It is seldom that one can pass a jeweller’s window and not gaze in fascination at the beautiful wares on offer. The gold chains glint beneath the lights, tempting the purchaser with a lustrous glow that is particular only to gold itself. We don these expensive decorative items, but offer little thought to how they come into being.
Gold chains begin life in a very different form to what we purchase in the high-end jewellery store. South Africa, the United States of America and Australia are What Is The Major Industries In Indonesia the largest gold producers in the world, in that order. In the United States, most gold is obtained above the ground, in what is referred to as open pit mining.
Believe it or not, geologists are called upon to do land surveys and by use of such tools as geochemistry and state of the art satellite surveys, they determine where an ore deposit might Industrial Production Investopedia be found. Computer graphics are used to design the layout of the mine long before any physical steps are taken. Once all the necessary permits are obtained, things begin to progress.
Samples of the gold ore are extracted and examined to determine the quality and metallurgical characteristics. Depending on the rock type and quality of the ore, the broken rocks will either be sent to an area for processing low grade or high grade ore. Low grade ore is broken into smaller pieces and set to percolate in a diluted cyanide solution, which dissolves the gold. This solution is then collected.
High grade ore is generally ground into powder in a specialized mill and then undergoes one of three processes. It may either be heated to 1,000 degrees Fahrenheit, burning off all the sulphide and carbon, before being passed on to the leaching circuit, where it is dissolved with a cyanide solution. Alternatively, it may go directly to the leaching circuit or it is oxidized to separate the gold from other minerals.
Activated carbon is then used to leach the gold from the cyanide solution. The next step in the process is to strip the gold from the carbon in a specialized process. The gold containing solution is then put through an electrolytic process and the gold is then melted into gold bars. The gold bars are then sent to a refinery where the refining process renders them 999.9% pure.
The gold is then put through a process of annealing (heating and then quenching) as it is put through a rolling mill, stretching it out into gold wire. It is this gold wire that is purchased by the gold smith or gold manufacturer. Gold chains are either handmade or mass produced.
The goldsmith then works the gold wire into the desired shaped rings by use of a specialized set of tools that decides the shape of each individual ring. The individual rings are annealed to ensure that there are no breaks in the links. The fire scale is removed by …
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Conveyor Chains and Conveyor Systems – Efficient Carriers
The wings of science and technology are stretching which are sheltering many industries. The advancement has generously offered ease and convenience in every sector that have Indonesia Garment Manufacturers greatly benefited many tedious and time-consuming tasks. There are many things which are beyond human capabilities and if tried will not be able with efficiency and accuracy.
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Manufacturing industries are benefiting lot with the development which is brought in by science and the introduction of conveyor chains have contributed to Manufacturing System the continuous commutation of material with the consistent speed. These chains are with the aim to drive the conveyor system using power transmission.
The materials required different speed for transportation and also there are specific requirements for every materials. There are variety of chains which can be chosen from including hollow pin chains, self lube chain and slant bent chains. Used in transportation of materials and produced with varying specifications, the conveyor chains are made using different materials like blocks which can be either solid or laminated. Pins and side plates are used for linkage between chains. Deep plates are also used so that more quantity can be transported. The smooth and consistent pace is due the perfect sync of the slots present in the chains with the sprockets having number of teeth that enable chain to move. In some conveyor systems the sprockets may be driven from one side while for circuitous lines they might have teeth on both the sides are driven from both side.
The parts of the chain conveyor like sprockets, pins, rollers and sleeves are made using various materials like carbon steel, stainless steel and plastic. The choice of material totally depends upon the type of applications. The chain conveyors used in bakery operations have to face high degree of heat, while the environment is totally opposite in freezing plants.
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The application of conveyor systems can be found everywhere from manufacturing units to grocery stores. These systems are cost effective to way to make the movement of the materials fast and efficient which otherwise have eaten many hours when performed engaging manpower. Bucket elevator, chain conveyor, screw conveyor etc are most common type of conveyor systems which are widely used in industries like mining, food processing, sewage treatment, timber harvesting and material handling etc.
If is about the transportation of loose grains, ores and liquids then the usage of bucket elevator is apt. While screw conveyors are used to displace liquids from one place to other which are not possible through bucket elevator. Screw conveyors are compact can be housed at place where space is limited and thus can be conveniently used.…