Thursday, March 29, 2012

Basalt crushing & screening plant for sand making

Basalt crushing & screening plant for sand making

basalt quarrying plantIn Basalt crushing & screening plant, basalt stones are crushed into small pieces then screened out the suitable size.

Basalt stone crushing & screening plant is suitalle for manufacturing manufactured sand or aggregate sand for road and construction, building industry .

The basalt stone crushing & screening plant is popular in Mexico, India, Jordan, Ethiopia, Afghanistan, Cameroon, Australia and so on.

Crushing machine used in basalt crushing and screening plant

In ballast crushing plant, basalt stone crusher machine and screen machine are used.

Jaw crusher for basalt: Jaw crusher is used as coarse crusher machine in basalt crushing plant, the largest compression resistance of the material to be crushed by jaw crusher is 320MPa. The jaw crusher is widely used in stone mining, metall-urgical industry, building material, highway, railway, and chemical industry.

Impact crusher for crushed basalt: Impact crusher is used in secondary crushing process in basalt crushing plant. It is mainly used to crush many kinds of large, medium, small materials such as rock or stone whose side length is less than 500mm, and compression resistance should not be more than 350Mpa in hydroelectricity, highway, artificial rock, stone and sand, building material, etc.

Cone crusher for fine basalt crushing: Cone crusher is used as basalt fine crusher machine. It is suitable to crush various kinds of ores and rocks of medium or above medium hardness. Compare with jaw crusher, cone crusher is of stable structure, high efficiency, easy adjustment, and use economically, etc.

Vibrating screen is used as screening machine in basalt crushing and screening plant. It adopts the barrel type of eccentric shaft vibration exciter and eccentric block to adjust the swing. The screen is of the flowing characteristics, the screening line is long and specification of materials screened is various, and it is also of reliable structure, strong exciting force, high screening efficiency, low vibrating noise, long durability, convenient maintenance, safe operation, etc.

Basalt crushing and screening plant

The complete basalt crushing and screening plant is as follows:

  1. Vibrating screen + Jaw crusher + impact crusher + Vibrating screen
  2. Vibrating screen + Jaw crusher + cone crusher + Vibrating screen
  3. Vibrating screen + Jaw crusher + impact crusher (two)+ Vibrating screen (two)

SBM is a crusher and grinding mill manufacturer in China, and offer types of crushers and vibrating screen for basalt quarry plant. SBM also design The complete basalt crushing and screening plant for concrete making.

Granite processing plant

Jaw crusher for granite crushing: Jaw Crusher is widely used in granite processing plant. It is suitable for primary and secondary crushing all kinds of mineral ores and rocks with compressive strength less than 320 MPa.

Impact crusher is used for granite primary, secondary, fine crushing plant. It is widely used for sand and rock producing in the industry of roads, railways, reservoir, blasting of rock for processing and so on.

The portable crushing plant is not limited by the crushing place, and reduces high material transportation cost. The portable crushing plant can crush materials on site or work nearly. So, it is widely used in the industry of mining, metallurgy, building materials, traffic, and water conservancy facilities and so on. The portable crushing plant is the best crushing plant for granite stone quarry.

Vibrating screen is the granite screening machine used to screen out the suitable particles size. According to the different size of crushed stones and sands, choose the right screen cloth.
Granite crushing plant

In the granite crushing production lines, we can choose the right granite crushing machine according to the capacity. The granite stone crushing plant could be placed in concrete building or shed or open space. The usual crushing plants are as follows: 30-50tph, 50-80tph, 80-120tph, 120-200tph, 200-300tph, 300-400tph, 400-500tph.

We here recommend three proposals about the granite complete crushing plant:

Proposal 1: vibrating feeder + primary jaw crusher + secondary impact crusher + vibrating screen + belt conveying system + control system

Proposal 2: vibrating feeder + primary jaw crusher + fineness jaw crusher + impact crusher(optional)+ vibrating screen + belt conveying system +control system

Proposal 3: vibrating feeder +primary jaw crushers + cone crusher + fine impact crusher(optional)+ vibrating screen + belt conveying system + control system

In the above proposals, the main difference is the secondary crusher: using impact crusher, or using fineness jaw crusher, or Compound cone crusher. According to the fineness of the finished products, choose the right crushing machine to make up the complete granite crushing plant.
Granite aggregate manufacturing

In the construction aggregate production line, granite is crushed for manufacturing building aggregates and artifical sands.

SBM is a famous granite processing equipment manufacturer in China, and offer mining equipments, crusher, screening machine for granite quarry plant for producing aggregates and sands in USA, India, UAE, Canada, sri lanka, Italia, UK, Afghanistan, Angola.

