Aluminum Polishing Sheet is a special Aluminum Sheet.Its surface has been polished hence gives good performance in surface condition.The advantage of aluminum sheet is as follows:
1. Easy to process.
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The results show that the casting aluminum alloy with good casting property or deformation aluminum alloy with good processing plasticity can be obtained by adding certain Ba Au Du element.
2. Good conductivity and thermal conductivity.
The electrical and thermal conductivity of aluminum is second only to silver, copper and gold.
3. The density is small.
The density of aluminum and aluminum alloy is close to 2.7 g / about 1 / 3 of that of iron or copper.
4. High strength.
The strength of aluminum and aluminum alloy is high. The matrix strength can be strengthened by cold working to a certain extent, and some brands of aluminum alloy can also be strengthened by heat treatment.
5. Good corrosion resistance.
The surface of aluminum is easy to produce a dense and firm protective film of Al2O3, which can protect the substrate from corrosion.
Starting from the layered roadway, there are electric mining methods (using gas-legged rock drills and electric picks) and non-track equipment mining methods (using electro-hydraulic drilling rig rock drilling, charging vehicle charging, diesel or electric shipping) Equipment) two.
The echelon mining method has a general height of 2.5m, an access width of 3 to 4m, a high approach of 4×4m, and an access length of 25 to 30m. The rock drilling machine for rock drilling has a hole depth of 1.5 to 2 m, and each working face is mined 50 to 80 tons per cycle, and is discharged with 15 to 30 kw. After the intake is completed, the crushed ore of the bottom plate should be flattened by artificially matching the electric raft, and the thickness of the crushed ore is generally 0.2-0.3 m before the filling preparation work can be performed.
The layering height of the mining method of the trackless equipment is generally 3.5 to 4 m, the width is 3.5 to 5 m, and the length of the approach is 30 to 50 m. The rig is drilled with a single arm or both arms, and the hole depth is 3 to 3.5 m. Each working surface can mine 120-180t per cycle. The diesel or electric scraper with a bucket volume of 2 to 3.5 m 3 is mined and can be equipped with a service vehicle such as a charging cart.
The key to the down-stratified filling method is that the first layer to the second layer must form a complete false roof to ensure the safety of the lower mining.