01 Make Grinding Balls


Iron grinding sand production line is widely used in the production of ball with diameters from 30mm to 150mm. The whole production line has a high degree of automation, with annual output from 5000 tons to 15000 tons. This is another efficient way to manufacture grinding media balls.

This line uses the sand coated metal mold process and is widely used to produce small and medium sized castings such as chromium ball grinding medium(grinding ball), crankshaft, brake drum, wheel hub, casting ball, casting joint, water meter shell, engine cylinder cover and so on.

This production machine can realize remote maintenance and remote fault diagnosis function. Molding line operators are mainly responsible for pouring,auxiliary cleaning, monitoring, core setting and other work.

It consists of three main parts: the molding line, the tilting gating system and the metal mold.
Production Line
  • Quenching production line

  • DISA production line

  • DISA production line

  • DISA production line

Pouring System

Our company uses the advanced inclined casting system as the casting machine.

Casting machine is simple to operate, the operator only needs to press the button to complete the whole process. The whole set of equipment is safe and energy-saving, with a separate operating room for the staff to use, thus eliminating the risk of operation for workers.
02 Separate & Clean


After wear-resistant ball gets cool, our company adopts automatic ball separation and sorting machine to clean, separate, and transport the sand. Each process works independently. With the help of PLC program, according to different ball size, we will set different working data program. All equipment is equipped with sound insulation board and dust removal machine. The working environment is much improved compared with the traditional factory.

This machine is usually built underground, so as to eliminate noise and dust. After the wear-resistant ball molding, the operator will be the whole forming of the ball, gate, riser thrown to the feed port, and then from different tunnels out of the ball, runner and sand.
03 Heat Treatment
After separating and cleaning the grinding ball, heat treatment is needed. However, due to the different chromium content, the heat treatment process is also different.

Types of Heat Treatment Process

For high chromium balls containing more than 10% chromium, it is necessary to quench and then temper them. For large low chromium balls with less than 10% chromium content, tempering is required. (The specific process depends on the customer's heat treatment process)

In addition, there are three quenching methods: water quenching, oil quenching and gas quenching. For grinding balls, the latter two methods are the best. In addition, gas quenching is more suitable than oil quenching for ultra-high chromium spheres. However, oil quenching is most suitable for mills with chromium content between 10 and 18%.

Quenching process: First, the grinding ball is heated to a certain degree within a specific time, and then it is directly quenched in oil or air for several minutes.

Tempering process: the quenched grinding ball is heated to a certain extent for a period of time.


Brief Introduction

Push-rod heat treatment is the most popular equipment in grinding medium heat treatment process, because it is not only flexible, but also very energy saving. The daily output of ordinary high chromium grinding medium ranges from 10 tons to 30 tons. The whole conditioning process requires only two operators.

The machine is controlled by PLC and the operator can modify the temperature of each section by touching screen according to the process requirements. The ball heating and hardening process is fully automatic. The machine is equipped with an alarm system, which can clearly tell the operator the working cycle and machine failure information.

Working Process

Quenching part: grinding ball - grinding ball into the furnace - preheating - heating - insulation - pushing ball out - quenching (oil or gas) - grinding ball

Tempering part: ball loading (original or quenched)- Push the ball into the furnace - heating - push the ball out – packaging

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Lab Test


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