Borax oxide remover for internal surface of hot continuous rolled steel pipe and method for preparing same

Abstract

A borax oxide remover for an internal surface of a hot continuous rolled steel pipe and a method for preparing the same belong to the technical field of hot continuous rolled steel pipes. The oxide remover comprises the following components of 53-58% of borax, 30-35% of sodium sulfate, 10-15% of reducing agent and 1-2% of fluxing agent according to mass percent content; and the maximum granularity of each component is less than or equal to 20 meshes. The preparation process of the borax oxide remover comprises the following steps of: preparing the reducing agent (sodium stearate), drying the borax, adding the fluxing agent and mixing together for granulating and screening, and then preparing the borax oxide remover. The method for preparing the borax oxide remover has the advantages that the problems of melt aggregation, high moisture content, poor blowing homogeneity and the like in the hot continuous rolling process can be solved; the quality of the internal surface of the steel pipe can be improved; the requirements on hot continuous rolling are met; and the method is moderate in cost, high in cost performance and suitable for population and application in the metallurgical field.

Description

technical field [0001] The invention belongs to the technical field of hot continuous rolling steel pipes, and in particular provides a borax deoxidizer for the inner surface of hot continuous rolling steel pipes and a preparation method thereof. Background technique [0002] In the production process of seamless steel pipe, the tube blank heated in the ring furnace is first perforated to make a hollow capillary tube, and then the capillary tube is sent to the continuous rolling mill to be inserted into the mandrel for rolling. After the tube blank is pierced, the inner cavity of the capillary tube is in contact with air, which inevitably produces oxidation, which will cause uneven scars on the inner wall of the steel pipe, which will seriously affect the quality of the steel pipe and the service life of the mandrel. Therefore, the inner wall of the capillary must be for deoxygenation. [0003] At present, there are two main processes for removing the oxide skin on the inne...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a borax deoxidizer for the inner surface of hot continuous rolling steel pipes and its preparation method, which solves the problems of melt aggregation, high moisture content and poor spraying uniformity in the hot continuous rolling process, and improves the inner surface quality of steel pipes