Chapter 1 Industrial Characteristics of Metal Deposits The concept of a deposit includes both geological and technical economic aspects. In terms of geological meaning, a deposit shall be understood to include an ore body and a comprehensive geological body composed of surrounding rock and structure associated with the ore body in terms of space and genesis; and in terms of technical economic meaning, the deposit refers to The useful mineral aggregates formed in the earth's crust due to geological processes and qualitatively and quantitatively suitable for industrial scale mining and utilization. A metal deposit is a deposit containing metal minerals. The first section of ore and surrounding rock and its industrial characteristics 1. Ore body and surrounding rock, ore and waste rock An ore body is an ore aggregate that has a certain position, shape and size in space and is a tomb unit that constitutes a deposit. The rock around the ore body is called the surrounding rock. The boundary between the ore body and the surrounding rock is obvious, and it can be distinguished by the naked eye; some are gradual, and the result can be determined according to chemical analysis. The mineral aggregates in the earth's crust are called ores that can extract the metal or mineral products necessary for the national economy on an industrial scale according to the modern technological level. For inclusions that do not contain useful ingredients or have too little useful ingredients, which are currently considered to be ore mining, are collectively referred to as waste rock. The concept of ore and waste rock is relative, and it changes with the level of development of the national economy. Generally speaking, the boundary between ore and waste rock depends on the following factors: the state's social system and the prescribed technical and economic policies; the deposit conditions and ore reserves; the technical level of mining and ore processing; the local economy. And geographical conditions, etc. When the above factors are certain, the competent national authority will divide the ore body and surrounding rock or ore and waste rock boundaries according to the defined ore boundary quality and the lowest industrial grade index. The so-called cut-off grade is the minimum requirement for the content of useful components of a single sample of the ore body. It is the boundary between the ore and the waste rock, the ore body and the surrounding rock. The minimum industrial grade refers to the minimum requirement for the average content of the main useful components of the ore section exposed by a single exploration project, or it is the lowest average grade of the ore or ore body available for industrial use. The competent national authorities have provisions for both the cut-off grade and the minimum industrial grade indicator. When mining extremely thin vein deposits, the meter percentage index is generally used to determine the minimum industrial thickness. The so-called meter percentage value refers to the product of the true thickness of the vein and the crystal position of the vein, and is taken as the unit. For example, the percentage index of meters specified by the competent department of the black tungsten deposit is 0.1~0.2m%. This indicates that this indicator is used to measure the mining value of each vein only when the thickness of the vein is less than the minimum recoverable thickness and the grade of the vein is high. Ore grade refers to the weight percent of useful metal content in the ore, expressed as a percentage (%), and is usually expressed as g/t or g/m3 for precious or rare metals. In the mining industry, the unmined ore in the deposit is often referred to as the original ore; the combination of the pure ore produced and the mixed waste rock is called the ore. Second, the type of metal ore Metal ore refers to ore containing a metal component. Metal ores can be classified as follows depending on the type of metal, grade, and chemical composition. (1) Press the metal species contained can be divided into: ferrous metal ores, such as iron, manganese, chromium and the like; non-ferrous metal ores, such as copper, lead, zinc, aluminum, tin, molybdenum, nickel, antimony, and tungsten; precious Metal ores, such as gold, silver , platinum, etc.; rare metal ores, such as silver, antimony, bismuth, etc. A single metal ore containing only one metal component and a polymetallic ore containing two or more metal components. (2) The metal grade of the amine can be divided into: lean ore and rich ore. For example, magnetite ore is as follows: iron grade >55% is open furnace rich ore; iron grade >50" is blast furnace rich ore; iron grade 30~50% is lean ore. Lean ore must be subjected to beneficiation for smelting. (3) The composition of the chemical components contained in the amine can be divided into: natural metal ore, the metal component of the ore exists in the form of a single element, such as gold, silver, platinum, copper, etc.; oxidized ore refers to the mineral contained a class of ores whose oxides are oxides, carbonates and sulfates, such as magnetite (Fe+Oi), hematite (Fe20+), leucite (PbC0+), pyrolusite (MnO'), etc.; Ore, the chemical composition of ore & minerals is sulfide, such as chalcopyrite (CuFeS2), galena (), molybdenite (m0s22), etc.; mixed ore, which means that the ore contains the first three minerals. Two. Plastic Chair Injection Molding Machine Plastic Chair Injection Molding Machine,Plastic Chair Blowing Machine,Plastic Small Chair Making Machine,Plastic Bucket Injection Moulding Machine Ningbo Jietan Machinery Equipment Trading Co., Ltd. , https://www.jietanmachinery.com
Chapter 1 Industrial Characteristics of Metal Deposits
The mining work is targeted at deposits whose products are ore. The so-called metal deposits in underground mining, is based on industry characteristics of the deposit, and to follow the basic principles of mining deposits, there are plans from within the metal deposits will systematically mining the ore out.