Graphite SiC crucible for melting copper,metal,gold,aluminium in induction furnace

Product Overview

Description

  Graphite SiC crucible for melting copper,metal,gold,aluminium in induction furnace      

It is combined with high purity silicon carbide and ultra fines. Shaped by vibration, made by high sintering. The SiC crucible is an oxide bonded silicon carbide based products, which is used in Kiln Furniture. It is featured with high bending strength at elevated temperature, good abrasion resistance, Resistance to thermal shock, high thermal conductivity and offers a good life.

 

 sic crucible features: 
  a)Excellent Thermal Shock Characteristics 
  b)Corrosion Resistance
  c)As Cast Tight Dimensional Tolerances
  d)High Creep Resistance
  e)Superior Wear Resistance
  f)High strength, extreme hardness,wear resistance, high temperature tolerance, corrosion resistance, oxidation resistance,thermal shock resistance, high thermal conductivity, low coefficient of thermal expansion, creep resistance under high temperature and so on.  

 

Programmable properties
Fine grain
Homogeneous structure
High density
Excellent thermal conductivity
High mechanical strength
Proper electrical conductivity
Minimum wettability to molten metals 

 

Graphite sic crucible characteristic : 

1. Thermal stability: According to the quench acute thermal using conditions of graphite crucible, we will specially design the production procedure, so as to ensure the reliability of product quality.
2. Corrosion resistance: Even and fine basic design will delay the erosion of crucible.
3. Impact resistance: Graphite crucible can bear high thermal impact, so any process can be carried out.
4. Acid resistance: The adding of special materials will greatly improve the quality of crucible, especially its index of acid resistance., and will prolong the service life of graphite crucible.
5. High heat Conduction: High content of fixed carbon ensures the good heat conduction, shorten the time of dissolution, and remarkably reduce the energy consumption.
6. Control of metal pollution: The component of material under strict control will ensure that graphite crucible will not pollute the metals when dissolving.
7. Quality stability: The process technology of forming under high pressure and quality guarantee system will fully ensure the stability of quality. 

8 .Using in high temperature process, thermal expansion coefficient is small ,it has resistance strain performance to hot and cold, Strong corrosion resistance to the acid, alkali solution; 

 

 Graphite sic crucible advantages:

a.   Thermal stability: We make special design to assure the quality according to the instant temperature changing working condition.

b.    Corrosion resistance: Precise design extends the ability of corrosion resistance of the crucible. 

c.    Impulsion resistance: graphite crucible can stand very strong heat impulsion, so it can be freely used in any technique process. 

d.    Acid resistance: Impregnation of special stuff can improve the quality of the crucible and it is outstand in the acid resistance. As a result, it can prolong the work life of the graphite crucible. 

e.    Fine thermal conductivity: High content of fixed carbon ensures the good thermal conductivity, shorten the dissolving time and lower the cost of the oil and other energy obviously.

f.      Control of metallic pollution: Strict control of the contents assures that there is no pollution to the metal during dissolving. 

g.     Quality stability: High-pressure manufacturing method and quality control system can pledge the quality stability better.

 

SiC crucible has four different main types .  

Item 1 , pure graphite crucible . The carbon content alwayd > 99% . machine by pure artificial graphite material . 

Item 2 , clay graphite crucible, Rotational Molding type. Main raw material always are clay , natural graphite powder , then making the size by Rotational Molding machine . then baking that .got the clay graphite crucible 

Item 3, sic graphite crucible Rotational Molding type . Main raw material is sic , natural   graphite , Al2O3 .etc   then making the size by Rotational Molding machine . carbon content from 20% to 50% , sic content 20%-40% . with the Prevent oxidation coating . density always 1.7-1.85 

Item 4 , sic graphite crucible isostatic pressing type ,  that always is the europe and japan brand . with high quality . same sic graphite crucible . The best quality crucible made by this way . Density always 1.95-2.2 .

 

Graphite sic crucible technical paramermers:

Standard parameter		Testing data
Refractoriness ≥	1630°C	Refractoriness≥	1635°C
Carbon connent ≥	38%	Carbon connent≥	41.46%
Apparent porosity ≤	35%	Apparent porosity ≤	32%
Bulk density ≥	1.6g/cm3	Bulk density ≥	1.71g/cm3

 

Specification	OD at top	Outer Height	OD at bottom
1000#	640	773	380
800#	630	720	335
500#	540	698	313
400#	520	648	282
350#	485	610	275
300#	470	573	240
250#	450	550	240
200#	398	490	220
150#	370	430	192

 

SiC graphite crucible applications:

1. Graphite crucible can be used for non-ferrous metal smelting and casting, dissolving gold or silver ornaments, analysis of special type steel, sintering hard metal.

2. graphite crucible for smelting gold is specialized in melting gold in headgear and jewelryindustry. That requests graphite material has high density and purity, ablation-resistance, and it can be used many times. We can machine various crucibles accordingto customer's requirement.

3. Machined from high pure graphite and widely used in the gold,silver,platinum and other noble metal's melting.If it's used in oxygen atmosphere,it wil start to be oxygenized when the temperature is higher than 700-800°c. If it's used in the protective atmosphere, it can stand more than 2000°c.

4. widely used in such fields as industrial furnaces, mono-crystalline silicon machinery, mono-crystalline silicon machinery, electron, semi-conductor, metallurgy, oil, chemistry, textile, electrical machinery, electrical equipment, electrical furnace, traffic, communication industry, medicine, etc.

 

ATTENTION:

1,Crucible should be placed at a dry place or placed in a wooden frame

2,The crucible tongs should be matched to the shape of crucible to avoid damage crucible

3,The quantity of the feeding should be based on the capacity of the crucible, do not feed too much or too tight, otherwise the crucible may be bursted

4,We should tap the crucible when clean the slag, in order to avoid damage the crucible body 

5,The pedestal of crucible placed should put some kelp, carbon powder or asbestos powder, pedestal should be matched to the bottom of the crucible, the crucible placed in the center of furnace. 

6,There should be maintained distance between crucible and furnace and the crucible should be fixed firmly by wedge

7,Using an excess oxidizer will reduce the life of the crucible