BH-F (Engineering) Ltd - 400 Series colorant Forehearth.

Electric Forehearth
Gas Forehearth
IR Thermometer
Level Control
M.H.E.
Thermocouple
VSF Cooling

Where Installed World-Wide

Colorant Forehearth

Features:

Wide colour range to match most requirements.
Wide pull range with the 400 series forehearth cooling.
Short colour change times compared to colour change melters.
Lower energy consumption compared to small colour change melters.

Benefits:

Increased flexibility enabling a better match to customer demands.
Less machine down time due to shorter colour change times.
Reduced inventory cost because of the ability to produce smaller quantities.
Trial production runs feasible.

BH-F Colorant forehearth designed to high quality coloured glass production

The BH-F Colorant Forehearth has been designed to incorporate our
400 series forehearth technology and the proven
forehearth colouring technology of Ferro Corporation.
Ferro Corporation pioneered the
production of forehearth glass colour concentrates and
Patented the original technology.
From development, modelling and years of experience they determine
the colour concentrate type, feed rate and melting temperature
plus the melt time and mixing requirements.
The BH-F Colorant Forehearth is then designed and zoned to provide
the required heat inputs, stirrer zone and cooling capacity to
deliver glass of the correct temperature, homogeneity
and colour for the product forming process.

BH-F Colorant Forehearths have been supplied for container,
cosmetics, tableware and architectural production.
The colour range produced covers shades from pale tints to deep black.
The normal colour range produced is from clear soda lime glass,
but borosilicate and lead glasses can also be coloured
and new colours can be produced from
melter produced coloured glass.

Specific applications
Please contact BH-F to discuss the possible pull ranges
to match desired colours. Space limitations and colour
densities will limit the possible pulls.

For special and custom colours
In order to determine whether a desired colour is feasible
on a colorant forehearth and the actual concentrate required
to produce it, Ferro require a 100g sample of the
target colour and 5kg of the base glass as pieces
(not crushed cullet).

Technical Data:

Colour Range	From clear oxidising soda-lime	Blues, Greens, Browns, Purples, Pinks, Greys and Blacks.
Pull Range	416 forehearth (16" wide)	2.5 to 15tpd (2.7 to 16.5 UST/d)
xxxxx	426 forehearth (26" wide)	10 to 50tpd (11 to 55 UST/d)
xxxxx	436 forehearth (36" wide)	40 to 120tpd (44 to 132 UST/d)
xxxxx	443 forehearth (42" wide)	80 to 200tpd (88 to 220 UST/d)
Typical Zoning	Warm-up zone	Increase the glass temperature to that required to melt the colour concentrate.
xxxxx	Melt zone	Allows the concentrate to melt and diffuse into the glass.
xxxxx	Stirrer zone	Using the multiple banks of stirrers ( three or more banks) ensure an even colour distribution in the glass.
xxxxx	Cooling zone	One or more 400 series longitudinal cooling zones to condition the glass to the required temperature and homogeneity.
xxxxx	Conditioning zone	Finishes the glass conditioning and delivers the glass to the forming process.
Extent of supply	Base forehearth	Refractories (excluding channels), steelwork, combustion and cooling systems specifically designed to match customers' requirements of normal and colorant production. Existing, long, forehearths may be capable of being converted for colorant production.
xxxxx	Refractory Channels	In fusion cast material are specified as part of the base forehearth and can be supplied by BH-F if required.
xxxxx	colorant Equipment	Designed by Ferro, including feed hopper, weigh system, concentrate delivery equipment and stirrer mechanism, can be supplied.
xxxxx	Ancillary Cooling Equipment	For the concentrate feed tube and the stirrers can be supplied.
xxxxx	Bulk Handling of concentrate	Including bag emptying station, main concentrate storage hopper and bucket elevator system can be supplied.
xxxxx	Special zone exhausts	The exhausts in the colorant zones have been designed to allow the control of internal pressures and prevent any condensates falling in the glass. These can be supplied with motorised dampers to allow pressure control.
xxxxx	Heating and Cooling options	The full range of BH-F 400 series forehearth heating and cooling options are available.
xxxxx	Temperature Control	A full range of temperature control options are available, from single loop to full PLC/sCADA systems with ACS.