Ferrotitanium dispersing arc furnace cover preparation method

Abstract

The invention relates to a ferrotitanium dispersing arc furnace cover preparation method, comprising the following steps: first preparing furnace cover moulds, preparing asphalt concrete with carbon material, magnesium carbon brick particles and asphalt, forming on the furnace cover moulds while ensuring the thickness of asphalt concrete on the surface of the furnace cover moulds to 250-350mm, tamping asphalt concrete on the furnace cover moulds, clapping the surface of asphalt concrete to obtain furnace cover preformed units, roasting the furnace cover preformed units at 300-400 DEG C for 5-10h, and then roasting at 600-700 DEG C for 10h to obtain the ferrotitanium dispersing arc furnace cover. The ferrotitanium dispersing arc furnace cover prepared by the method has high strength and compaction rate, better thermal insulation property, good production security, low labor intensity and energy consumption and high product quality, and can be used in multi-furnace production; the furnace cover also has high single furnace output and is energy-saving; no asphalt is used in furnace burden, the production cost is low, and a large number of volatile matters and soot are not generated in the process of melting, volatilizing and burning of asphalt in the arc furnace, thus the working environment is clean and no pollution is generated to the surrounding environment.

Description

technical field [0001] The invention relates to an electric arc furnace cover for separating titanium and iron in ilmenite by a smelting method in an electric arc furnace, in particular to the composition and manufacturing steps of an electric arc furnace cover for separating titanium and iron. Background technique [0002] The method of smelting and reducing in the electric arc furnace can separate the titanium and iron in the ilmenite. During the smelting and reducing, the ilmenite powder and the reducing agent containing fixed carbon are placed in the electric arc furnace as the charge, and the The furnace material is heated up to a high temperature of more than 2000 degrees Celsius, and kept at a high temperature for a long reduction time to separate titanium and iron. When using an electric arc furnace to smelt and reduce ilmenite, the open electric arc furnace cannot guarantee the separation temperature and reduction time in the furnace. It should be covered with an e...

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Problems solved by technology

[0003] 1. When asphalt melts, volatilizes, and burns in a high-temperature electric arc furnace, a large amount of asphalt smoke will be discharged. A large amount of asphalt smoke will pass through the charge and emerge from the furnace mouth. The fluorescent substances and carcinogens 3,4 benzopyrene in the asphalt will also Volatilized with the asphalt fume, in order to form a crust on the upper layer of the furnace charge, the upper layer of furnace charge only absorbs a small part of the asphalt fume, and most of the asphalt fume is ejected from the electric arc furnace mouth, which greatly pollutes the working environment and the surrounding environment;

[0004] 2. The shell formed by the upper charge cannot be used multiple times, and can only be used in one furnace production. After the smelting of the first charge is finished, the furnace must be smashed. After the fragments fall into the furnace, a large amount of dust will emerge from the furnace, which is not only labor-intensive, but also greatly pollutes the environment;

[0005] 3. During production, the thickness, strength and compactness of the shell formed by the upper charge are not controllable. Sometimes the shell formed by the upper charge has weak links. During the smelting process, the upper charge with weak links forms The shell may crack and collapse at any time, causing slag dumping accidents and posing safety hazards;

[0006] 4. During production, the thickness, strength and compactness of the shell formed by the upper charge are not controllable, so the heat preservation performance of the shell formed by the upper charge is not very good, and it is not easy to make the temperature in the furnace reach the separation temperature and Keep the reduction time, so that the smelting heating time is long, the energy consumption is high, and the product quality is poor;

[0007] 5. In the charge that is added to the furnace at one time, the upper charge is used for crusting and cannot be used for smelting. The output of a single furnace is low. The shell formed by the upper charge is re-smelted after pounding the furnace, which increases energy consumption and production costs;

[0008] 6. Asphalt is added to the furnace charge just to form a layer of one-time shell with the function of maintaining furnace temperature on the upper layer of charge, which increases production costs, exhaust gas treatment devices and expenses

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