Blast furnace phosphoric acid

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There will be a major transformation in China’s traditional phosphate production process. The domestically developed pilot project for \"5m3 blast furnace phosphate\" has been successful, and all preparations for the 50 cubic meter industrial-scale experiment are now in full swing. 　　It was learned at the \"Report Meeting on the Blast Furnace Phosphoric Acid Process Project in the Bijie Experimental Zone of Guizhou Province\", held in Beijing on February 20, that the \"5-cubic-meter blast furnace phosphoric acid pilot project\", developed independently in China with proprietary intellectual property rights, has achieved phased results, and all preparatory work for the 50-cubic-meter industrial-scale experiment project has been fully underway. This marks a qualitative leap in China’s traditional \"wet\" phosphoric acid production process. 　　It is reported that the pilot-scale testing equipment for \"5m3 blast furnace phosphoric acid\" operated normally for 28 consecutive days last December, and phosphoric acid was produced using Zhenjin’s high-magnesium, low-grade phosphate ore containing 17.05% P2O5 and 9.6% MgO – phosphoric acid that can be used to manufacture important agricultural products such as qualified ammonium phosphate and calcium hydrogen phosphate ； The operational test with 20% substitution of coke by white coal proceeded normally, and there is still room for further improvement ； Wastewater recycling has been achieved ； Technical challenges such as explosions, operational blockages, and temperature control that arise when directly using medium- and low-grade phosphate ores have been effectively overcome, confirming the feasibility of the innovative thermal blast furnace phosphoric acid production process based on the coal and phosphate resource structure. 　　Professor Chang Jinshi from China Agricultural University, a member of the Central Intelligence Coordination Group for Poverty Alleviation in Remote Areas and the executive deputy head of the expert advisory group for the Bijie Development and Poverty Alleviation Ecological Construction Pilot Zone in Guizhou Province, said in an interview with reporters that the organization and implementation of the pilot project related to phosphoric acid production using 5m3 blast furnaces have always received high attention from the Party and the government. State Councilor Liu Yandong, Vice Chairman of the National Committee of the Chinese People’s Political Consultative Conference and Minister of Science and Technology Wan Gang, among other leading officials, all issued important instructions. This project review meeting was jointly held by the Central Coordination Group for Intellectual Support and Poverty Alleviation in Border Areas, the expert advisory group for the Bijie Development, Poverty Alleviation and Ecological Construction Pilot Zone in Guizhou, as well as the People’s Government of Guizhou Province and the Guizhou Provincial Committee of the Chinese People’s Political Consultative Conference. Leaders from relevant ministries and commissions such as the Ministry of Finance, the National Development and Reform Commission, the Ministry of Science and Technology, and the Ministry of Environmental Protection attended the meeting and listened to the presentations. 　　At the presentation, Ma Shujи, the patent inventor and senior engineer at the Guizhou Academy of Sciences, explained that the blast furnace phosphate production process involves using phosphate rock and coal to undergo a combustion reaction in a blast furnace under specific conditions in order to produce phosphate directly. It possesses many advantages over traditional wet phosphoric acid production processes, and in 2002, this process technology was granted a **patent. 　　Ma Shujи said that, compared with the traditional \"wet process,\" the main technical features and innovations of the new process are as follows: it overcomes the various drawbacks of the current \"thermal\" and \"wet\" phosphate production methods, draws on the valuable experiences and lessons learned from previous research projects, and creates an innovative technological system that is in line with the new guidelines of the scientific development concept in the fertilizer industry. This system applies the principles of circular economy to achieve a more rational allocation of coal and phosphorus resources and improve their utilization efficiency. 　　It is possible to change the currently dominant \"wet\" phosphoric acid production process at home and abroad, which is based on high-quality sulfur and phosphorus resources; this approach is not suitable for China’s situation of limited oil and gas reserves. By adopting a production method that makes use of coal and phosphorus resources, it is possible to produce phosphoric acid and further process it into high-efficiency compound fertilizers to meet the country’s substantial agricultural needs. 　　It solves the major problem that the phosphating industry both domestically and internationally has been unable to make direct use of medium- and low-grade phosphate ores. It opens up new avenues for the direct utilization of China’s vast resources of medium- and low-grade phosphate ores, which account for over 90% of such resources. According to reports from the Ministry of Land and Resources, based on current processing requirements and consumption levels, the reserve life of China’s existing phosphate ore resources is only 10 years; however, through our innovative technological efforts, this period can be extended to 150 years (the phosphate resources alone in Yunnan and Guizhou provinces can ensure supply for over 100 years). 　　