The Production and Utilization of Two Smelting Processes for V-Ti Magnetite

2014 ◽  
Vol 881-883 ◽  
pp. 1297-1300
Author(s):  
Zhao Hui Zhang ◽  
Wei Ming Kong ◽  
Fu Cai Zhao ◽  
Xi Dong Xie
Keyword(s):  
Blast Furnace ◽  
Large Scale ◽  
Raw Materials ◽  
Direct Reduction ◽  
Mineral Resources ◽  
High Energy ◽  
Rotary Hearth Furnace ◽  
Hearth Furnace ◽  
Product Price ◽  
Blast Furnace Production

In this paper, two processes for V-Ti magnetite smelting were introduced, the processes respectively are the conventional blast furnace-BOF process and the high-profile rotary hearth furnace direct reduction technology. The two kinds of processes were introduced briefly, and the problems of the two processes in the production of V-Ti magnetite were analysed. The blast furnace-BOF process with the relatively perfect, large output, high energy efficiency can't make full use of Ti in the mineral resources, in this way, the resource was wasted and the environmental were polluted, and the existence of Ti in slag can also bring a series of problems in blast furnace production. Rotary hearth furnace direct reduction technology has the advantages of high reduction temperature, low product price, flexible selection for raw materials and reducing agent, while the large scale of equipment brings a series of problems to the production and design.

scholarly journals A new method of manganese alloys obtaining

2018 ◽  
pp. 45-49
Author(s):  
N. V. Panishev ◽  
V. A. Bigeev ◽  
M. V. Potapova ◽  
L. A. Zakutskaya
Keyword(s):  
Large Scale ◽  
New Technologies ◽  
Direct Reduction ◽  
Maximum Yield ◽  
Rotary Hearth Furnace ◽  
Technological Parameters ◽  
Hearth Furnace ◽  
Large Scale Testing ◽  
New Process ◽  
Process Elements

High cost of the ferromanganese production by traditional methods resulted in searching of new technologies for its production. The main objective of the study was to establish the technological parameters of a new process for the ferromanganese production by using ITmk3 process elements in laboratory conditions. The studies were carried out in the “Nabertherm” chamber furnace, which allows for simulate the temperature and time parameters of ITmk3 process elements in a rotary hearth furnace.The charge for ferromanganese obtaining consisted of manganese ore from the Zhayremsk deposit (Kazakhstan) and non-scarce coal, the consumption of which provided close to stoichiometric one in carbon for the direct reduction of manganese and iron from the correspondent oxides. The composition of the ore gangue and coalash provided a mixture with a slag melting point below 1400 °C.The maximum yield of ferroalloy and the conversion of manganese into the ferroalloy from the burden was achieved at a temperature and duration of thermal treatment of 1500 °C and 10 min, respectively. Information obtained during the study may be used for large-scale testing in a commercially size rotary hearth furnace.

Research on the Magnetizing Roasting and Magnetic Separation of Blast Sludge

2014 ◽  
Vol 644-650 ◽  
pp. 5451-5454
Author(s):  
Xu Bai ◽  
Shu Ming Wen ◽  
Shao Jun Bai ◽  
Chao Lv ◽  
Peng Xiang Zhang
Keyword(s):  
Experimental Study ◽  
Blast Furnace ◽  
Iron Ore ◽  
Raw Materials ◽  
Optimum Conditions ◽  
High Iron Content ◽  
Magnetic Current ◽  
Blast Furnace Production ◽  
Magnetizing Roasting ◽  
Roasting Time

In the blast furnace production process, the high iron content in the sludge produced by collecting, Iron can be used as recycled raw materials. Experimental study found that the use of magnetic roasting - weak magnetic iron powder method of recovering technology is feasible. The optimum conditions are: the grinding fineness is 87%, calcination temperature is 750 °C, roasting time is 25min, magnetic current is 1.5A under conditions to obtain a grade of 59% recovery rate of 79.3% iron ore .

scholarly journals TLS and SfM Approach for Bulk Density Determination of Excavated Heterogeneous Raw Materials

Minerals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 174 ◽  
Author(s):  
Peter Blistan ◽  
Stanislav Jacko ◽  
Ľudovít Kovanič ◽  
Julián Kondela ◽  
Katarína Pukanská ◽  
...  
Keyword(s):  
Bulk Density ◽  
Laser Scanning ◽  
Large Scale ◽  
Raw Materials ◽  
Terrestrial Laser Scanning ◽  
Mineral Resources ◽  
Point Clouds ◽  
Raw Material

