Recovery of Tin Metal from Tin Sludge of Electrolytic Tinplating Industry

Type of Technology

Indigenous

Area of Technology

Materials and Materials Science / Waste Management

Brief Description

The process is simple, low capital intensive and can easily be adopted in a small scale sector. The sludge is first roasted to drive off moisture and organic compounds. The roasted product is smelted in presence of reductant and flux. The metal obtained is further refined. The overall recovery of tin is 90% with purity of 99.5%. The process is economical provided regular supply of sludge is assured.

Major raw materials

• Tin Sludge (Avg. 40-45% tin),
• Limestone,
• Coke/charcoal and
• Silica

Major Plant Equipment/Machinery

• Roasting and smelting furnaces,
• Pelletiser and
• Refining kettle and other melting accessories

Area of Application

Minerals, Metals and Materials

Applications

In production of tinplate for tin-can manufacture, solder, bronze, pewter, collapsible tubes and many other non-ferrous alloys

Status of Specific Development

100 kg/batch of sludge

Technology Transfer Assistance Offered

Includes

• Process know-how
• Details of the equipment
• Plant lay-out
• Quality assurance methods. Assistance in setting up the plant and separate terms

Additional Information

A plant with capacity to treat 10-20 tonnes sludge/annum costs approximately 15 Lakhs

For further information please contact

Director
National Metallurgical Laboratory
Jamshedpur-831 007, India