Miniaturized experimental high-pressure glass-lined reaction kettle

Abstract

The invention discloses a miniaturized experimental high-pressure glass-lined reaction kettle which comprises a tank body and a tank cover, fixed flanges are arranged at ports of the tank body and the tank cover, and bolts penetrate through bolt via holes to fixedly connect the tank body and the tank cover; a first high-diameter flange is arranged on the tank cover, a mounting frame fixed through bolts is arranged on the first high-diameter flange, a double-end-face mechanical seal is arranged in the mounting frame, a gasket is arranged between the double-end-face mechanical seal and the first high-diameter flange, and the double-end-face mechanical seal is fixedly connected with the first high-diameter flange through bolts; a feeding hole is formed in the tank cover, and a high-diameter flange is arranged at the feeding hole; a motor is arranged on the mounting frame, a stirring assembly is arranged at the shaft end of the motor, and a discharging port is formed in the bottom of the tank body. Reagent verification can be carried out by utilizing the characteristic of small volume, and serious resource waste is avoided; meanwhile, the tank body and the tank cover are fixed more firmly and sealed more compactly through the arrangement and application of the groove in the fixed flange, and the situation that the glaze layer is damaged due to large pressure is avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of glass-lined reaction kettles, and particularly relates to a small-sized experimental high-pressure glass-lined reaction kettle. BACKGROUND

[0002] A glass-lined reaction kettle is an important industrial equipment in the chemical industry, which is made by attaching a glass lining layer to the surface of a metal base through multiple high-temperature calcinations at about 900 DEG C of a glass lining containing a high amount of silicon; and is widely used in the chemical, pharmaceutical, dye, and food industries; the glass-lined reaction kettle needs to be glazed, including bottom glazing and surface glazing, and the glazing process is relatively complex.

[0003] After searching, it is found that existing glass-lined reaction kettles are mostly large-scale production and processing reaction kettles, including the patent technology of a glass-lined container with magnetic stirring published by the company with the publication number CN113694853A and the patent technology of a high-pressure corrosion-resistant glass-lined reaction kettle with the publication number CN109569472B; a common defect in the use process is that, in the production process of a factory, if chemical reagents need to be synthesized through a glass-lined reaction kettle, the reagent formula needs to be prepared first, and then the synthesis is performed, and the formula needs to be preliminarily debugged and verified during the synthesis, and the synthesis is directly performed in a large-scale reaction kettle. In the reaction kettle in the prior art described above, in the case of unqualified preliminary debugging, it will directly cause great waste of resources, so in order to avoid excessive waste, a small-sized experimental glass-lined reaction kettle can solve the above problems, and the experimental glass-lined reaction kettle is used for verification and adjustment, and in this case, even if the reagent is unqualified, the resource waste rate can be reduced.

[0004] The present application provides a small-sized high-pressure glass-lined reaction kettle. SUMMARY

[0005] The purpose of the present application is to overcome the shortcomings in the prior art, provide a small-sized experimental high-pressure glass-lined reaction kettle, which can use the small volume to adjust and verify the reagents, avoid serious resource waste; at the same time, the setting of the groove on the fixed flange and the application make the fixation between the tank body and the tank cover more firm and the sealing more tight, and also avoid the damage of the glazing layer due to high pressure.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present application is:

[0007] The utility model provides a kind of miniaturization experimental high pressure glass-lined reaction kettle, including tank body and tank cover, tank body and tank cover port are equipped with fixed flange, fixed flange is equipped with bolt through hole, tank body and tank cover are fixedly connected by bolt passing through bolt through hole;The tank cover is equipped with first high diameter flange, and the first high diameter flange is equipped with mounting bracket fixed by bolt, and the mounting bracket is equipped with double mechanical seal, and the double mechanical seal is equipped with gasket between the first high diameter flange, and the double mechanical seal is fixedly connected with the first high diameter flange by bolt;The tank cover is equipped with feed inlet, and the feed inlet is obliquely arranged and is guaranteed to be not interfered with the first high diameter flange, and the feed inlet is provided with high diameter flange;Motor is equipped on the mounting bracket, and the motor shaft end is equipped with stirring assembly, and the stirring assembly is arranged in the tank body;The tank body bottom is equipped with discharge port, and the discharge port is equipped with second high diameter flange.

