completed, the feeding pipe valve is closed. At this time, the molten magnesium chloride covers the entire filter assembly and is filtered by gravity. The filter assembly of the present application adopts sponge titanium and foam ceramic as filter materials. The above filter materials are placed on a porous sieve plate and fixed by a stainless steel mesh to filter impurities in the molten magnesium chloride. Thereafter, the vent pipe is opened to fill argon into the furnace cavity to form a pressure difference and accelerate the filtration speed. After the molten magnesium chloride is completely filtered, the vent pipe and the pipeline pressure regulator are closed. After standing for thirty minutes, the vent pipe and the pipeline pressure regulator are opened again, and argon is filled into the furnace through the vent pipe to increase the pressure in the furnace cavity to discharge the filtered molten magnesium chloride. The present application installs a mounting ring composed of a triple filter screen at the discharge pipe, the purpose of which is to prevent the oxide scale, slag and other large impurities that fall off in the reactor from being discharged, improve the filtering effect, and complete the preparation process of high-purity magnesium oxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model device;

[0016] Figure 2 This is a schematic diagram of the structure of the filter assembly of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the discharging component of the utility model.

[0018] In the figure: 1. furnace shell; 2. furnace chamber; 3. filter assembly; 301. porous sieve plate; 302. stainless steel mesh; 303. fastening screws; 304. filter material; 4. furnace cover; 5. pressure gauge; 6. feeding pipe; 7. ventilation pipe; 8. pipeline pressure regulator; 9. discharge assembly; 901. discharge pipe; 902. flange; 903. mounting ring; 904. connecting bolts; 905. filter mesh. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0020] like Figure 1 to Figure 2 As shown, a filtering device for high-purity magnesium chloride includes a furnace shell 1 and a filtering assembly 3. The filtering assembly 3 is arranged inside the furnace shell 1. The filtering assembly 3 includes a porous sieve plate 301, a stainless steel mesh 302, fastening screws 303 and a filter material 304. The porous sieve plate 301 is fixed to the inner wall of the furnace shell 1, and a stainless steel mesh 302 is arranged above the porous sieve plate 301. Both sides of the stainless steel mesh 302 are fixed to the porous sieve plate 301 by fastening screws 303, and the stainless steel mesh 302 and the porous sieve plate 301 have a gap in the structure. The filter assembly 3 is filled with a filter material 304, and the filter material 304 is made of sponge titanium and foam ceramics. After the valve of the feeding pipe 6 is closed, the molten magnesium chloride covers the entire filter assembly 3 and is filtered by gravity. The filter assembly 3 of the present application uses sponge titanium and foam ceramics as filter materials 304. The filter materials 304 are placed on a porous sieve plate 301 and fixed by a stainless steel mesh 302 to filter impurities in the molten magnesium chloride. After that, the ventilation pipe 7 is opened to fill argon gas into the furnace chamber 2 to form a pressure difference and accelerate the filtering speed.

[0021] like Figures 1 to 3As shown, a furnace cavity 2 is opened inside the furnace shell 1, and a furnace cover 4 is buckled on the top of the furnace shell 1, a pressure gauge 5 is arranged in the middle of the furnace cover 4, and a feeding pipe 6 is connected to one side of the furnace cover 4, and a ventilation pipe 7 is connected to the other side of the furnace cover 4, and a pipeline pressure regulator 8 is arranged in the middle of the ventilation pipe 7, and a discharge assembly 9 is connected to the side of the furnace cavity 2, and the discharge assembly 9 includes a discharge pipe 901 and a flange 902, the discharge pipe 901 is connected to the side of the furnace cavity 2, and the flange 902 is fixed to the end of the discharge pipe 901 in an integrated manner, and the discharge assembly 9 also includes a mounting ring 903 and a connecting bolt 904, the end of the discharge pipe 901 is connected with the mounting ring 903, and the two sides of the mounting ring 903 are fixed to the discharge pipe 901 by connecting bolts 904. The discharge assembly 9 also includes a filter screen 905. A triple filter screen 905 is arranged inside the mounting ring 903, and the triple filter screen 905 is a stainless steel structure with a gradually increasing mesh number. After the molten magnesium chloride is completely filtered, the vent pipe 7 and the pipeline pressure regulator 8 are closed. After standing for thirty minutes, the vent pipe 7 and the pipeline pressure regulator 8 are opened again, and argon gas is filled into the furnace through the vent pipe 7 to increase the pressure in the furnace chamber 2 to discharge the filtered molten magnesium chloride. The present application installs a mounting ring 903 composed of a triple filter screen 905 at the discharge pipe 901, the purpose of which is to prevent the discharge of large impurities such as oxide scale and debris that fall off in the reactor, thereby improving the filtering effect and completing the preparation process of high-purity magnesium oxide.

