SERVICE
LIGHT LIFTING
INDUSTRIAL CRANES
PROCESS CRANES
PORT CRANES
LIFT TRUCKS
Rayong Plant
SIAM YAMATO, THAILAND
Rayong Plant
SIAM YAMATO, THAILAND
Background
One of the world’s most advanced steel recycling
minimills goes into production in Thailand this
year equipped with some of the global Konecranes group’s most sophisticated lifting technology
for reliability, energy efficiency and safety.
Siam Yamato Steel Co Ltd’s new semi-continuous
medium section mill at Rayong, uses the Konecranes technology to service equipment including
electric arc furnace, a ladle furnace and a combination continuous caster supplied by Concast,
which jointly planed the mill with SMS Meer.The
mini-mill will initially produce beams, channels
and angles used by industries such as building
and construction, offshore production and civil
engineering..
as well as the level of after-sales service provided the best value, the right price and the
by the local Konecranes maintenance team over
right team. Konecranes’ technology is
the time since.
very good for safety, reliability and the
environment, but what is important to
While the new larger cranes will share the same
us also is their local team behind the
successful basic design, all 10 of the new
technology.”
The technology built into the minimill is desiKonecranes supplied to the mill employ the latest
gned to provide efficient and environmentally
technology drawn from Konecranes’ decades of
Konecranes supplied a 220-tonne charharmonious production and delivery reliability for experience working in steel and hazardous metal ging crane, a 220 ton ladle crane, an
customers in competitive markets demanding
industry environments where temperatures at
80 ton casting crane, two 35 ton bloom
time and cost-efficiency. The minimill’s electric arc the workface can exceed +65 deg C. All the new
handling cranes, a 25-ton machinery
furnace is equipped with the latest generation of cranes feature built-in safety and failsafe reduncrane and four CXT service cranes. The
ConSo oxygen technique to reduce the electrical
dancy mechanisms to help prevent worker injuries larger cranes included:
energy consumption and simultaneously increase and materials handling accidents and to ensure
productivity. The dedusting system for the whole
the high standards of continuity of supply and
1) Charging Crane: LV Trolley 220T
steelworks is designed to meet high standards of avoidance of downtime.
Main hoist / 60T Auxiliary Hoist + 25T
air pollution control. The largest 220-ton and 80CXT7042 Monorail Hoist
ton Konecranes installed at the site employ the
“This mini steelworks is the most modern plant
2) Ladle Handling Crane: LV Trolley
latest DYNAREG energy recycling technology which for the production of medium sections and encom- 220T Main hoist / 60T Auxiliary Hoist
uses network regenerative units to feed clean
passes the latest equipment and technologies.
+ 10T CXT6041 Monorail Hoist
energy back into the power supply.
The demands of the local environmental authori3) Casting Crane: LV Trolley 80T Main
ties are fully satisfied,” says Siam Yamato Steel’s Hoist / 30T Auxiliary Hoist
The order for Konecranes latest technology follo- Chief Engineer and Assistant Project Manager
Feature: 2 unit redundant DYNAREG,
wed Siam Yamato’s long experience and high level for the new mill; Mr Piya Chairat. “The mill has
Electrical room with redundant Air-con.
of satisfaction at Rayong with the 200T cranes
been built up to a standard, not down to a price.
provided for the existing mill in 1994,
We never buy the cheapest – but we always seek
Rayong Plant
SIAM YAMATO, THAILAND
All main machinery and certain critical
functions within it have built-in operational
redundancy to continue at least limited
crane operation in emergencies and to
help avoid dangerous situations.
The power supply of these cranes incorporated three DYNAREG units to provide full
redundancy features for the crane power
supply control system. Hoisting technology in the larger cranes includes two hoisting motors mechanically coupled through
the differential gears to provide redundancy features in the hoisting. Hoisting motor
driving controls are also independently
controlled with separate inverter units for
redundancy.
Long and cross-travelling functions are
governed by two sets of independently
controlled driving units. All driving control
units are housed in an electrical room on
the crane equipped with two air conditioning units, providing further redundancy
features for safety and reliability.
“Redundancy featuring is vital to safety
and reliability in harsh environments, says
Ng Yong Hwee, Konecranes Assistant
Project Manager , Heavy Duty Cranes. “It
means the mill operation will not be affected if there is a single point of failure on
the crane, because recovery is simply
achieved through a switch in the control
selections.