[0008] The end surface of the fixed flange is provided with a groove; the bolt through hole is provided in the fixed flange with the groove part.

[0009] The mounting bracket is provided with a balance tank, and the balance tank is connected to the double mechanical seal to control the pressure in the balance tank.

[0010] The end surfaces of the fixed flanges on the tank body and the tank cover are provided with sealing pads, which can prevent the liquid in the tank body from flowing out when the tank body and the tank cover are fixed.

[0011] Preferably, the stirring assembly includes a stirring shaft and a stirring arm disposed on the stirring shaft. The stirring shaft is connected to the motor shaft and passes through the double mechanical seal and the first high diameter flange to enter the tank body. The double mechanical seal can stabilize the rotation trajectory of the stirring shaft in addition to providing a sealing function. The stirring effect is achieved by rotating the stirring shaft driven by the motor.

[0012] Preferably, the tank body outer wall is provided with a jacket, and the jacket is provided with a liquid inlet and a liquid outlet. The jacket is heated by heating medium entering and exiting through the liquid inlet and the liquid outlet.

[0013] Preferably, the heating medium is one of heated steam and heated oil.

[0014] Preferably, the tank body is provided with a mounting plate at the fixed flange for fixing and mounting the tank body.

[0015] A preparation process for a miniaturized experimental high pressure glass-lined reaction kettle includes the following specific steps: 1) weld the tank cover and the tank body of the reaction kettle into a shape, then heat and sinter the tank cover and the tank body respectively to eliminate internal stress, and then polish the surface of the steel blank;

[0016] 2) Next, spray and sinter the inner walls of the tank cover and the tank body with a base glaze;

[0017] 3) Then, spray a face glaze to cover the base glaze and sinter it;

[0018] 4) Temperature control sintering process: strictly according to the sintering process and computer automatic temperature rising parameters and curve in step 2 and step 3, the billet is sand blasted twice, and the bottom glaze is sprayed twice (the first bottom glaze is found to have defects, and the second sintering is carried out after the glaze is supplemented); the process is checked before each sintering, and the thickness of each layer must be controlled within the required range; the appearance and thickness of each side are detected after sintering; segmented heating sintering is used, the furnace is entered at room temperature, and the furnace is sintered at 300-380 DEG C, 500-580 DEG C and 700-780 DEG C temperature stages respectively, the porcelain glaze is more stable to the sudden change of temperature difference, and the corrosion resistance is stronger.

[0019] The composition of the bottom glaze includes, by weight percentage: silicon dioxide 50-60%, aluminum oxide 5-10%, calcium fluoride 3-9%, sodium carbonate 5-10%, boron oxide 12-15%, potassium silicate 10-15%, cobalt oxide 1-2%, fluorine-doped tin oxide 2-3%, and mixed adhesion agent 2-3%;

[0020] The composition of the mixed adhesion agent includes, by weight percentage: bastnaesite ore powder 45-55%, manganese oxide 6-12%, copper oxide 2-6%, nickel oxide 20-35%, titanium dioxide 2-8%, and potassium carbonate 2-5%;

[0021] The composition of the surface glaze includes, by weight percentage: silicon dioxide 50%-60%, sodium oxide 10%-15%, boron trioxide 10%-15%, cobalt oxide 2%-3%, titanium dioxide 0.5%-4%, lithium oxide 1%-3%, and calcium oxide 2%-5%; the surface glaze is sprayed 3-4 times and sintered together.

[0022] The beneficial effects of the present application compared with the prior art are as follows:

[0023] The high-pressure glass lining reaction kettle in the scheme is a small reaction kettle for experiments, which can verify and experiment on the reagent formula with a small amount of material, and the use of a conventional production reaction kettle for experimental deployment will cause a large amount of raw material waste during the experiment, and the use of a small experimental reaction kettle can avoid this drawback and improve the experimental efficiency; meanwhile, compared with the horizontal setting of the feed inlet, the inclined setting of the feed inlet can ensure that the raw materials enter smoothly, and the first high-diameter flange is set to keep the high-diameter flanges at the feed inlet from interfering with each other; further, the groove part at the fixed flange end surface is used for penetrating and fixing the bolts, the groove part not only can avoid setting the glaze layer to reduce the use amount of the bottom glaze and the surface glaze, but also can avoid that the fixed flange end glaze layer is excessively pressed and broken due to the excessive tightening of the bolts;

