Anhui Ningguo Zhongrui Wear-resistant Materials Co., Ltd.

Recently, the Casing Chromium Hammer, a new generation of core components for wear-resistant crushing, from Anhui Ningguo Zhongrui Wear-resistant Materials Co., Ltd., has been launched. Relying on core processes such as precision casting and dual-metal liquid-liquid compounding, it has overcome the long-standing industry problems of "inability to balance wear resistance and toughness, prone to cracking, short lifespan, and high downtime losses" for traditional crushing machine hammers. It provides a new solution for cost reduction and efficiency improvement in heavy industrial sectors such as mining quarrying, sand and gravel production, cement and building materials, metallurgical separation, and construction waste resource utilization. 1. Directly address industry core pain points and anchor product development direction In the hammer-type crushing machine, impactor, impactor-type crushing machine, and sand-making machine complete crushing systems, the hammer head is a high-frequency loss and wear-prone component. The mainstream high-manganese single-material hammer heads in the market generally have two major shortcomings: high-toughness materials wear out quickly, requiring frequent disassembly and replacement; high-hardness wear-resistant materials have insufficient impact resistance, and are prone to fracture and breakage under the impact of granite, basalt, iron ore, etc., high-hardness materials. This not only significantly increases the cost of parts procurement but also directly reduces the effective production capacity of the entire production line, becoming a major constraint for sandstone processing plants and mining enterprises in operation management. The technical team of Zhongrui Casting has been deeply engaged in wear-resistant casting for over a decade. They have visited over 100 crushing processing terminal enterprises across the country and conducted thousands of formula and process tests for different crushing conditions, material hardness, and equipment models. Finally, this high-performance casting chromium alloy hammer head was developed. It balances wear resistance and impact resistance from the material's fundamental logic. 2. Hardcore technology support, building product core competitiveness 1. Select high-chromium alloy substrate, with full mechanical performance The newly released casting chromium alloy hammer head adopts the Cr15/Cr20/Cr26 series high-chromium cast iron as the core wear-resistant base material. It precisely mixes chromium, molybdenum, vanadium, titanium, rare earth and other strengthening alloy elements. After professional quenching and reheat treatment, the working surface has a Rockwell hardness of **HRC62-65**, with uniformly dispersed carbides inside, and its wear resistance far exceeds that of conventional high-manganese steel castings. It remains durable even under high-silicon quartzite, hard basalt, and metal ore impacts. For heavy-load impact conditions, the company recommends the **dual liquid dual metal composite casting version**: The impact wear surface is high-chromium wear-resistant alloy, and the hammer handle connection part uses high-toughness low-alloy cast steel. The two metals achieve seamless metallurgical fusion in the molten state, not simply mechanical connection. This ensures extremely strong wear resistance in the impact area and eliminates the risk of the hammer handle breaking or falling off, significantly improving impact toughness, and completely resolving the "hard but fragile" material contradiction. 2. Precise casting throughout the process, strictly controlling factory quality The product is formed using the vacuum precision casting process of lost mold. The mold size is highly accurate, and the internal structure of the castings is dense, without casting defects such as cavities, pores, or porosity. Each finished product undergoes three quality control checkpoints: dynamic balance correction, non-destructive testing, and hardness inspection. After installation, the rotor of the crushing machine runs smoothly, reducing additional wear on the bearings and casing, and extending the overall machine lifespan. It is compatible with various domestic and imported hammer crushers, impact crushers, and vertical sand-making machines. 3. Wide application in multiple scenarios, creating tangible economic benefits for customers 1. Sandstone and gravel processing industry: Suitable for river pebbles, granite, limestone, and syenite crushing and sand-making, improving the sand-making rate and the regularity of gravel particle size, with a lifespan 2-4 times longer than traditional high-manganese steel hammer heads, reducing the frequency of equipment shutdown and replacement;2. Mining and metallurgical separation field: Used for iron ore, non-ferrous metal ores, slag coarse crushing and medium-fine crushing, resisting high-intensity impacts and wear from the ore;3. Cement building materials and solid waste treatment: Applied in scenarios such as cement clinker, coal gangue, construction waste, and concrete block crushing, suitable for long-term continuous industrial production;4. Road infrastructure projects: The mobile crushing station is equipped with dedicated hammers, providing stronger stability in complex field conditions and making operation and maintenance more convenient. According to the feedback from the first batch of trial users, after replacing the chromium alloy hammers from Zhongrui Casting Industry, the monthly component replacement frequency of each crusher decreased by more than 70%, the effective operation time of the production line significantly increased, and the overall material and labor maintenance costs were reduced by over 35%. The long-term investment advantage is particularly prominent. Four. Adhere to meticulous manufacturing, continuously deepen the field of wear-resistant materials Anhui Ningguo Zhongrui Wear-resistant Materials Co., Ltd. is located in the industrial cluster of wear-resistant castings in Ningguo City. It has a standardized steel structure production plant, a complete set of automated melting and casting production lines, and a complete physical and chemical testing laboratory. It focuses on the research, production and sales of high-chrome hammers, liners, grinding pit walls, and wear-resistant steel balls for mining engineering machinery. This upgrade and iteration of the chromium alloy hammers is an important milestone for the company to drive product upgrades through technological innovation. In the future, Zhongrui Casting Industry will continue to focus on the specialized market of heavy industry wear-resistant materials, continuously optimize alloy formulas, casting processes and heat treatment systems, and with higher performance, more stable quality and more comprehensive customized services, help the domestic crushing equipment industry achieve high-quality development and safeguard the cost reduction and efficiency improvement of industrial and mining manufacturing enterprises.

