Uses of Ferrous Sulphide

• Ferrous Sulphide sticks are widely used as a laboratory chemical for the preparation of Hydrogen Sulphide gas, by famous KIPP'S apparatus when comes in contact with dilute mineral acids.
  
  
• The Production Of Grey Iron-
  In foundries, during electric melting, residual sulphur level decreases due to cleaner melting practices and the use of low sulphur steel scrap. It is found that iron does not readily respond to inoculants if Sulphur is below 0.04%. Then it is necessary to resulphurize by using Ferrous Sulphide to hold the level in 0.05% to 0.12% range.
  
  
• In Alloy And Stainless Steel Industries To Control Hydrogen Embrittlement It is very convenient and economic to use Ferrous Sulphide for resulphurization in these steels to hold the right level of 'S' and ensuring not to drop 'S' level below 0.015% as these steels carry a minimum sulphur specification.
  
  
• Production Of Free Cutting Steels
  Ferrous Sulphide is used as a resulphurizing agent in the production of carbon, alloy and stainless types of free cutting steels.It acts as an alloying agent to improve machinability of steel castings which are used to manufacture various steel components. The range used is between 0.15 to 0.30 'S' contents. The 'S' contents in plain carbon steel is 0.05 max.
  
  
• In Electric Furnaces For Production Of Malleable Iron
  Sulphur in form of Ferrous Sulphide is added along with FeSi & FeMn to increase the 'S' contents of electrically melted iron.Addition of FeS influences white iron formation and obtain 'S' contents approximately 0.15%
  
  
• The Purification Of Crude Phosphoric Acid Ferrous Sulphide is used in cake form as a reducing agent to remove heavy metal impurities from phosphoric acid.

Safety (MSDS) Data For FeS

General

CHEMICAL FORMULA	FES
CLASS	SULPHIDE
GROUP	SULPHIDE
SYNONUMS	IRON SULPHIDE FERRO SULPHIDE

Physical Properties

COLOUR	GREYISH BLACK
APPEARANCE	CRYSTALINE SOLID
MELTING POINT	1194 C
BOILING POINT	DECOMPOSES
DENSITY	4.84
SHAPE	LUMPS/ STICKS/ POWDER
SIZE (Mesh)	AS PER REQUIREMENT
STABILITY	STABLE COMPOUND

Chemical Properties
Soluble in mineral acids and produces hydrogen sulphide gas.

Derivation:
Derived By Chemical Reaction Of Iron And Sulphur

Toxicology : Non-Hazardous

Personal Protection: Do Not Breathe Dust

Why to Use Ferrous Sulphide?
Elemental Sulphur has very low melting point and its tendency to float on the surface of molten metal results the release of Sulphur di Oxide, an undesirable gas which pollutes the working environment. Moreover, low melting eutectic brittle compounds form along the grain boundaries and mechanical properties are deteriorated.