Industrial Silicon Furnace

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Main application of industrial silicon:
The industrial silicon also called silicon metal, its main application is be the additive agent of non-ferrous alloy. When puts the silicon into some nonferrous metal, it will improve the matrix metal’s strength, solidity and abrasion performance and sometimes can improve the casting property and welding performance. Industrial silicon also can used in silicon steel making which is required strict alloy agent, and used as deoxidizer for smelting special steel and nonferrous matrix alloy. After a series of processing treatment, the industrial silicon can be made to be monocrystalline silicon for electronic industry.

Industrial Silicon--Grade & Chemical composition


Grade

Chemical Composition (%)

Si(%)

impurity content

Fe

Al

Ca

P

1515

>99.6%

≤0.15

≤0.015

≤0.004%

2202

>99.5%

≤0.2

≤0.2

≤0.02

≤0.004%

2203

>99.5%

≤0.2

≤0.2

≤0.03

≤0.004%

2503

>99.5%

≤0.2

≤0.03

≤0.004%

3103

>99.4%

≤0.3

≤0.1

≤0.03

≤0.005%

3303

>99.3%

≤0.3

≤0.3

≤0.03

≤0.005%

411

>99.2%

≤0.4

0.04—0.08

≤0.1

421

>99.2 %

≤0.4

0.1—0.15

≤0.1

441

>99.0 %

≤0.4

≤0.4

≤0.1

553

>98.5 %

≤0.5

≤0.5

≤0.3


Production process of industrial silicon:
The industrial silicon smelting is in AC electric reducing furnace, our company use the advanced technology of domestic and foreign to design furnaces, it’s with advanced and reasonable technology, it’s substantially improved the industrial silicon furnace’s power factor and equipments’ working efficiency.
The main raw material of smelting industrial silicon includes: silica, carbonaceous reducing agent. Because of the strict requirement of the aluminum, calcium and iron content in industrial silicon, so has same strict requirement for the raw material.
Requirement of raw material: SiO2 (in silica)>99.0%, Al2O3<0.3%, Fe2O3<0.15%, CaO<0.2%, MgO<0.15%, particle size is 25~80㎜.
The principle to choose carbonaceous reducing agent is: high fixed carbon, low ash specification, good chemical activity. Usually, using low-ash petroleum coke or pitch coke as reductant. But due to both of the coke have low resistivity, poor reaction ability, we have to use the charcoal (wood brick) with low ash specification, powerful resistivity and strong respond ability to replace some petroleum coke. For sintering the burden we also need use some low-ash soot.


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Q:What is the difference between industrial furnace masonry and ordinary masonry?
Industrial furnace masonry requirements are relatively high, industrial furnaces of different uses, whether material or masonry process, have strict requirements.
Q:What's the role of anchor bricks in industrial furnaces?
These layers need to be joined and anchored. Anchor brick is this role. The heat insulation layer at the horizontal section of the flue is mostly a narrow cavity.
Q:What is the difference in structure between industrial furnace and boiler?
At the same time, the working environment is relatively poor, the structure should be sturdy and durable, the transfer mechanism (generally) to stable and durable low failure rate, the insulation layer must be thick enough and the economy, the steel structure housing materials used to be enough.
Q:What is industrial furnace masonry?
Plane construction must level, slope construction must find slope,refractory bricks must be selected and processed according to masonry requirements.
Q:What is an industrial furnace pit?
Later, a chamber kiln with a semi closed or fully enclosed kiln made of refractory bricks can be used as fuel for coal, gas or oil, and electricity can be used as heat source. The workpiece will be heated in the kiln hearth.
Q:What are the combustion equipments used in industrial boilers?
The main auxiliary equipments of the general boiler are: upper coal machine, ash blower, blower, draught fan, economizer, feed pump and water treatment unit. Oil boilers are: oil pumps, burners, tanks and so on.
Q:Brief introduction to repair of industrial furnace
Although the number of industrial furnaces in general machinery plants is not large, the number of large repairs per year accounts for 16%-20% of the total number of repairs for all equipment, and the large repair costs account for about 18%-25% of the total repair cost of all equipment.
Q:Should the industrial furnace shell cool down?
The function of furnace shell is beautiful, protective lining, fixed function accessories and so on.
Q:How to use industrial furnace equipment?
When the furnace is used, the lifting mechanism of the furnace door must be in good condition, and the wire breakage of the steel wire is not allowed to exceed the designated value. The weight should be properly allocated, and the drive department shall be provided with a protective cover.
Q:Selection of heat preservation material for industrial furnace
In the neutral and oxidizing atmosphere, the tensile strength, toughness and fiber structure can be maintained for long term use. The temperature is 950-1400 centigrade. Excellent chemical stability; excellent thermal stability; excellent tensile strength; low thermal conductivity; low thermal capacity; excellent sound absorption and noise reduction performance.

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