Combining system for low pressure moulding of continuous-casting three critical parts

Abstract

The invention belongs to the technical field of continuous-casting funcational refractory materials, and relates to a combining system for low pressure moulding of continuous-casting three critical parts. The combining system comprises a binding agent and a solvent. The binding agent is composed of phenolic resin powder and CarboresP, the adding amount of phenolic resin powder is 4-6 wt% of the total weight of the continuous-casting three critical parts, and the adding amount of CarboresP is 1.5-3 wt% of the total weight of the continuous-casting three critical parts. The solvent comprises alcohol and methyl mixed dicarboxylate, the adding amount of alcohol is 2-3 wt% of the total weight of the continuous-casting three critical parts, and the adding amount of methyl mixed dicarboxylate is 1.5-2.5 wt% of the total weight of the continuous-casting three critical parts. By controlling the adding amount of high-boiling-point solvents, the high-volatility composition needed by low-pressure molding of blank materials is regulated and controlled; by introducing the binding agent with high residual carbon rate, the densification of the products is guaranteed, also the high-temperature strength of the material is improved, so that the combining system has obvious economic benefit and social benefit.

Description

technical field [0001] The invention belongs to the technical field of continuous casting functional refractory materials, and mainly relates to a combination system for continuous casting and low-pressure forming of three large pieces. Background technique [0002] The three major components of continuous casting include the long nozzle for continuous casting, the integral stopper rod and the submerged nozzle, which are very important functional refractory materials in the continuous casting process. To control and divert molten steel, prevent the secondary oxidation of molten steel, and realize the continuous casting process. Usually, the three major parts of continuous casting select different carbon-containing materials according to the service conditions of different parts, mainly oxide materials (Al 2 o 3 , MgO, ZrO 2 , spinel) and graphite, and with the appropriate combination system in the isostatic press molding. [0003] The compactness of the three blanks depe...

AI Technical Summary

Problems solved by technology

However, as the pressure increases, the production efficiency of the three major products becomes lower, the energy consumption becomes larger, and the loss of the expensive isostatic press becomes more and more serious, see Table 1

The combination system of phenolic resin powder + alcohol is not conducive to low-pressure molding, because alcohol is a low-boiling solvent. Under this combination system, the high volatile content required for low-pressure densification of the green body is not easy to control, and high-volatile substances are re-formed during heat treatment. Pores, not conducive to the densification of the cooked body