Recently, the Zhongrui Wear-resistant Materials Co., Ltd. in Ningguo City, Anhui Province, completed a comprehensive technical upgrade for the Casting Ball Mill Liner series. Leveraging multi-gradient alloy formulations, dual-metallic casting processes, and an intelligent closed-loop heat treatment system, the new ball mill casting liners effectively address industry pain points such as rapid wear, easy fracture, poor fit, low grinding efficiency, and frequent downtime for maintenance in the mining, cement, power generation, solid waste resource utilization, and non-metallic mineral processing core application fields. 1. Directly address core pain points of ball mill equipment and tackle industry challenges The ball mill liner is the core protective component of the ball mill cylinder and end cover. It not only isolates the direct impact and abrasion of grinding steel balls and mineral materials on the equipment shell but also optimizes the steel ball trajectory through the rib structure, directly determining the grinding capacity, output particle size, and overall machine lifespan.Currently, the mainstream high-manganese single liner products have significant shortcomings: insufficient surface hardening in light wear conditions and rapid wear consumption; insufficient toughness in heavy-load and strong-impact scenarios, prone to cracking, chipping, and large-scale peeling; ordinary casting liner molds have poor precision and large gaps with the cylinder, causing severe vibration during operation, which not only damages core transmission components such as bearings and reducers but also requires long production line shutdowns, thereby increasing overall operational costs of consumables, labor, and energy consumption.The technical team of Zhongrui Casting has been deeply engaged in wear-resistant casting for over a decade. They have iteratively tested in thousands of on-site conditions, from material formulations, casting processes, structural mechanical design, to heat treatment processes, to create a new generation of casting ball mill liners that offer ultra-high wear resistance and impact toughness, while maintaining high performance and cost-effectiveness. 2. Three core technological advantages, building product core competitiveness 1. Graded alloy material system, precise matching for all working conditions The company offers three mainstream casting liner material series for different grinding loads, covering the vast majority of industrial grinding scenarios: 1. High-chromium cast iron linerUsing Cr15, Cr20, and Cr26 high-chromium wear-resistant cast iron substrates, precisely matching alloy strengthening elements such as molybdenum, vanadium, manganese, and rare earth, after quenching and reheat treatment, the working surface hardness can reach HRC 60–65, with a carbonitride dispersion in the metallographic structure, with an anti-grinding particle wear ability 2–4 times that of conventional high-manganese steel liners, suitable for high-load continuous grinding in iron ore, non-ferrous metal beneficiation, cement clinker, etc.; the heavy-load impact version adopts the **dual liquid dual-metallic casting process**, with a high-chromium wear-resistant layer on the working surface and a high-toughness alloy steel base, integrated metallurgical fusion, eliminating the risks of cracking, chipping, and large-scale peeling from the root cause.2. High-manganese steel wear-resistant linerSelecting Mn13Cr2 and Mn18Cr2 austenitic high-manganese steel materials, the surface layer quickly hardens after impact, with excellent impact toughness, targeting large-particle material coarse crushing and strong-impact semi-autogenous grinding machine operation scenarios, with outstanding cost-effectiveness.3. Medium-chromium alloy steel linerBalancing wear resistance and production cost, with stronger corrosion resistance, mostly used in power plant fly ash desulfurization, coal gangue grinding, construction waste solid waste treatment, etc., for medium wear conditions. 2. Precision casting + structural optimization, double improvement in installation compatibility and grinding efficiency The product is formed using the vacuum precision casting process of the disappearing mold, with a dense internal structure, free from casting defects such as air holes, shrinkage cavities, and sand eyes; Based on three-dimensional modeling reverse mapping, it strictly matches the arc shape of various ball mill cylinders, the installation holes of the flanges are precise, the gap between the liner and the inner wall of the cylinder is extremely small, the running vibration amplitude is significantly reduced, and the service life of the entire transmission system of the mill is prolonged.At the same time, according to customer requirements, custom wave-shaped liners, stepped liners, grading lifting strip liners, end cover liners, discharge篦 plates， etc. with various shapes can be provided. The height of steel ball lifting and the rolling path are optimized， the impact crushing and grinding effect of the materials is enhanced， the uniformity of powder discharge is improved， and the unit power consumption of the mill is reduced.3. Strict quality inspection throughout the process， stable and controllable quality Each batch of cast ball mill liners undergoes four factory inspections： material spectral composition analysis， Rockwell hardness sampling test， impact toughness mechanical test， and full inspection of appearance dimensions； for large-sized products， additional non-destructive testing for internal hidden defects is added. All products can be customized according to the customer's mill model， installation dimensions， and material conditions， and can be adapted to various domestic and imported ball mill equipment of different specifications.

