Waste concrete crushing equipment

Introduction to concrete crushing equipment
Currently, the waste concrete crushing equipment are fixed and mobile two categories. For the production of recycled aggregate crushing plants can be fixed natural aggregate crushing equipment. Mobile crushing and screening equipment is evolved from the original fixed, and by a combination of stand-alone devices, and can be installed on mobile devices, easy to move the host device
At present, the representative mobile concrete crushing and screening equipment has the following three types:

1. large traction mobile crusher
Install a high-performance crusher, is set for the material, crushing, screening as one of the mobile production machinery.

Although it is characterized by mobile, but it is a feeder, primary and secondary crusher, magnetic separator and screening machines as one of the broken equipment. This machine has automatic feeding system to run unattended; the largest diameter in the same machinery, bulk materials can be processed; reasonably compact body design, taking into account the noise = dust impact on the environment; automation of production Efficiency is very high, capable of producing high-quality recycled aggregate.

2. medium-sized crawler crusher
This model is equipped with feeding system, concrete crushing equipment roll crusher and efficient screening system at the job site to the main purpose of crushing.

Two-axis roll crusher is equipped with a special type of strong crushing teeth, even if mixed with reinforced concrete, can easily be broken. Also, attached to the steel drum, but also through the roller running forward and reverse simply remove the broken. Machine production efficiency, environmental protection, but only the production of recycled coarse aggregate.

3. small mobile crusher
Aircraft due to demolition sites, construction sites and other on-site mobility and good production efficiency, has been highly acclaimed. Although they are small machine, but fully equipped and fully flexible features of the minicomputer. The machine installed feeder, they are able to feed and stable production, and can set the feed rate according to the situation of raw materials; low noise, vibration, help protect the environment, even if operating in the city affect the surrounding environment do not have to worry about ; use of rubber tracks, will not damage the ground; can install two conveyor and magnetic separator.
concrete crushing equipment application
1. bulk ore (metal mining, non-metallic minerals) break-up;
2. concrete components (cement road, machine foundation, bridges and housing components) partial and full demolition operations;
3. tunnels, ditches and other indoor or confined space, split the rock excavation or demolition work:
Methodology covers rock ripper, road removal, slope treatment, and many other projects. Hydraulic splitting machine operated rescue law, in the case of blasting is not allowed, compared to "hammer" method of operation, to create a better economic efficiency: save time, save money!

Caterpillar Leaps to the Top of Mining Equipment

Wow! Caterpillar Inc. announced it will purchase Bucyrus Intl. Inc.
(BII) for $7.6 billion cash plus assumption of $1 billion of BII debt
for a total transaction price of $8.6 billion or $92 per share, a 32%
premium to the BII closing price the day before. The deal is expected to
close in mid-2011.

This year BII will have revenues of approximately $3.75, which are all
<a href="http://www.mhmhd.com/spare-parts-for-mining-industry/">mining
</a>related. Caterpillar's estimated 2010 mining related revenues are
$3.9 billion. With only one possibly redundant product category between
the two companies (electric-drive trucks, where Cat products are still
in development), it is reasonable to add revenues from both companies
totaling $7.65 billion in mining equipment sales if they were one
company today.

More than 18% of Caterpillar's revenues would be from mining, making
Caterpillar far and away the largest manufacturer of mining equipment
worldwide. Komatsu is expected to have 2010 mining equipment revenues of
$4.8 billion and BII's direct competitor, Joy Global (P&H Mining
Equipment and Joy Mining Machinery), will have 2010 revenues of
approximately $3.4 billion.

International Mining Machinery Holdings Limited Announces Shanxi JV with Shanxi Coal Transportation

HONG KONG, Dec. 8, 2010 /PRNewswire-Asia/ -- International Mining
Machinery Holdings Limited ("IMM" or "the Company"; HKEx: 1683), a
leading designer and manufacturer of underground longwall coal mining
equipment in China, is pleased to announce that IMM has entered an
agreement with Shanxi Coal Transportation and Sales Group Co., Ltd.
("Shanxi Coal Transportation") to establish a joint venture to meet the
enormous demand for coal mining machinery in the rapidly consolidating
coal mining market in Shanxi. This landmark agreement is a significant
milestone for IMM, as it lays a solid foundation to add to the Company's
already rapid growth.

