Our company's corrosion-resistant DTH Hammer was successfully tested at the BAOWU Iron Mine in Anhui Province. It has a service life of 2,700 meters, which is 2.7 times that of our competitors (1,000 meters). The drilling speed is 10% higher than that of competitors, and it has been well received by customers.
1. Working condition information
Construction method: The designed mining scale is 5 million t/a, with geological reserves of 199 million tons. It adopts underground mining and vertical shaft development. The mining method is staged open-pit mining followed by backfilling. The annual output of iron ore concentrate is 1.74 million tons.
2. User pain points
The terminal construction adopts a wet dust removal method (clean water enters the drill pipe → DTH hammer → drill bit through compressed air), and the dust is suppressed by injecting a large amount of water. The excessive amount of water injected during the drilling process results in a lack of oil lubrication inside the DTH hammer, and the parts are severely corroded. The life of conventional DTH hammer is extremely short. The life of competing DTH hammer is 1,000 meters , and the cost of use is too high. Users need to improve the current situation and increase the service life of the DTH hammer.
3. Analysis of failed competitor products
After disassembling and analyzing the failed DTH hammer of a competitor, it was found that all the parts of the DTH hammer were rusted. After testing the dimensions of the piston, cylinder and outer sleeve, it was found that the gap between the piston and the outer sleeve exceeded 0.25, and the gap between the piston and the cylinder exceeded 0.25.
After tracking the site, it was found that a large amount of water was injected into the compressed air during drilling at the construction site, resulting in insufficient lubrication of the DTH hammer. The large amount of water caused the DTH hammer parts to rust, causing the DTH hammer parts to wear too quickly. Ultimately, the clearance between the parts was too large, causing failure.
4. Our solutions
Hammer and drill bit selection. To address customer needs and address the end-use operating conditions and construction methods, we recommend the GM60 corrosion-resistant DTH hammer, paired with the GM60-165 flat drill bit. The corrosion-resistant DTH hammer primarily utilizes a special corrosion-resistant treatment (nitriding) on the surfaces of components such as the piston, cylinder, valve seat, guide sleeve, and outer sleeve. This treatment, after salt spray testing, demonstrates over five times the rust resistance of the components.
5. The use of our corrosion-resistant DTH hammer
DTH hammer drilling speed. We tracked the entire testing process from start to finish, comparing the per-hole drilling time of our company and competitors. The average per-hole drilling time for competitors' DTH hammers was 240 minutes, while ours averaged 216 minutes, representing a 10% improvement in drilling speed.
DTH hammer service life: Our corrosion-resistant DTH hammer has a lifespan of 2,700 meters, while the competitor's DTH hammer has a lifespan of 1,000 meters. This makes our corrosion-resistant DTH hammer 's lifespan 2.7 times longer than that of the competitor.
6. Conclusion on the use of DTH hammer
Our corrosion-resistant GM60 DTH hammer has a service life of 2,700 meters, 2.7 times longer than competing DTH hammer. Its drilling speed is 10% higher than competing DTH hammers.
Our corrosion-resistant DTH hammer has significant advantages in working conditions with large water injection volume and insufficient lubrication of the DTH hammer.
About Us
As a global supplier of DTH Hammer Bits and Hammers, Luoyang Golden Egret Geotools co., Ltd. continues to invest in research and development and is committed to providing customers with high-reliability, low-energy consumption products. Besides that, we can also privide the Rock Drilling Tools, Coal Mining Tools, Construction Tools, Wear and Crushing Tools and Rotary Drilling Tools for the customers around the world.