[0024] Furthermore, the glass enamel layer of the reactor in this solution has high impact resistance, resistance to rapid temperature changes, and acid and alkali resistance. The mixed adhesive in the base glaze plays an indispensable role in improving the above properties. During the firing process, the active ingredients in the mixed adhesive significantly improve the wettability of the molten glaze to the metal, making it easier for the glaze to penetrate into the gaps in the metal lattice and thus better adhere to the inner wall of the reactor. Attached Figure Description

[0025] Appendix Figure 1 This is a schematic diagram of a miniaturized experimental high-pressure glass-lined reactor according to the present invention;

[0026] Appendix Figure 2 This is a top view of a miniaturized experimental high-pressure glass-lined reactor according to the present invention;

[0027] Appendix Figure 3 This is a partially enlarged schematic diagram of a miniaturized experimental high-pressure glass-lined reactor according to the present invention.

[0028] In the diagram: 1. Tank body; 11. Discharge port; 12. Second high-diameter flange; 13. Mounting plate; 2. Tank cover; 3. First high-diameter flange; 4. Jacket; 41. Liquid inlet; 42. Liquid outlet; 5. Feed inlet; 6. Mounting bracket; 61. Double-end mechanical seal; 62. Gasket; 7. Motor; 71. Agitator shaft; 72. Agitator arm; 8. Balance tank; 9. Fixed flange; 91. Sealing gasket; 92. Groove. Detailed Implementation

[0029] To facilitate understanding by those skilled in the art, the following is a detailed explanation in conjunction with the appendix. Figures 1-3 The technical solution of the present invention will be further described in detail below.

[0030] Example 1:

[0031] A miniaturized experimental high-pressure glass-lined reactor includes a tank body 1 and a tank cover 2. Fixed flanges 9 are provided at the ports of the tank body 1 and the tank cover 2, and bolt through holes are provided on the fixed flanges 9. Bolts are used to fix the tank body 1 and the tank cover 2 through the bolt through holes. A first high-diameter flange 3 is provided on the first high-diameter flange 3, and a mounting bracket 6 is fixed on the first high-diameter flange 3 by bolts. A double-end mechanical seal 61 is provided inside the mounting bracket 6, and a gasket 62 is provided between the double-end mechanical seal 61 and the first high-diameter flange 3. The double-end mechanical seal 61 is fixed to the first high-diameter flange 3 by bolts. A feed inlet 5 is provided on the tank cover 2. The feed inlet 5 is obliquely positioned to ensure that it does not interfere with the first high-diameter flange 3, and a high-diameter flange is provided at the feed inlet 5. A motor 7 is provided on the mounting bracket 6, and a stirring assembly is provided at the shaft end of the motor 7. The stirring assembly is located inside the tank body 1. A discharge port 11 is provided at the bottom of the tank body 1, and a second high-diameter flange 12 is provided at the discharge port 11.

[0032] The mounting frame 6 is provided with a balance tank 8, which is communicated with the double-end mechanical seal 61 to control the pressure in the tank body 1.

[0033] The stirring assembly comprises a stirring shaft 71 and a stirring arm 72 arranged on the stirring shaft 71, the stirring shaft 71 is connected with the shaft of the motor 7 and penetrates the double-end mechanical seal 61, the first high-diameter flange 3 and enters the tank body 1, the double-end mechanical seal 61 can stabilize the rotation track of the stirring shaft 71 on the basis of providing sealing effect; the stirring effect is realized by rotating the stirring shaft 71 driven by the motor 7.

[0034] The tank body 1 is provided with a jacket 4, the jacket 4 is provided with a liquid inlet 41 and a liquid outlet 42; the heating medium is heated by entering and exiting the liquid inlet 41 and the liquid outlet 42.

[0035] The heating medium is one of heating steam and heating oil.

[0036] The sealing pad 91 is arranged between the end surface of the fixed flange 9 on the tank body 1 and the fixed flange 9 on the tank cover 2, so that the liquid in the tank body 1 can be prevented from flowing out when the tank body 1 and the tank cover 2 are fixed.

[0037] The mounting plate 13 is arranged at the fixed flange of the tank body 1 to fix and mount the tank body 1.