According to the terms of the agreement, the two parties will set up a
joint venture (the "JV"), under the name of Shanxi Meijia Mining
Machinery Company Limited, with Shanxi Coal Transportation holding 51%
and IMM controlling the remaining 49%. IMM will be responsible for the
daily management of the joint venture. With a 50-year term, the joint
venture company will be principally engaged in the production, sale and
marketing of roadheaders and other mining machinery. The two parties
have already signed the joint venture agreement, and the planning stage
of production, sales and operations for the joint venture is in full
swing. Production is expected to start by the end of 2011.

Pursuant to the JV agreement, the registered capital of the JV company
will be RMB69 million, RMB33.81 million of which will be contributed by
the Company (through a wholly-owned subsidiary, Jiamusi Machinery) with
the remaining RMB35.19 millionfrom Shanxi Coal Transportation through a
wholly- owned subsidiary. It is expected that the JV company will invest
aboutRMB83 million as an initial investment. Initially, the JV company
will focus on the production and sale of roadheaders and will later
include shearers, armoured- face conveyors and other coal mining machinery.

Shanxi Coal Transportation is a large, modernised coal mining and
logistics group established by the Shanxi State-owned Assets Management
Committee and 11 municipal state-owned assets management committees.
Shanxi Coal Transportation is engaged in a wide variety of coal-related
businesses, including the sale of coal and coke, coal and coke
technology development, the sale of coal chemicals and the production of
coal mining machinery. Shanxi Coal Transportation is an industry leader
with strong experience in the entire supply chain of coal, from
production and sales to transportation-related logistics. Shanxi Coal
Transportation, with an annual coal sales volume of about 200 million
tons, ranked as the second largest company among China's top 100 coal
enterprises in 2009 according to China National Coal Association and is
the 85th largest of China's top 500 enterprises in 2010 according to
China Enterprise Confederation.

As a leading coal enterprise, Shanxi Coal Transportation has rich
management experience and is a significant player inShanxi's coal mining
market. Shanxi Coal Transportation owns 163 modern coal mines sharing
the same centralised planning and procurement. It is expected that
Shanxi Coal Transportation will be producing more than 100 million tons
of coal annually in 3-5 years.

Shanxi is a key coal mining province with annual coal production
reaching 615 million tons. The province has an acute demand for coal
mining machinery, making it a strategic market with vast development
potential. The central government has placed a priority on the coal mine
consolidation in Shanxi province in order to lift overall productivity,
mine safety and quality of coal produced. In the last quarter of 2009,
the monthly coal production in Shanxi reached a record volume of 61.03
million tons. As the industry consolidation continues, hundreds of small
and non-mechanised mines will be closed and replaced by much bigger and
more modern mines. These new mines will require mining machinery from
companies such as the JV company. Moreover, the central government has
given top priority to mine safety and the demand for modern coal mining
machinery will continue to rise, providing the JV company with ample
development opportunities in the Shanxi market.

Mr. Thomas H. Quinn, Chairman of IMM, said, "Shanxi Coal Transportation
is a leading coal mining enterprise and we are delighted to partner with
such an impressive organisation. Apart from having strong backing from
the Shanxi provincial government, it is leading the industry in many
ways including a wide scope of businesses and services and an
outstanding management track record. We are confident that the joint
venture will achieve outstanding results based on the leading industry
position of Shanxi Coal Transportation and the progressive and talented
management of IMM."

Mr. Kee-Kwan Allen Chan, CEO of IMM, said, "The partnership with Shanxi
Coal Transportation is mutually beneficial, and will boost IMM's
competitiveness in such a huge market. The ongoing consolidation in the
coal mining industry gives rise to huge market opportunities, which the
joint venture company will successfully exploit to expand its market
share, given its geographical advantage in Shanxi."

