The developme~ of economic techniques of mining and concentrating taconite (fine• grained, Ierruginous jasperoids) led to the introduction of the iron-ore pellet, which is now becoming the major form in which iron is introduced into the furnace. The tre• mendous reserves of magnetic taconites of the…
IN VIEW OF their high hardness, chemical inertness and excellent mechanical behavior at high temperatures, ceramic oxides (in particular, alumina) offer excellent advantages over high speed steels and carbides for cutting tool applications. 1-6 A disadvan• tage of…
Fluid inclusions in quartz phenocrysts of quartz porphyry, quartz veinlets cutting quartz porphyry, and quartz and sphalerite in ores, were studied by the heating-stage and freezing-stage methods. Polyphase fluid. inclusions carrying transparent cubic crys• tals were especially found …
By increasing the stress tending to compact the un• consolidated deposits by as much as 50 percent, man has created the world's largest area of intense land subsid• ence in the west-central San Joaquin 'Valley. With• drawal of ground water for agriculture has caused more than 2,000 square miles to subside …
MACROCRaCK foRMATION has been observed by the U.S. Navy in a number of porcelain base insulators used to support large radio communications towers. These cracks do not, per se, impose a severe structural limitation because the primary stresses in the insulator are compressive. In the presence of the high voltage rf fi…
Ceramic raw materials are largely distributed in Inchnesia. Rather large anount of good quality kaolin deposits occur in the area of Bangka and Bilito~, whereas the ceramic factories are generally located in Java. Ch the island of Java the ceramic raw materials, having small res…
Bahan galian sebagai salah satu sumber daya alam adalah merupakan modal -dasar pembangunan yang pemanfaatannya harus -usahakan agar tidak merusak tata lingkungan h i dup manusia engan memperhatikan faktor-faktor yang merupakan komponen ingkungan hidup. srategi Pembangunan di •Indonesia sebagaimana …
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65 halaman, daftar tabel, daftar foto, daftar gamb