“We also believe that safe and comfortable workers are efficient workers so
we have focused on providing clean and
thoughtful design with good working space
and unhindered access for maintenance
of crane components. Handrails, for
example, are carefully designed to provide
maximum protection to the operation
staff. Careful consideration extends down
to the design of the floodlights to allow
easy maintenance in the hash steel mill
environment. Because of the low visibility
of the working environment, the crane is
equipped with a positioning system to
allow effective operation even in a situation of the lowest visibility for the operator.
“The touch screen display (DYNAMonitor)
in the cabin provides the crane operator
with the operational and health status
of the crane and it greatly reduces the
time required from maintenance staff as
any faults will be displayed in this panel.
Radio remote controls are provided for
backup.
“Safety is a key issue for the charging, ladle
and larger cranes so they are amply equipped
with redundancy features together with load
precise control using modern automation
technology help guide the operator in precise
placement and safe transport of the load along
its path.
“Temperatures around these cranes often
exceed +65°C because of the heat emitting
from the furnace. The cranes themselves are
shielded from the flames and are designed to
operate in high ambient heat as well as the
brief, intense heat of the charge itself.
“Because of a higher risk level with cranes
such as the ladle cranes, special safety features are designed for cranes that transport
molten metal. The main hoist mechanism includes four independent rope reevings, double
service brakes on primary shafts, and backup
brake acting on the rope drum. Rope equalizer
beams are provided with a dampening unit to
slow down equalizer beam tilting in case of
wire rope failure. An upper emergency stop
limit switch is also used in the main hoist.
In addition to this overload protection, the
‘emergency stop’ system bypassed from PLC,
derailment supports, main hoist overspeed supervision, and end limit switches are automatically standard features of the equipment.
“Konecranes’ goal is zero unplanned downtime
of these critical cranes, and we partner with
our customers to develop maintenance-friendly
features.”
Bloom handling and smaller cranes
Siam Yamato’s two bloom handling cranes
include an LV Trolley 35 Ton main hoist and 10
Ton CXT5041 monorail hoist. Like the larger
cranes, and the 25-tonne maintenance crane,
they are equipped with comfortable air conditioned FH240 cabins, touch screen control
panels (DYNAMonitor System) and are PLC
controlled.
Fitted with magnets, they feature 30-minute full
load holding backup power supply in the event
of power failure. The braking system allows
manual lowering of load in an emergency.
The 25 Ton Maintenance Crane (25T SM0708
Main Hoist / 5T CXT5022 Auxiliary Hoist)
client’s
logo system
here and radio
features anPlace
anti sway
control
remote control as backup.
For more information, please contact
Mr Steve Gagnuss, General Manager,
Konecranes Pte Ltd, No 73 Tech Park Crescent, Singapore 638071, steve.gagnuss@
konecranes.com, 65 – 6861 2233, fax 65
– 6861 2903, www.konecranes.com
The Siam Yamato mill also incorporates
four CXT hoists, three of which are 16 Ton
CXT6041 types and one 5 Ton CXT5021.
CXT cranes have excellent hook approaches
at both ends of the crane and the headroom
requirement is minimal. CXT cranes are
designed to eliminate unused or not fully
used square meters because the crane can
operate closer to the walls and lift the load
higher.
Inverter controls deliver smooth starts, acceleration and deceleration, which minimises
load swing and enables fast and accurate
load positioning. Konecranes Dynafamily
inverter controls and pole changing controls
are standard options for crane and trolley
travelling on CXT cranes. Smooth starts and
stops also reduce wear and mechanical
stresses on crane and building structures.
Two-speed hoisting is standard on CXT
cranes.
Rayong plant
Siam Yamato Chief Engineer Piya Chairat
says the outstanding production and lifting
technology is complemented at Rayong by
excellent technical backup to ensure continuity of production and supply.
“Konecranes have been on site for 15 or
16 years here at the existing mill and they
are very, very responsive when we need
assistance. This is important when you are
dealing with safety and reliability – and when
you are sending orders out to competitive
markets in Asia, Oceania and the Middle
East.
“Konecranes have a good office in Thailand
where we can contact them to get support
quickly and this is important when doing
business in this country. And their people are outstanding - some of them have
become part of our family on site. When one
of their outstanding representatives retired
recently after 15 years, we told them they
were going to have to have to make another
one just like him to replace him.
“We are very comfortable with the people
they send us – and you have to feel comfortable with the people you are working with.
This is very important. Konecranes aims
for excellence in applying global resources
to local needs, which is what suits us. We
like to know that when we have a technical
problem, we can get support quickly from
people we know and who know us and our
plant. The people are the key to an enduring
relationship.”
Media Release – Konecranes – July 2009