About International Mining Machinery Holdings Limited (IMM)

International Mining Machinery Holdings Limited is a leading designer
and manufacturer of underground longwall coal mining equipment in China.
Three of its products are roadheaders, shearers and armoured-face
conveyors. Its end customers include all of the 50 largest coal
producers in China, which collectively accounted for approximately 60%
of the total coal production inChina.

The Company has been listed on the Main Board of The Stock Exchange of
Hong Kong Limited since 10 February 2010 (stock code: 1683). On 6
September 2010, IMM became a constituent stock for the Hang Seng
Composite Index and its sub-indexes, namely the Hang Seng Composite
Industry Index -- Industrial Goods and Hang Seng Composite SmallCap Index.

What Is a Roller Mill?

Roller mills are industrial machines that are used to break down and process an assortment of ingredients and materials. Roller mills are used in a variety of industries.

Function

1. Unlike traditional windmills and grain mills, which use large stones to grind and break down ingredients into powder, industrial roller mills function by crushing and grinding materials between two large rollers. The rollers compress the materials in the same way that a steamroller would, reducing the materials to pulp and powder.

Industries

2. Roller mills have a variety of uses in an assortment of industries. The mills have traditionally been used in agricultural industries, crushing grains to create various grades of flour. The construction industry also has put the vertical roller mill to good use, using the mills to crush gravel into smaller rocks and powder for paving and construction.

Benefits

3. Apart from being able to grind the various materials faster than a traditional stone grinding mill, roller mills have the advantage of a larger surface area to apply to grinding. This larger surface area allows more material to be ground at once, which makes the process even faster.

Limestone Quarry Operations and Limestone Processing Operations

Limestone quarry processes and operations represented in the inventory
presented in this
report include:

Removal of overburden using heavy equipment
Transfer of overburden to on-site storage
Quarry operations required to remove stone from deposit including
drilling, cutting, prying,
and use of explosive charges.
On-site transport of stone using heavy equipment.
Transport of scrap stone to on-site storage
Onsite generation of energy and compressed air
Capture and treatment of wastewater
Upstream production of energy and fuels
Limestone processing processes and operations represented in this
portion of the inventory include:

Primary shaping of stone into large, less-refined pieces, such as tiles
or flagstone
Application of a surface finish or texture
Secondary shaping, including hand detailing, of stone into specific products
Packaging of finished limestone products or slabs for shipment
On-site transport of stone using heavy equipment, such as forklifts
Transport of scrap stone to on-site storage or reclamation
Onsite generation of energy and compressed air
Capture and treatment of wastewater and other waste materials such as dust
Upstream production of energy and fuels

Copper Processing

The copper processing industry refines copper from metal ores or scrap
copper. The leading consumers of copper are wire mills and brass mills,
which use the copper to produce copper wire and copper alloys,
respectively. End uses of copper include construction materials,
electronic products, and transportation equipment. Once refined, copper
can be used as a powder in automotive, aerospace, electrical and
electronics equipment, in anti-fouling compounds, various chemicals and
medical processes. Compounds of copper include fungicides, wood
preservatives, copper plating, pigments, electronic applications and
specialized chemicals.

Copper can be produced as either a primary product or as a co-product of
gold, lead, zinc or silver. It is mined in both the Northern and
Southern Hemisphere and primarily consumed in the Northern Hemisphere
with the U.S. as a primary producer and consumer.

Primary Production of Copper

Copper is mined in open pits and below ground. The ore usually contains
less than 1% copper and is often associated with sulfide minerals. The
ore is ground, concentrated, and slurried with water and chemical
reagents. Air blown through the mixture attaches to the copper, causing
it to float to the top of the slurry. The copper is then removed with a
skimmer. The tailings remain and are dewatered and disposed of in
tailing ponds. The water is recovered and recycled.

