Nanjing chemical factory, mainly for paper surface whitening agent, purchased a large mixer to combine batches, a batch of 7 tons of mixed materials, after communication decided to make 20 cubic meters of double cone large combined batch machine. Because of the large shape, the design capability and processing capability of the manufacturer were very high. The difficulties in the manufacturing process also greatly exceeded our expectation. After two months' hard work, the equipment was delivered on schedule, installed and tested at the customer's site, and successfully handed over the key. Through the processing and manufacturing of this giant equipment, our processing ability has been newly improved, and we also see our Zheke people, toughness and unity.