A kind of green environmental protection gun mud for submerged arc furnace iron taphole and preparation method thereof

Abstract

The invention specifically relates to a green and environment-friendly gun clay for a submerged arc furnace taphole and a preparation method thereof. Its technical scheme is: first use 45-65wt% bauxite, 5-15wt% kyanite, 5-15wt% quartz fine powder, 1-3wt% andalusite fine powder, 10-30wt% oxidation Aluminum fine powder, 0.5-2wt% montmorillonite fine powder, 1-2wt% elemental silicon fine powder, 0.5-1wt% earthy graphite fine powder and 1-2wt% Ti 3 SiC 2 Fine powder is used as the raw material, and 0.05-0.1 wt% of polypropylene fiber, 0.05-0.3 wt% of retarder, and 0.5-2 wt% of ZrOCl are added to the raw materials 2 ·8H 2 O and 8-20wt% aluminum dihydrogen phosphate aqueous solution are wet-milled for 15-30 minutes, and then the mud is extruded by a mud extruding machine to obtain green environmental protection taphole mud for submerged arc furnace tapholes. The invention is low in cost and friendly to the environment, and the green and environment-friendly gun mud for the taphole of the submerged arc furnace has the characteristics of high strength, good volume stability, excellent erosion resistance, excellent corrosion resistance and the taphole can be repaired.

Description

technical field [0001] The invention belongs to the technical field of refractory materials for tapholes of submerged arc furnaces. In particular, it relates to a green and environment-friendly taphole clay for a submerged arc furnace taphole and a preparation method thereof. Background technique [0002] The submerged arc furnace is an electric furnace that uses the energy of an electric arc to produce ferroalloys such as ferrosilicon, ferromanganese, ferrochrome and ferronickel. The smelting process is continuous feeding, and the molten iron alloy is discharged from the taphole intermittently. The refractory material for plugging the taphole of the submerged arc furnace is gun mud. In order to meet the requirements of use, it should have the following properties: (1) Good plasticity and cohesiveness, easy to squeeze into and fill the taphole channel; (2) Suitable Excellent porosity and pore size distribution, easy to discharge moisture and gas during use; (3) Good volume...

AI Technical Summary

Problems solved by technology

In recent years, a certain amount of research work has been carried out on the formulation and performance of blasthole clay for submerged arc furnaces at home and abroad, and chromium oxide blasthole clays have been developed. , low strength, poor volume stability, poor erosion resistance, and inability to effectively repair the taphole, etc.

Since the taphole of the submerged arc furnace has to be opened and filled several times a day, if the above-mentioned problems exist in the quality of the taphole mud, the hot molten iron and slag will have the effect of scouring and eroding the taphole taphole, and problems will occur during use. Reaming will occur in the iron hole, resulting in shallower iron hole, unstable iron flow, and unclean iron, which seriously affects normal production, and ultimately affects the service life and smelting output of the submerged arc furnace

In addition, the use of chromium oxide gun mud also poses a greater threat to the health and safety of humans and animals