Mobile Jaw Crusher Plant

Mobile Jaw Crusher plant provides a new field of business opportunities for contractors, quarry operators, recycling and mining applications. It offers high efficient and low cost project plan without environment limit for the client.

Detailed information of Mobile Jaw Crusher Plant

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Mobile Multi-crushing Series Plant 

China, Russia issue joint communique on co-op (reprint)

MOSCOW, Oct. 28 (Xinhua) — China and Russia issued a joint communique here Tuesday, pledging further efforts to strengthen strategic coordination and deepen cooperation in various fields.

    The communique was signed by visiting Chinese Premier Wen Jiabao and his Russian counterpart Vladimir Putin at the 13th regular prime ministers’ talks between the two countries.

Chinese Premier Wen Jiabao (2nd L) and Russian Prime Minister Vladimir Putin (2nd R) sign a joint communique on the 13th regular meeting between Chinese and Russian prime ministers in Moscow, capital of Russia, Oct. 28, 2008. Wen Jiabao and Putin held talks here Tuesday at the 13th regular meeting between Chinese and Russian prime ministers. (Xinhua Photo)more…

Strong quake hits Pakistan, at least 100 killed (reprint)

QUETTA, Pakistan – A strong earthquake struck villages in southwestern Pakistan before dawn Wednesday, killing at least 100 people, injuring scores more and destroying hundreds of homes, officials said.

Congo rebels declare cease-fire to prevent panic (reprint)

UNITED NATIONS (CNN) — Rebel forces have declared a cease-fire after four days of fighting in the North Kivu province of eastern Congo, the French ambassador to the United Nations said after Security Council talks on the unfolding humanitarian crisis. more…

Congolese soldiers and displaced civilians move into Goma on Wednesday, fleeing advancing rebels.

Car bomb explodes in Spanish university city (reprint)

MADRID, Spain (CNN) — A car bomb exploded Thursday in an open-air parking lot at the University of Navarra in Pamplona, Spain, slightly injuring at least four people, authorities told CNN+, CNN’s sister network in Spain. more…

China launches telecom satellite for Venezuela (reprint)

XICHANG, Sichuan Province, Oct. 30 (Xinhua) — China successfully sent a Venezuelan telecommunication satellite into space on the early morning of Thursday.

It is China’s first contract of manufacture and launching service for a Latin American country.

A Long March 3II rocket carrying a Venezuelan  telecommunication satellite blasts off from  the launch pad at the Xichang Satellite Launch Center, southwest China’s Sichuan Province,  Oct. 30, 2008. China successfully sent a  Venezuelan telecommunication satellite into  space on the early morning of Thursday. It is  China’s first contract of manufacture and  launching service for a Latin American  country.(Xinhua Photo)

Carried by a Long March 3II rocket, the satellite was launched from the Xichang Satellite Launch Center located in southwest China’s Sichuan Province. more…

Over 8,500 Congolese flee fighting, cross to Uganda (reprint)

A boy stands outside the refugee camps near Goma, the provincial capital of the eastern province of North Kivu, Democratic Republic of Congo, Oct. 31, 2008. (Xinhua/AFP Photo)

    KAMPALA, Oct. 31 (Xinhua) — Over 600 Congolese crossed into Uganda on Friday morning fleeing fighting in eastern Democratic Republic of Congo (DRC), the United Nations High Commissioner for Refugees (UNHCR) has said.

    The UN refugee agency said in a statement issued here that the total number has now reached 8,500 refugees who have fled fighting between rebels loyal to renegade commander Laurent Nkunda and the Congolese army in the last three months. more>>>

Bauma China 2008

 
Bigger Business in Asia
 
The construction-machinery sectors in China and all of eastern Asia are still experiencing double-digit growth rates. As the boom in the construction industry continues, these countries with the largest populations in the world have excellent prospects for the future.

The largest and most important industry platform for this rapidly growing region is bauma China in Shanghai, which will open its gates for the fourth time from 25 – 28 November 2008. bauma China allows manufacturers to showcase their products in a professional setting, acquire new customers and make optimum use of business opportunities.

bauma China celebrated its premiere in 2002, and established itself as a key event in Asia from the very beginning. In 2006, more than 80,000 competent Chinese and international trade visitors came to the Shanghai New International Expo Centre to gather information about technological innovations for the construction industry and explore business.

VSI5X series Vertical Shaft Impact Crusher

VSI5X series vertical shaft impact crusher is a new generation high effective product which introduces German technology, and owns many independent patents property. It integrates three crushing methods into one. All of these made it the core equipment in sand making industries. It is widely used in a variety of metals and non-metallic minerals, cement, refractories, abrasives, glass raw materials, construction aggregate, sand, metallurgical and other industries. Applicable for medium and fine crushing of various ores and rocks, such as iron ore, non-ferrous metal ore, corundum, bauxite, quartz sand, corundum, perlite, basalt materials.