Recently, Zhongrui Wear-resistant Materials Co., Ltd. in Ningguo City, Anhui Province, completed the technological iteration and upgrade of the Grinding Ball product. Relying on a mature high-chromium alloy formula, fully automated heat treatment, and lost-mold precision casting technology, it provides high-maintenance, low-breakage rate, and high-grinding efficiency core grinding media for ball mill systems in industries such as mining beneficiation, cement and building materials, thermal power generation, chemical powder processing, and non-metallic mineral deep processing, effectively addressing industry pain points such as high steel ball loss, frequent ball breakage, high operating load of the mill, and high production costs. 1. Deeply explore the pain points in the grinding industry and optimize product development directionally The steel balls used in ball mills, as the core wear-prone components in the powder crushing process, directly determine the production capacity, energy consumption, and operation and maintenance costs of the entire grinding line. Currently, the market's conventional carbon steel balls and low-chromium steel balls have three major shortcomings: insufficient hardness, rapid wear, and frequent replacement; poor impact toughness, prone to cracking and fragmentation under heavy-load operation in large-diameter ball mills, resulting in debris; large roundness deviation leading to reduced grinding efficiency and blockage of classification equipment, and exacerbating abnormal wear of liners. The technical team of Zhongrui Casting has been deeply engaged in the field of wear-resistant castings for many years. They conducted repeated experiments on hundreds of on-site conditions such as dry and wet grinding, dry and wet ores, high-temperature conditions, and large and small ball mills. They optimized the entire process from alloy composition ratio, casting, and quenching and tempering to launch a new generation of high-performance cast grinding steel balls, achieving a balanced breakthrough in wear resistance, impact toughness, and roundness accuracy. 2. Hardcore technology support, creating a core competitive advantage for steel balls 1. Multi-material gradient formula, suitable for different working conditions The upgraded Grinding Ball is divided into three main series, covering all scenarios: 1. High-chromium alloy cast steel balls: Cr10–Cr28 high-chromium cast iron substrate, modified with elements such as molybdenum, manganese, vanadium, and rare earth; after heat treatment, the surface hardness can reach HRC 58–65, with a dense metallographic structure, extremely strong anti-corrosion and anti-wear capabilities, suitable for high-load continuous operation scenarios in iron ore, non-ferrous metal beneficiation, cement plant raw material and clinker grinding, etc.;2. Medium-chromium wear-resistant steel balls: A cost-effective preferred solution, balancing hardness and toughness, with an extremely low breakage rate, mostly used for limestone, coal gangue, and power plant fly ash desulfurization grinding;3. Low-chromium alloy steel balls: An economical general model, suitable for small-scale beneficiation plants, building materials auxiliary materials, and coarse grinding processes in non-metallic mineral processing, significantly reducing initial material costs. 2. Automated precision casting + closed-loop heat treatment, strictly controlling product stability The product adopts fully automated sand casting / lost-mold vacuum pouring molding, with round and regular steel balls, minimal elliptical error, ensuring uniform force distribution in the ball mill interior; the entire production line is equipped with an intelligent temperature-controlled quenching and tempering assembly line, with a reasonable internal hardness gradient, avoiding batch cracking caused by brittle exterior and hard interior. Each batch of steel balls undergoes four quality inspections: drop ball impact fatigue test, hardness inspection, metallographic analysis, and breakage rate detection. The breakage rate can be controlled within 0.3%, far exceeding industry standard requirements. Specifications can be customized according to customer needs, covering all regular sizes from Φ20mm to Φ150mm, perfectly matching horizontal ball mills, vertical mills, semi-autogenous mills, and rod mills, etc. 3. Direct cost reduction and efficiency improvement, creating practical value for downstream enterprises After field tests and comparisons by multiple mining and building materials enterprises: After replacing with Zhongrui high-chromium grinding steel balls, the unit steel ball consumption per ton of output in the mill decreased by 30%–50%, the amount of debris removal was significantly reduced, and the service life of the mill liners was simultaneously extended; The grinding material fineness has been made more uniform, improving the quality of subsequent flotation, separation, and finished powder. The overall costs of electricity consumption, manual maintenance, and consumable procurement have decreased by over 25% in total. The long-term economic benefits are remarkable.