Preparation method of mold slag for water model experiment of iron and steel smelting system

Abstract

The invention relates to a preparing method for steel smelting system water model casting powder for experimental use. The technical scheme comprises the steps of firstly, adding foam particles into the steel smelting system water model; then, adding high-viscosity mixed oil by a water port; afterwards, adding low-viscosity mixed oil by the water port to obtain the water model casting powder for experimental use composed of a foam particle layer, a high-viscosity mixed oil layer and a low-viscosity mixed oil layer successively from top to bottom, so as to simulate the corresponding powder dregs layer, sintering layer and liquid dregs layer in the casting powder of the steel smelting system. The high-viscosity mixed oil is mixed oil composed of plant oil and melted abandoned animal oil, and the low-viscosity mixed oil is a mixed oil composed of plant oil and kerosene. Besides the preparing method for steel smelting system water model casting powder for experimental use is low in cost and simple in technology, the prepared steel smelting system water model casting powder for experimental use has the characteristics of variable viscosity and variable density, better accords with the structure characteristics of the casting powder in the real steel smelting process, and simulates casting powder motion and slag entrapment in the steel smelting system more veritably and vividly.

Description

technical field [0001] The invention belongs to the technical field of water model experiments for iron and steel smelting systems. In particular, the invention relates to a method for preparing mold slag used in water model experiments of iron and steel smelting systems. Background technique [0002] Mold slag is an essential material in the iron and steel smelting process, such as ladles, converters, ladles, tundishes and crystallizers and other high-temperature containers, which are covered with mold slag on the molten iron or steel. Mold slag can usually be divided into three layers: the lowermost layer is in contact with molten steel, and the temperature is higher than the melting point of the mold slag, forming liquid slag floating on the upper surface of molten steel; as the temperature decreases from bottom to top, the viscosity of the slag increases, and the temperature drops to the protective slag. When the sintering temperature of the slag is lower than the sinte...

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Problems solved by technology

At present, there are two main types of mold flux used in water model experiments. One is to use a mixture of aviation oil and vegetable oil (Zhou Li, Physical simulation of 120t ladle confluence slag roll, Steelmaking, 2012, 28 (2): 56~58) simulation volume Slag or slag removal, but this kind of mixed oil is in liquid state, and it is easy to be exposed and slag-encrusted during the experiment, lacking the sintering layer and powder slag layer similar to the actual mold slag, and the simulation results are difficult to reflect the movement of the slag in the actual iron and steel smelting process; The second is to use foamed plastic particles to simulate the movement process of slag entrapment and slag (Qi Xinxia, ​​Research on slag entanglement in slab crystallizer, Special Steel, 2004, 25(3):29~31), but this foamed plastic particle It is granular at room temperature, and it is easy to expose the liquid surface during the experiment, and it is not easy to slag, and because there is no liquid slag layer, it is impossible to simulate the downstream lubrication of the slag liquid in the crystallizer, and there is a big gap with the actual physical process