Steel-core aluminum deoxidizing agent blocks and method for producing the same

Abstract

The invention relates to a steel core aluminum deoxidizer block and a preparation method thereof, and effectively solves the problems that the preparation of the steel core aluminum deoxidizer block is complex, the aluminum content is unstable and the appearance is rough. The technical proposal is as follows: an external layer is coated outside an internal layer, no slit exists between the internal layer and the external layer, the external layer is composed of a lower layer, a transition layer and an upper layer, the transition layer is positioned at the upper end of the lower layer, and the upper layer is positioned at the upper end of the transition layer. The preparation method thereof comprises the following steps: melting pure aluminum ingot to prepare aluminum liquid, adding 0.1-0.3% of sodium fluoroaluminate to 200kg of the aluminum liquid to be taken as a deslagging agent for deslagging, purifying molten aluminum, molding by 35%-65% of the purified molten aluminum and 35%-65% of steel core based on the weight percentages, taking out the purified molten aluminum of the weight percentages to be injected into a die, casting the purified molten aluminum to the top end of the lower layer of the die, stopping casting, vertically placing the weighed steel core of the weight percentages into the purified molten aluminum in the die, naturally cooling, and obtaining the steel core aluminum deoxidizer block by demolding. The method can help realize once casting molding and stable aluminum content, and is an innovation in the steelmaking field.

Description

1. Technical field [0001] The invention relates to the field of steelmaking, in particular to a steel core aluminum deoxidizer block and a manufacturing method thereof. 2. Technical background [0002] In the steelmaking industry, pure aluminum products such as aluminum wire or aluminum pellets are usually used for deoxidation, because the melting point of aluminum is too different from molten steel. The specific gravity is large, so the aluminum block floats on the surface of the molten steel without precipitation and serious burning loss. Pure aluminum reacts violently in the molten steel, and some aluminum will float on the surface of the molten steel and burn, which reduces the aluminum yield and causes poor deoxidation effect. Increase the cost of steelmaking. At present, the steel core aluminum deoxidizer block used is complicated to make, the aluminum content is unstable, and the outer surface is rough, which affects the use effect. So can we develop a simple producti...

AI Technical Summary

Problems solved by technology

[0003] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a steel-cored aluminum deoxidizer block and its manufacturing method, which can effectively solve the problem of complex production of the steel-cored aluminum deoxidizer block, unstable aluminum content, and rough appearance. The technical solution to the problem is that the steel-cored aluminum deoxidizer block is composed of an outer layer and an inner layer, the outer layer is wrapped around the inner layer, there is no gap between the inner layer and the outer layer, and the outer layer is composed of a lower layer, a transition layer and an upper layer , there is a transition layer on the upper end of the lower layer, and an upper layer on the upper end of the transition layer. The preparation method is to melt the pure aluminum ingot to make aluminum liquid, and add 0.1-0.3% of its weight to every 200kg aluminum liquid as a slag remover Carry out slag removal, purify aluminum water, and then use 35%-65% purified aluminum water and 35%-65% steel core to make a mold, first, take the above-mentioned clean aluminum water in the weight ratio and inject it into the mold , pour clean aluminum water to the top of the lower layer of the mould, stop casting, and then vertically place the weighed steel core with a good weight ratio into the clean aluminum water in the mould, after natural cooling, the demoulding becomes the steel core aluminum deoxidizer block , in order to ensure the use effect, the outer layer is an inclusion made of pure aluminum; the inner layer is a cylindrical body made of steel, or other shapes such as a prism; the vertical section of the lower layer is inverted Trapezoidal, the vertical section of the transition layer is an inverted trapezoid, the upper end of the vertical section of the lower layer is the same size and length as the lower end of the vertical section of the transition layer; the vertical section of the upper layer is rectangular, the lower end of the vertical section of the upper layer is the same size and length as the upper end of the vertical section of the transition layer; Said sodium fluoroaluminate is a commercially available model XHT-LC deslagging agent; said pure aluminum ingot is a pure aluminum ingot with a mass purity of more than 99.7%.

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