One of two processing methods are used to refine concentrated copper.
Pyrometallurgy, or smelting, is used on ore with copper sulfide and iron
sulfide minerals. The concentrate is dried and fed into a furnace. The
minerals are partially oxidized and melted, resulting in segregated
layers. The matte layer refers to the iron-copper sulfide mixture which
sinks to the bottom. The slag, which refers to the remaining impurities,
floats on top of the matte. The slag is discarded on site or sold as
railroad ballast and sand blasting grit. Sulfur dioxide gases are also
collected and made into sulfuric acid for use in hydrometallurgical
leaching (discussed below) or sold off-site.

The matte is recovered and moved to the converter, a cylindrical vessel
into which the copper is poured. Air, lime and silica are added to react
with the metal oxide. Scrap copper may also be added. Iron slag is
removed and often recycled back into the furnace. Sulfur dioxide is
captured and converted into sulfuric acid. The converted copper, known
as "blister copper," is recovered.

The blister copper then undergoes "fire refining." Air and natural gas
are blown through the copper to remove any remaining sulfur and oxygen.
The copper is cast into copper anodes and placed in an electrolytic
cell. Once charged, the pure copper collects on the cathode and is
removed as 99% pure. The copper can be sold to wire-rod mills or further
processed into rods. Anode slime refers to impurities that sink to the
bottom of the electrolytic cell.

The second method for refining copper is called the hydrometallurgical
process. This process begins with oxidized copper ores or oxidized
copper wastes. The oxidized material is leached with sulfuric acid from
the smelting process. The sulfuric acid is percolated through piles of
oxidized metal and collected with acid resistant liners.

Further refining may be performed using one of two processes. In
cementation, the acidic solution of copper is deposited on to scrap iron
in an oxidation-reduction reaction. After sufficient amounts of copper
have been plated, the copper is further refined using the
pyrometallurgical process. However, this process is rarely used.

Solvent extraction is more commonly used to refine copper. An organic
solvent in which copper is soluble is introduced. As the copper is more
soluble in the organic layer than the aqueous, it enters an
organic-copper solution and is separated. Sulfuric acid is added to
strip the copper from the organic solvent into an electrolytic solution.

In the electrolytic process, called electrowinning, the copper plates
out onto the cathode. The cathodes are sold as-is or made into rods
on-site or made into starting sheets for other electrolytic cells.

All remaining organics and acids are reused. Further, sulfur is fixed
throughout the process to meet Clean Air Act Standards. If the sulfur
content of the gas is over 4%, the sulfur compounds are made into
sulfuric acid for use in the process or for sale to fertilizer
manufacturers. Slurries with less than 4% sulfur are classified as RCRA
hazardous wastes because of sulfur, cadmium, lead and other metals.

Secondary Copper Processing

Secondary copper processing involves two steps: metal pretreatment and
smelting. Pretreatment includes cleaning and concentrating the copper.
Concentrating is done manually or mechanically and includes sorting,
stripping, shredding and magnetic separation. The metal can be further
refined using pyrometallurgical methods — including sweating, insulation
burning, or drying — or hydrometallurgical methods — including flotation
and leaching. The concentrated metal is then smelted. Generally, copper
is fire refined, similar to primary copper smelting operations although
the exact procedure depends on the quality of copper scrap.

Pollution Output and Prevention in Copper Processing

Primary and secondary copper processing produce similar pollutants with
similar pollution prevention opportunities. Air emissions include
particulates and sulfur dioxide. Particulate air emissions usually
include iron and copper oxides, but many contain other metal oxides,
sulfates or sulfuric acid. Particulates are usually captured using
emissions control equipment. Depending on the composition of the
emissions some recovery of heavy metals may be possible.

In addition, secondary copper processing produces air emissions from the
removal of excess oils and cutting fluids. The air emissions are usually
captured using baghouses. After-burners may also be used to fully
combust products.

Sulfur dioxide is usually captured using single stage electrostatic
precipitation. Once captured, the sulfur dioxide is converted into
sulfuric acid and sold or reused in process.

