In last article, 6 advantages between direct circulation and reverse circulation drilling is explained from application point of view, here will be some key point for how to design the reverse circulation drilling system. There are total 7 points the designer should care to get a perfect RC drilling system 1. How to Define Sink […]

The biggest industrial and mining exhibition in South Africa-Electra Mining Fair in 2018 will take place from 10th to 14th, Sep, in 2018, and the venue for the exhibition is Expo Centre, Nasrec, JHB, South Africa. Hardrock’s sales team will present Hardrock’s latest products on Booth No E30, we sinerely invite you to drop a […]

In last article 8 Points on How to Select Water Well Drilling Rig, the Drilling method are mentioned, here we will give some further introduction on reverse circulation drilling system. The RC is widely used in borehole drilling area especially in water well drilling and foundation drilling for big diameter hole. Reverse Circulation(RC) Working Principle The drilling theory […]

For water well drilling rig,the general requirement: simple configuration,less energy consumption,easy operation,more moveable,  Muti-functional, small size. In real application, the drilling rig selection has to be based on the stratum, hole diameter and hole depth as well as drilling method 1. Price Machine price is the key factor for people to select suitable drilling rig, […]

Supply-Side:  Characteristic of aluminium: Light-Metal (1/3 of the density of steel) High electric conductivity High resistance against corrosion Bauxite-Reserves 23 Bio. t (Guinea, Brasilia, Australia, Jamaica, China) Mining Production 200 Mio. t (Australia, Guinea, Brasilia, Jamaica, China) RPR (static) > 150 years. Specific demand: rd. 4 t Bauxite / 1 t Al. Bayer Process Bauxite […]

In last article Mineral Commodity Summary, the general analysis for most type of mineral are done. Today, let’s have a look on Iron Ore. Classification of Metals Iron and Ferro-Alloy Metals (Eisen- und Stahlveredler): Iron ore, Chromium, Nickel, Cobalt, Manganese, Molybdenum, Tantalum, Niob, Vanadium, Tungsten (Wolfram) Non Ferros Metals (Buntmetalle, Sondermetalle, usw): Al, Cu, Zn, Pb, Sn, […]

General Classification(s) of raw materials Total minerals production Short Analysis of the different raw materials Classification(s) of raw materials Energetic Raw Materials (Mineral Fuels): Non Fuel Raw Materials (Non Energetic Mat.) Metals Nonmetals Non Fuel Raw Materials: Iron and Ferro-Alloy Metals (Eisen- und Stahlveredler) Non Ferros Metals(Buntmetalle, Sondermetalle, usw) Precious Metals(Edelmetalle) Industrial Minerals (Industrieminerale) Construction Materials: Sand& Gravel (Steine und Erden) Gemstones(Edelsteine) Energy:  coal, […]

Drilling and blasting are all about putting the right amount of energy in the right place at the right time at minimum cost to achieve maximum control over the shot rock volume and the resulting particle size distribution in the muck pile Mineral/Ore Mined using the Hardrock Blast hole Drill, which are Heavy duty Rotary […]

One         Problem Worn bit head Probable cause Typical signs of back reaming to remove the hammer from a collapsed hole Corrective action Improve flushing, more air Use water or foam in flushing air to stabilize the hole Two         Problem Bit striking face damage Probable cause Difficult to find signs causing this damage, but most probably wrong type of tools have been used to remove the foot valve when replaced Corrective action Use correct tools (foot valve puller) Three         […]

Hammer Piston Casing Breakage and Tread Breakage have been demonstrated in former article, today we will show you some cases of Hammer Piston broken. Case 1          Problem Galling Probable cause The signs of wear and streaking indicate that galling is the cause of this breakage that has occurred shortly after another piston breakage in the same hammer Corrective action Make sure that piston casing is polished or honed before a new piston is installed Case 2            Problem Broken piston […]