This machine is an optimized design based on the original compound pendulum jaw crusher, tailored to the strict requirements of fine chemical processes for high purity and contamination resistance. Both the movable and fixed jaws are lined with corundum ceramic liners, and the sides of the crushing chamber are equipped with corundum ceramic plates. The body and related components are made of high-quality stainless steel, enhancing the equipment's wear resistance and ensuring **no contamination** of the materials. With excellent craftsmanship and an aesthetically pleasing overall design, it can be used as a coarse crusher before an air jet mill.