Silicochromium Furnace

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Silicochromium Furnace

Brief introduction and main application of silicochromium alloy
More than 90% silicochromium alloy is used as reducing agent in melting medium carbon ferrochromium, low-carbon ferrochromium and micro-carbon ferrochrome in electro-silicothermic process. In addition, silicochromium alloy can also be used as deoxidier and alloying agent in steelmaking. With the development of oxygen steelmaking, it has been increasingly wide applied to deoxidizing out chrome in steel slag and in additional part with silicon chromium alloy.
Silicochromium alloy properties

Silicochromium alloy is chromium and iron silicide, a kind of ferrochrome which contains enough silicon. Chromium silicide is more stable than carbide, so when silicon content in Fe - Cr - Si alloy is increasing, carbon content decline.

Silicochromium Furnace

Silicochromium alloy – Grade & Chemical composition

Grade	Chemical composition %
	Si	CR	C	P		S
	Si	CR	C	Ⅰ	Ⅱ	S
	≥			≤
FeCr30Si40-A	40	30	0.02	0.02	0.04	0.01
FeCr30Si40-B	40	30	0.04	0.02	0.04	0.01
FeCr30Si40-C	42	30	0.06	0.02	0.04	0.01
FeCr30Si40-D	42	30	0.10	0.02	0.04	0.01
FeCr32Si35	35	32	1.00	0.02	0.04	0.01

Smelting process
There are two kinds of methods in smelting silicochromium---one-step method and two-step method. One-step method is also called slag method, two-step method is also called no-slag method. One-step is smelting Silicochromium by putting chrome ore, silica and coke into one furnace. The first step of two-step method is putting chrome ore and coke into the first furnace to produce high carbon ferrochrome, and in second step to put the crushed high carbon ferrochrome, silica, coke together into another furnace. At present, in china industrial production, mostly use the two-step method to smelt silicochromium alloy.

Q: What is the difference between industrial furnaces and boilers?: A boiler is a mechanical device for heating water into hot water or steam by the use of heat from fuel or other sources of energy. The original meaning of a pot is a water container heated by fire. The furnace is the place where the fuel is burned. The boiler includes two parts, the cooker and the furnace.

Q: Should the industrial furnace shell cool down?: If the furnace shell temperature is too high, it shows that the lining is not good or damaged, so it should be repaired in time. If you do not repair, take the cooling way, undesirable. Because this will cause a lot of heat loss, resulting in waste of energy, increase production costs, and affect the service life of the furnace.

Q: What are the companies in the world that are currently engaged in metallurgical furnaces?: There are many kinds of furnaces in metallurgical industry,colored and black,smelting and heat treatment are also included.

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: What is industrial furnace masonry?: Masonry industrial furnaces refers to complete materials such as brick kilns in construction process.

Q: What's the role of anchor bricks in industrial furnaces?: The wall of an industrial furnace or flue is mainly composed of an inner lining layer, a heat insulating layer and an outer wall layer. The lining is a refractory brick, and the outer wall is an ordinary sintered brick.

Q: How many kinds of industrial electric furnaces are there?: Industrial furnace according to the heating mode is divided into two categories: one is the fuel furnace, combustion heat with solid, liquid or gaseous fuel in the furnace for heating the workpiece; the second is in the furnace, the furnace converts electrical energy to heat the heat.

Q: What are the advantages of a vacuum furnace?: Energy consumption is lower than salt bath furnace. Modern advanced vacuum industrial furnace heating chamber is made of high quality heat insulation material and wall, which can concentrate electric heating energy into heating chamber with remarkable energy saving effect.

Q: How to use industrial furnace equipment?: If it is water cooling furnace door, but also to ensure the smooth flow of pipes, winter pipes are not frozen. When the boiler is in a limited position, the interlocking device for cutting off the power supply shall be provided when the furnace is in and out, and the number of broken wires in the pitch of the steel wire shall not exceed 10%, and the counterweight of the furnace door shall be reliably hung.

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.

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