A kind of modified graphite containing low-carbon sliding brick for converter slag blocking and preparation method thereof

Abstract

The invention discloses a modified graphite-containing low-carbon sliding brick for converter slag blockage, and a preparation method thereof. The modified graphite-containing low-carbon sliding brickfor converter slag blockage comprises the following components in percentage by weight: 4 to 6 percent of tabular corundum particles with particle size of 3 to 2 mm, 17 to 25 percent of tabular corundum particles with particle size of 2 to 1 mm, 15 to 22 percent of tabular corundum particles with particle size of 1 to 0.5 mm, 21 to 30 percent of tabular corundum particles with particle size of 0.5 to 0.045 mm, 10 to 14 percent of tabular corundum fine powder with particle size of 0 to 0.045 mm, 2 to 5 percent of modified graphite, 5 percent of alpha-Al2O3 micropowder, 0.5 to 2 percent of carbon black, 3 to 6 percent of metal alloy powder and 2 to 5 percent of a composite antioxidant, wherein the total percentage is 100 percent; and 4 to 5 percent of a phenolic resin binder is added. In the brick, the modified graphite taking flake graphite as a main body is added, an inserting agent performs decomposition during medium-temperature pretreatment to shovel the flake graphite layer by layer to form a congeneric structure and form non-oxide in situ, and corundum skeletons are filled with the substances uniformly and crosswise, so that the high-temperature resistance, erosion resistance, scouring resistance and thermal shock stability of the brick are improved and the service life of the brick is prolonged.

Description

Technical field [0001] The invention belongs to the technical field of refractory materials, in particular to the technical field of converter slag retaining slides, and particularly relates to a low-carbon slide brick for slag retaining of a converter containing modified graphite and a preparation method thereof. Background technique [0002] The converter slag blocking technology uses the sliding plate automatic slag blocking technology to effectively reduce the amount of slag in the converter steel tapping process, improve the cleanliness of molten steel and increase the alloy recovery rate and reduce the smelting cost. At present, this technology has been widely used in domestic medium and large converters, and has achieved good results. The slag blocking technology of the converter slide plate is mainly realized by the combination of the inner nozzle, the upper slide plate, the lower slide plate, the outer nozzle brick and the supporting mechanism; when in use, the upper sli...

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Problems solved by technology

[0003] In order to solve the problems of poor high temperature resistance, poor slag erosion resistance, poor erosion resistance, poor thermal shock stability and short service life of ordinary sliding bricks, the purpose of the present invention is to provide a low-carbon sliding plate for converter slag containing modified graphite The brick and its preparation method, the low-carbon sliding brick for converter slag-retaining containing modified graphite described in the present invention has good high temperature resistance, erosion resistance, erosion resistance and thermal shock stability by adding modified graphite, and Significantly increased service life

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