On March 16, the "2023 China Cement Industry Summit" held by China Cement Network was successfully concluded in Hangzhou. On that day, the "2022 China Cement Industry TOP100 Award Ceremony" was held together.
(meeting site)
Qi Yanyong mainly shared the distribution of energy consumption in kiln system, optimization of waste heat power generation, carbon reduction, consumption reduction and production increase.
Among them, Qi Yanyong said that the grate cooler is the core of coal saving in the kiln system, and the operation effect of the grate cooler of domestic manufacturers is quite different. The main factor affecting the heat exchange efficiency of the grate cooler is "wind short circuit". If the kiln system wants to achieve the goal of high production and low consumption, it is necessary to improve the heat recovery efficiency of the grate cooler, avoid the phenomenon of "air short circuit" and increase the air volume into the kiln. In the actual production process,
most manufacturers have not found an effective way to improve the temperature of the firing zone, resulting in low quality of rotary kiln and high coal consumption. The temperature of the firing zone is the core of the quality of the rotary kiln. When the temperature of the firing zone is high, the rotary kiln has strong anti-fluctuation ability. Zhu Weiyuan said that ammonia is used to store hydrogen, because ammonia does not contain carbon, and ammonia is easy to liquefy; ammonia contains many hydrogen elements and has high energy density; the storage and transportation technology of ammonia is very mature, human beings have used ammonia for more than 100 years, and it is mature in terms of equipment, regulations, operational norms and hazard disposal methods. What is the economy of green ammonia replacing coal? As the cost of green electricity gradually declines, the cost of green ammonia is also declining. At the same time, the state's support for green hydrogen, synthetic ammonia and other industries is also growing, and China is expected to introduce a subsidy policy this year. Zhu Weiyuan believes that within 10 years, the price of green ammonia is likely to be close to coal. As for how to improve the fine operation of hazardous waste technology, Li Chunping believes that the standard should be thoroughly understood first. For example, there are different standards and limits for heavy metals in cement production. Secondly, cement enterprises can carry out different levels of compatibility of materials according to their actual situation. Improve the fine operation of equipment management, and carry out safety management and control of the whole process. individual mining rights have increased, and Guangdong has become the province with the largest total reserves. In 2022, the resource reserves of Guangdong's mining rights increased by more than 300% year on year, reaching more than 5 billion tons. For the future outlook of the sand and gravel industry, Zhu Xiaoyun expects that the demand in 2023 will be stable year-on-year, and the price center will still move down slightly. In this regard, Zhu Xiaoyun put forward three suggestions: 1, the problem of overcapacity is becoming increasingly serious, for the popular areas along the Yangtze River and coastal areas, enterprises should be more cautious in taking mines. 2. Prices have entered the downward range, and the era of high gross profit may be over, so more attention should be paid to cost-side control. 3. Although the demand for sand and gravel at the infrastructure end still maintains a strong momentum, many infrastructure projects use their own sand and gravel, which is difficult to boost the market. Sand and gravel production enterprises should calmly look at the recovery of sand and gravel demand. sand demand, Zhu Xiaoyun said that the demand for sand and gravel decreased significantly in 2022. The performance of key markets in the north is general, with the coastal areas along the Yangtze River mainly falling, and the middle and lower reaches of the Yangtze River declining significantly. In 2022, the consumption of sand and gravel in Shanghai construction decreased by more than 20% compared with the same period last year. The average resource reserves of