Inorganic filler pretreatment device for silicone sealant production
By designing an inorganic filler pretreatment device and using hydrochloric acid treatment and modifier modification treatment, the problem of impurities in inorganic fillers affecting the performance of silicone sealants was solved, achieving impurity removal and purity improvement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LINQU JINDI RUBBER IND CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-09
AI Technical Summary
In existing silicone sealant production, inorganic fillers contain impurities such as metal oxides, gravel from quartz sand, and clay minerals, which affect the sealant's performance.
An inorganic filler pretreatment device was designed, including a dispersion kettle, a sand mill, a vibrating screen, a reaction kettle, a filtration device, and a drying device. Impurities are removed and the purity of the filler is improved through hydrochloric acid treatment and modification with a modifier.
It effectively removes metallic impurities and magnesium salts from inorganic fillers, improving the purity of the filler and its compatibility with silicone sealants.
Smart Images
Figure CN224332155U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of silicone sealant technology, and in particular to an inorganic filler pretreatment device for silicone sealant production. Background Technology
[0002] Silicone sealant is a high-molecular-weight elastic sealing material made primarily of polysiloxane, along with fillers, crosslinking agents, catalysts, and other additives. Due to its excellent weather resistance, sealing properties, and adaptability, it is widely used in construction, electronics, and automotive industries. However, in actual production, the raw materials (inorganic fillers) contain impurities such as metal oxides, gravel from quartz sand, and clay minerals. If these impurities are not removed, they will affect the performance of the silicone sealant. Therefore, to address these issues, it is necessary to develop an inorganic filler pretreatment device for silicone sealant production. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide an inorganic filler pretreatment device for the production of silicone sealant, which can effectively remove impurities from inorganic fillers and thus improve the purity of silicone sealant.
[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:
[0005] An inorganic filler pretreatment device for silicone sealant production includes a dispersion vessel, a sand mill at the outlet of the dispersion vessel, a vibrating screen at the outlet of the sand mill, an inlet of a first reaction vessel at the outlet of the vibrating screen, a hydrochloric acid delivery pipeline at the inlet of the first reaction vessel, and a first filtration device at the outlet of the first filtration device. The outlet of the first filtration device is connected to a waste liquid storage tank, and the outlet of the first filtration device is connected to a washing vessel. The outlet of the washing vessel is connected to a second reaction vessel, an inlet of the second reaction vessel at the inlet of the second reaction vessel at the outlet of the second reaction vessel at the outlet of the second filtration device at the outlet of the second filtration device at the outlet of the second filtration device at the outlet of the second filtration device at the outlet of the second filtration device at the outlet of the dryer at the outlet of the dryer at the outlet of the inorganic filler storage tank.
[0006] As an improved technical solution, the dispersion vessel includes a vessel body, the top of which is provided with a feed inlet, a solvent inlet and a dispersant inlet, and the vessel body is provided with a discharge outlet; the interior of the vessel body is provided with a rotating shaft, one end of which is connected to a motor, and multiple stirring rods are provided on the rotating shaft, the ends of which are provided with a hollowed-out stirring plate.
[0007] As an improved technical solution, the first reaction vessel includes a vessel body, the top of which is provided with a feed inlet, an acid inlet, and an exhaust outlet, and the bottom of which is provided with a discharge outlet; the vessel body is provided with a jacket, and the vessel body is provided with a stirring shaft and a pH sensor inside the vessel body; one end of the stirring shaft is connected to a motor, and the stirring shaft is provided with multiple first stirring components and second stirring components, and adjacent first stirring components and second stirring components are provided with auxiliary stirring components; the pH sensor is electrically connected to a controller.
[0008] As an improved technical solution, the first stirring component includes a stirring disc with an inclined hollow structure, and a plurality of stirring plates are provided around the stirring disc.
[0009] As an improved technical solution, the second stirring component includes multiple stirring blades, and the stirring blades are provided with multiple stirring rods.
[0010] As an improved technical solution, the auxiliary stirring component consists of multiple spiral blades.
[0011] As an improved technical solution, both the first filtration device and the second filtration device are plate and frame filters.
[0012] As an improved technical solution, the second reaction vessel includes a vessel body, the top of which is provided with a feed inlet, a modifier inlet and a solvent inlet, and the bottom of which is provided with a discharge outlet; the vessel body is provided with a jacket on the outside, and a rotating shaft is provided inside the vessel body, one end of which is connected to a motor, a stirring frame is provided on the rotating shaft, a plurality of stirring rods are provided on the stirring frame, and the stirring rods are provided with hollow spiral blades.
