Airflow stirring continuous modification device for silica powder
By using an airflow stirring continuous modification device, the problems of uneven mixing and equipment wear during the modification of silicon micro powder were solved, achieving uniform mixing and continuous production, and improving the dispersibility and whiteness of silicon micro powder.
Patent Information
- Application Number
- CN202520354478.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-03
AI Technical Summary
In the existing silicon micropowder modification process, uneven mixing leads to agglomeration and poor dispersibility. Furthermore, the high-stirring modification method cannot be operated continuously, resulting in severe equipment wear.
The continuous modification device using airflow mixing includes an airflow mixing modifier, a pulse dust collector, a fan, a silicon micropowder weighing and feeding hopper, an additive tank, and an atomizer. High-temperature and high-pressure airflow is provided through a high-temperature and high-pressure jet nozzle to uniformly mix the silicon micropowder with the modifier and modify it on the inner wall of the alumina ceramic material.
It achieves uniform mixing of silicon micropowder and modifier, avoids agglomeration, improves dispersibility and whiteness, and the equipment is durable and supports continuous production.
Smart Images
Figure CN223887876U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a continuous modification device for silicon micropowder by airflow stirring, belonging to the technical field of material modification equipment. Background Technology
[0002] Silica powder is an inorganic non-metallic powder material with SiO2 as its main component. It is usually produced from natural quartz and fused quartz through multiple processes such as crushing, ball milling, flotation, acid washing and purification, and high-purity water treatment. Due to its excellent properties such as good temperature resistance, acid and alkali corrosion resistance, poor thermal conductivity, high insulation, low expansion, chemical stability, and high hardness, it is widely used in chemical, electronics, integrated circuit, electrical appliances, plastics, coatings, high-grade paints, rubber, and defense industries. Modified silica powder exhibits even more superior properties.
[0003] Existing methods for modifying silicon micropowder typically involve using high-speed mixers (high-speed agitators). However, this method often results in uneven mixing of the silicon micropowder and modifier, leading to agglomeration and poor dispersibility. Furthermore, the high hardness of silicon micropowder causes wear on the inner wall of the high-speed agitator during modification, reducing its whiteness. High-speed agitator modification is usually intermittent and cannot be used for continuous production. Summary of the Invention
[0004] The purpose of this invention is to solve the problem of agglomeration and poor dispersibility of modified silicon micropowder caused by uneven mixing of silicon micropowder and modifier in traditional silicon micropowder modification. This invention proposes a continuous modification device for silicon micropowder by airflow stirring.
[0005] The technical solution of this utility model is as follows: a continuous modification device for silicon micro powder by airflow stirring, including a pulse dust collector and a fan, and also including an airflow stirring and modification machine, a silicon micro powder weighing and feeding silo, an additive tank, a metering pump and an atomizer.
[0006] The airflow mixing and modifying machine is a vertical cylindrical structure. A classifying wheel is installed on the upper part of the airflow mixing and modifying machine, which is driven by a motor at the top of the machine. The upper discharge port of the airflow mixing and modifying machine is connected to the inlet of a pulse dust collector through a pipe, and the pulse dust collector is provided with negative pressure by a fan. The lower discharge port of the silicon micropowder weighing and feeding hopper is connected to the lower inlet of the airflow mixing and modifying machine through a pipe. The additives in the additive tank enter the lower inlet of the airflow mixing and modifying machine through a metering pump and an atomizer. The bottom of the airflow mixing and modifying machine has multiple high-temperature and high-pressure jet nozzles, and a high-temperature and high-pressure air pump provides high-temperature and high-pressure airflow to the high-temperature and high-pressure jet nozzles.
[0007] The atomizer outlet is connected to the silicon micropowder weighing and feeding hopper outlet and is also connected to the feed inlet at the bottom of the airflow mixing and modifying machine.
[0008] The inner wall material and the classifying wheel of the airflow mixing and modifying machine are both made of alumina ceramic material.
[0009] The high-temperature and high-pressure jet nozzle has a jet pressure of 0.8~1.2MPa and a jet temperature of 100~120℃.
[0010] The beneficial effects of this utility model are as follows: The silicon micropowder continuously modified by airflow mixing provides a process where silicon micropowder is conveyed into the pipeline through the outlet of the feed hopper. Simultaneously, a modifying agent is conveyed to an atomizer via a metering pump according to a pre-designed ratio. After atomization, the modifying agent is sprayed into the pipeline and mixed evenly with the silicon micropowder. The mixture is then conveyed into the airflow mixing and modifying machine, where three high-pressure air jets provide high-pressure airflow, ensuring thorough and uniform mixing of the silicon micropowder and the modifying agent within the machine. This process disperses agglomerated particles while simultaneously coating the surface of the silicon micropowder with the modifying agent. The dispersed modified silicon micropowder particles are then collected by a pulse dust collector via a classifying wheel. This effectively avoids wear and tear on the equipment during the silicon micropowder modification process, preventing problems such as reduced whiteness of the silicon micropowder.
