What are the effects of the thermal field structure of the polycrystalline ingot furnace and the vol

A polysilicon ingot furnace is a silicon remelting equipment used to produce large quantities of qualified solar-grade polysilicon ingots. In production, the polysilicon that meets a certain purity requirement is loaded into the furnace, and heated, melted, oriented for crystal growth, heat treated, and cooled out of the furnace according to the process requirements. This core environment in which polysilicon remelts long crystals is called a thermal field.

The thermal field not only provides a large amount of heat energy for the melting of polysilicon, but also provides a reasonable temperature gradient field to obtain polysilicon crystals that meet the requirements during the crystalline growth process.

The purpose is to provide a well-designed thermal field structure of polysilicon ingot furnace that can effectively improve the quality and weight of polysilicon processing.

It is mainly composed of furnace body (1), the thermal insulation cage body (9) placed in the furnace body (1) with a lifting mechanical boom (11), placed in the thermal insulation cage body (9) inner thermal insulation layer (2), placed in the upper thermal insulation roof plate (10) of the thermal insulation cage (9), the thermal insulation bottom plate (5) of the lower support column (4), the heater (8) fixed in the thermal insulation cage (9) and fixed on the thermal insulation roof (10), and fixed on the support column (4) with crucible (7) and heat exchange table (3) etc. The thermal insulation layer of thermal insulation cage body and thermal insulation bottom plate, thermal insulation roof plate form a closed thermal field chamber, and is divided into upper and lower two parts by the fire stall strip (15) and the lower thermal insulation cage bottom thermal insulation strip (6) chamber, which is energized by copper electrode (12), air intake by air intake pipe (13), and so on.

The design of this structure is reasonable, by the thermal insulation layer in the thermal insulation cage and the thermal insulation bottom, the thermal insulation roof constitutes a closed thermal field chamber, and by the thermal insulation cage bottom insulation strip lower layer will be divided into two parts of the thermal field chamber, so that it forms a vertical and stable temperature ladder in the cavity, during normal production, the polysilicon raw material that is loaded in the crucible is placed on the heat exchange table to complete the whole remelting process of growing crystals, this design has been tested in practical application, not only can produce high-quality silicon ingots, but also has produced the output, It also shortens the overall process time and reduces energy consumption in the crystallization process.

**Can't get in.

The graphite part is heated and load-bearing, and the carbon fiber part is insulated. Drawings are confidential and cannot be given to you.

These are all industry secrets and are generally not leaked, but the heating method of polysilicon ingot furnace is different, and the thermal field structure is also different.

1.The purpose of the furnace body enlargement is to increase the capacity of the thermal field and increase the unit silicon ingot of the ingot furnace when the production time is about the same.

weight, increase productivity. The thermal field must be redesigned according to the actual temperature distribution to improve the ingot casting process, for example.

Jingyuntong 460 furnace and 880 furnace and GT270 and 450 are all furnace bodies to improve the thermal field, which can be used for reference.

2.Now relatively speaking, the 450 type ingot casting process is more mature, the landlord's furnace body is large, the weight of the ingot does not increase, it is recommended to imitate the 450 type, so that the temperature zone is more compact, and the temperature zone is easy to control.

3.The size of the furnace is only one of the decisive factors for the increase in the weight of the ingot, mainly the internal thermal field capacity. The larger the furnace body, the later it is.

There is a margin for thermal field upgrades.

4.The specific parameters are now confidential, and a spy can be sent to the manufacturer to map the site. ^o^

A I don't know very well, but you can next watch a movie software, such as Thunderbolt to see this software is good.

As the furnace body increases, the thermal field division in the furnace will change, which involves a lot of process changes, so it is recommended not to increase the weight of the ingot furnace as much as possible without increasing the output!

That's a waste, I do quartz rods for polycrystalline ingot testing, but until the furnace is very electric, it is too wasteful to put more material.

It will cause temperature fluctuations, resulting in poor crystallization.

1. Furnace body part: mainly furnace cavity, heater, heat insulation cage, heat conduction block, heat insulation plate and insulation material, etc. 2. Software control part: mainly used to run the process formula.

3. Gas part: mainly used for argon gas and exhaust gas in the furnace cavity, 4. Power control part: used to provide current and voltage.

I used a quartz rod for polycrystalline ingot growth testing, hehe, thank you upstairs and the questioner, I also learned!

Clean up the content. 1 .Use a brush to clean the debris outlet of the large top plate and clean the debris thoroughly.

2.Wipe the top and side heaters as well as the CC carbon plate with a scouring pad. The surface of the heater is then cleaned with an industrial vacuum cleaner, and finally the surface of the heater is wiped with alcohol and paper wipe. (Note that you start at the top).

3.For the insulated cage and the crevices of the furnace chamber, special tools can be used for cleaning.

4.After cleaning the upper furnace body, clean the areas that can be cleaned inside and outside the insulation layer.

5.When cleaning graphite fiberboard, clean its overflow port to make it unobstructed.

6.When using a vacuum cleaner to clean up the debris and particles on the overflow cotton, prevent the vacuum cleaner from damaging the overflow cotton due to excessive suction, and remove the debris thoroughly during the cleaning process and check whether the position of the overflow line meets the requirements. (Clean the furnace cavity with a vacuum cleaner in the following order.)

DS coagulation board, graphite fiberboard, spill-proof asbestos, and debris on the inner wall of the cavity until it is confirmed that there is no obvious dirt in the furnace body. ）

7.After the overhaul and cleaning is complete, it is important to make sure that no objects have fallen into the furnace. (Be careful not to leave anything into the furnace body).

8.After loading, stuff the carbon fiber thermal insulation slats on the four sides and let it fit snugly against the crucible bottom plate, after the placement is completed, clean the crucible around with a vacuum cleaner, after all the processing is completed, the operator wipes the two sides of the furnace cavity and the furnace body contact with dust-free paper dipped in alcohol, and then evenly coats a layer of vacuum grease, the appropriate amount of grease can be, do not too much, otherwise it will affect the vacuum and cause waste.