Fly ash storage solutions
Several improvements from previous ash storage domes were incorporated into two
Separation Technologies LLC projects. In addition local conditions required elevating
the dome storage to protect from potential fooding, simplified piping installation
by using a through-the-dome access tunnel, and an allowance for large settlements.
Why a dome was the optimum solution for Carmelo
The decision to opt for a dome over other potential storage solutions was taken
because of its rapid construction, structural integrity, and cost and space efficiency.
A further advantage of the dome is its ability to withstand hurricane force winds.
Massive dividing walls in fertilizer storage domes increase utility in Turkey
The dividing wall's distinctive zigzag configuration ensures lateral support of
asymmetrical loads, including extreme conditions when half the dome may be full
and the other half empty.
Concrete arch tunnels: An innovative technology
This article will focus on the advantages of this new 'inflated' concrete arch tunnel
and the technology used to develop it.
Russia in need of more storage facilities
Following the disintegration of the USSR in 1991, Russia lost direct access to Baltic
States Ports. Russia was left with 40 ports with an estimated handling capacity
of 133mt a year. According to conservative estimates, the country needs at least
200,000 capacity to service its growing economy.
Dome Technology's domes improve the Port of Wilmington
At the Port of Wilmington, construction is complete. It is capable of housing up
to 62,000 tons of wheat at a time with a total volume of 2.5 million cubic feet.
Its five separate compartments each will have loading hatches in the roof, as well
as a reclaim conveyor in the floor.
Overview of a Monolithic Dome
They are called Monolithic Domes and, as the name implies, they are circular, one-piece,
steel-reinforced concrete structures that offer a number of advantages over more
traditional bulk storage building designs. Here's a quick overview:
- Less costly to construct the silos
- More self-unloading than flat storage
- Simple foundation requirements
- Automated reclaim is easy to install and economical to operate
- Superior insulation qualities
- Condensation is virtually eliminated
- Maximum waterproofing
- Structures are adaptable for multiple use
Dome Technology improving its Domes
The hemisphere gives you the most volume for the least amount of surface area, explains
Thomas W. Hedrick of Dome Technology. For many years, Dome Technology has constructed
an average of 30 domes per year. Without knowing more, one would expect the company
to just keep on building 30 domes per year, the same way it has in the past. However,
the company's mechanical systems designers and engineers are constantly finding
ways to improve the concept, resulting in better ways to build domes. In this article,
we review how new design innovations are affecting the evolution of dome construction.
Reclaim advances and domes team up
Thin-shell concrete dome structures are becoming more popular as a method for storing
bulk materials. New technological advances in mechanical and pneumatic reclaim systems
by various manufacturers have made dome storage an economical storage solution for
cement, fly ash and a host of other products.
The Domes shape allows for heavy top loading
The dome's inherent strength allows heavy loads to be placed on the dome's apex
without internal supports. A dome storage facility recently completed in Canada
has conveyor and head house loads resting on its apex weighing almost 1 million
Costs and options to reclaim cement from domes
This article outlines capital costs and operating considerations, the author's clients
consider to be important when selecting a particular type of storage to construct,
and the options available for the reclaim of cement from domes. Read More.
Dome clinker storage vs. conventional silo
A detailed evaluation was carried out to compare the dome clinker silo with a normal
conventional concrete silo. From the technical perspective both technologies are
worth considering and are equally good. However, it was decided to construct a concrete
dome clinker silo with a storage capacity of 110,000t.
North Texas Cement terminal facility
North Texas Cement is building a large cement import terminal facility located on
the Port of Houston as part of a large expansion effort. The company specializes
in packing and handling transporting, distributing and now the importing of cement.
Benefits of domes for bulk storage
Domes are a popular storage option in the bulk storage industry. They vary in design
from simple dome structures with low profiles, to domes with hemispherical shape,
or dome silos. The dome is generally less costly than silos; additionally, automated
retrieval is simpler and more cost effective compared to flat storage. Foundation
requirements are generally simple and the dome can be erected swiftly, regardless
of weather. The structure is strong, durable, insulated, offers maximum waterproofing
and is not prone to condensation. The dome's ability to accommodate a variety of
products makes it very popular.
