Long-term use in mine production of lead acid miner's lamp lighting, currently still dominant, but the use of the following disadvantages: (1) Since the miner's lamp is a mixture of sulfuric acid and distilled water, a chemical is reacted with lead by adding a current to generate an electric current to cause the miner's lamp to emit light. Therefore, in the initial charging and daily charging, the acid and water cooperation must be strictly configured according to the instructions of the miner's lamp. If there is a little operation, the miner's lamp can not be used normally, and the service life of the miner's lamp can be shortened. In the use, because the ratio of sulfuric acid and distilled water needs to be adjusted frequently, it is required to be professionally responsible for maintenance and maintenance, and a large amount of manpower and material resources are required. (2) In use, there are often leakage acid, burnt clothes, corrosion of the terminal by sulfuric acid, frequent contact failure, failure to properly charge, use, etc., resulting in increased workload of maintenance personnel. (3) Because of the strong volatility and toxicity of sulfuric acid, it is very harmful to the human body in the initial charging and daily charging. The lighter will cause the human hair to fall off, the face, the hand peeling, the spotting, the red spot, the crack Wait, the heavy one will cause pregnant women to have a stillbirth. (4) The miner's lamp needs to be centrally managed. There must be a special place for charging and repairing the miner's lamp holder and other ancillary facilities charged by the miner's lamp. Therefore, the initial investment is also quite large. A 100-inch miner's lamp holder needs 6-7 thousand yuan. A coal mine with 1,000 people entering the well will only need 60-70,000 yuan, and various maintenance costs and annual investment will be considerable. (5) lead-acid miner weight of about 1.6Kg, 2.8 times by weight of lithium lamp. Add extra weight to everyday users. (6) The service life of lead-acid lamps is generally designed to be 11 hours per day and 500 cycles can be used. However, in actual use, generally only 400 cycles can be achieved. The service life is 30% of the lithium miner's lamp. (7) The illumination of the miner's lamp is low. Generally, the illumination of the new lamp is ≥ 22LX, and the illumination of the lamp of the lithium battery is ≥ 800LX. (8) Since the manufacturer of the miner's lamp did not implement the old miner's lamp recycling system, the old miner's lamp after use was very polluting to the environment. (9) Advantages. Due to the low design and production cost, the miner's lamp is relatively cheap. 2. Comparison of lithium battery miner's lamp and lead-acid lamp The lithium battery miner's lamp is a newly developed product that overcomes all the shortcomings of lead-acid lamps. With its advanced design, safety and reliability of use, it is gradually being promoted and used in mine production. The disadvantage is that the price of lithium miner's lamp is relatively high, and the price of each miner's lamp is about 240 yuan. 3. Use of lithium battery miner's lamp Lithium battery miner's lamp has been put into use in some mines, and the effect is good. The main performances are as follows: (1) Security. The overall sealing design, electronic short circuit protection, automatic power off of the lamp head, anti-static shell, to prevent the generation of static electricity. (2) Reliability. The high-strength housing and optimized structural design allow the product's outer casing to withstand strong impact and enhance explosion-proof performance. The overcharge and overdischarge protection of the lithium battery further enhances the reliability of the product. (3) Convenience. Small size, light weight, easy to carry, maintenance-free, easy to charge, only 220V AC power supply, no centralized charging management. (4) High efficiency. The illuminance of light is ≥2800LX, the working time is ≥13.5h, and the service life is ≥1200 cycles. (5) Economics. The service life is 2-4 times longer than lead-acid lamps, and the maintenance cost is reduced, and the initial investment of charging is less. The use of lithium battery miner's lamp not only reduces the maintenance personnel of the miner's lamp, but also saves the cost of the miner's lamp maintenance and the special facilities for charging the miner's lamp. At the same time, it has reduced the load of the field workers and has been welcomed and praised by the site management personnel and users. Although the purchase price of miner's lamp is relatively high, it should be vigorously promoted due to its extremely low operating cost and high efficiency and environmental protection.
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1. Current status of coal ore lamps used