News

Electric melting and composite die (bushing) to produce basalt continuous fiber.

Our company has developed platinum-free dies for Continuous Basalt Faber (CBF) with several quantity of holes from 200 to 600 and conducted their comprehensive tests.

Equipment designed to implement our technology consists of:

• Loading device for primary basalt fraction from 0 to 8 mm without any pre-processing (washing, sorting, etc.)
• Induction melting furnace with a specified temperature profile in four zones
• InLine mixer (a new one!)
• Electric feeder for 10 outlets
• 10 composite spinneret feeders (bushings)

As a result, a highly stable process to produce CBF has been developed, which includes high-speed induction melting of basalt, high-temperature heat treatment and low-temperature “casting” of filaments. The process makes it possible to improve the quality of basalt threads across the entire range of their diameters, line productivity by an average of 15%, and eliminate thread breakage during drawing.

Economic and operational characteristics of the above equipment set:

• Energy consumption per 1 ton of fiber                                                     820 kWh
• Die output at 608 holes                                                                             >30 kg/h
• The test period for the composite die was                                                90 days of continuous operation, the die (bushing) remained fully functional
• The diameter of the resulting fibers                                                           9-16 µ, – depends on the drawing speed
• Price ratio compared to PtRh die (bushing)                                               1/15

During the tests there was not a single breakage of the drawn threads.

Works to increase performance of equipment  will are continues.