Special-shaped crucible for steel-making bottom blowing and preparation method thereof

Abstract

The invention discloses a special-shaped crucible for steel-making bottom blowing and a preparation method thereof, wherein the crucible is divided into three parts including an upper part, a middle part and a lower part, wherein the upper part is a hollow cylindrical cavity; the middle part is an air venting hole layer; and the lower part is a connecting layer. Devices used for the preparation method comprise a carbon-graphite die, a graphite core and a wood needle, and the preparation method comprises two parts, namely knotting and sintering, and comprises the following steps of: preparing ramming materials; adding the ramming materials into the carbon-graphite die gradually in weight; adding materials, and ramming; inserting the graphite core into the carbon-graphite die after the wood needle is submerged into the materials; then adding materials gradually in weight and knotting; taking a graphite conical plug at the lower part and the graphite core at the upper part out, putting the graphite conical plug and the graphite core into a heating furnace, sintering the graphite conical plug and the graphite core, controlling the temperature rising speed at 20-25 DEG C / min, and keeping the temperature at the environment of 1200-1300 DEG C for 1-2 hours, and then lowering the temperature; and demolding the crucible and forming. According to the invention, the special-shaped crucible is knotted and sintered, parameters can be changed flexibly, and the preparation is simple and practical, the processing cost can be lowered, and the special-shaped crucible for steel-making bottom blowing and the preparation method thereof are suitable for being used in a great number of complex experiments.

Description

technical field [0001] The invention belongs to the field of manufacture and application of a steelmaking crucible, in particular to a special-shaped crucible for steelmaking bottom blowing and a manufacturing method thereof. It is especially suitable for bottom blowing nitrogen in the smelting process of various steel types such as high nitrogen steel. Background technique [0002] Crucible is an essential container for smelting scientific experiments. It is mainly used to hold liquid metallurgical slag or iron material at high temperature to meet the needs of high temperature smelting and solidification. It is generally composed of refractory materials and is divided into three types: alkaline, neutral and acidic. . Universities, scientific research institutes and technical centers, in order to carry out projects related to smelting, need to use a large number of complex crucibles in the laboratory, and the shape and function of the crucibles required by different project...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problems of difficult processing and poor ventilation efficiency of the laboratory crucible in the prior art, and the conventional crucible cannot meet the functions required for the experiment, resulting in difficult experiments and high smelting costs. First, to provide a structure Simple and practical, low processing cost, suitable for a large number of complex experiments, a special-shaped crucible for steelmaking bottom blowing that significantly improves the efficiency of gas bottom blowing; the second is to provide a method that is easy to control, accurate and convenient to process, and is made of wooden needles. It is a sintered material with a wide range of sources and is obviously superior to other materials. The production method of the special-shaped crucible for steelmaking bottom blowing

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