Comprehensive inner lining structure of submerged arc furnace hearth

There is no fixed format for the methods and materials of submerged arc furnaces and blast furnaces, and each metallurgical plant has its own set of experience. Let me share our design plan for a domestic alloy factory.

The materials have complementary advantages, are reasonable, economical and practical, overlap and occlude the masonry, and eliminate the upper and lower through seams. Each of the three vertical and horizontal products has a special function; it improves the construction technology and reduces the construction cost.

It not only improves the radial structural strength of the hearth lining, but also strengthens the longitudinal structural strength of the hearth lining.

Extend the service life of ceramic masonry, save energy and reduce consumption.

Comprehensive inner lining structure of submerged arc furnace hearth

The right half is the blast furnace bottom and the distribution of thermocouples embedded in the hearth, which is part of the new furnace diagnostic system.

The first layer is a galvanic couple on the upper part of the cold air duct. The second and third layers are respectively in the firing carbon block between the self-baking carbon blocks and the self-baking carbon block between the ceramic layers. Each layer has three measuring points, and each point has 6 electricity. Even; the fourth layer is at the bottom of the dead iron layer, with six measuring points, each with 6 galvanic couples; the fifth layer is above the iron hole, with six measuring points, each with 6 galvanic couples. At the beginning of furnace opening, due to the effective control of the cooling stave water flow rate and furnace bottom temperature (measurement points on the first floor), the temperature at the second floor 1.2.3, the fourth floor 3.4 and the fifth floor 3.4 are all at 650℃ Above, after entering the normal period, the temperature of the above points will be gradually reduced by air volume and water volume control. The temperature near the cooling stave is between 200-350℃.

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