Both at home and abroad attach great importance to the development of sensible heat recovery technology of liquid slag, and a variety of sensible heat recovery technologies of liquid slag have been developed. According to relevant data, the following sensible heat recovery technologies are mature and practical. The technology of producing slag cotton by sensible heat of blast furnace liquid slag has the following basic characteristics: (1) The sensible heat recovery rate of blast furnace liquid slag is as high as over 70%; (2) Compared with cupola technology, the production of granular cotton has considerable economic benefits; (3) It is beneficial to the improvement of ecological environment. Russia adopts drum method to recover and develop sensible heat of steel slag. Steel slag enters the steam drum through the slag tank, and the temperature of the generated steam mixed gas is 90- 170 degrees, which can be directly used in living facilities or heated to 600 degrees to generate electricity. After testing, the heat utilization coefficient can reach 50%. Shanghai Baosteel introduced and improved the Russian drum process to treat liquid steel slag, and developed the drum process to treat liquid steel slag. This technology belongs to the most advanced liquid steel slag treatment process at present. The treatment of steel slag by drum method has the following advantages: it can replace the hot splashing method, box splashing method, air quenching method and water quenching method with large investment, large land occupation, heavy pollution and poor treatment effect; The treated steel slag has good stability and can be directly recycled, which effectively improves the environmental pollution during the treatment of liquid slag; The process flow is short, which can save a lot of investment. The technology and equipment formed by this project have wide application value and have been applied in Xuanhua Steel.
Air quenching liquid slag process Air quenching liquid slag process, Dongfang Environment applied for the patent of air quenching liquid slag process, and began to conduct long-term tests in several steel mills, and the technology became more and more mature. This technology has the following basic characteristics: the sensible heat recovery rate of blast furnace liquid slag is as high as 70%; Liquid slag is treated as dry slag; Closed treatment, no environmental pollution. The Ural Iron and Steel Research Institute of Russia has developed a set of air-quenched steel slag treatment process for recovering heat energy. During the dumping process of liquid steel slag, the slag contacts with airflow to generate radiant heat, which is collected by special devices and converted into hot water, steam and hot air for recycling. Low temperature storage tank material technology, Kobe Steel and its subsidiary Kobayashi Steel successfully developed the sensible heat conversion technology of liquid slag as a low temperature heat storage material to convert the sensible heat of liquid slag into hot water for heating and air conditioning.
It takes a long time to eliminate fCaO in steel slag by natural aging. In order to shorten the aging time, Japan developed warm water aging, steam aging and steam pressure aging, and realized sensible heat recovery of liquid slag. In terms of sensible heat recovery technology, China has introduced different technologies and equipment from Japan, Russia, Germany, the United States and other countries, which have been used or are being developed. At present, on the basis of traditional treatment technology, many novel processes have appeared. For the comprehensive utilization of metallurgical slag, the biggest utilization is in the field of building materials, and quenching of liquid slag is the first process of high added value of building materials. Over the years, through the efforts of all parties, liquid slag water quenching technology and other technologies have been very mature. On this basis, combined with the variety, composition and smelting process of metallurgical raw materials, a new generation of sensible heat recovery technology of liquid slag is further developed. Such as hot splashing method, box splashing method, feng shui quenching method and water quenching method. The rotary table dry slag treatment technology was developed by Kevanna Company in Britain, and the temperature of high-temperature airflow reached 400-600 ~ C. According to data reports, it is still being tested and improved. In recent years, Dongfang Environment has reformed the process according to the slag dry granulation scheme developed by Dnepropetrov Metallurgical Research Institute 1986, combined with China's national conditions and referring to the data of continuous casting and rolling of non-ferrous metals, and developed the slag recovery system of dry quenching coke oven.
For more information about project/service/procurement bidding, and to improve the winning rate, please click on the bottom of official website Customer Service for free consultation:/#/? source=bdzd