Two, YQJ-8 type pressure dome structure and working principle: YQJ-8 type hydraulic pressure ball machine protection device is composed of a high-pressure pump oil into the cylinder, the piston axial displacement. The former head of the piston rod connected to the bearing housing pressure to meet production requirements. When the intake pressure roller between the two materials into the metal block excessive or hydraulic cylinder rod pressure overload Coke did not pressure the ball machine, hydraulic pumps will be shut down, the accumulator pressure change dampening effect, turn back to the oil spill , so that the pressure piston displacement increase the gap between the rolls so hard object by the pressure roller, the system pressure back to normal, you can protect the pressure roller is not damaged. You can adjust the pressure according to pressure the ball density requirements and production flexibility of coal briquetting machine briquette production process classified information - thermoforming definition: Non-coking bituminous coal (such as gas coal, weakly caking coal, etc.) in the rapid heating Under the conditions of adhesion can be greatly improved when the plastic is heated to a temperature within the range of hot pressing, molding can be depressed, this molding method is called thermoforming. Thermoforming method does not require additional other binders alone coal itself adhesion and molding, can save a lot of trouble to add a binder to bring. Practice has proved that this was the method of forming a coke or coal mechanical strength of the high pressure ball machine, only to meet the requirements of the ammonia industry, but is also suitable for small, medium and even large-scale blast furnace used in lieu of metallurgical coke for fuel. Currently supply pressure ball machine, some of China's small and medium sized steel mills, calcium magnesium phosphate fertilizer plant is vigorously shaping the development of this method. From the development direction, the process has a broad development prospects. Thus, hot press molding method of molding the pulverized coal is also an important aspect. Thermoforming methods, can be obtained: ● single coal as raw material coke; ● smelting as the main hot pellet; ● with anthracite coal as the main hot; Features: ● by coal itself adhesion and molding, without additional adhesive to ensure carbon content. ● prepared cold coke or coal, high thermal strength, waterproof. Applications: meet the requirements of ammonia industry; also suitable for small and medium as well as large-scale blast furnace use, instead of metallurgical coke as fuel. Coke did not pressure the ball machine | Zhengzhou-mao Machinery (certified) | ball press machine provided by the Zhengzhou City-mao Machinery Manufacturing Company Limited. Zhengzhou City-mao Machinery Manufacturing Co., Ltd. (www.gmjxzz.com) is a leader in Zhengzhou, industry-specific equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Zhengzhou Light Mau leader in mechanical staff warmly welcome all inquiries negotiations to create a light-mao Machinery Zhengzhou a better future.