High-purity quartz sand vertical chlorination furnace
By designing a vertical chlorination furnace and utilizing a quartz guide plate and electric heating wire structure, the problems of insufficient quartz sand purification and tube rupture were solved, achieving efficient quartz sand purification and production safety.
Patent Information
- Application Number
- CN202423311793.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing technologies make it difficult to achieve complete purification of high-purity quartz sand. Furthermore, quartz sand is prone to agglomeration during calcination, leading to incomplete reaction, and changes in crystal structure can cause quartz tubes to break.
The vertical chlorination furnace design utilizes a quartz guide plate and electric heating wire structure to ensure that the quartz sand is evenly dispersed and fully contacts the chlorination gas. The gas inlet and nitrogen gas pipe promote uniform heating and gas distribution, preventing the quartz sand from agglomerating and expanding in volume.
This method achieves efficient purification of quartz sand, avoids the breakage of quartz tubes, and improves the purity of quartz sand and production safety.
Smart Images
Figure CN223610551U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to quartz sand purification technical field, concretely is a kind of high-purity quartz sand vertical chlorination furnace. BACKGROUND
[0002] The raw ore of high-purity quartz sand is natural quartz ore, and in addition to quartz, the quartz ore usually contains various impurity minerals. Quartz itself often contains certain metal or non-metal element impurities and fluid impurities due to crystal structure defects or micro-cracks. Most impurities can be removed by flotation, magnetic separation, gravity separation, acid leaching, calcination and other means, but it is difficult to achieve the standard of less than 1ppm for certain elements required by high-purity quartz sand.
[0003] Quartz sand is easy to pile up together in the calcination furnace and cannot be dispersed, which leads to the fact that quartz sand and chlorine-containing gas cannot fully contact and chemically react, directly affecting the purity of quartz sand, and in the process of heating, the volume of quartz sand expands due to the phase change of crystal structure, which easily leads to the rupture of quartz tube. SUMMARY
[0004] To solve the above problems, the utility model provides a kind of high-purity quartz sand vertical chlorination furnace, including furnace body, quartz glass tube is vertically arranged in the furnace body, and the cavity formed by furnace body and quartz glass tube is heat preservation cavity, quartz guide plate is arranged on the pipe wall of quartz glass tube, quartz guide plate includes interlayer communicated with heat preservation cavity, electric heating wire is arranged in the interlayer, a plurality of gas inlets are arranged on the side wall of quartz glass tube for uniformly feeding gas into quartz glass tube, charging port and nitrogen gas feeding pipe are arranged at the top of quartz glass tube, and discharge port is arranged at the bottom of quartz glass tube.
[0005] Further, the quartz guide plate protrudes from the pipe wall towards the inside, and the quartz guide plate further includes an upper plate, a lower plate and an inner side wall, the interlayer is surrounded by the upper plate, the lower plate and the inner side wall, and the interlayer is communicated with the heat preservation cavity and not communicated with the quartz glass tube.
[0006] Further, the quartz guide plate is a continuous spiral plate, and the plate surface of the spiral plate on the side close to the center is lower than the side away from the center.
[0007] Further, the quartz guide plate includes a plurality of arc-shaped plates, and the plate surface of the arc-shaped plate on the side close to the center is lower than the side away from the center.
[0008] Further, the width of the quartz guide plate is one-half to two-thirds of the diameter of the quartz glass tube.
[0009] Further, the gas inlet is inclined downward and higher than the quartz guide plate.
[0010] Further, the inner wall of the furnace body is provided with a heat preservation layer.