VSI5X series vertical shaft Impact Crusher Feature:

1, deep cavity-type rotor design is optimized to increase material pass-through volume by 30%.
2, when wear shield partial wear out, put upside down, material utilization improved, and service life increase more than 48%.
3, modular-design hammer, just to replace worn parts when wear out, it can reduce cost more than 30%. Add vice hammer, which effectively prevent damage to stand plate after wear out.
4, the core abrasion-resistant material is high degree wear-resistant and temperature-resistant material which used in American important industries.
5, diamond-shaped impact block, avoid stand plate damage after wear out.
6, bearing uses Japanese, Swedish and American international brand.
7, optimal shooting mouth and more fluid curve-shaped design reduce material flow resistance, improve material pass-through capacity as well.
8, dual-use bulk material plates, it is easy to achieve two feeding method conversion.
9, special seal structure in the spindle end, ensure no oil leak even without oil seal.
10, hydraulic openings device uses Japan imported parts, it is easy and quick to move upper lid, so the internal mechanical overhaul and replacement cost less labor effort.
11, use high protection motor, which features high efficiency and low noise. The motor is in line with International Electrotechnical Commission (IEC) standard, F-class insulation and IP54/55 protection level.

SA’s GoldStone says pursuing number of exploration projects

JOHANNESBURG (miningweekly.com) – Minerals exploration company GoldStone Resources was pursuing a number of projects, in various stages of development, in Ghana, Kenya, South Africa and Tanzania, in addition to its potential mining prospects in West Africa and India, it said on Monday.

Reporting on its financial results for the year ended February 28, 2009, the Aim-listed company noted that it was planning to negotiate with one of its largest shareholders, GeoQuest, regarding the potential divestment of its interest in GoldStone.

GoldStone had, in June 2008, announced that it planned to acquire a 100% stake in the DR3-East Uranium project, in South Africa’s Western Cape province, from Hymrai Properties.

This was, however, subject to the exploration company getting approval from South Africa’s former Department of Minerals and Energy (DME), as well as a listing on the AltX.

The transaction was only approved by the DME in April this year, which made it necessary for GoldStone to make additional representations to the advisory committee of the JSE, it explained.

As there was no certainty that the AltX would grant the company the required approvals, it had decided not to pursue the listing, which meant that the acquisition agreement with Hymrai would lapse.

Any future acquisition by GoldStone of an interest in the project, or any other project in the Southern African Development Community, would require GeoQuest to divest its interest in the company or require GoldStone to list on the JSE, the company stated.

Meanwhile, the company reported that it had applied for eleven prospecting licences that formed part of its bauxite exploration project, in Guyana, in South America.

The Guyana Geology and Mines Commission had already approved the granting of eight of the prospecting licences, it added.

The company had also continued its exploration work on a number of potential gold prospects in Mali, Senegal and India.

It was expecting a prospecting permit for the Sangola licence, in Senegal, to be granted shortly, while a licence application was also under way in India.

China iron-ore prices fall to $95/t on demand drop

SHANGHAI – Benchmark iron-ore prices in China fell to $95/t on Monday, easing 17% from its nearly one-year peak of $115 in early August, as traders said many Chinese steel mills stopped buying ore for future delivery.

Indian ore of 63/63,5 percent iron content for future delivery was quoted at $95-98 a ton, including freight costs, while ores for immediate delivery were bid at about 780 yuan ($114) a ton, industry consultancy Mysteel said on Monday.

Many steel mills in the largest producing country had been purchasing only ores for immediate delivery for at least one week due to the rising uncertainties in the steel market, which has weakened since early August, iron-ore traders said.

“Everybody knows the Chinese market is a volatile market, so steel mills bought a lot when the steel market was booming and suspended purchasing as the market is fading,” a Shanghai-based steel trader said on Monday.

“We should not underestimate the momentum. India iron ore prices are likely to fall to $90 tomorrow as some sellers are impatient now,” said the trader, who works for a major private-sector iron ore trading firm.

Another trader predicted that iron ore prices in China would fall further, since many merchants had built up stockpiles when prices were hovering near $80/t.

Iron ore prices in Chinese domestic markets have been following steel prices closely for months, partly because Chinese steel mills are setting up the volumes of iron-ore purchases with their production schemes and cash positions, which are correlated with steel prices.

The surge of the iron ore prices in the Chinese market, which started in early July, was also triggered by the Chinese government’s detention of four Shanghai-based employees of Australian miner Rio Tinto on allegations of illegally obtaining commercial secrets and bribery.

China claimed a small victory after it reached a slightly cheaper iron ore price with Australian miner Fortescue this week, but talks with major iron-ore suppliers Rio, BHP Billiton and Vale are still deadlocked.

The China Iron and Steel Association (CISA), the industry group and the de facto negotiator represents Chinese steel mills in the price talks, have said excess imports was a hindrance in talks. However, a report by the China Business Journal said on Saturday that some industry experts and steel mill officials had urged the central government to replace some CISA’s executives who are leading the iron ore negotiations.

They criticised CISA for its “foolhardiness” and lack of wisdom in the negotiations, and for missing several chances to settle the price due to its insistence on a 40% price cut, according to the Chinese-language newspaper.