[0013] After adopting the above technical solution, the beneficial effects of this utility model are:
[0014] The inorganic filler pretreatment device used in the production of silicone sealant includes a dispersion kettle, a sand mill at the outlet of the dispersion kettle, a vibrating screen at the outlet of the sand mill, an inlet of the vibrating screen at the outlet of the vibrating screen at the inlet of the first reaction kettle, an inlet of the first reaction kettle at the liquid inlet ... In actual production, calcium carbonate is added to a dispersion vessel along with a dispersant and a dissolving agent to ensure uniform mixing. The mixture is then ground in a grinding mill. The collected slurry enters a vibrating screen, and after screening, it enters the first reaction vessel. Hydrochloric acid solution, driven by a pump, flows into the first reaction vessel through a hydrochloric acid delivery pipe. The pH of the slurry is controlled at 3-4. After reaction, the metal oxides and magnesium salts dissolve in the hydrochloric acid solution. The slurry then enters the first filtration device. The filtrate enters a waste liquid storage tank. The collected material is conveyed to a washing vessel via a conveyor belt. After washing, the material enters the second reaction vessel. A modifier (stearic acid) is added through a modifier delivery pipe. The modified slurry then enters the second filtration device. The filtered slurry then enters a drying device. The dried calcium carbonate material is stored in an inorganic filler tank. The inorganic filler pretreatment device described above can effectively remove metal impurities and magnesium salts from inorganic fillers (calcium carbonate), and can also modify calcium carbonate. During the modification process, some metal impurities can be removed, improving the purity of calcium carbonate and improving the compatibility between calcium carbonate and silicone sealant base material.
[0015] The dispersion vessel includes a vessel body with a feed inlet, solvent inlet, and dispersant inlet at the top, and a discharge outlet. Inside the vessel body is a rotating shaft, one end of which is connected to a motor. Multiple stirring rods are mounted on the shaft, with perforated stirring plates at their ends. Inorganic filler (calcium carbonate), solvent, and dispersant are added to the vessel body. Once the motor starts, it drives the rotating shaft and the stirring rods and plates to rotate, ensuring thorough mixing of the dispersant, solvent, and inorganic filler for subsequent processing.
[0016] The first reaction vessel includes a vessel body with a feed inlet, an acid inlet, and an exhaust outlet at the top, and a discharge outlet at the bottom. The vessel body is surrounded by a jacket, and inside is a stirring shaft and a pH sensor. One end of the stirring shaft is connected to a motor, and multiple first and second stirring components are mounted on the shaft. Adjacent first and second stirring components are connected to an auxiliary stirring component. The pH sensor is electrically connected to a controller. The slurry and hydrochloric acid enter the vessel body, and the heat transfer medium in the jacket provides the temperature required for the reaction. The pH of the solution is detected by the pH sensor. After the motor starts, it drives the rotating shaft and the first, second, and auxiliary stirring components to stir and mix the slurry and acid, promoting full contact and reaction between metallic impurities and magnesium salts with the hydrochloric acid solution, thereby effectively removing impurities from the slurry.
[0017] The first stirring component includes an inclined, perforated stirring disc, with multiple stirring plates surrounding the disc. The stirring disc and the multiple stirring plates stir the liquid around it, promoting full contact and reaction between metallic impurities and magnesium salts in the slurry and hydrochloric acid, thereby achieving the removal of impurities.
[0018] The second stirring component includes multiple stirring blades, each equipped with multiple stirring rollers. The stirring blades and rollers mix the surrounding liquid, promoting full contact and reaction between the metallic impurities and magnesium salts in the slurry and the hydrochloric acid, thereby achieving the removal of impurities.
[0019] The auxiliary stirring component consists of multiple spiral blades. These blades thoroughly stir the slurry, promoting the full contact and reaction between metallic impurities and magnesium salts in the slurry and hydrochloric acid, thereby achieving the removal of impurities.
[0020] Since both the first and second filtration devices are plate and frame filters, the first filtration device can separate the inorganic packing material from the metallic impurities and magnesium salts, facilitating subsequent processing; the second filtration device can effectively separate the modified inorganic packing material from the solvent, facilitating subsequent processing.
