We take many things in the material world for granted, not realising or appreciating their presence or value. Construction materials that make up the material world around us come into this unconscious, “invisible” category. Though you see buildings, roads, footpaths and bridges every day, its almost certain that you have never thought about what the materials are, what they are made of, or where they come from. The vast bulk of our built environment is formed from raw materials won from the earth by the extractive industries. Without the raw materials with which to build houses, hospitals, schools, factories, roads, etc., life would certainly be more basic and less comfortable than we presently experience.
Stone quarrying is the multistage process by which rock is extracted from the ground and crushed to produce aggregate, which is then screened into the sizes required for immediate use, or for further processing, such as coating with bitumen to make bituminous macadam (bitmac) or asphalt.
The process begins with a detailed three-dimensional survey of the quarry face. This allows the explosives engineer to design the blast and to plot where the shot holes should be drilled so that the blast can be carried out safely and efficiently. The survey will show if there are any bulges or hollows in the face. A bulge will need more explosive than normal to ensure that it is completely fragmented and not left in place in the face. Hollow areas require less explosive than normal. The placement of explosives is professionally planned to ensure that the required fragmentation of the rock is achieved with the minimum environmental impact.
After the face profiling survey, the drilling contractor arrives. Using an air operated drilling rig, he drills the number of shot holes required, at the marked spots corresponding to the hole positions on the blast design, at the angles and depths required. After the shot holes have been drilled, they are surveyed to check that they correspond to the blast design and the two surveys are combined to allow the blast engineer to work out how each shot hole is filled with explosives.
Four giant in-pit crushers are taking shape at Citic Pacific mining ‘s Sino Iron project at Cape Preston in north west WA. They may be becoming manufactured by ThyssenKrupp, with components getting fabricated in Australia, Germany and China.
In terms of installation progress, a spokesman from owner Citic Pacific Mining (CPM) told the AJM in mid- February that “the first two of 4 crusher pocket slots are completed as well as the first in-pit crusher is becoming installed. The bucket wheel reclaimer installation is pretty much completed.
“In terms of start off up date, the initial shipment of ore is anticipated towards the latter component of this year.”
The in-pit crushers supplied will probably be gyratory, 60″ x 89″, using a capacity of 5,100 tph. They’ll be powered electrically by the project’s combined-cycle gas-fired power station and have been integrated into the mine style.The article is provided by Henan Hongxing,which is the professional manufacturer of complete sets of mining machinery, such as Rock crushers,Rotary kiln, it is always doing the best in products and service.You can visit Hongxing at http://www.hxjqchina.com.
- Author Articles
- More From This AuthorTechnorati is a blog submission site that ranks blogs. In other words, it is a search engine used solely for blogs. Once you have successfully submitted the blog, use tags to your advantage, since they are...With the help of high quality display panels, it is possible to increase business and attract more visitors to your sale venue. For instance, if you are putting up a stand in an exhibition, an attractive board...Social bookmarking sites were started as an alternative to web browser bookmarking. Instead of users bookmarking their favorite links on their web browsers, now they have an option to join many social...First impressions count when potential customers walk into your store and immediately, they are making subconscious comparisons regarding your store presentation. It is a fact, that shoppers prefer having...Most of us have taken a personality test at some point in our life. While some of us have taken it at school, others have taken it while trying for a job. It is important to understand that these tests are...
- Related Articles
- Related ArticlesThe night is young! This line is definitely true especially if you plan and or leading the swingers life. If you plan to get naught wild and sexy then it’s safer and better to join a swingers website club...You must have spent huge amount of money on buying machines and gear for your home health club. Many fitness conscious guys spend too much in form of fitness center fees and also paying for the instructors...One of the most difficult things to get yourself accustomed to a pricking a finger to get the blood sample glucose reading. Diabetic testing supplies can be difficult to master at first, because sometimes you do not even stick your finger a few times befoMany people think that coming to terms with being diagnosed diabetic may seem emotionally overwhelming. Big changes must be in your life that you properly treat diabetes. It is very likely that you need to...Browsing and looking for cool stuff on the Internet is a benefit that we all have access to. As a matter of fact, there are limitless applications which you can download for free that will make your...Technology is making its presence felt in ever-increasing ways across industries nationwide. In some fields, the presence of supportive technology is new. In other fields, technology has long been a part of...
- Latest Articles
- Latest ArticlesA Mother or Father will find themselves upon death in a high position in Paradise, and they will ask Allah, "By Allah, how can I be in a position such as this, when I feel I do not deserve such a position?"...Getting the company of Manchester girl is something that everyone wishes to have in his trip. You may come across many young and vivacious girls in this city that are completely stunning ladies. These girls...From the first glance the River Seine in Paris may just look like a plain river which runs through Paris, but it happens to be much more than just that, having turned into a major tourist attraction and a...In our everyday living, we entertain ourselves with films, video clips, music and information on the portable unit, while traveling in bus or being at home. For online video most well-known source is ...Clearbrook remedy Centers is a moderation-based, worldwide mesh of people who are selecting to reside in recovery for alcoholic beverage rehab in new York. We boost folks to construct their own individual...