[0011] The utility model has the advantages of the following:
[0012] The high-purity quartz sand vertical chlorination furnace has the advantages that the quartz guide plate includes a sandwich layer in communication with the heat preservation cavity, the electric heating wire is arranged in the sandwich layer, the quartz sand is dispersed on the quartz guide plate and is uniformly heated, the gas inlet in the sidewall of the quartz glass tube makes the concentration of the chlorination gas in the quartz glass tube uniform, the quartz guide plate is used for reducing the aggregation of the quartz sand and avoiding the volume expansion of the quartz sand during the chlorination process, and the quartz tube is not easily broken. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 The utility model has the advantages of the following:
[0014] Figure 2 The utility model has the advantages of the following:
[0015] Figure 3 The utility model has the advantages of the following:
[0016] Figure 4 The utility model has the advantages of the following:
[0017] Reference Signs: 1. Furnace body, 2. Quartz glass tube, 3. Heat preservation cavity, 4. Quartz guide plate, 5. Gas inlet, 6. Feeding opening, 7. Nitrogen gas gas inlet pipe, 8. Discharge opening, 9. Upper plate, 10. Lower plate, 11. Inner sidewall, 12. Spiral plate, 13. Arc plate, 14. Sandwich layer, 15. Left end sidewall, 16. Right end sidewall. DETAILED DESCRIPTION
[0018] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as the limitation of the utility model.
[0019] Reference Signs: 1. Furnace body, 2. Quartz glass tube, 3. Heat preservation cavity, 4. Quartz guide plate, 5. Gas inlet, 6. Feeding opening, 7. Nitrogen gas gas inlet pipe, 8. Discharge opening, 9. Upper plate, 10. Lower plate, 11. Inner sidewall, 12. Spiral plate, 13. Arc plate, 14. Sandwich layer, 15. Left end sidewall, 16. Right end sidewall. Figure 1 And Figure 2 The utility model proposes a kind of high-purity quartz sand vertical chlorination furnace, comprising: furnace body 1, quartz glass tube 2 is vertically arranged in the furnace body 1, the cavity formed by furnace body 1 and quartz glass tube 2 is heat preservation cavity 3, quartz guide plate 4 is arranged on the tube wall of quartz glass tube 2, the quartz guide plate 4 includes with the sandwich layer 14 of heat preservation cavity 3 communication, electric heating wire is arranged in the sandwich layer 14, quartz glass tube 2 sidewall is provided with multiple gas inlets 5, and uniform gas is input to quartz glass tube 2, the gas inlet 5 is matched with quartz guide plate 4 one by one, quartz glass tube 2 top is provided with feeding opening 6 and nitrogen gas gas inlet pipe 7, quartz glass tube 2 sidewall is provided with multiple gas inlets 5, and uniform gas is input to quartz glass tube 2, quartz glass tube 2 bottom is provided with discharge opening 8.
[0020] The quartz guide plate 4 protrudes the pipe wall towards the inside, and further comprises an upper plate 9, a lower plate 10, and an inner side wall 11, the sandwich layer 14 is surrounded by the upper plate 9, the lower plate 10, and the inner side wall 11, the sandwich layer 14 is communicated with the heat preservation cavity 3 and is not communicated with the quartz glass pipe 2, and the quartz guide plate 4 is used for reducing the aggregation of the quartz sand and avoiding the volume expansion of the quartz sand in the chlorination process, which is easy to cause the rupture of the quartz pipe.
[0021] In an embodiment, referring to Figure 3 , the quartz guide plate 4 is a continuous spiral plate 12, the plate surface of the spiral plate 12 on the side close to the center is lower than the side far from the center, and is used for promoting the dispersion of the quartz sand in the quartz glass pipe 2. Specifically, the spiral plate 12 is provided with horizontal connecting plates at both ends, the connecting plates are smoothly connected with the spiral plate 12 and extend into the heat preservation cavity 3 through the quartz glass pipe 2. The sandwich layer 14 of the quartz guide plate 4 is communicated with the heat preservation cavity 3, and the electric heating wire is laid in the sandwich layer 14.
[0022] In another embodiment, referring to Figure 4 , the quartz guide plate 4 comprises a plurality of arc-shaped plates 13, the plate surface of the arc-shaped plate 13 on the side close to the center is lower than the side far from the center, and is used for promoting the dispersion of the quartz sand in the quartz glass pipe 2. Specifically, the arc-shaped plate 13 comprises an upper plate 9, a lower plate 10, an inner side wall 11, a left end side wall 15, a right end side wall 16, and a sandwich layer 14, and the electric heating wire is laid on the sandwich layer 14 of the arc-shaped plate 13 and the outer side wall of the quartz glass pipe 2.
