Recovery and Refining of Precious Metals by C.W. Ammen

By C.W. Ammen

This publication is the made from 40 years of hands-on physiochemical paintings with either ferrous and nonferrous metals and with the metallurgy of refining. extracting. and casting. Its function is to hide a few of the equipment of restoration and refining of useful metals. either fundamental sources-placer gold. black sand. and ores-and secondary resources­ scrap jewellery. digital scrap. outdated movies. buffings. spent plating and stripping recommendations. catalytic car converters. and previous eyeglass frames-are coated. the knowledge contained during this quantity is especially simple and is meant for hands-on program and use. it's for nonchemist and chemist alike. i can't speak about the mathematical formulation for a few of the chemical reactions that take place-I go away them to the reader who desires to bring up his operating wisdom and knowing of chem­ istry. there are numerous classes provided in chemistry and extractive metallurgy. in addition to a couple of books to be had for self-study. the aim of this booklet is to coach you the way to accomplish numerous extractive. refining. and checking out operations on important metals (in a number of varieties and states). with a ensuing finish product. you are going to find out how to practice operations in assaying and extraction. qualitative research. quantitative research. checking out. classifying. and con­ centration-some of a in simple terms mechanical nature. a few of a chemical nature. Oualitative research includes the id of an unknown fabric. to do that. you want to have a plan of checking out or assault. for instance.

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S. S. liquid) ................... 573 milliliters milliliter ............. S. S. apothecaries) .............. 6967 milliliters liter ....................... S. S. liquid) ...................... 94633 liters liter ...................... S. S. liquid) ...................... 78533 liters Mass 1 1 1 1 1 1 1 1 gram ................................ 4324 grains grain .................................. 0648 grams gram ................... 03527 ounces (avoirdupois) ounce (avoirdupois) ....................

09290 square meters square meter. . . . . . . . . .. 1960 square yards square yard .................... 8361 square meters square kilometer ............ ~ .... 3861 square miles square mile .................. ) ........................ 4,840 square yards Volume 1 1 1 1 1 1 cubic cubic cubic cubic cubic cubic centimeter. . . . . . . . 0610 cubic inches inch . . . . . . . . 3872 cubic centimeters meter ........................ 314 cubic feet foot ......................

1bA =-'" Melting~%_Wick W ick W ick Too Correct Size Small i J "v-d, ~ ;'. il: 1 "",,. ~~ :''''~''''..... t~~ ....... Figure 3-10 Correct and incorrect wick sizes it can be mastered, and you will be able to produce a desired flame for a considerable length of time with little or no fatigue. The idea of "blowing" the blow pipe is actually somewhat misleading: the force for the passage of air through the blow pipe comes not from the lungs but from the cheeks. which are distended (puffed out) and act like a bellows.

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