CN202558644U

CN202558644U - Removable crucible for metallic silicon purification

Info

Publication number: CN202558644U
Application number: CN2012200796012U
Authority: CN
Inventors: 朱春玲; 张忠义
Original assignee: QINGHAI DASHENG SILICON INDUSTRY Co Ltd
Current assignee: QINGHAI DASHENG SILICON INDUSTRY Co Ltd
Priority date: 2012-03-06
Filing date: 2012-03-06
Publication date: 2012-11-28
Anticipated expiration: 2022-03-06

Abstract

The utility model belongs to the technical field of polycrystalline silicon purification preparation, in particular to a removable crucible for metallic silicon purification. The crucible is composed of four lining layers inside and outside. The inner layer is a heat-resisting layer composed of bricks which are made of high intensity and high temperature resisting material and are provided with seam allowances. A lining layer painted with silicon nitride material is installed on the inner side of the high temperature resisting bricks and is used for protecting purity of material. A decompression layer composed of mixture of quartz sand and hollow spheres is installed on the outer side of the high temperature resisting bricks and is used for dispelling pressure produced by expansion of silicon material. A protective layer formed by light bricks made of hollow sphere material is installed on the outermost layer and is used for preventing the quartz sand and the hollow spheres from outflowing and achieving heat preservation for the crucible.

Description

Pure Silicon Metal is purified and is used dismantled and assembled crucible

Affiliated technical field

The utility model is a kind of removable crucible, is mainly used in the purification of Pure Silicon Metal.Being the core component in the Pure Silicon Metal purification furnace, is the major equipment of metallurgy method purifying polycrystalline silicon.

Background technology

In the production process that adopts the metallurgy method purifying polycrystalline silicon, often use high-temperature material to make crucible, because material is very expensive, the cost of making crucible compares higher.Pure Silicon Metal can volume expanding when crystallization in process of production, and its result will make the crucible damage of breaking, thereby has increased the production cost of high purity metal silicon greatly, will bring inconvenience to production.

Use the dismantled and assembled crucible of refractory materials assembling combination in the said crucible of present technique; Allow Pure Silicon Metal expansion in use to cause crucible to break; Can the disruptive crucible assembly be removed and be reassembled into new crucible; Thereby saved a large amount of crucible raw materials, made the production cost of polysilicon reduce greatly.

Summary of the invention

The technical problem that the utility model will solve is to the high problem of cost; A kind of crucible of reasonable in design, the Pure Silicon Metal purification furnace of practicing thrift cost has been proposed; It mainly is made up of outer watt brick, decompression layer, internal layer watt brick, liner etc., and its principal character is by outermost watt of brick, and then is the decompression layer; Be internal layer watt brick then, the inside is that 4 layers of liner combine again.

The inside and outside four layers of composition of the total lining of the said crucible of the utility model; Its internal layer is a refractory layer, is processed by HS, high temperature material, and watt brick that has seam constitutes; The lining of smearing at the inboard useful silicon nitride material of high temperature resistant watt of brick; In order to the purity of protecting materials, the decompression layer of being made up of silica sand and hollow ball mixture in the outside of high temperature watt brick is in order to clear up the pressure that expands and produce owing to silicon materials; The resist that the thistle tile brick processed with hollow ball material in the outermost layer forms, its effect are to stop silica sand to be incubated with the hollow ball outflow with to crucible.

Description of drawings

Fig. 1 is the structure diagram of the utility model.

Fig. 2 is the structural representation of the utility model watt brick.

The structure of 5. watts of bricks of 1. outer watt brick 2. decompression layer 3. internal layers watt brick 4. liner among the figure

Embodiment

The inside and outside four layers of composition of the total lining of the said crucible of the utility model as shown in the figure; Its internal layer is a refractory layer, is processed by HS, high temperature material, and watt brick that has seam constitutes; The lining of smearing at the inboard useful silicon nitride material of high temperature resistant watt of brick; The decompression layer of forming by silica sand and hollow ball mixture in the outside of high temperature watt brick, the resist that the thistle tile brick of processing with hollow ball material in the outermost layer forms

Claims

1. a Pure Silicon Metal is purified and is used dismantled and assembled crucible, is made up of outer watt brick, decompression layer, internal layer watt brick, liner etc.; It is characterized in that: mainly being by outermost watt of brick, and then is decompression layer, is internal layer watt brick then, and the inside is that 4 layers of liner combine again.

2. the Pure Silicon Metal according to claim 1 dismantled and assembled crucible of purifying is characterized in that: an outer watt brick has seam watt brick.

3. the Pure Silicon Metal according to claim 1 dismantled and assembled crucible of purifying is characterized in that: silica sand and hollow ball mix as the decompression layer.