[0021] The second reaction vessel includes a vessel body with a feed inlet, a modifier inlet, and a solvent inlet at the top, and a discharge outlet at the bottom. The vessel body is externally jacketed, and internally housed a rotating shaft. One end of the shaft is connected to a motor, and a stirring frame with multiple stirring rods and perforated spiral blades is mounted on the shaft. Inorganic filler, modifier, and solvent are added to the vessel body. The heat transfer medium in the jacket provides the temperature required for the modification reaction. Once the motor starts, it drives the rotating shaft, stirring frame, stirring rods, and spiral blades to mix the reactants, ensuring thorough contact and reaction between the inorganic filler and modifier, thus significantly improving reaction efficiency. Attached Figure Description
[0022] Figure 1This is a schematic diagram of the raw material pretreatment device for the production of silicone sealant according to this utility model;
[0023] Among them, 1-dispersion vessel, 2-grinding mill, 3-rotary screen, 4-first reaction vessel, 40-first stirring component, 400-stirring plate, 401-stirring plate, 41-second stirring component, 410-stirring blade, 411-stirring rod, 43-auxiliary stirring component, 5-hydrochloric acid conveying pipeline, 6-first filtration device, 7-waste liquid storage tank, 8-washing vessel, 9-second reaction vessel, 90-stirring frame, 91-stirring rod, 92-spiral blade, 10-modifier conveying pipeline, 11-second filtration device, 12-drying device, 13-inorganic filler storage tank. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0025] An inorganic filler pretreatment device for silicone sealant production, such as Figure 1 As shown, the system includes a dispersion vessel 1, a sand mill 2 (purchased from the manufacturer) at the outlet of the dispersion vessel 1, a vibrating screen 3 (purchased from the manufacturer) at the outlet of the sand mill 2, an inlet of the vibrating screen 3 at the outlet of the vibrating screen 3 at the inlet of the first reaction vessel 4, an inlet of the first reaction vessel 4 at the liquid inlet at the liquid outlet ... The vessel is equipped with a detergent outlet, and a filter screen is installed inside the vessel corresponding to the detergent outlet. A rotating shaft is installed inside the vessel, with one end of the shaft connected to a motor and multiple stirring plates on the shaft. In actual application, the detergent is extracted by a vacuum pump. The outlet of the washing vessel 8 is connected to the second reaction vessel 9, the inlet of the second reaction vessel 9 is connected to the modifier conveying pipeline 10, the outlet of the second reaction vessel 9 is connected to the second filtration device 11 (plate and frame filter), the outlet of the second filtration device 11 is connected to the drying device 12 (double cone dryer), and the outlet of the drying device 12 is connected to the inorganic packing storage tank 13.
[0026] In actual production, calcium carbonate is added to a dispersion vessel along with a dispersant and a dissolving agent to ensure uniform mixing. The mixture is then ground in a grinding mill. The collected slurry enters a vibrating screen, and after screening, it enters the first reaction vessel. Hydrochloric acid solution, driven by a pump, flows into the first reaction vessel through a hydrochloric acid delivery pipe, maintaining the pH of the slurry at 3-4. After reaction, the metal oxides and magnesium salts dissolve in the hydrochloric acid solution. The slurry then enters the first filtration device (which separates the inorganic filler from the metal impurities and magnesium salts). The filtrate enters a waste liquid storage tank. The collected material is conveyed to a washing vessel, and after washing, it enters the second reaction vessel via a conveyor belt. A modifier (stearic acid) is added through a modifier delivery pipe. The modified slurry then enters the second filtration device (which effectively separates the modified inorganic filler from the solvent). The filtered slurry then enters a drying device via a conveyor belt. The dried calcium carbonate material is stored in an inorganic filler storage tank. The inorganic filler pretreatment device described above can effectively remove metal impurities and magnesium salts from inorganic fillers (calcium carbonate), and can also modify calcium carbonate. During the modification process, some metal impurities can be removed, improving the purity of calcium carbonate and improving the compatibility between calcium carbonate and silicone sealant base material.
[0027] The dispersion vessel 1 includes a vessel body with a feed inlet, a solvent inlet, and a dispersant inlet at the top, and a discharge outlet. Inside the vessel body is a rotating shaft, one end of which is connected to a motor. Multiple stirring rods are mounted on the shaft, and each stirring rod has a perforated stirring plate at its end. Inorganic filler (calcium carbonate), solvent, and dispersant are added to the vessel body. After the motor starts, it drives the rotating shaft and the stirring rods and plates to rotate, ensuring thorough mixing of the dispersant, solvent, and inorganic filler for subsequent processing.
[0028] The first reaction vessel 4 includes a vessel body with a feed inlet, an acid inlet, and an exhaust outlet at the top, and a discharge outlet at the bottom. The vessel body is fitted with a jacket, and inside is a stirring shaft and a pH sensor. One end of the stirring shaft is connected to a motor, and multiple first stirring components 40 and second stirring components 41 are mounted on the shaft. Adjacent first stirring components 40 and second stirring components 41 are connected to an auxiliary stirring component 42. The pH sensor is electrically connected to a controller (located on one side of the top). The slurry and hydrochloric acid enter the vessel body, and the heat transfer medium in the jacket provides the temperature required for the reaction. The pH of the solution is detected by the pH sensor. After the motor starts, it drives the rotating shaft and the first, second, and auxiliary stirring components to stir and mix the slurry and acid, promoting full contact and reaction between metal impurities and magnesium salts with the hydrochloric acid solution, thereby effectively removing impurities from the slurry. The gas generated by the reaction is discharged from the exhaust outlet and then enters a gas treatment device for further processing.
