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Samples of "ground granulated blast furnace slag" (left) and "granulated blast furnace slag" (right) Ground granulated blast-furnace slag (GGBS or GGBFS) is obtained by quenching molten iron slag (a by-product of iron and steel-making) from a blast furnace in water or steam, to produce a glassy, granular product that is then dried and ground into a fine powder.
Slag can also be used to create fibers used as an insulation material called slag wool. Slag is also used as aggregate in asphalt concrete for paving roads. A 2022 study in Finland found that road surfaces containing ferrochrome slag release a highly abrasive dust that has caused car parts to wear at significantly greater than normal rates. [14]
Quern-stones are stone tools for hand-grinding a wide variety of materials, especially for various types of grains. They are used in pairs. The lower stationary stone of early examples is called a saddle quern, while the upper mobile stone is called a muller, rubber, or handstone. The upper stone was moved in a back-and-forth motion across the ...
The Knife-grinder by Goya shows a man using a portable grindstone. A grindstone, also known as grinding stone, is a sharpening stone used for grinding or sharpening ferrous tools, used since ancient times. Tools are sharpened by the stone's abrasive qualities that remove material from the tool through friction in order to create a fine edge.
Typically, crushed nut shells or fruit kernels. These soft abrasives are used to avoid damaging the underlying material such when cleaning brick or stone, removing graffiti, or the removal of coatings from printed circuit boards being repaired. Synthetic This category includes corn starch, wheat starch, sodium bicarbonate, and dry ice. These ...
The first sale outside the MIM Holdings group also occurred in 1995, with the sale of three smaller "M1000" IsaMills to Kemira for grinding calcium sulfate at one of its Finnish operations. [ 6 ] A fifth M3000 IsaMill was installed in the McArthur River concentrator in 1998 and six more in the Mount Isa lead–zinc concentrator in 1999.