Friday, March 16, 2012

The widely used Spring Cone Crusher

Spring Cone Crusher is cone crushers which is the earliest appearance in the world, and it is used widest and larger quantity crush mechanism in present. With the improvement of the series of CS cone crusher, their structure is more perfect and the technology parameter is more advanced, so these crushers have excellent performance in the aspects of manufacture, installation, use and maintenance etc.

The Spring Cone Crusher is applicable for crushing various rocks and ores with medium hardness. The Spring Cone Crusher is widely used in metallurgical, construction, utilities, transport, chemicals, building materials industry, for breaking hard, medium hardness of the above various ores and rock, such as iron ores, copper ores, limestone, quartz, granite, gritstone, etc. Type of the crushing cavity is decided by the application of the ores.

During the Spring Cone Crusher is working, the Series of Spring Cone Crusher crushes materials by the working surface between the movable cone and fixed cone. So it is more advanced and efficiency than Jaw Crusher. The movable cone is supported by spherical bearing and fixed on an hanging erect shaft which is set in the eccentric sleeve, and the sleeve is set on the stopping and pushing bearing. The movable cone and erect shaft are driven by the eccentric shaft sleeve together.

The eccentric shaft sleeve is driven by horizontal shaft and fimbriated gear, and the wheel of the conveyor belt is driven by motor through v-belts. The lower part of vertical shaft is installed in the eccentric sleeve. When the eccentric sleeve rotates, there is a conical surface lined out by the shaft. When the movable cone comes near the fixed cone, rocks are grinded into pieces, when the cone leaves, grinded materials is discharged from the discharge hole. The fixed cone can be ascended or descended by adjusting setting to adjust the width of discharge hole, consequently the output size is determined.

What's more, the series of Spring Cone Crusher also has many features and benefits, such as stable structure, high efficiency, easy adjustment, and economical using etc. The spring safety system of crusher acts as an overloading protection system that allows metals to pass through the crushing chamber so as not to damage the Spring Cone Crusher. The safety system uses dry oil and water as two kinds of sealed formation to make plaster powder and engine oil separated to make sure reliable performance.

Wednesday, February 1, 2012

South Africa Mining Equipment

One reason with the economic development of South Africa is that lately China has increased investment of many countries in Africa including South Africa, Libya, Algeria, etc. resulting in the introduction of African mining machinery industry. South Africa’s mining machinery industry development has stimulated the infrastructure of the implementation of the basic equipment and construction. During this process, the crushing equipment and grinding equipment will be the key equipments.

SBM can give you mining equipments in South Africa and SBM mining equipment adopts the brand new standards, new developed technology, its main characteristics will be the structure more modest, smooth crushing performance more good, safe and reliable operation, power saving, low noise. SBM South Africa mining equipments include crushers, jaw crusher, mobile crusher, ball mill, stone crushing machine, VSI crushers etc. We may also give you used mining equipment solution for you in mining machinery and construction industry.

South Africa Gold Mining

South Africa taken into account 15% with the world’s gold production in 2002 and 12% in 2005, though the nation had produced as much as 30% of world output even as 1993. Despite declining production, South Africa’s gold exports were valued at $3.8 billion USD in 2005. Almost 50% of the world’s gold reserves are found in South Africa.

Ball mill or ball roller mill in South Africa can be a famous grinding mill or grinder machine used widely in mining industry and ore processing industry. Ball mill is really a cylindrical device utilized to grind or mix materials like ores, chemicals, ceramic garbage and paints. South Africa ball mills rotate around a horizontal axis, partially full of the information to become ground plus the grinding medium. Different materials bring media, including ceramic ball mills, flint pebbles ball mills and stainless ball mills etc.

Grinding mills accessible in South Africa includes ball mill, Raymond mill, vertical mill, trapezium grinding mill of course, if you want to get grinding mill price or grind mill cost, contact us according the internet service for free.

Monday, December 26, 2011

Konongo Gold Project, Ghana

The Konongo Gold Project, located 200km northwest of Accra in Ghana, recommenced mining operations and poured its first gold in June 2011, within three months of obtaining environmental approval. The mine is 70% owned by Signature Metals and 30% by the Government of Ghana.

"The Konongo Gold Project, located 200km northwest of Accra in Ghana poured its first gold in June 2011."

In October 2011, Signature Metals announced its decision to be acquired by Singapore-based gold mining company LionGold. The deal is subject to the shareholders' approval. LionGold will become the new owner of the Konongo mine if the acquisition is successfully concluded.

The mine was discovered in 1903 and was operated by Mwana Africa until 1997. Signature Metals purchased the non-operational mine in May 2009 with an aim to expand mining operations in Africa.