Weathering the storm with Monolithic Domes
The Monolithic Domes, installed at the Equalizer facility in the Port of Victoria
in Texas, survived Hurricane Claudette intact, with only minor blemishes on the
Separation Technologies opens ash dome on Ash Wednesday
Dome Technology was selected to construct the dome to be used as part of Separation
Technologies' three part ash management solution for Constellation Energy's Brandon
Shores plant in Maryland, USA.
Construction Cal. Portland Cement's Terminal
Given at the Intercem Americas conference in Miami, USA, this presentation outlines
all stages of the construction of California Portland Cement Company's (CPCC) new
import and distribution terminal. It tracks the various stages of construction and
the cooperation required between companies in terms of design, fabrication and erection
of this state-of-the-art terminal.
GLP highlights of 5 gypsum projects
Discovering economical solutions to store gypsum is always a concern. In the past
couple of years, the gypsum industry has been turning to dome silos as an economical
alternative to store bulk gypsum.
The role of dome storage at cement terminals
Terminals and manufacturing plants seem to be ideal locations for the dome. Domes
are so well suited for terminals because ships can minimize dock time by unloading
quickly. The same applies to loading ships to export cement. Read More.
Ecologica Carmelo Dome in Puerto Rico
The Ecologica Carmelo dome is the first dome of its kind built on the island for
industrial purposes. A dome was selected over other types of storage systems because
of its rapid construction, greater structural integrity and higher cost-efficiency
compared to other construction techniques. The most efficient use of space was achieved
with the concrete dome. With a diameter of 50.6m and 28.9m in height, the dome has
a storage capacity of 34,000 cubic meters. In addition, a dome provides the most
efficient structural system to withstand hurricane force winds. The construction
of the dome from inflation stage to finished shell took only 42 working days.
Two primary reclaim systems for domes
Over the past 10 years a variety of reclaim systems have been used to retrieve fly
ash from thin shell concrete domes. This article provides an overview of the two
primary types of reclaim systems used in domes: mechanical and fluidized floor systems
with their variation. It also explores other dome reclaim options that show promise
for future applications. Reclaim systems used for fly ash have also been successfully
used to reclaim cement.
Ash Grove Cement Plant in Louisville, NE
The most cost effective storage option was to add a 90,000 ton concrete storage
dome provided by Dome Technology. Other equipment selected by Penta included a Cambelt
reclaimer, a Fuller Bulk Handling FK pump and Aerzen compressor to pneumatically
convey 200 stph of cement, 650 ft horizontally and 170 ft vertically, to six truck
load out silos.
Gulf Cement Co. utilizes domes for bulk storage
Gulf Cement Co. (GCC) was established in the Emirate of Ras Al Khaimah as a public
shareholding company (PSC) by an amiri decree issued by His Highness Shaikh Sagar
Bin Muhamed Al Qassimi, the ruler of Ras AL Khaimah, in 1977. The company commenced
production in early 1982, with a capacity of 1 million tpa of cement. In 1998, production
was enhanced to 1.25 million tpa by modifying the existing plant. Now the company
produces ordinary Portland cement, sulfate resistant cement, moderate sulfate resistant
cement and blast furnace slag cement.
Changing terminal arrangements to gain capacity
This article investigates the cost of changing typical terminal arrangements in
order to gain capacity. A single steel bin terminal arrangement is included along
with a capacity gain by using two steel bins. A warehouse dome arrangement is included
where the project cost is evaluated by changing the size of the dome. The total
project costs are tabulated in order to directly compare the effect of these choices.
Phoenix Cement's new Clarkdale plant
In order for the plant to remain competitive, the firm saw a need for a major upgrade
in production capacity and more efficient equipment technology. The result was virtually
a new plant, from vertical raw and finish mills to a single five-stage preheater-precalciner
kiln system that replaces three older units. The project began in Spring 2001 and
took about 18 months to complete, although some details still are being fine-tuned.
Concrete Construction, February 2003
Schools are all about learning, and a number of school districts are getting educated
about a type of concrete building that is proving to have distinct advantages over