Jeddah Chairman Zhu Shunming: Focusing on improving cement quality to support supply side reform
Since 2015, the supply side structural reform with a focus on reducing production capacity, reducing inventory, deleveraging, lowering costs, and filling gaps has been launched in various industries across the country after being set by the Central Economic Work Conference. After years of effort, this reform, which starts from improving the quality of supply, uses reform methods to promote structural adjustment, correct distorted factor allocation, expand effective supply, and promote sustained and healthy economic and social development, has deeply penetrated people's hearts.
Cement, as the foundation of the national economy, plays an irreplaceable role in the construction of urban modernization and is known as the "food for construction". Compared to cement, China's cement industry started relatively late, but has developed rapidly with the efforts of a large number of cement workers. Especially after 2000, the new dry process technology was gradually promoted in China, and the cement industry entered a period of rapid development.
And it was precisely this period of great strides that laid hidden dangers for the overcapacity of cement production in China, which ultimately erupted at a critical time of national economic development and transformation. In 2015, the total net profit of more than 3000 cement enterprises in China was only 32.97 billion yuan, a year-on-year decrease of 58%, and more than half of the enterprises suffered losses. Although there was a significant rebound in 2016, deep-seated problems have not been resolved and crises still exist.
Those who observe the situation are wise, and those who control the situation win. Faced with difficulties, wise people in the cement industry have learned from their mistakes and seized the opportunity of supply side reform to respond to the times. A series of measures such as mergers and reorganizations have been implemented. On August 22, 2016, with the approval of the State Council, China Building Materials Group Co., Ltd. and China National Materials Group Corporation implemented a restructuring. Xiao Yaqing, Director of the State owned Assets Supervision and Administration Commission of the State Council, pointed out that the "two material restructuring" is an important measure to promote supply side structural reform and other strategies.
In addition to reforming the system and management to make cement enterprises more adaptable to new demands, improvements in cement performance have also followed suit. Zhu Shunming, the general manager of Yancheng Jida Machinery Manufacturing Co., Ltd. (referred to as "Yancheng Jida"), once stated at an industry conference that the overall supply of cement production in China exceeds demand, and cement production capacity is becoming increasingly surplus. However, the demand for high-performance cement and high-quality cement in the market is in short supply, which requires cement production enterprises to continuously innovate in technology from the "supply side" and produce the high-performance cement urgently needed by the market.
In June of this year, the "13th Five Year Plan for the Development of the Cement Industry" (referred to as the "Plan") formulated by the China Cement Association was released. According to the "Guiding Opinions on the Development of Building Materials Industry during the 13th Five Year Plan", the "Plan" proposes to phase out composite 32.5 cement and encourage the production and use of 42.5 and above grade cement and pure Portland cement. Based on the current testing mechanism for composite 32.5 cement in China, some have proposed that this move will accelerate the promotion of high-performance cement in the country.
Zhu Shunming introduced that high-performance cement has many advantages: it requires less clinker and reduces enterprise costs; High strength, can significantly improve the concrete grade of prefabricated components, reduce the amount of steel reinforcement or decrease the cross-sectional size of components; Good durability, high compactness of formed concrete, good impermeability, frost resistance, carbonation resistance, and corrosion resistance. The building has a long service life and strong adaptability to external additives, reducing usage.
However, the current cement industry in China does not attach much importance to high-performance cement. The firing process has always been a key focus of attention for enterprises and experts in the industry, and it can be said that significant progress has been made. However, the grinding process has been neglected for a long time, "said Zhu Shunming." This is also one of the reasons why the performance of cement cannot be improved and cannot meet the market's performance requirements. It is gratifying that this situation has improved
During the 9th International Grinding Summit in 2017, guests visited Pizhou Zhonglian, which is one of the model enterprises for technological transformation of Jida in Yancheng. This renovation has significantly reduced the electricity consumption per ton of cement by Zhonglian in Pizhou. Its grinding unit energy consumption is only 21-23 degrees, and the most significant improvement is the enhancement of cement performance. It is understood that due to the superior performance of cement, all major construction projects such as Xuzhou Guanyin Airport are purchased here.
So what is the secret to producing high-performance cement? Zhu Shunming said that this is related to the JD fine powder selection machine produced and manufactured by Yancheng Jida. The grinding equipment can be said to be the key to the successful transformation of the system, and the high-performance powder concentrator is the key among them. It is reported that this process is a double closed circuit internal circulation grinding process before and after rolling and ball milling. The material from the front-end roller press is lifted into the V-shaped powder concentrator, and the coarse material from the V-shaped powder concentrator is re extruded by the roller press. The fine powder is stored in the warehouse, avoiding the phenomenon of over grinding. In addition, the materials ground by the ball mill are sent to another JD high-efficiency internal circulation fine powder sorting machine for sorting through the tail elevator. The fine powder products are selected and stored, while the coarse powder is returned to the ball mill for grinding.
Regarding this hero, Zhu Shunming introduced that the JD Fine Powder Selection Machine is a technological product jointly developed by Yancheng Jida and well-known domestic universities and research institutes based on the introduction of Denmark's Smith high-efficiency powder selection machine technology, using aerodynamic analysis methods. This product integrates the planar vortex classification principle of O-SEPA powder selector and the finished product collection method of cyclone dust removal.
People in the cement industry should have a sense of responsibility to promote the improvement of building quality in our country, "Zhu Shunming often says. The supply side reform of the cement industry not only requires the reform of the industry itself, but also the efforts of equipment enterprises to support the supply side reform.
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