Grinding rods are used as grinding media in rod mills. During the service process, the regularly arranged grinding rods work in a cascaded manner. The grinding rods make the minerals in the gaps grind to qualified by impact and squeezing with the size reduced. When rods be attrited to specified size,it will be taken out of the mill.During the operation, if the toughness is insufficient, the rods is likely to break due to frequent impact.Once the broken rod occurs, the regular order of rods in mill is changed, then cause more broken rods. Therefore, the occurrence of broken rods not only seriously affects the grinding efficiency, but also causes damage to the equipment even shut down, and affecting the normal production.
The production of grinding rods is usually heated by medium frequency induction. At present, the commonly materials for rods are40Cr and 42CrMo, which mainly used mold steel, It has good toughness and uneasy to break. However, for large-sized grinding rods, the hardening layer is very shallow, only 8- 10mm. The wear resistance is poor,just like 65 Mn steel. Japanese scholars have proposed the material of high carbon steel as wear-resistant steel, which has a good effect, but it is strict on the production process, and high carbon steel is prone to metallurgical defects. For less rod material type, Goldpro has developed a new type of steel for grinding rod and matching heat treatment process to ensure the grinding rod with higher toughness and deeper hardened layer. Now,Goldpro’s rods are used in many mines and no broken.The wear rate was low and the grinding effect was remarkable.
Strictly implement the ISO9001:2008 system, and established a sound product management and control system, product quality testing system and product trace system.
With international authoritative quality testing equipment, the testing specifications are qualified with the CNAS (China National Accreditation Service for Conformity Assessment) certification system;
The testing standards are fully calibrated with SGS (Universal Standards), Silver Lake (US Silver Lake), and Ude Santiago Chile (University of Santiago, Chile) laboratories.
Three “entire” concept
Three“ entire” concept includes:
Entire quality management, entire process quality management and entire participation in quality management.
Entire quality management:
Quality management is embodied in all aspects. Quality management not only includes product quality, but also needs to consider factors such as cost, delivery time and service. This is the significant entire quality management.
Entire process quality management:
Without a process, there is no result. Entire process quality management requires us to focus on every aspect of the value chain to ensure the quality results.
Entire participation in quality management:
Quality management is everyone’s responsibility. Everyone must pay attention to product quality, find problems from their own work, and improve them, to take responsible for the work quality.
Four” everything” concept
The four “everything” quality concept includes:everything for customers, everything based on prevention, Everything speaks with data, everything works with PDCA cycle.
everything for customers. We must pay more attention to customers’ requirements and standards and establish the concept of customer first;
Everything is based on prevention. We are required to establish a concept of prevention-oriented, prevent problems before they occur, and eliminate the problem in its infancy;
Everything speaks with data. We should count and analyze data to trace the roots to find the essence of the problem;
Everything works with PDCA cycle. We should keep improving ourselves and use system thinking to achieve continuous improvement.