LINERS AND WEAR RESISTANCE_proof 23/08/2016 15:32 Page 4
LINERS AND WEAR RESISTANCE
have become common
place in order to protect
chutes, hoppers and
pipework. Solvent free
and cold curing, these
linings can be applied in
situ without the need of
specialist tools, which
allows for safe and easy
applications in confined
spaces.”
Kalenborn Abresist
has introduced KALFIX®,
Niclas Wechselberger, Technology and
Development Manager at Combi Wear Parts.
Lining pipes and more
Belzona notes that chutes and hoppers are
amongst the most heavily threatened pieces of
equipment in the industry. “Much like conveyor
belts, solid handling equipment is exposed to
extensive erosion and abrasion from excavated
materials of varying sizes. Not only that, but the
impact, trajectory and volume with which some of
the material is transported through the chutes
and hoppers can have detrimental effects on
their structure. This can often leave equipment
affected by cracks, holes and wall thickness loss
as a result of the intense abrasion, erosion,
corrosion and impact.
Hoppers can develop holes due to abrasion
and impact, and metal plates can b e cold bonded
over holed areas. Abrasion resistant linings can
help protect chutes and hoppers and extend their
service life.
In terms of the repairs available for these
types of equipment, they are two-fold, says
Belzona, namely protection and prevention.
“Initially, in order to return chutes and hoppers
and other such apparatus back to service, it is
necessary to fix holes and cracks. Historically,
this has been done using hot-work to weld metal
plates into place over the defect; however, this is
being matched by the advent of cold-bonding
practices which allow metal plates to be bonded
onto the equipment using cold-curing, polymeric
materials. Once the repair has been completed,
providing protection of the main impact zones is
crucial to preventing further damage. This can be
achieved by an array of sacrificial barriers or
linings, which help to absorb impact and
abrasion from the mining materials. More
recently, ceramic-filled abrasion resistant linings
Trelleborg’s hoses are manufactured using
superior rubber composition to deliver high
quality and improved longevity. They are all
fully tested and meet inspection requirements
throughout the world
128 International Mining | SEPTEMBER 2016
a line of adhesives for
pipeline coatings.
KALFIX 911 and KALFIX
913 are pressure transfer fillers for repairing high
pressure pipelines and offer extreme adhesion,
even to underwater surfaces. KALFIX 563, for
pipeline coating or cold weather use, is an epoxy
and curing agent that is able to displace water
for a permanent bond to all substrates with
minimal substrate preparation. KALFIX 206 is a
combination liquid epoxy resin and a special
high temperature curing agent. Though it has a
high heat distortion, it cures to a hard and dustfree condition at normal temperatures.
Trelleborg’s engineered products operation is
now manufacturing a unique, pre-bend rubber
dredging hose in China. For the first time,
Chinese dredging and mining operations will be
able to take advantage of the superior wear
resistance and flexibility that Trelleborg’s rubber
dredging hoses provide, compared to their steel
equivalents.
All of Trelleborg’s pre-bend rubber dredging
hoses manufactured in China will be reinforced
with armoured rings. This unique design
enhancement significantly strengthens the hose,
extending life by up to five times compared to
similar products, and is currently exclusive to
Trelleborg’s Chinese manufacturing operation. It
is also the only pre-bend rubber dredging hose
available in China.
Eddy Chen, Head of Asia Infrastructure Sales
for Trelleborg’s engineered products operations,
said: “New extraction projects are emerging in
China that require new types of hoses capable of
withstanding more extreme working conditions.
We have applied our pioneering engineering
expertise to create a superior rubber dredging
hose that is reinforced with armoured rings to
deliver a higher level of wear. Even when
pumping highly abrasive media, this product
guarantees a longer lifetime.”
The hose is based on an existing rubber
dredging hose manufactured in Europe, but has
been redesigned to incorporate armoured rings
and ceramic block that improve the hose’s
longevity and reliability. Capable of transporting
tough materials such as caprock, coral or other
edged materials, the pre-shaped rubber bend can
be used in a range of suction and discharge
applications in various diameters and radii,
including dredging pumps for abrasive slurries
and loading line gravel dredgers.
“Today’s mining industry is looking for
innovative solutions that not only help optimise
operations and maximise production, but also
reduce operational costs and improve safety,”
said Rick Bucher, Executive Vice President of
Technology and Development for Victaulic.
“Continually evolving to meet the needs of our
customers and the demands of the industry,
Victaulic has developed a number of innovative
pipe-joining solutions designed for reliable,
worry-free service under the most severe
conditions imaginable while keeping pace with
today’s technology.”
Among Victualic’s extensive line of piping
solutions, to be showcased at MINExpo are the
Series 795 Knife Gate Valve and Refuse-toFuse™ HDPE pipeline system. The Series 795
Knife Gate Valve is reported to be “the