Sichuan Province has the largest gold mine ever discovered in the province, which is located at the top of a mountain at an altitude of 4,200 metres above sea level. The environment is harsh, with oxygen levels in the air at only 60 per cent of those found on the plains, posing a great challenge to operators. Despite the harsh weather conditions, mining continues at the mine.

The owner decided to improve the technology of the original gold crushing line in order to increase the production capacity of the gold mine and reduce the particle size of grinding. In the competition of many large domestic and foreign brands, Liming Group's technical improvement programme stood out. The original production line adopts "C100+GP11F two-stage and one closed-circuit crushing process, the finished product is -18mm", which has been reformed into "C100+HST160(H1)+HPT300(F2)three-stage and one closed-circuit process, -12mm". This improvement not only enhances the crushing efficiency, but also makes the finished product size finer, which meets the owner's requirement of lowering the grinding size. Liming's technical reform programme fully demonstrates its excellent technical strength and innovation ability, which provides a strong guarantee for the capacity enhancement and efficiency improvement of the gold mine.

After the verification of actual production and operation, the technical reform programme and equipment have performed excellently, which not only achieved the customer's requirement of crushing and screening capacity increase, but also successfully reduced the grinding size, which is fully in line with the customer's expectation. This achievement has won high praise from the customer, which fully proves Liming's professional ability and technical strength in the field of gold ore crushing line technical reform.