By applying this process technology, it is possible to produce high-efficiency compound fertilizers within the same enterprise, using the same coal and phosphorus resources. Clearly, this approach is superior to the current method of purchasing liquid ammonia externally for the production of high-efficiency compound fertilizers, in terms of both efficient use of resources and reduction of production and management costs. 　　“The integration of \"blast furnace phosphoric acid\" with thermal power plants, along with the application of innovative technologies for a circular economy approach, can facilitate a favorable shift from the current treatment methods to more proactive approaches for dealing with solid waste and pollutants such as SO2 and CO2 in exhaust gases. This enables the realization of the core principle of the 3R principles in a circular economy within the thermal power industry – namely, the maximum utilization of resources. It transforms pollution sources in this industry into \"new resources\", turning \"pollutants\" into \"new wealth\" through optimal development models. 　　Wang Lusheng, former vice chairman of the Guizhou Provincial Political Consultative Conference and head of the project expert group, said that Guizhou is the only province in China that possesses substantial coal and phosphate resources, with the Bijie region being the area with the highest concentrations of these resources in Guizhou (phosphate mines account for 52% of the province’s total, while coal accounts for 45%). Initiated by Comrade ***, then Secretary of the Guizhou Provincial Party Committee, and aimed at exploring a new path for scientific development, the \"Bijie Experimental Zone for Development, Poverty Alleviation, and Ecological Construction\" was established on June 9, 1988, with the approval of the State Council. It undertakes the sacred mission entrusted to it by the Party and the government to serve as a model in the short term and to explore new approaches in the long term. Over the past 20 years, the Bijie Pilot Area has taken poverty alleviation through development, ecological construction, and population control as its “three main themes.” Focusing on economic development as the core, it has shifted from relief-based poverty alleviation to development-oriented approaches, while vigorously pursuing economic development and population control. At the same time, ecological construction is integrated into economic development; economic growth drives ecological improvement, while the continuous restoration of the ecosystem promotes economic development, thereby breaking free from the cycle of poverty – uncontrolled population growth – severe ecological degradation – and further exacerbation of poverty. After 20 years of development, the comprehensive economic strength of the Bijie region has increased by 10 times, rising from the bottom rank in the province to third place among the nine prefectures and cities. It has turned out that the Bijie Pilot Zone, established back then with the three main objectives of poverty alleviation through development, ecological construction, and population control, was an absolutely correct decision. 　　Sun Guoqiang, Vice Governor of Guizhou Province, said in his report that the common task facing the Bijie Pilot Zone at present is to \"review and summarize the past 20 years, and look ahead to and plan for the next 20 years.\" Due to the abundance of coal and phosphorus resources, the integration of coal, electricity, and phosphorus production, along with the phosphorus fertilizer industry, will be one of the new pillars for the industrial development of the Bijie Pilot Area in the future. The Guizhou Province’s 11th Five-Year Plan included two major phosphate-related projects, namely \"Coal, Electricity, and Phosphorus Integration\" and \"Construction of Phosphate Fertilizer Production Bases\", with a total investment of 22 billion yuan. These two projects not only hold great strategic significance for the future development of the Bijie Pilot Area, but also open up new sources for phosphate fertilizer production in China. Although the 5-cubic-meter pilot test of blast furnace phosphoric acid has been largely successful, there is still a series of tasks to be carried out, including industrial-scale experiments on a 50-cubic-meter scale, before the new process can be put into industrial use. The success of the blast furnace phosphate project will make an integrated circular economy of coal, phosphorus, and electricity possible, which is of great significance for implementing and practicing the scientific outlook on development. It is hoped that relevant ministries and commissions such as the Ministry of Science and Technology and the National Development and Reform Commission will show concern for and support this project, so that it can go through the entire process from pilot production to industrialization at an early date. 　　It is reported that the pilot project for phosphoric acid production using a 5m3 blast furnace in Phase 1 is expected to complete its evaluation and assessment between August and September this year. In the second phase, an industrial-scale innovative technology demonstration project for the circular economy of coal and phosphorus resources using 50m3 blast furnaces will be established, aiming to create a new process system for medium-sized enterprises producing phosphoric acid by the \"high\" method (8,000–10,000 tons of phosphoric acid per year), which can serve as a model project for wider application ； At the same time, corresponding phosphating products are developed and produced; once the research tasks are completed, the entity can operate independently and be responsible for its own profits and losses. This not only lays a solid foundation of a stable team of scientific and technical personnel necessary for carrying out a series of innovative technology projects related to the circular economy of coal and phosphorus resources, but it also helps to reduce subsequent investment in research funds.