Draining sand for steelworks and its preparing process

Abstract

The invention relates to a drainage sand, in particular to a quartz drainage sand for steelmaking and a preparation process thereof. The invention solves the defects of high price, miscellaneous composition and easy sintering and complicated manufacturing process of the existing drainage sand. The technical scheme of the present invention is: steelmaking drainage sand, in 100 parts, its weight ratio is: 90-95 parts of 10-50 mesh quartz sand, 1-2 parts of white mud, 1-3 parts of rice husk, 2 parts of graphite -3 parts, carbon black 1-2 parts. The preparation process is to fully dry mix each component for 3-5 minutes, fully mix each component with 8-10 parts of water in a mixer, and place the mixed drainage sand in an oven at 120°C-250°C to dry Baking for 2-3 hours is the finished steelmaking drainage sand. It is mainly used for plugging and drainage of the injection hole at the bottom of the ladle in steelmaking production.

Description

Technical field: [0001] The invention relates to a drainage sand, in particular to a quartz drainage sand for steelmaking and a preparation process thereof. Background technique: [0002] Drainage sand is mainly used for blocking and drainage of the injection hole at the bottom of the ladle. It is an indispensable refractory material for the ladle. Before injecting molten steel into the ladle, first use the drainage sand to block the flow hole, and then pour the molten steel; When the bottom injection hole is opened, the drainage sand in the hole must be able to fall down automatically so that the molten steel can flow down. Generally, the self-opening rate is required to be over 93%. At present, the domestic application number of "Drainage Sand for Ladle" is 96105218.x. Generally, more potassium feldspar is added to improve the lubrication of the drainage sand, but it has low refractoriness, poor collapsibility, high cost and complicated production process. and other defic...

AI Technical Summary

Problems solved by technology

At present, the domestic application number of "Drainage Sand for Ladle" is 96105218.x. Generally, more potassium feldspar is added to improve the lubrication of drainage sand, but it has low refractoriness, poor collapsibility, high cost and complicated production process. and other deficiencies; and the formula developed by the application number of "Drainage Sand" is 99114722.7. The main materials are forsterite and fused magnesia.