[0038] The end surface of the fixed flange 9 is provided with a groove 92, and the bolt through hole is arranged at the groove 92 of the fixed flange 9.

[0039] A preparation process of a small-sized experimental high-pressure glass-lined reaction kettle is as follows: 1) the tank cover and the tank body of the reaction kettle are welded to form a shape, then the tank cover and the tank body are heated and fired respectively to eliminate internal stress, and the surface of the steel blank is polished;

[0040] 2) the inner walls of the tank cover and the tank body are then sprayed with a base glaze and fired;

[0041] 3) then the surface glaze is sprayed to cover the base glaze and fired;

[0042] 4) temperature control firing process: in steps 2 and 3, the firing process and the computer automatic temperature rising parameters and curves are strictly followed, the steel blank is sanded twice and sprayed with a base glaze twice, the first base glaze is found to have defects, the defects are repaired by re-glazing and then fired again, the process is checked before each firing, the thickness of each layer must be controlled within the required range, the appearance and thickness of each surface are detected after firing, and segmented heating is used for firing, the furnace is entered at room temperature, and constant temperature firing is performed at 350℃, 550℃ and 750℃ respectively, the porcelain glaze is more stable in temperature difference and more resistant to corrosion;

[0043] The base glaze includes the following components by weight percentage: 50% of silicon dioxide, 5% of aluminum oxide, 5% of calcium fluoride, 8% of sodium carbonate, 14% of boron oxide, 6% of potassium silicate, 1% of cobalt oxide, 3% of fluorine-doped tin oxide, and 2% of mixed adhesive;

[0044] The mixed adhesive includes the following components by weight percentage: 48% of bastnaesite powder, 12% of manganese oxide, 5% of copper oxide, 25% of nickel oxide, 5% of titanium dioxide, and 5% of potassium carbonate;

[0045] The top glaze includes the following components by weight percentage: 60% of silicon dioxide, 10% of sodium oxide, 10% of boron trioxide, 3% of cobalt oxide, 2% of dioxide, 3% of lithium oxide, and 2% of calcium oxide; the top glaze is sprayed for 3 times and fired together to form the top glaze.

[0046] Example 2: Compared with example 1, the difference is that:

[0047] The base glaze includes the following components by weight percentage: 55% of silicon dioxide, 5% of aluminum oxide, 5% of calcium fluoride, 10% of sodium carbonate, 10% of boron oxide, 5% of potassium silicate, 2% of cobalt oxide, 3% of fluorine-doped tin oxide, and 3% of mixed adhesive;

[0048] The mixed adhesive includes the following components by weight percentage: 55% of bastnaesite powder, 10% of manganese oxide, 5% of copper oxide, 35% of nickel oxide, 2% of titanium dioxide, and 3% of potassium carbonate;

[0049] The top glaze includes the following components by weight percentage: 60% of silicon dioxide, 17% of sodium oxide, 10% of boron trioxide, 2% of cobalt oxide, 3% of titanium dioxide, 3% of lithium oxide, and 2% of calcium oxide; the top glaze is sprayed for 4 times and fired together to form the top glaze.

[0050] Example 3: Compared with example 1, the difference is that:

[0051] The base glaze includes the following components by weight percentage: 58% of silicon dioxide, 8% of aluminum oxide, 8% of calcium fluoride, 6% of sodium carbonate, 12% of boron oxide, 5% of potassium silicate, 1% of cobalt oxide, 2% of fluorine-doped tin oxide, and 3% of mixed adhesive;

[0052] The mixed adhesive includes the following components by weight percentage: 50% of bastnaesite powder, 12% of manganese oxide, 2% of copper oxide, 30% of nickel oxide, 6% of titanium dioxide, and 4% of potassium carbonate;

[0053] The top glaze includes the following components by weight percentage: 60% of silicon dioxide, 10% of sodium oxide, 10% of boron trioxide, 2% of cobalt oxide, 2% of titanium dioxide, 3% of lithium oxide, and 2% of calcium oxide; the top glaze is sprayed for 4 times and fired together to form the top glaze.

[0054] Comparative Example 1: The difference between this implementation and Example 2 is that no adhesion agent is involved in the implementation process.

[0055] Comparative Example 2: The difference between this implementation and Example 3 is that no fluorine-doped tin oxide is involved in the implementation process.

