1. Raw material control: Main raw material of ferroalloy kind is selected via inviting tender, and it is checked, accepted and processed according to Raw Material and Processing Standard, at the same time it is piled up after being classified and labeled. 

2. Smelting control: Intermediate frequency electric furnace is adopted in process of smelting and strict smelting process control is taken to reduce gas, oxide inclusion, slag in the alloy effectively and prevent emerging of all kinds of casting defects.

3. Chemical composition control: According to different work conditions and customers’ demands, different material formulas are selected for grinding medium in process of production to control chemical composition under the best range; trace elements of rare earth or boron and vanadium etc. are used as modificator and product toughness, hardness and the phase transition temperature point of heat treatment are adjusted to make product quality reach the best condition.

4. Forming control: Firstly chilling process is adopted to make casting ball grain more refined and its structure more compact with good toughness and abrasion resistance. Secondly partial hardening process- hardening treatment is undertaken for parts of grinding ball that need to bear impact and abrade. To make internal structure grain product is more refined, compacted and carbide containing chromium in radiated arrangement; hard layer is constantly formed in process of milling, which improves product toughness and hardness. 

5. Heat treatment control: Firstly our factory adopts large automatic oil quenching production line to make products be heated evenly in the heating process and product hardness in uniformity after undertaking quenching process to achieve matrix structure and metallographic standards that we need; Secondly optimized heat treatment process is adopted to eliminate stress generated in process of casting and quenching upmost to ensure product to reach the required quality standards during usage period.

6. Quality Management System Standard ISO9001:2008 is strictly implemented at aspect of quality assurance control; all kinds of quality control standards and process documents are established and improved; quality assurance system is further improved and a full-time quality inspector is designated to supervise each process from raw materials’ entering the plant to products’ outgoing; quality inspection system consisting of plant self-check, quality inspection department casual check and lab final check is set up; one ticket veto system is implemented in product quality and new products and brands are continuously created by our company.