A frequently recurring problem in the extraction of mineral resources (especially heterogeneous mineral resources) is the rapid operative determination of the extracted quantity of raw material in a surface quarry. This paper deals with testing and analyzing the possibility of using unconventional methods such as digital close-range photogrammetry and terrestrial laser scanning in the process of determining the bulk density of raw material under in situ conditions. A model example of a heterogeneous deposit is the perlite deposit Lehôtka pod Brehmi (Slovakia). Classical laboratory methods for determining bulk density were used to verify the results of the in situ method of bulk density determination. Two large-scale samples (probes) with an approximate volume of 7 m3 and 9 m3 were realized in situ. 6 point samples (LITH) were taken for laboratory determination. By terrestrial laser scanning (TLS) measurement from 2 scanning stations, point clouds with approximately 163,000/143,000 points were obtained for each probe. For Structure-from-Motion (SfM) photogrammetry, 49/55 images were acquired for both probes, with final point clouds containing approximately 155,000/141,000 points. Subsequently, the bulk densities of the bulk samples were determined by the calculation from in situ measurements by TLS and SfM photogrammetry. Comparison of results of the field in situ measurements (1841 kg∙m−3) and laboratory measurements (1756 kg∙m−3) showed only a 4.5% difference in results between the two methods for determining the density of heterogeneous raw materials, confirming the accuracy of the used in situ methods. For the determination of the loosening coefficient, the material from both large-scale samples was transferred on a horizontal surface. Their volumes were determined by TLS. The loosening coefficient for the raw material of 1.38 was calculated from the resulting values.

Mathematical model of direct reduction in multilayer pellets made of metallurgical dust in a rotary hearth furnace

2017 ◽  
Vol 46 (8) ◽  
pp. 1443-1459 ◽  
Author(s):  
Ying Liu ◽  
Wen Zhang ◽  
Zhongmu Zhou ◽  
Yang Xu ◽  
Long Wang
Keyword(s):  
Mathematical Model ◽  
Direct Reduction ◽  
Rotary Hearth Furnace ◽  
Hearth Furnace ◽  
Metallurgical Dust

Study on the Key Technologies of Direct Reduction for Rotary Hearth Furnace Dealing with Carbon Containing Pellets

2012 ◽  
Vol 217-219 ◽  
pp. 437-440
Author(s):  
Jie Qin
Keyword(s):  
Direct Reduction ◽  
Continuous Operation ◽  
Rotary Hearth Furnace ◽  
Current Development ◽  
Hearth Furnace ◽  
Technology Design ◽  
Cold Pressing ◽  
Key Technologies ◽  
Metallized Pellets ◽  
Pressing Technology

The current development of derect reduction technology for rotary hearth furnace (RHF) is introduced. It is essential to stable and continuous operation of the RHF carrying out the following technologies: the cold-pressing technology，design of the charging machine and discharging machine of the RHF, temperature, pressure and atmosphere in the furnace, and the antioxidation of the metallized pellets. The current develop situation of these technologies are fully discussed.

Development Prospect of Rotary Hearth Furnace Process in China

2013 ◽  
Vol 746 ◽  
pp. 533-538 ◽  
Author(s):  
Ying Yi Zhang ◽  
Yuan Hong Qi ◽  
Zong Shu Zou ◽  
Yun Gang Li
Keyword(s):  
Resource Allocation ◽  
Iron Ore ◽  
Direct Reduction ◽  
Reduction Process ◽  
Economic Security ◽  
Practical Significance ◽  
Low Grade ◽  
Rotary Hearth Furnace ◽  
Hearth Furnace ◽  
Direct Reduction Process

Summarized the development situation of rotary hearth furnace (RHF) direct reduction technology, ore resource allocation situation and direct reduction iron demand. The survey results show that: China's iron ore resource allocation heavily rely on imported iron ore, gas-based direct reduction process (MIDREX, HYL-III, FINMET) is not likely to be the mainly direct reduced iron (DRI) process in China. However, non coking coal resources is very rich in China, research and development of coal-based direct reduction process (such as FASTMET and ITMK3 process) has important practical significance, it can strengthen the comprehensive utilization on low grade iron ore, associated mineral resources and iron & steel plant dust and sludge. It has great significance to alleviate steel scrap demand and stable development of the iron and steel industry and protect the national economic security in China.

Theoretical and practical research on relationship between blast air condition and hearth activity in large blast furnace

2020 ◽  
Vol 117 (1) ◽  
pp. 113 ◽  
Author(s):  
Bing Dai ◽  
Hong-ming Long ◽  
Yi-long Ji ◽  
Jia-ting Rao ◽  
Yun-cai Liu
Keyword(s):  
Blast Furnace ◽  
Kinetic Energy ◽  
Raw Materials ◽  
Volume Ratio ◽  
Operation Condition ◽  
Extensive Experience ◽  
Air Volume ◽  
Blast Furnace Production ◽  
Air Speed

From the results calculated by theoretical derivations, it was found that the characteristics of tuyere raceway determined by the operation condition for blast air played a critical effect on the heart activity. The speed and kinetic energy of blast air should be proportional to the volume of blast furnace (BF), and the comprehensive optimization of air volume and tuyere which should vary with the quality of raw materials was essential. The calculation methods of air volume ratio and coefficient for different BFs were put forward. Moreover, the details on hearth activity recovery of a 4747 m3 blast furnace in China were elaborated. Based on the extensive experience in blast furnace production, the various phenomena used to judge air speed and kinetic energy whether reasonable were discussed. In summary, hearth activity was closely related to the characteristics of BF raceway and reasonable air speed and kinetic energy could effectively improve the activity.

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