Preparation method of silicon-steel grade magnesium oxide

Abstract

The invention relates to the technical field of magnesium oxide production, and concretely relates to a preparation method of magnesium oxide. The method comprises the following steps: 1)placing the crude magnesium oxide powder in a container, adding pure water for blending, washing a blended slurry to remove impurities, 2)pumping the slurry into a revolving bed reactor for reacting to obtain a slip, 3)aging the slip and separating to obtain magnesium hydroxide, drying, and 4)placing magnesium hydroxide in a high temperature calciner, employing a dynamic calcining method for calcining to obtain the magnesium oxide particles, and crushing and grading to obtain the silicon-steel grade magnesium oxide. Compared with a traditional silicon-steel grade magnesium oxide, the silicon-steel grade magnesium oxide produced by the invention has the advantages of low impurity content, uniform and adjustable particle size particle size distribution, low hydration rate, good suspensibility and stable quality.

Description

Technical field [0001] The invention relates to the technical field of magnesium oxide manufacturing, in particular to a method for preparing magnesium oxide used in the production of silicon steel sheets. Background technique [0002] Silicon steel grade magnesium oxide is mainly used in the production of oriented silicon steel sheets. In a high temperature environment, magnesium oxide is first used as a tempering release agent for steel sheets to prevent the steel sheets from bonding. At the same time, magnesium oxide should form an excellent insulating film on the surface of the silicon steel sheet and the substrate, and can also remove sulfur in the silicon steel during high-temperature reactions. And phosphorus and other harmful impurities. [0003] Magnesium oxide produced by a general continuous process has many quality defects and cannot be used as a raw material for oriented silicon steel. In the traditional production process of silicon steel grade magnesium oxide, most...

AI Technical Summary

Problems solved by technology

[0003] The magnesium oxide produced by the general continuous process has many quality defects and cannot be used as a raw material for grain-oriented silicon steel.

In the traditional production process of silicon steel grade magnesium oxide, most of them use conventional reactors for production and preparation of semi-finished products, which have disadvantages such as low reaction temperature, difficult process control and discontinuous production process, resulting in large fluctuations in the quality of the produced products , there is a big gap with the international advanced production technology level, and it cannot meet the strict requirements of some demanding customers

Images