Construction Aggregate Processing

The construction aggregate industry covers a range of subclassifications of the nonmetallic minerals industry. Many operations and processes are common to both groups, including mineral extraction from the earth, loading, unloading, conveying, crushing, screening, and loadout. Other operations are restricted to specific subcategories. These include wet and dry fine milling or grinding, air classification, drying, calcining, mixing, and bagging. The latter group of operations is not generally associated with the construction aggregate industry but can be conducted on the same raw materials used to produce aggregate. Two examples are processing of limestone and sandstone. Both substances can be used as construction materials and may be processed further for other uses at the same location. Limestone is a common source of construction aggregate, but it can be further milled and classified to produce agricultural limestone. Sandstone can be processed into construction sand and also can be wet and/or dry milled, dried, and air classified into industrial sand.

The construction aggregate industry can be categorized by source, mineral type or form, wet versus dry, washed or unwashed, and end uses, to name but a few. The industry is divided in this document into section Sand And Gravel Processing, and Section Crushed Stone Processing.

Uncontrolled construction aggregate processing can produce nuisance problems and can have an effect upon attainment of ambient particulate standards. However, the generally large particles produced often can be controlled readily. Some of the individual operations such as wet crushing and grinding, washing, screening, and dredging take place with “high” moisture (more than about 1.5 to 4.0 weight percent). Such wet processes do not generate appreciable particulate emissions.

Pulverized Mineral Processing

Pulverized minerals are produced at specialized processing plants. These plants supply mineral products ranging from sizes of approximately 1 micrometer to more than 75 micrometers aerodynamic diameter. Pharmaceutical, paint, plastics, pigment, rubber, and chemical industries use these products. Due to the specialized characteristics of the mineral products and the markets for these products, pulverized mineral processing plants have production rates that are less than 5% of the production capacities of conventional crushed stone plants. There are two alternative processing systems for pulverized minerals.

In dry processing systems, the mineral aggregate material from conventional crushing and screening operations is subject to coarse and fine grinding primarily in roller mills and/or ball mills to reduce the material to the necessary product size range. A classifier is used to size the ground material and return oversized material that can be pulverized using either wet or dry processes. The classifier can either be associated with the grinding operation, or it can be a stand alone process unit. Fabric filters control particulate matter emissions from the grinding operation and the classifier. The products are stored in silos and are shipped by truck or in bags.

In wet processing systems, the mineral aggregate material is processed in wet mode coarse and fine grinding operations. Beneficiation processes use flotation to separate mineral impurities. Finely ground material is concentrated and flash dried. Fabric filters are used to control particulate matter emissions from the flash dryer. The product is then stored in silos, bagged, and shipped.

Flowechart for pulverized mineral processing

Crushed Stone Processing

Major rock types processed by the crushed stone industry include limestone, granite, dolomite, traprock, sandstone, quartz, and quartzite. Minor types include calcareous marl, marble, shell, and slate. Major mineral types processed by the pulverized minerals industry, a subset of the crushed stone processing industry, include calcium carbonate, talc, and barite. Industry classifications vary considerably and, in many cases, do not reflect actual geological definitions.

Rock and crushed stone products generally are loosened by drilling and blasting and then are loaded by power shovel or front-end loader into large haul trucks that transport the material to the processing operations. Techniques used for extraction vary with the nature and location of the deposit. Processing operations may include crushing, screening, size classification, material handling and storage operations.

Quarried stone normally is delivered to the processing plant by truck and is dumped into a bin. A feeder is used as illustrated. The feeder or screens separate large boulders from finer rocks that do not require primary crushing, thus reducing the load to the primary crusher. Jaw, impactor, or gyratory crushers are usually used for initial reduction. The crusher product, normally 7.5 to 30 centimeters (3 to 12 inches) in diameter, and the grizzly throughs (undersize material) are discharged onto a belt conveyor and usually are conveyed to a surge pile for temporary storage or are sold as coarse aggregates.

The stone from the surge pile is conveyed to a vibrating inclined screen called the scalping screen. This unit separates oversized rock from the smaller stone. The undersized material from the scalping screen is considered to be a product stream and is transported to a storage pile and sold as base material. The stone that is too large to pass through the top deck of the scalping screen is processed in the secondary crusher. Cone crushers are commonly used for secondary crushing (although impact crushers are sometimes used), whic h typically reduces material to about 2.5 to 10 centimeters (1 to 4 inches). The material (throughs) from the second level of the screen bypasses the secondary crusher because it is sufficiently small for the last crushing step. The output from the secondary crusher and the throughs from the secondary screen are transported by conveyor to the tertiary circuit, which includes a sizing screen and a tertiary crusher.

Tertiary crushing is usually performed using cone crushers or other types of impactor crushers. Oversize material from the top deck of the sizing screen is fed to the tertiary crusher. The tertiary crusher output, which is typically about 0.50 to 2.5 centimeters (3/16th to 1 inch), is returned to the sizing screen. Various product streams with different size gradations are separated in the screening operation. The products are conveyed or trucked directly to finished product bins, to open area stock piles, or to other processing systems such as washing, air separators, and screens and classifiers (for the production of manufactured sand).

Typical stone processing plant