The Konongo project comprises of 16 known gold deposits situated along the 12km strike of the Ashanti Gold Belt of Ghana. It covers nearly 192km2 of the belt area and involves re-commissioning and capacity increase of the Konongo Gold Project.

Signature Metals restarted the project in order to capitalise the potential reserves and expand the capacity to a targeted production rate of 700,000 tons per annum (tpa) while reducing the operating costs by 5% to 15%.

The project required an investment of $3bn to $4bn. AMITAAB, a Ghanaian construction and engineering company, was appointed to refurbish and reconstruct the existing infrastructure that included 350,000t of carbon-in-leach (CIL) plant.

Expansion of the Konongo mine

The Ministry of Land, Forests and Mining extended the mining license of the Konongo Gold Project by 13 years to 2023 based on the positive feasibility studies and environmental assessments completed by Tagit Consulting. The extension had allowed recommencing operations on the Konongo Gold Project which was lying idle since 1997.

The project involved refurbishment of the existing carbon-in-leach (CIL) plant and revising the mining designs and schedules to re-optimise production and operating margins. It also involved reclamation of the old Konongo tails dam.

Mining at the tails dam of the old Konongo recommenced after the environmental permit was received from the Environmental Protection Agency (EPA) of Ghana in March 2011 and continued even in the third quarter of 2011.

Gold production rates at the Ghanaian mining project

Past production from the project was reported to be 1.6 million ounces (Moz) at a head grade of 11.8 grams per ton (g/t). The expansion aimed to increase the production by 40,000oz to 60,000oz of gold at grades of 2g/t to 3g/t.

The current capacity of the mine is 2,295oz of gold doré. Signature Metals plans to ramp-up the mining operations to 350,000tpa. Proceeds from the sale of initial production will be used for further exploration and expansion of the mine.

Geology and reserves of the Konongo gold mine

Most of the Konongo Gold prospect lies in the Obenemase area of the Ashanti Gold Belt. It consists of Upper Birimian and Tarkwaian rock series folded in the northeast trend. The Upper Birimian limbs are separated by Tarkwaian sediment in the syncline core in the southeast.

"The mine is 70% owned by Signature Metals and 30% by the Government of Ghana."

Mineralisation occurs in quartz reef style in disseminated sulphide present within the Upper Birimian Volcano-sedimentary rocks.

The Old Konongo tails dam contain indicated and inferred resources of 61,150oz graded at 1.09g/t on an average.

The total resource in the reclaimed project as of June 2010 is 19.6 million tons of gold graded at 2.02g/t for 1.27moz of contained gold.

The old Konongo project was an open pit operation. The expansion operations commenced with the mining of the new and existing open pit operations at the Apan, Asewera, Atansu and Boabedroo deposits located within a radius of 1k to 2.5km of the centre of the project area.

Transport and handling

Konongo Gold Project is accessible via sealed roads from the Tema Port in Accra. It is also in proximity to port facility at Takoradi, which is 300km south of the project area.

Ghana's high transmission electrical line also runs from the project area with a substation situated in the property. All other support business and services are located within 50km of the project area in Kumasi.

La Guitarra Silver Mine, Mexico

La Guitarra silver mine is situated 130km southwest of Mexico City in the Temascaltepec Mining District. The mining district is 100% owned by Canadian mining company Silvermex Resources and covers an area of 397km2.

The operations of the La Guitarra mine first began in the early 1550s and were ceased in the 19th century due to lack of technology and investment.

The mine was reopened in 1990 by Compania Mineria Arauco with an initial production capacity of 30 tons a day (tpd). Luismin purchased the licensing rights of the mine in 1993 and expanded the production rate to 340tpd.

Genco Resources (thereafter renamed Silvermex Resources) acquired the La Guitarra mine and a 340tpd processing plant from Luismin in August 2003.

The mine was closed in 2009 due to lack of development. Its operations recommenced in April 2010 and achieved its full production capacity of 320tpd in November 2011.

Reserves of gold and silver at the Mexican mine

Proven and probable reserves of the La Guitarra mine stand at 11mt graded at 113g/t Ag and 0.93g/t Au.

Geology of the Temascaltepec mining district

"The mining district is 100% owned by Canadian mining equipment company Silvermex Resources and covers an area of 397km2."

The La Guitarra mine lies in the southeastern end of the Mexican belt. It is situated in the southern part of the Sierra Madre Occidental or the Mid-Eocene Ignimbrite volcanic terrain.

The region is characterised by mafic volcanics of the Trans-Mexican belt superimposing the intermediate to felsic Eocene volcanics.

