High-strength H-shaped steel for prefabricated buildings and production technology of high-strength H-shaped steel

Abstract

The invention discloses high-strength H-shaped steel for prefabricated buildings. The high-strength H-shaped steel is prepared from the raw materials including, by weight, 1,500-1,600 parts of iron ore raw material, 300-400 parts of coke, 120-160 parts of pulverized coal and 100-120 parts of a modified refining agent. The invention further discloses a production technology of the high-strength H-shaped steel for the prefabricated buildings. Through a bottom blowing mode, the smelting time can be shortened, the power consumption can be reduced, the desulfurization and dephosphorization conditions can be improved, the residual manganese content in the steel can be increased, the yield of the steel can be increased, the temperature uniformity of molten steel and the uniformity of components can be improved, and the quality of the steel can be improved; through cooperation of stirring and bottom blowing, the diffusion rate of reactants and products is increased, then the floating removal rate of inclusions is increased exponentially, and the quality of the steel is improved; through addition of the modified refining agent, the slagging effect and the slagging rate are increased, moltensteel impurities are adsorbed, the smelting cost per ton of steel is obviously reduced, phosphorus removal is facilitated, and the quality of the steel is improved.

Description

technical field [0001] The invention belongs to the technical field of construction, and in particular relates to a high-strength H-shaped steel for prefabricated buildings and a production process thereof. Background technique [0002] Buildings assembled from prefabricated parts and components on site are called prefabricated buildings. According to the form and construction method of prefabricated components, they can be divided into five types: block building, plate building, box building, skeleton plate building and rising plate building. H-shaped steel is an economical cross-section high-efficiency profile with a more optimized cross-sectional area distribution and a more reasonable strength-to-weight ratio. It is named because its section is the same as the English letter "H". , Therefore, H-shaped steel has the advantages of strong bending resistance in all directions, simple construction, cost saving and light structure weight, and has been widely used. [0003] Th...

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Problems solved by technology

[0003] The H-beam production process is becoming more and more mature, but there are still the following problems: the screening range of ore particles is large, they are put into the reaction together, it is difficult to mix evenly, the reduction effect is not good, and the use of fluorine-containing flux will damage the steel and the reaction equipment after thermal decomposition. cause damage, the raw materials also contain some fluxing ingredients, so the amount of fluxing agent added cannot be well grasped, and the power consumption in the reaction process is huge, which increases the production cost, the slag refining effect is not good, and the quality of the steel is difficult. control

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