[0029] The first stirring component 40 includes a stirring disc 400 with an inclined, hollow structure, and a plurality of stirring plates 401 (including a square part and a triangular part of an integral structure) are provided around the stirring disc 400. The stirring disc and the plurality of stirring plates stir the liquid material located around it, so as to promote the full contact and reaction between the metal impurities and magnesium salts in the slurry and the hydrochloric acid, thereby achieving the removal of impurities.
[0030] The second stirring component 41 includes multiple stirring blades 410, and multiple stirring rollers 411 are provided on the stirring blades 410. The stirring blades and stirring rollers stir and mix the surrounding liquid, promoting the full contact and reaction between the metal impurities and magnesium salts in the slurry and the hydrochloric acid, thereby achieving the removal of impurities.
[0031] The auxiliary stirring component 42 consists of multiple spiral blades. The spiral blades thoroughly stir the liquid, promoting the full contact and reaction between the metallic impurities and magnesium salts in the slurry and the hydrochloric acid, thereby achieving the removal of impurities.
[0032] The second reaction vessel 9 includes a vessel body with a feed inlet, a modifier inlet, and a solvent inlet at the top, and a discharge outlet at the bottom. The vessel body is fitted with a jacket, and a rotating shaft is located inside. One end of the shaft is connected to a motor, and a stirring frame 90 is mounted on the shaft. Multiple stirring rods 91 are mounted on the stirring frame, and each stirring rod has a perforated spiral blade 92. Inorganic filler, modifier, and solvent are added to the vessel body. The heat transfer medium in the jacket provides the temperature required for the modification reaction. After the motor starts, it drives the rotating shaft, stirring frame, stirring rods, and spiral blades to stir and mix the reactants, ensuring thorough contact and reaction between the inorganic filler and modifier, thus greatly improving reaction efficiency.
[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An inorganic filler pretreatment device for silicone sealant production, characterized in that, The apparatus includes a dispersion vessel, the outlet of which is connected to a sand mill, the outlet of which is connected to a vibrating screen, the outlet of which is connected to the inlet of a first reaction vessel, the inlet of which is connected to a hydrochloric acid conveying pipeline, and the outlet of which is connected to a first filtration device. The outlet of the first filtration device is connected to a waste liquid storage tank, the outlet of which is connected to a washing vessel, the outlet of which is connected to a second reaction vessel, the inlet of which is connected to a modifier conveying pipeline, the outlet of which is connected to a second filtration device, the outlet of which is connected to a drying device, and the outlet of which is connected to an inorganic filler storage tank.
2. The inorganic filler pretreatment device for silicone sealant production according to claim 1, characterized in that, The dispersion vessel includes a vessel body, the top of which is provided with a feed inlet, a solvent inlet and a dispersant inlet, and the vessel body is provided with a discharge outlet; the interior of the vessel body is provided with a rotating shaft, one end of which is connected to a motor, and multiple stirring rods are provided on the rotating shaft, with a hollowed-out stirring plate at the end of each stirring rod.
3. The inorganic filler pretreatment device for silicone sealant production according to claim 1, characterized in that, The first reaction vessel includes a vessel body, the top of which is provided with a feed inlet, an acid inlet, and an exhaust outlet, and the bottom of which is provided with a discharge outlet; the vessel body is provided with a jacket, and the vessel body is provided with a stirring shaft and a pH sensor; one end of the stirring shaft is connected to a motor, and the stirring shaft is provided with multiple first stirring components and second stirring components, and adjacent first stirring components and second stirring components are provided with auxiliary stirring components; the pH sensor is electrically connected to a controller.
4. The inorganic filler pretreatment device for silicone sealant production according to claim 3, characterized in that, The first stirring component includes a stirring disc, and a plurality of stirring plates are provided around the stirring disc.
5. The inorganic filler pretreatment device for silicone sealant production according to claim 3, characterized in that, The second stirring component includes multiple stirring blades, and the stirring blades are provided with multiple stirring rods.
6. The inorganic filler pretreatment device for silicone sealant production according to claim 3, characterized in that, The auxiliary stirring component consists of multiple spiral blades.
7. The inorganic filler pretreatment device for silicone sealant production according to claim 1, characterized in that, Both the first filtration device and the second filtration device are plate and frame filters.
8. The inorganic filler pretreatment device for silicone sealant production according to claim 1, characterized in that, The second reaction vessel includes a vessel body, with a feed inlet, a modifier inlet, and a solvent inlet at the top, and a discharge outlet at the bottom. The vessel body is equipped with a jacket on the outside and a rotating shaft inside. One end of the rotating shaft is connected to a motor, and a stirring frame is provided on the rotating shaft. The stirring frame is equipped with multiple stirring rods, and the stirring rods are equipped with hollowed-out spiral blades.