Determination of the influence of dispersion of iron-containing component on technological properties of molding and rod mixtures.

Abstract

The presented results of researches of choice of rational method of receipt of ferruginous constituent of different dispersion are in bullet mills for formings and cored Iron-phosphatic a mixture of KHTS, and also influence of dispersion of dross on durability at the clench of mixture of this type.It was found that to obtain a highly dispersed iron-containing component of phosphate КHTS in the current production is the most rational use of mechanical method - ie grinding in ball mills, as it is effective both technologically and economically, given including the prevalence of this type of equipment. Each of the scale samples was loaded into a ball mill according to the instructions and ground for 40 minutes. Every 5 minutes, the mill was stopped and a sample weighing 100 grams was taken, after which the particle size distribution of the scale in this sample was determined. According to the literature, there is no generally accepted classification according to the particle size distribution [7]. This is due to the variety of purposes for which the particle size distribution of a material is determined. The particle size distribution of various materials is set by standards and technical conditions, which are developed for each individual consumer of this raw material. The normative document for determining the particle size distribution of metallurgical plants is currently unknown. The granulometric composition of rolled scale after grinding it in a ball mill was determined. The specific surface area of scale at the level of 2300-2500 m2 / g is achieved after 20 minutes of grinding in ball mills, which confirms the technological feasibility of their use for grinding the metal component of iron-phosphate HTS. The obtained data on a sufficiently high compressive strength of samples of iron-phosphate mixture, reaching 3.5 - 4 MPa, and is quite acceptable for use in the mixture for the production of bulk sand molds and rods, showed the prospects for further research in this direction .