[0056] Examples 1-3 and Comparative Examples 1-2 are tested according to the following relevant standards,

[0057] GBT7991.4-2021: Test methods for vitreous enamel layer - Part 4: Determination of resistance to mechanical impact; the adhesion performance of the coating is evaluated by the number of times the coating is damaged by the impact of a specified mass impact hammer from a certain height free-falling onto the surface of the vitreous enamel sample;

[0058] GBT7991.3-2021: Determination of resistance to sudden temperature change; simulate the temperature sudden change condition by alternating cold and hot medium on the surface of the sample, gradually increase the temperature difference until the vitreous enamel layer fails (cracks or peels off), and record the maximum temperature difference before failure;

[0059] GBT7991.1-2021: Determination of resistance to alkaline solution corrosion: test for 168 hours (7 days), evaluate the acid corrosion resistance by mass loss rate, unit: g / m 2.d;

[0060] GB / T7989-2013: Vitreous enamel glaze - Determination of resistance to boiling acid and its vapor corrosion; test for 168 hours (7 days), evaluate the acid corrosion resistance by mass loss rate, unit: g / m 2.d;

[0061] Three groups of experiments were conducted according to the above embodiments, and the results are shown in the following table:

[0062] First group Number of impacts Resistance to alkali mass loss rate Resistance to sudden temperature change difference / °C Resistance to acid mass loss rate Example 1 35 0.8 390 0.75 Example 2 39 0.73 380 0.7 Example 3 38 0.72 385 0.7 Comparative Example 1 25 1.2 280 1.3 Comparative Example 2 20 1.35 295 1.2 First group Number of impacts Resistance to alkali mass loss rate Resistance to sudden temperature change difference / °C Resistance to acid mass loss rate Example 1 32 0.75 395 0.75 Example 2 37 0.6 410 0.65 Example 3 38 0.65 403 0.7 Comparative Example 1 25 1.3 301 1.5 Comparative Example 2 19 1.4 296 1.35

[0063] First group Number of impacts Resistance to alkali mass loss rate Resistance to sudden temperature change difference / °C Resistance to acid mass loss rate Example 1 35 0.7 405 0.8 Example 2 36 0.65 413 0.7 Example 3 39 0.6 409 0.65 Comparative Example 1 26 1.25 311 1.25 Comparative Example 2 21 1.35 325 1.32

[0064] From the data of the three groups of experiments, it is known that the impact resistance of Examples 1-3 using the top glaze and bottom glaze in the present scheme is significantly higher than that of Comparative Examples 1-2; the alkaline mass loss rate and acid mass loss rate values are significantly lower than those of Comparative Examples 1-2; the sudden temperature difference value is significantly higher than that of Comparative Examples 1-2; therefore, it can be concluded that the use of this design scheme improves the impact resistance of the reaction kettle vitreous enamel layer, the ability to resist sudden temperature difference, and its acid resistance and alkali resistance are also greatly improved, especially the use of the adhesion agent in the bottom glaze plays a crucial role.

[0065] In the description of the present application, unless otherwise specified, the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0066] In summary, the electronic or electrical components including but not limited to motors and the like are prior art components, which are obtained by private customization or purchase, and the electrical connection between each component is a conventional circuit connection or electrical connection in the prior art, which is not within the protection scope of the present application;

[0067] The above is only an example and description of the structure of the present application, and those skilled in the art can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, as long as they do not deviate from the structure of the present application or exceed the scope defined by the present claims, which shall be within the protection scope of the present application.

Claims

1. A miniaturized experimental high-pressure glass-lined reactor, comprising a tank body and a tank cover, the tank body and the tank cover are provided with fixed flanges at the ports, the fixed flanges are provided with bolt through holes, and the tank body and the tank cover are fixedly connected by bolts passing through the bolt through holes; characterized in that The first high-diameter flange is arranged on the tank cover, and a mounting rack fixed by bolts is arranged on the first high-diameter flange, a double-end mechanical seal is arranged in the mounting rack, a gasket is arranged between the double-end mechanical seal and the first high-diameter flange, and the double-end mechanical seal is fixedly connected with the first high-diameter flange by bolts; a feeding port is arranged on the tank cover, the feeding port is arranged obliquely and does not interfere with the first high-diameter flange, and a high-diameter flange is arranged at the feeding port; a motor is arranged on the mounting rack, a stirring assembly is arranged at the motor shaft end, and the stirring assembly is arranged in the tank body; a discharging port is arranged at the bottom of the tank body, and a second high-diameter flange is arranged at the discharging port.

