1.3
MINING INDUSTRY PROMOTION CATALOG
Mine electrical equipment
Underground mining
· Underground mining is the main method in China.
Mine exploitation
· The equipment must conform to mine explosion-proof or safety spark type.
Mining industry
Concentrator
Smelter
Opencast mining
Most of foreign countries are opencast mining.
1. Mine flameproof electrical equipment Due to the narrow space of underground production activities, and the existence of a large number of high energy accumulation in the production process, the serious threat of water, fire, gas, coal dust and roof, etc., is very easy to occur gas explosion accidents, coal dust explosion accidents, fire accidents, etc., so the equipment in the key operation area underground is required to meet the mine explosion-proof type. The enclosure of explosion- proof electrical equipment is clearly marked with ‘Ex’. The explosion-proof mark of mine flameproof electrical equipment is ‘ExdI’. 2.Mine general electrical equipment The enclosure is closed, firm, drip proof, splash proof and moisture-proof, and can prevent direct contact with live parts from the outside. There is special junction box and mechanical locking to prevent electrified opening. It can only be used in the places with good ventilation and low risk of gas and coal dust explosion. There is a clear mark ‘KY’ on the enclosure of mine general electrical equipment
09 CHINT
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