Техническія лабораторіи имѣютъ огромное значеніе въ дѣлѣ инженернаго обученія. По этому вопросу не можетъ быть двухъ мнѣній. Благодаря лабораторнымъ занятіямъ, учащійся пріобрѣтаетъ въ школѣ первые элементы профессіональной практики, легче и глубже усваиваетъ сущность изучаемыхъ предметовъ и, наконецъ, пріобрѣтаетъ знаніе методовъ и пріемовъ научныхъ изслѣдованій различныхъ процессовъ, дѣйствія машинъ, отдѣльныхъ механизмовъ и т. д. Послѣднее особенно важно. Это, именно, та часть научной подготовки инженера, которая можетъ быть достигнута только въ школѣ и которая требуется отъ него въ настоящее время болѣе, чѣмъ когда-либо прежде. <...>

This paper presents a brief overview of some IRGIREDMET advances in gold hydrometallurgy. Original impulse-percolation technology and equipment for intensive cyanidation of gravity
concentrates have been developed and introduced into industrial practice by IRGIREDMET since 1980s (RF Patents N1593250). The process is based on leaching using special hydrodynamic and reagent conditions providing high dissolution rate for coarse gold particles. Gold and silver are precipitated from pregnant solution by cementation or electrowinning. There was also proposed an improved cementation method using zinc in a contact with electrically conductive material.

Рассмотрен широкий круг вопросов, касающихся особенностей физикохимии элементарного акта флотации мелких частиц, кинетики микрофлотационного процесса, теоретических основ оптимизации технологии флотационной водоочистки и обогащения полезных ископаемых. Большое внимание уделено технологии микрофлотации, флотационным аппаратам для очистки воды и извлечения ценных минералов высокой степени дисперсности. Показаны области применения флотационной очистки воды в различных отраслях народного хозяйства.

Предназначена для инженеров-технологов станций водоподготовки и обогатительных фабрик, а также научных работников, специализирующихся в области коллоидной химии. Может быть рекомендована студентам и преподавателям вузов соответствующих специальностей

In the past several decades considerable emphasis was placed on investigation of flotation properties of industrial minerals. The interest in process development for beneficiation of various industrial minerals also comes from the growing need to recover economic minerals from lower grade ores. In general terms these ores in which the minerals exist as ores are associated with, complex, silicates do not respond to the concentration methods used to treat higher-grade less complex mineral silicate ores.

Without reagents there would be no flotation, and without flotation the mining industry, as we know it today, would not exist. Reagents in mineral processing are therefore an inseparable part of the flotation process. Many books, articles and patents exist on development of reagents, reagent chemistry and reagent application.

The forms in which metals are found in the crust of the earth and as sea-bed deposits depend on their reactivity with their environment, particularly with oxygen, sulphur, and carbon dioxide. Gold and the platinum metals are found principally in the native or metallic form. Silver, copper, and mercury are found native, as well as in the form of sulphides, carbonates, and chlorides. The more reactive metals are always in compound form, such as the oxides and sulphides of iron and the oxides and silicates of aluminium and beryllium. The naturally occurring compounds are known as minerals, most of which have been given names according to their composition (e.g. galena—lead sulphide, PbS; sphalerite—zinc sulphide, ZnS; cassiterite—tin oxide, Sn02 ).

A handy reference book for miners. This book contains the latest specifications and essential information on aggregate and minerals production and handling equipment. It should be noted that various factors, such as engineering advances, physical properties of raw materials, method of feeding and operating the equipment, moisture and physical conditions in material at the time of processing, altitude and other conditions will affect the equipment ratings as published and may yield results not exactly in accord with published data.

This book is designed to describe the basic principles used in the concentration of specific minerals from their ores. It further deals with the development of these principles in industry and the requirements for effective process control. The earlier editions were written in connexion with the teaching of mineral technology at the Royal School of Mines in London, and were designed to be used together with the laboratory study and plant experience essential for a sound grasp of this science and its applications. This correlation of principles and practice is continued here.

A processing plant costs many millions of dollars to build and operate. The success of this expenditure relies on the assays of a few small samples. Decisions affecting millions of dollars are made on the basis of a small fraction of the bulk of the ore body. It is therefore very important that this small fraction is as representative as possible of the bulk material. Special care needs to be taken in any sampling regime, and a considerable effort in statistical analysis and sampling theory has gone into quantifying the procedures and precautions to be taken.
The final sampling regime adopted is, however, a compromise between what theory tells us should be done and the cost and difficulty in achieving this in practice.

The Earth’s Crust is the topmost solid layer of the Earth which has a thickness of 30–35 km in the continents and 5–6 km in the oceans (the Mantle and the Core being the other two inner parts of the earth). According to F.W. Clarke, the abundance of Chemical elements in the earth’s crust is shown in Table 1.1. The chemical elements that occur in the earth’s crust in compound forms are known as minerals. However, certain elements like Gold, Silver, Platinum and Copper often occur in native form.