2. The miniaturized experimental high-pressure glass-lined reactor according to claim 1, characterized in that The fixed flange end face is provided with a groove; and the bolt through hole is arranged in the fixed flange provided with the groove.

3. The miniaturized experimental high-pressure glass-lined reactor according to claim 1, characterized in that A balance tank is arranged on the mounting rack, and the balance tank is communicated with the double-end mechanical seal to control the pressure in the balance tank body.

4. The miniaturized experimental high-pressure glass-lined reactor according to claim 1, characterized in that A sealing gasket is arranged between the end faces of the fixed flanges on the tank body and the tank cover.

5. The miniaturized experimental high-pressure glass-lined reactor according to claim 1, characterized in that The stirring assembly comprises a stirring shaft and stirring arms arranged on the stirring shaft, the stirring shaft is connected with the motor shaft and passes through the double-end mechanical seal and the first high-diameter flange to enter the tank body, and the double-end mechanical seal can stabilize the rotation track of the stirring shaft on the basis of providing a sealing function.

6. The miniaturized experimental high-pressure glass-lined reactor according to claim 1, characterized in that A jacket is arranged on the outer wall of the tank body, and a liquid inlet and a liquid outlet are arranged on the jacket; and a heating medium is fed in and out through the liquid inlet and the liquid outlet for heating; An installation plate is arranged at the fixed flange of the tank body for fixing and installing the tank body.

7. The miniaturized experimental high-pressure glass-lined reactor according to claim 6, characterized in that The heating medium is one of heated steam and heated oil.

8. A preparation process of a miniaturized experimental high-pressure glass-lined reactor, characterized in that The specific steps are as follows: 1) The tank cover and the tank body of the reaction kettle are welded and formed, and then the tank cover and the tank body are heated and fired respectively to eliminate internal stress, and the surface of the steel blank is polished; 2) Then, the inner walls of the tank cover and the tank body are sprayed with a bottom glaze and fired; 3) Then, the surface glaze is sprayed to cover the bottom glaze and fired; 4) Temperature control firing process: in steps 2 and 3, strictly follow the firing process and computer automatic temperature rising parameters and curve work, sand twice, spray bottom glaze twice, find defects after the first time of spraying bottom glaze, spray again after repairing, and flow detection is performed before each firing, the thickness of each layer must be controlled within the required range, and appearance and thickness detection is performed on each side after firing; use segmented heating firing, enter the furnace at room temperature, and fire at constant temperature at 300-380℃, 500-580℃ and 700-780℃ respectively, the porcelain glaze is more stable in temperature difference and rapid change resistance, and has stronger corrosion resistance.

9. The process for preparing a miniaturized experimental high pressure glass lined reactor according to claim 8, characterized in that The composition of the bottom glaze includes, in terms of percentage by weight: 50-60% of silicon dioxide, 5-10% of aluminum oxide, 3-9% of calcium fluoride, 5-10% of sodium carbonate, 12-15% of boron oxide, 10-15% of potassium silicate, 1-2% of cobalt oxide, 2-3% of fluorine-doped tin oxide, and 2-3% of mixed adhesive; The composition of the mixed adhesive includes, in terms of percentage by weight: 45-55% of fluorocarbon cerium ore powder, 6-12% of manganese oxide, 2-6% of copper oxide, 20-35% of nickel oxide, 2-8% of titanium dioxide, and 2-5% of potassium carbonate. The composition of the surface glaze comprises, by weight percentage, 50-60% of silicon dioxide, 10-15% of sodium oxide, 10-15% of boron trioxide, 2-3% of cobalt oxide, 0.5-4% of titanium dioxide, 1-3% of lithium oxide, and 2-5% of calcium oxide.

10. The process for preparing a miniaturized experimental high pressure glass lined reactor according to claim 8, characterized in that In step 4), segmented heating is used, and the furnace is entered at room temperature, and constant temperature firing is performed at 350℃, 550℃ and 750℃, respectively.

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