Liquid wastes from the copper processing plant include large quantities
of water. Most of the water can be reused with minimal refinement. The
leaching process creates some sulfuric acid liquid waste. The sulfuric
acid is almost always directly reused. Electrolytic refining procedures
also produce some liquid waste. This waste is usually sent to waste
water treatment facilities and discharged.

Bridge Work Could Impact Mill

Staff photo/Mike Burkholder: As part of the bridge replacement project,
the mill could be torn down. Ohio Department of Transportation officials
held a public meeting Wednesday to allow for public comment regarding
the building's future.

ST. MARYS — State officials Wednesday afternoon held a meeting to allow
public input regarding the future of a St. Marys staple. Representatives
from the Ohio Department of Transportation and the city of St. Marys
gave brief remarks regarding the High Street bridge project. Under the
proposed project, the city is considering the possible demolition of the
grist mill.
"What we are calling the reservoir mill, which is the grain elevator
owned by St. Marys Hardware, has been determined eligible for the
National Register," ODOT District 7 spokesperson Tricia Bishop said. "It
was an early feature on the canal and it's considered to have statewide
significance."
Bishop said part of the bridge replacement could impact the structure
because of its deteriorated status. Since the mill has been classified
as historic, Bishop said state officials wanted the public's input as to
what should or could be done to preserve the building.
"If you have concerns over the demolition of the mill, which again is
just one of the things that could happen, we hope you talk about that,"
Bishop said.
Mark Droll, of Kohli & Kaliher Associates, is part of the design team
working on the bridge project for the city. The project would replace
the bridge that runs above the Miami and Erie Canal.
"We're going to put railing on the bridge to match the railing that's on
the other one," Droll said. "It's going to be the same width going
through there and will clean up the whole section real nicely."
Droll said the bridge is showing a lot of deterioration, including
damage to its steel and beams. The bridge, Droll said, has outlived its
life.
The new, single span bridge would continue the look of Lock 13. The
project will require the removal of the old abutments, excavation and
the driving of 45-foot long pilings.
"We do have some work that comes up adjacent to the mill," Droll said.
"We would have to deal with that during construction or we'll have to
see where our work limits will go."
If the mill is not removed, Droll said there is a possibility the
structure would be severely damaged because of the construction of the
bridge.
"That building is not in the greatest of shape," Droll said. "We are
weighing those options of how to best design the bridge without
impacting the mill. But should the mill become impacted, we're going to
have to deal with the issue of can it withstand construction. That is
what is unknown at this point."
According to a report prepared before the meeting, the mill was built in
1847, two years following the completion of the Miami and Erie Canal.
The power for the mill was generated by water from the mill race — which
funneled water from the canal.
Jim Heinrich, an officer with St. Marys Hardware, said he attended the
meeting to gather information regarding the project and to examine all
possible options for the mill.
"I'm really here today to listen and to learn," Heinrich said. "I have
not taken a position yet at this time."
City Engineer Craig Moeller said the bridge was built in 1941. Moeller
also said the foundation the bridge was built on dates back to 1888.
The deck was replaced in 1983 and the railings were capped 13 years ago.
The project was initially scheduled to take place in 2012. Moeller said
the time frame has changed to 2013 or 2014.
Bishop said the public meeting was held to allow as many people as
possible the option of speaking up regarding the project.
She encouraged residents who were unable to attend the meeting to go to
www.dot.state.oh.us/districts/D07/PlanningandPrograms/Pages/PID83122.aspx,
where forms can be filled out and mailed electronically.
"We're going to move forward and determine what is actually needed to
build the project," Bishop said.
"If we have no involvement in that building and the building can just
stand, then we won't be harming a historic resource and we'll just move
forward and the building can just continue to stand there and continue
to deteriorate the way it already is. If we have to get into the
building, then we'll move forward with the assumption that we're going
to harm the building, we'll bring our consulting parties together to try
and identify mechanisms to mitigate the harm. Things like a recordation
of the building, aesthetic treatments in the vicinity of the project —
that kind of thing."

source: http://www.theeveningleader.com/content/view/272662/1/