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Cold Furnace Paste Overall Lining Process
Feb 12, 2019

The cold paste overall furnace construction process is different from the traditional furnace construction process in that it does not require carbon brick masonry. Only the micro-expansion cold paste is combined with the cold-rolling process to seamlessly build the ore furnace, and the furnace body is driven inside the furnace body. The frame is paved with cold paste on the furnace wall and integrally formed. After the furnace body is built, it must pass through a strict oven stage and use the heat in the furnace at the initial stage of production or even after half a year of use to make the furnace lining roast and char, and finally the cold enamel layer is coking and graphitized to form a bismuth effect, which is cold. The key to the overall furnace construction process. The cold paste whole furnace can improve the bulk density, compressive strength, oxidation resistance and wear resistance of the lining. It can greatly improve the corrosion resistance and permeability resistance of slag and molten iron, and is superior to the traditional carbon brick furnace. The use of cold-boiled whole furnace construction technology has changed the traditional carbon bricks when the furnace was built. Some furnaces were oxidized and consumed after only a few months of carbon lining, and they were forced to stop the overhaul and rebuild. The cold paste was successfully extracted as the plasticity of the furnace material, and a reasonable combination was made in the selection of materials and the innovation of technology and the simplicity of construction, which broke through the limitations of traditional carbon brick furnaces and also satisfied the ferroalloys. The smelting technical requirements of the yellow phosphorus furnace and other smelting furnaces have realized the requirements for mining and metallurgical enterprises to reduce energy consumption and increase production. It has played a positive role in improving the technical level of the electric furnace device.

The patented technology of the cold paste furnace is to make full use of the process structure of self-developed cold and seamless seamless molding. The invention utilizes the same characteristics of the cold paste which is easy to be solidified and has the same physical and chemical properties after calcination as the carbon brick. As a characteristic of the plasticity of the amorphous carbon material, it completely replaces the carbon brick as the overall material for the furnace body of the smelting furnace. The structure is shown in Figure 1. The structural process of seamless construction greatly reduces the technical difficulties of the molten iron leakage furnace bottom and destroying the furnace wall, so that the service life of the electric furnace is well extended, eliminating many hidden dangers during the furnace construction, and ensuring The normal production of electric furnaces has a wide range of applications. In addition to the new construction, construction and technical transformation of ferroalloy and yellow phosphorus electric furnace, the process technology can also be used for the construction, construction and technical transformation of various smelting furnaces such as smelting electric furnaces and aluminum electrolysis tanks. Through the comprehensive use of different matching paste technology, the cold paste furnace technology can be widely used in electric furnace design and construction in different regions at home and abroad, increasing economic and social environmental benefits.

Cold furnace paste overall lining process

At present, there are a number of enterprises that prepare cold-press paste for cold-rolling process, mainly using calcined anthracite and graphite as aggregates, modified asphalt as binder, coal tar and resin as additives, and various anti-shrinkage materials. The main raw materials are kneaded, which is not only applied to the overall construction of the submerged arc furnace, but also can partially repair the lining. However, due to the process, there is still stratification between the layers, which causes a major accident.

At present, through the efforts of many carbon materials companies, the improvement of the technology and process of cold-mixing furnaces has reached the higher requirements of any type of ore furnace. Among them, Guizhou Kanggeli Carbon Material Co., Ltd. and its subsidiary Guizhou Ali Mining Furnace Technology Development Co., Ltd. and its R&D center carry out formula research and adjustment of cold paste materials for different furnace types, different construction conditions and production requirements. For some special, for example, rare earth smelting electric furnaces, the specific technical requirements are adopted and the process parameters are adjusted. The use of cold paste to reduce the inner diameter of the phosphorus furnace, change the unreasonable production process coefficient in the furnace, so that the yellow phosphorus production will increase accordingly, such as the 3.2MVA phosphorus furnace of Guiyang Sanjiang Yellow Phosphorus Plant, which is about 4.5t before the change; 5t after the technical transformation. many. The cold rolling process was used to successfully transform six 15MVA phosphorus furnaces of the company, so that the output of each furnace was increased from 17-18t to 21.5-22t. The electric furnace power consumption is 14500 kWh/t before the technical transformation, and the power consumption is about 13800 kWh/t after the technical transformation. Effectively achieve the effect of increasing production and energy saving, and prolong the service life of the furnace.

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