A Method for Determination of Microphase in High Titanium Type Blast Furnace Slag

Abstract

The invention belongs to the technical field of mineral microcosmic element identification and in particular relates to a method for determining a microcosmic phase in high titanium type blast furnace slag. The method provided by the invention comprises the following steps: a, mixing blast furnace slag powder and consolidation liquid; drying and curing; grinding and polishing to obtain a blast furnace slag polished sheet; b, selecting a region to be tested in the blast furnace slag polished sheet under an optical microscope and dropwise adding an etching solution; observing the change of the region to be tested in the blast furnace slag polished sheet before and after etching; c, under a reflected light mode of the optical microscope, carrying out photomicrograph on the region to be tested in the blast furnace slag polished sheet before and after etching; comparing pictures obtained by photomicrograph before and after etching and distinguishing the microcosmic phase in the blast furnace slag. The method provided by the invention is simple to operate and high in stability; the difficulty that a thin sheet is difficult to manufacture by metallurgy minerals is avoided and the method has relatively high practicability.

Description

technical field [0001] The invention belongs to the technical field of mineral microelement identification, and in particular relates to a method for measuring microscopic phases in high-titanium blast furnace slag. Background technique [0002] Panzhihua Iron and Steel produces 3.2 million tons of high-titanium blast furnace slag every year. Except for a small amount used as building materials, most of them are piled up in the slag yard, which not only wastes precious titanium resources, but also takes up a lot of land. Therefore, research on high-titanium-type blast furnace slag The comprehensive utilization of blast furnace slag has important economic value and social value. The comprehensive utilization of high-titanium blast furnace slag in Panzhihua Iron and Steel Co., Ltd. has been studied since the 1960s. Although some progress has been made, the utilization rate and cost are too high to consume a large amount of waste slag. According to the research results, it is ...

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Problems solved by technology

[0004] Panzhihua Iron and Steel's blast furnace slag smelting technology has matured after decades of process adjustments, but there are still problems such as incomplete separation of slag and iron, foaming, and poor metallurgical properties such as slag viscosity. The research on the metallurgical properties of blast furnace slag is only limited. The study of the influence of chemical composition on it has little effect; in addition, the useful element Ti reserves in blast furnace slag is relatively large, and there is currently no method to effectively recover titanium from blast furnace slag, so as to realize the efficient utilization of titanium resources in blast furnace slag First of all, it is necessary to clarify the differences in their microscopic basic properties. Through chemical analysis, it can be known that a series of complex titanium-containing phases will be generated during the extraction of titanium from high-titanium blast furnace slag. To make a comprehensive analysis of the phases, especially to clarify the existence form of titanium in each phase, and to effectively distinguish the titanium-containing phases is an important link in the phase identification of high-titanium blast furnace slag

[0005] Domestic research data on the microscopic phase structure characterization of high-chromium blast furnace slag is relatively scarce. Zhu Jianyang of Chongqing University simulated the addition of Cr 2 o 3 The impact on perovskite and titanium spinel in blast furnace slag; and the distinction between titanium-rich diopside, titanium-diopside and glassy with higher titanium content is rarely reported

Since the reflectivity of the three is almost the same under the microscope, and most of them are embedded in the glassy phase, the glassy phase fills the cracks and the gaps between the grains of titanium-rich diopside and titanium-diopside, so that the mineral aggregates are connected into one. One piece, the internal structure of the grains and the boundaries between the grains cannot be seen. Under the electron microscope, due to the same reason, the three have the same gray value and cannot achieve a good identification effect.

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