How do Seawater Greenhouses Work? A seawater greenhouse is a type of greenhouse technology that utilizes seawater to grow crops in arid or desert regions. It combines two main elements: the greenhouse structure and the seawater desalination process. Here’s how a seawater greenhouse typically works: 1. Greenhouse Structure: The greenhouse is designed to provide a … Read more
Balancing Resource Extraction and Water Sustainability Lithium, a key component in batteries that power electric vehicles and store renewable energy, has become increasingly vital in our pursuit of a sustainable future. As demand for lithium rises, so does the importance of understanding and addressing the environmental impact of its extraction. One critical aspect of lithium … Read more
Direct Lithium Extraction (DLE) is an innovative method of extracting lithium from brine or other lithium-rich sources without the need for traditional evaporation ponds. Unlike conventional lithium extraction processes, which rely on the natural evaporation of water to concentrate lithium, DLE techniques offer a more efficient and environmentally friendly approach. The traditional lithium extraction process … Read more
In approaching the subject of diamond-drilling practice, a brief history of the origin and development of the diamond drill may be of interest. The use of black diamonds for boring holes in rock was discovered in 1863 by Rudolph Leschot, a French engineer. In 1864, he employed a diamond bit to bore holes for blasting … Read more
Frequently the careful engineer puts the word porphyry in quotation marks or precedes it with “so-called,” when he writes of the Porphyry Copper mines. This is done by way of serving notice that he is aware that the term is not a precise one, though no one who is informed on the subject would in … Read more
While reflecting on the subject of my present paper, I soon realized that it would be very difficult to say something really new about any special aspects of metallurgy. In consideration of the excellent scientific work that has been done in the United States in connection with almost all the fundamental questions that are of … Read more
Sandy flint and pyritic plastic clays from east-central Missouri can be beneficiated to good firing quality by ore dressing methods. Quartz and pyrite were the chief contaminants removed by the two gravity concentration methods used in the studies. Most iron-oxide minerals in these clays occur as finely-divided, low-gravity, hydrous material, often in the form of … Read more
This circular summarizes the research and technologic activities and publications of the Federal Bureau of Mines Division of Explosives Technology during fiscal year 1959 (July 1, 1958-June 30, 1959). Part I briefly describes the programs that were active during the report period and presents a summary of some of the information not published elsewhere. In … Read more
Construction of a 250-p.s.i.g. helium-recycle system to operate with gas temperatures as high as 2,500° F. appears feasible. More development work is required, however, on heat exchangers and compressors. Many problems inherent in large nuclear systems are not present in the pilot-scale ISR system. Although the cooler in the ISR loop operated satisfactorily, thermal expansion … Read more
The principal official test performed by the Bureau of Mines to determine the permissibility of coal-mine explosives, commonly referred to as the gallery test, has been in use at the Bruceton station for many years. In this test the explosive under study is loaded into the borehole of a steel cannon and fired into a … Read more