On January 14, in the production workshop of Guizhou Sanxiang Technology Co., Ltd. (hereinafter referred to as Sanxiang Technology), located in Tingao Street, Songtao Autonomous County, the equipment was running non-stop, and the workers were performing their duties, and there was a busy production scene everywhere.
Chen Jianhong, deputy general manager of Sanxiang Technology, introduced that after the electrolytic manganese press filter waste residue is treated by the 1 million tons of annual electrolytic manganese slag resource comprehensive utilization project, the ammonia-containing water vapor generated is cooled by the heat exchanger and used as low-concentration ammonia water, which can be reused in the production process.
According to reports, the 1 million tons of electrolytic manganese slag resource comprehensive utilization project jointly built by Songtao Sanhe Manganese Industry Group Co., Ltd. and Hunan Jianxiang Hi-Tech New Technology Development Co., Ltd. will land in Songtao in 2022 with Sanxiang Technology as the carrier. The project can maximize the collection of liquid ammonia in the electrolytic manganese slag, and the resulting cementitious materials can be sold in multiple fields to realize the comprehensive utilization of electrolytic manganese slag with ultra-low emission, high waste utilization, zero land loss and ultra-energy saving.
Songtao has proven manganese ore reserves of about 7400 million tons, is one of the important manganese producing areas in the country.
In recent years, Tongren has actively leveraged the strength of scientific research experts such as the Environmental Development Center of the Ministry of Ecology and Environment, the Chinese Academy of Environmental Sciences, and the China Manganese Technology Association to explore the high-quality development path of the manganese industry, and issued documents such as the Implementation Plan for the Control of Electrolytic Manganese Pollution in Tongren City and the High-quality Development Plan for the Manganese Industry in Tongren City (2021-2030) to comprehensively control manganese pollution and promote the continuous improvement of the ecological environment.
Manganese slag is a solid waste, which is not treated well is pollution, and good utilization is a resource. Chen Jianhong said that in 2022, Songtao Sanhe Manganese Industry Group Co., Ltd. will invest 1800 million yuan, the introduction of Hunan Jianxiang high-tech new technology development, the joint establishment of the country's first professional electrolytic manganese slag resource comprehensive utilization enterprise - Sanxiang technology.
Sanxiang Science and Technology invested in the construction of an annual processing of 1 million tons of electrolytic manganese slag resource comprehensive utilization project, covering an area of 73 acres, the main content of the construction includes the civil engineering of warehouses, roasting workshops, central control buildings, silos and other buildings, the purchase and installation of treatment equipment, as well as water supply and drainage, power supply, fire protection, environmental protection, safety and other public works.
In view of the characteristics of electrolytic manganese slag, the project adopts the two-stage roasting technology of low-temperature drying deammonia and high-temperature activation calcination and sulfur fixation to activate the technical scheme of electrolytic manganese slag.
On the one hand, the ammonia nitrogen and water of manganese slag are removed at medium temperature, and ammonia can be used in electrolytic manganese through ammonium to realize the recycling of ammonia; On the other hand, by adding sulfur fixing agent for high-temperature roasting, the hydration activity of silicate minerals in electrolytic manganese slag is improved and the sulfur and heavy metals in it are solidified, so that its application field is expanded from a single cement industry to concrete, mine filling, building materials and other industries.
The project will be ignited in May 2023 and officially put into operation in November of the same year, marking that the manganese triangle has entered a substantive stage in the implementation of the first environmental protection inspector rectification, and the chapter of manganese pollution control in Songtao.
Manganese slag is not "slag"! Chen Jianhong is full of confidence in the development prospects: "After the project is put into operation, it can process 1 million tons of manganese slag every year, and generate 600,000 tons of cementitious materials for cement and building materials, 40,000 tons of liquid ammonia, and achieve a comprehensive output value of more than 50 million yuan." ”
Guizhou ** Tianyan News reporter Ge Yongzhi.
Edited by Bai Chunxia.
Second instance Yang Cong. Three trials of Zhu Xie.