[0023] The width of the quartz guide plate 4 is one half to two thirds of the diameter of the quartz glass pipe 2, and is used for avoiding the direct falling of the quartz sand to the bottom of the quartz glass pipe 2.
[0024] The gas inlet 5 is obliquely downward arranged and is higher than the quartz guide plate 4, and is used for uniformly feeding the gas into the quartz glass pipe 2 and further dispersing the quartz sand. The inner wall of the furnace body 1 is provided with a heat preservation layer.
[0025] The quartz sand enters into the quartz glass pipe 2 from the feeding port 6, falls on the quartz guide plate 4 below the feeding port 6, the nitrogen gas feeding pipe 7 feeds the nitrogen gas into the quartz glass pipe 2 and disperses the quartz sand in the quartz guide plate 4, the nitrogen gas feeding pipe 7 is used for discharging the air in the quartz glass pipe 2, the electric heating wire arranged in the sandwich layer 14 of the quartz guide plate 4 is heated, the gas inlet 5 of the side wall of the quartz glass pipe 2 feeds the chlorination gas into the quartz glass pipe 2, so as to make the concentration of the chlorination gas in the quartz glass pipe 2 uniform; the gas inlet 5 is obliquely downward arranged and is located on the same side of the quartz guide plate 4, further disperses the quartz sand, and makes the chlorination gas and the quartz sand fully mixed; after the chlorination is completed, the nitrogen gas feeding pipe 7 blows the nitrogen gas to discharge the chlorine gas in the quartz glass pipe 2, the nitrogen gas feeding pipe 7 and the gas inlet 5 blow the gas together to blow the quartz sand to the bottom of the quartz glass pipe 2, and the quartz sand is output from the discharging port 8 at the bottom of the quartz glass pipe 2.
[0026] Although the above-mentioned embodiments have been shown and described, it is to be understood that the above-mentioned embodiments are exemplary and are not to be construed as limiting the present application, and the changes, modifications, replacements and variations made by those of ordinary skill in the art to the above-mentioned embodiments are within the protection scope of the present application.
Claims
1. A vertical chlorination furnace for high purity quartz sand, characterized by, The utility model relates to a quartz glass tube for producing high-purity silicon carbide, which comprises a furnace body, a quartz glass tube vertically arranged in the furnace body, a cavity formed by the furnace body and the quartz glass tube, a quartz guide plate arranged on the wall of the quartz glass tube, a sandwich layer of the quartz guide plate in communication with the cavity, an electric heating wire arranged in the sandwich layer, a plurality of gas inlets arranged on the side wall of the quartz glass tube for uniformly feeding gas into the quartz glass tube, a feeding port and a nitrogen gas feeding pipe arranged on the top of the quartz glass tube, and a discharging port arranged on the bottom of the quartz glass tube. The quartz guide plate protrudes towards the inside of the quartz glass tube, and the quartz guide plate further comprises an upper plate, a lower plate and an inner side wall, the sandwich layer is surrounded by the upper plate, the lower plate and the inner side wall, the sandwich layer is in communication with the cavity and is not in communication with the quartz glass tube.
2. The high purity quartz sand vertical chlorinator according to claim 1, wherein The quartz guide plate is a continuous spiral plate, and the plate surface of the spiral plate on the side close to the center is lower than that on the side far from the center.
3. The high purity quartz sand vertical chlorinator of claim 1, wherein, The quartz guide plate comprises a plurality of arc-shaped plates, and the plate surface of the arc-shaped plate on the side close to the center is lower than that on the side far from the center.
4. The high purity quartz sand vertical chlorinator of claim 1, wherein, The width of the quartz guide plate is one-half to two-thirds of the diameter of the quartz glass tube.
5. The high purity quartz sand vertical chlorinator of claim 1, wherein The gas inlets are arranged obliquely downward and are higher than the quartz guide plate.
6. The high purity quartz sand vertical chlorinator of claim 1, wherein, The inner wall of the furnace body is provided with a heat insulation layer.
7. The high purity quartz sand vertical chlorinator of claim 1, wherein,