[0011] This utility model has many advantages, such as simple process, good modification effect, safety and durability, and sustainable production. Attached Figure Description
[0012] Figure 1 Here is a schematic diagram of the structure of the device of this utility model:
[0013] In the diagram, 1 is the silicon micropowder weighing and feeding hopper; 2 is the additive tank; 3 is the metering pump; 4 is the atomizer; 5 is the motor; 6 is the high-temperature and high-pressure jet nozzle; 7 is the classifier wheel; 8 is the airflow mixing and modifying machine; 9 is the pulse dust collector; and 10 is the fan. Detailed Implementation
[0014] The specific embodiments of this utility model are as follows: Figure 1 As shown.
[0015] This embodiment discloses a continuous modification device for silicon micropowder by airflow mixing, comprising a pulse dust collector 9 and a fan 10. The device also includes an airflow mixing and modifying machine 8, a silicon micropowder weighing and feeding hopper 1, an additive tank 2, a metering pump 3, and an atomizer 4. The airflow mixing and modifying machine is a vertical cylindrical structure. A classifying wheel 7 is installed on the upper part of the airflow mixing and modifying machine, which is driven by a motor 5 at the top of the airflow mixing and modifying machine. The upper outlet of the airflow mixing and modifying machine is connected to the inlet of the pulse dust collector 9 through a pipe, and the pulse dust collector 9 is provided with negative pressure by the fan 10. The lower outlet of the silicon micropowder weighing and feeding hopper 1 is connected to the lower inlet of the airflow mixing and modifying machine 8 through a pipe. The additives in the additive tank 2 enter the lower inlet of the airflow mixing and modifying machine 8 through the metering pump 3 and the atomizer 4. The bottom of the airflow mixing and modifying machine 8 has multiple high-temperature and high-pressure jet nozzles 6, and a high-temperature and high-pressure air pump provides high-temperature and high-pressure airflow to the high-temperature and high-pressure jet nozzles 6.
[0016] In this embodiment, silicon micropowder is added to the silicon micropowder weighing and feeding hopper 1, and after weighing, it enters the feeding pipe. The modifier is added from the feeding device, atomized by the atomizer 4, and mixed with the silicon micropowder. Together, they enter the airflow mixing and modifying machine 8 for high-speed airflow mixing and modification. The airflow mixing and modifying machine 8 has multiple high-temperature and high-pressure jet nozzles 6 at the bottom. A high-temperature and high-pressure air pump provides high-temperature and high-pressure airflow to the high-temperature and high-pressure jet nozzles 6, so that the silicon micropowder and the modifying agent are fully and evenly mixed inside the airflow mixing and modifying machine. While breaking up agglomerated particles, the modifying agent is coated on the surface of the silicon micropowder. The broken modified silicon micropowder particles are then collected by a pulse dust collector through a classifying wheel.
[0017] In this embodiment, the high-temperature and high-pressure jet nozzle provides a jet pressure of 0.8~1.2MPa and a jet temperature of 100~120℃.
[0018] In this embodiment, the inner wall material and the classifying wheel of the airflow mixing modifier are both made of alumina ceramic material. During the modification process of silicon micro powder, the inner wall of the high-speed mixer will not be worn, nor will the whiteness of the silicon micro powder be reduced, thus greatly improving the quality of the silicon micro powder.
Claims
1. A continuous modification device for silicon micropowder by airflow stirring, comprising a pulse dust collector and a fan, characterized in that, The device also includes an airflow mixing and modifying machine, a silicon micropowder weighing and feeding hopper, an additive tank, a metering pump, and an atomizer. The airflow mixing and modifying machine is a vertical cylindrical structure. A classifying wheel is installed on the upper part of the airflow mixing and modifying machine, and the classifying wheel is driven by a motor at the top of the airflow mixing and modifying machine. The upper outlet of the airflow mixing and modifying machine is connected to the inlet of a pulse dust collector through a pipe, and the pulse dust collector is provided with negative pressure by a fan. The lower outlet of the silicon micropowder weighing and feeding hopper is connected to the lower inlet of the airflow mixing and modifying machine through a pipe. The additives in the additive tank enter the lower inlet of the airflow mixing and modifying machine through the metering pump and the atomizer. The bottom of the airflow mixing and modifying machine has multiple high-temperature and high-pressure jet nozzles, and a high-temperature and high-pressure air pump provides high-temperature and high-pressure airflow to the high-temperature and high-pressure jet nozzles.
2. The continuous modification device for silicon micropowder by airflow stirring according to claim 1, characterized in that, The atomizer's outlet is connected to the silicon micropowder weighing and feeding hopper's outlet, and then connected to the feed inlet at the bottom of the airflow mixing and modifying machine.
3. The continuous modification device for silicon micropowder by airflow stirring according to claim 1, characterized in that, The inner wall material and the classifying wheel of the airflow mixing and modifying machine are both made of alumina ceramic material.
4. The continuous modification device for silicon micropowder by airflow stirring according to claim 1, characterized in that, The high-temperature and high-pressure jet nozzle has a jet pressure of 0.8~1.2MPa and a jet temperature of 100~120℃.
5. The continuous modification device for silicon micropowder by airflow stirring according to claim 1, characterized in that, The outlet of the additive tank is connected to a metering pump, which is connected to an atomizer via a pipeline. The outlet of the atomizer and the outlet of the weighing hopper are connected together via a pipeline and connected to the inlet of the airflow mixing and modifying machine.