The mine hosts rocks from Mesozoic schist and slates to Tertiary age volcanics and intrusives. It is understood to have been mineralised due to the late Miocene volcanic disruptions.

Hundreds of epithermal veins cross the property. The veins are classified into four main trends namely El Coloso / Nazareno, La Guitarra, Mina de Agua and El Rincon. These veins are spanned to a strike length of 15km and depth of 4km.

Mineralisation at the La Guitarra silver mine

Mineralisation is hosted in the vein type ore bodies in the form of quartz-monzonite compositions. Silver mineralisation occurs in silver sulphides, acanthite, polybasite, proustite-pyrargyrite, sulfosalts and electrum.

Gold mineralisation contains electrum particles and free gold with oxidation features.

Other minerals include white crystalline quartz, chalcedony, amethyst and adularia, sphalerite, pyrite, fluorite, calcite, chalcopyrite, barite, galena and clay.

Production rates, mining methods and ore processing at La Guitarra

Production at the mine commenced in 1993.

"La Guitarra silver mine is situated 130km southwest of Mexico City in the Temascaltepec Mining District."

The mine produced 57,343t of ore containing 303,847oz of Ag and 3,284oz of Au between January 2011 and September 2011.

The La Guitarra deposit is mined using both open-pit and underground mining techniques. The conventional drilling and blasting is carried out in the open-pit operation. In the underground mining, access to cut and fill stope is provided by adits and ramps.

The development involved three operational pits (Los Angeles, La Cruz and Creston) and four main vein trends.

The stockpiled ore is processed in a concentrating mill having a rated capacity of 340tpd. It is crushed to 12.5mm in three stages by using jaw crushers.

The crushed ore is fed to two stockpiled conveyors for transmission to two grinding mills operating in parallel. The ground ore is carried to two counter current decantation (CCD) thickener circuits to undergo cyanide leaching in agitated tanks and generate pregnant solution.

The pregnant solution is transferred to the standard Merrill-Crowe Zinc Precipitation Circuit to recover silver and gold. The precipitates are fed to smelter to remove the contaminants and produce pure silver and gold dore bars for export.

The barren solution from the precipitation circuit is recirculated to the grinding circuit and CCD thickeners.

Tuesday, December 13, 2011

Sand Making Machinery for Sale in South Africa

In the middle of 2011, South Africa government plan to invest 95.5 billion USD dollars to infrastructure construction. For example, the rail way construction, the road construction, etc. Obviously, these construction projects will consume great many stone aggregates and sands. Great many business chances are created with making this policy. At this time, sand making machine in South Africawill be widely used.

sand-making-machinery-for-sale-300x204

Double Sand Making Machinery for Sale in South Africa

Sand making machines are Double key equipments all the time. In Australia, in Canada, in Spanish and other countries, Double sand making plants can be fond. Till now, we have a few sand making machines shipped to South Africa, but we do believe in the future, great many sand making plants in South Africa with Double products will be built with South Africa infrastructure construction.
The popular Double sand making machines are our VSI series and B series deep rotor vertical shaft impact crusher.

Double VSI sand making machine is used as the tertiary crusher in sand making crushing plant. The crushed sand (0~5mm) is very popular in concrete mixing, building and road construction industry. Also, VSI is widely used in metallic and nonmetallic ore, building material, manufactured sand crushing industries and in aggregates reshaping processing.

Advanced double pump oil lubrication system is used in VSI series sand making machine. This system ensures the machine is able to steadily work even one of the pump breaks down. As a result, the maintenance frequency and the downtime reduce obviously. Meanwhile, this type sand making machine is easy for maintenance because of hydraulic lift cap system.
The latest B series deep rotor vertical shaft impact crusher has many more advantages compared with the traditional VSI sand making machine:
1.Higher capacity: It adopts deep rotor, it is about 50% higher than normal rotor, which means more materials can be fed to the rotor and higher rotor throughput.
2.Longer service life: the deep rotor ensure the material go through the rotor smoothly, as a result, attrition is decreased and the service life of wear parts increase about 30%-50%.
3.Lower production cost: Optimized designs are used in the spare parts, such as segment design of rotor tip, application of diamond impact block and segment design of chamber lining plate.

South Africa sand making plants

One machine can not finish the work. One complete sand making plant consist of various crushers, such as jaw crusher, cone crusher, impact crushers, vibrating screen, etc. Double would like to help you find the best solution and offer the matched equipments matched with our design. In this way, the whole plants can work very well and you will get much more profit from South Africa sand making plants.
If you plan to invest in sand making plants in South Africa, or if you have any problems about the crushing industry, just be free to contact us. You can leave your email, we will answer you within 24 hours; you can also chat with our engineer on-line, this way, you can get many details immediately.