[0022] Working principle: When using the filtering device of high-purity magnesium chloride, the magnesium chloride ladle discharge pipe is connected to the feeding pipe 6 on the top of the furnace cover 4 of the present application, and the molten magnesium chloride is added to the furnace chamber 2, and the added amount does not exceed one-third of the volume of the furnace shell 1. After the feeding is completed, the valve of the feeding pipe 6 is closed. At this time, the molten magnesium chloride covers the entire filter component 3 and is filtered by gravity. The filter component 3 of the present application uses sponge titanium and foam ceramic as filter material 304, and the above filter material 304 is placed on a porous sieve plate 301 and fixed by a stainless steel mesh 302 to filter impurities in the molten magnesium chloride. Then, the vent pipe 7 is opened to fill argon into the furnace chamber 2 to form a pressure difference and accelerate the filtration speed. After all the molten magnesium chloride is filtered, the vent pipe 7 and the pipeline pressure regulator 8 are closed. After standing for thirty minutes, the vent pipe 7 and the pipeline pressure regulator 8 are opened again, and argon is filled into the furnace through the vent pipe 7 to increase the pressure in the furnace chamber 2 to discharge the filtered molten magnesium chloride. The present application installs a mounting ring 903 composed of a triple filter mesh 905 at the discharge pipe 901, the purpose of which is to prevent the discharge of large impurities such as oxide scale and debris that fall off in the reactor, thereby improving the filtration effect and completing the preparation process of high-purity magnesium oxide.

[0023] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A filtering device for high-purity magnesium chloride, characterized in that, The invention comprises a furnace shell (1) and a filter assembly (3), wherein the furnace shell (1) is provided with the filter assembly (3), wherein the filter assembly (3) comprises a porous sieve plate (301), a stainless steel mesh (302), fastening screws (303) and a filter material (304), wherein the porous sieve plate (301) is fixed to the inner wall of the furnace shell (1), and a stainless steel mesh (302) is provided above the porous sieve plate (301), and both sides of the stainless steel mesh (302) are fixed to the porous sieve plate (301) by fastening screws (303), and a filter material (304) is filled in a structural gap between the stainless steel mesh (302) and the porous sieve plate (301), and the filter material (304) is made of titanium sponge and foam ceramic.

2. A filter device for high-purity magnesium chloride according to claim 1, characterized in that, A furnace cavity (2) is provided inside the furnace shell (1), and a furnace cover (4) is buckled on the top of the furnace shell (1).

3. A filter device for high-purity magnesium chloride according to claim 2, characterized in that, A pressure gauge (5) is provided in the middle of the furnace cover (4), and a feeding pipe (6) is connected to one side of the furnace cover (4).

4. A filter device for high-purity magnesium chloride according to claim 2, characterized in that, The other side of the furnace cover (4) is connected to a ventilation pipe (7), and a pipeline pressure regulator (8) is provided in the middle of the ventilation pipe (7).

5. A filtering device for high-purity magnesium chloride according to claim 2, characterized in that, The side of the furnace chamber (2) is connected to a discharge assembly (9), the discharge assembly (9) comprising a discharge pipe (901) and a flange (902), the discharge pipe (901) is connected to the side of the furnace chamber (2), and the flange (902) is integrally fixed to the end of the discharge pipe (901).

6. A filtering device for high-purity magnesium chloride according to claim 5, characterized in that, The discharge assembly (9) further comprises a mounting ring (903) and connecting bolts (904); the end of the discharge pipe (901) is connected to the mounting ring (903), and both sides of the mounting ring (903) are fixed to the discharge pipe (901) via connecting bolts (904).

7. A filtering device for high-purity magnesium chloride according to claim 6, characterized in that, The discharge assembly (9) further comprises a filter screen (905), a triple filter screen (905) is arranged inside the mounting ring (903), and the triple filter screen (905) is a stainless steel structure with gradually increasing mesh sizes.

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