论文部分内容阅读
岩鹽是一種礦物,它的化学成分是氯化鈉,是人類食用上不可缺少的東西。但是從地質學上看来,它和其他岩石一樣,都是通過自然的程序沉積而成的。在地層中又廣泛的存在着,因此也把它當做一種岩石看,所以有時叫做岩鹽。事實上食鹽的用途,並不限於單純的食用品,它也是化学工業上的重要原料,因此它在工业上佔着很重要的地位。古人常說到某某地方有“漁鹽之利”時,便是說那個地方一定很富庶,由此可知食鹽在人類經濟生活上的重要。岩鹽是一種水成岩,常常存在於海相和湖相岩層中。原來海水,含有大量礦物質,每一立方公升的海水,含有35克的礦物質,其中27克就是食鹽,佔全部礦物質百分之七十八,或佔海水的千分之二十七。不過這個比例是一般的,事實上不同地方的海水和
Rock salt is a mineral whose chemical composition is sodium chloride, which is indispensable for human consumption. But from a geological point of view, like other rocks, it is deposited through natural processes. It is widely found in the strata, so it is also considered as a kind of rock, so it is sometimes called rock salt. In fact, the use of salt is not limited to pure food products. It is also an important raw material for the chemical industry. Therefore, it plays an important role in the industry. The ancients often said that when certain places had “profits for salt and fisheries”, it was said that the place must be very rich, and therefore the importance of salt in human economic life was known. Rock salt is a type of sedimentary rock that is often found in marine and lacustrine rock formations. The original seawater, containing a lot of minerals, each cubic liter of seawater, containing 35 grams of minerals, of which 27 grams is salt, accounting for 78% of all minerals, or accounting for 27% of seawater. However, this ratio is general, in fact the seawater and