BACKGROUND

Our customer, Miyun Iron Ore, has two sets of PE 900*1200 jaw crushers. The two-sets jaw crusher needs to crush 2.2 million tons of iron ore. However, there are some questions:

1. Maintenance time is too long, every one and a half months need regular maintenance, each maintenance needs 48 hours. Maintenance item: rotate the jaw plates；
2. Every 3 months, all used jaw plates need change;
3. Every year, Miyun Iron Ore need more than 32 tons of jaw plates and 3.5 tons of other jaw crusher parts;

CHALLENGES

Miyun Iron Ore asks our foundry to improve this PE 900*1200 jaw crusher plates working life and decrease maintenance time.

SOLUTION

After a check with the customer engineers and analysis of the used jaw plates. Our engineers put forward the following improvement measures：

1. Changing the tooth profile. Change triangular tooth to trapezoid tooth;
2. Add 5mm tooth peak, and decrease 5mm tooth bottom;
3. Material change. Change Mn13Cr2 to Mn18Cr2. Which will increase the hardness of these jaw plates.

PERFORMANCE & RESULTS

Through a series of adjustments by our engineers, the new jaw plates work more than 6 months, which is double than the old ones.