Search results for keyword: ancient
Pyrochemical Smelting of Antimony
Tin Refining by Fire
Tin refining is an ancient process. It was first used in China, in around 2000 BCE and was perfected during the Roman period. The basic process is the same as that used today: tin ore, or “tin stone”, is heated in a powerful furnace – usually an open hearth or reverberator......
1091 
Jennifer
Rammelsberg mine
Ramelsberg Mining
The Ramelsberg mining area has a long and varied history, with mining of copper, silver, and gold stretching back more than 800 years. Mining in the area ensued first with surface mining, followed by open-pit mining, and finally, underground mining. This makes the Ramelsberg min......
China National Mine Park
Chinas National Mining Park
Located in Qi Dashan, Henan Province, Chinas National Mining Park is a former open-pit coal mine that is now a big eco-tourism tourist destination. Featuring an unparalleled mineral wealth, the park has now been reinvented as an eco park that is a paradise for nature l......
to cut
Corporate Social Responsibility
Corporate social responsibility (CSR) is an integral part of any business. It is a term that has many definitions, and companies should have an ethical social responsibility plan that fits with their values and meets the needs of their stakeholders. Some people fee......
medium crushing
Year in Review
This year has been a year of contrasts, challenge and success with lockdowns and restrictions to control the spread of the global pandemic that has engulfed the world. In some places, the response to the pandemic has been aided by advanced technology with hot spot testing being use......
Ordinary sinking method
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Cable-Tool Drilling: Channeling the Earth with a Bit and a Spade
Cable-tool drilling, also known as percussion or spudding drilling, is an age-old method of using a large bit with a weighted chisel attached to it and pounding it into the ground. This method has been used since ancient tim......
caisson
The Fountain of Life
The fountain of life, often referred to as the fountain of youth, is an ancient belief that a person can regain their youth, vitality and health by consuming or drinking from a particular substance, usually a magical elixir or a special spring or fountain. In some cultures it......
Independent foundation
Introduction
Having a good set of independent basics is an essential part of being an adult. It starts from being able to take care of yourself, from getting a job to being able to balance your bank account and even to solving your professional and personal problems. In today’s world where there......
Well support
Tunnels and Shafts: Their Construction and Uses
Tunnels and shafts are engineering structures used to facilitate access to underground and underwater locations. Tunnels are underground passages of varying sizes and shapes, connected with and sealed from their surrounding environment to allow for ......
caisson
In the crowded Los Angeles neighbourhood of Huntington Park, the Santa Ana River has been flowing since long ago, providing invaluable fresh water to local residents. But it was not until recently that the river has become a source of inspiration and hope for the people here.
Every day, people fr......
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