Slow-release high-efficiency carbon-based converter temperature-raising agent and preparation method thereof

Abstract

The invention relates to the technical field of temperature-raising agents, in particular to a slow-release high-efficiency carbon-based converter temperature-raising agent and a preparation method thereof. The temperature-raising agent is mainly prepared from the following raw materials in parts by weight: 70 to 85 percent of pulverized coal, 10 to 20 percent of caustic-burned magnesia powder, 10to 15 percent of aluminum ash, and an adhesive necessary for forming the temperature-raising agent; the particle size of the temperature-raising agent is 30mm to 60mm; and the temperature-raising agent is in a spherical shape or an ellipsoidal shape. The temperature-raising agent provided by the invention is prepared through adding the caustic-burned magnesia powder, selecting the appropriate adhesive, and using a ball press machine, so that the strength of the temperature-raising agent is greatly improved, the compactness of the temperature-raising agent is improved, and the problem of pooreffect in use caused by low strength and density of an existing temperature-raising agent is solved; and according to the temperature-raising agent provided by the invention, through adding the caustic-burned magnesia powder, the corrosion speed of the temperature-raising agent in molten iron and semisteel is effectively delayed.

Description

technical field [0001] The invention relates to the technical field of temperature-raising agents, in particular to a slow-release high-efficiency carbon-based converter temperature-raising agent and a preparation method thereof. Background technique [0002] At present, increasing the scrap ratio and reducing the unit consumption of molten iron is one of the main measures for domestic converter steelmaking plants to increase production, reduce costs and increase efficiency. However, with the increase in the ratio of scrap steel, the physical heat and chemical heat input to the converter raw materials are reduced, which cannot meet the requirements of smelting. If necessary, additional use of warming agents to supplement heat becomes a necessary means. The main exothermic components of the temperature raising agent currently used in the converter are C, Si, SiC, Al, or a combination of the above elements, and the form is mainly in the form of block or briquette. However, th...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a slow-release high-efficiency carbon-based converter temperature-raising agent and its preparation method for the above-mentioned technical deficiencies. The temperature-raising agent is mainly made of the following raw materials in parts by weight : 70-85% of coal powder, 10-20% of lightly burned magnesium powder and 10-15% of aluminum ash, and the necessary binder for forming the temperature-raising agent; the particle size of the temperature-raising agent is 30mm-60mm; The temperature-raising agent is spherical or ellipsoidal; the temperature-raising agent of the present invention is prepared by adding light-burned magnesium powder and selecting a suitable adhesive, and using a ball press, so that the strength of the temperature-raising agent is greatly improved, and its density is improved. , which solves the problem that the existing temperature-raising agent has low strength and density, which leads to poor effect in use; the addition of light-burned magnesium powder in the temperature-raising agent of the present invention effectively delays the temperature-raising agent in molten iron and semi-steel Dissolution rate

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