High-effective composite slagging agent used for converter and preparation method thereof
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A composite slag-forming agent and high-efficiency technology, applied in the direction of manufacturing converters, improving process efficiency, etc., can solve the problems of increasing power consumption in steelmaking production, reducing production efficiency, increasing production costs, etc. Production efficiency, fast slag melting effect
Inactive Publication Date: 2016-09-21
ANHUI YUNTIAN METALLURGY TECH
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The slagging agents currently on the market have the disadvantage of a relatively single component, which leads to a relatively long time for slagging, which greatly increases the power consumption of steelmaking production, greatly reduces production efficiency, and thus increases production costs.
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[0013] A high-efficiency composite slagging agent for converters, made of the following raw materials (kg): refining slag 18, leucite 22, refractory brick scrap 3, magnesite 6, cancryptite 15, bentonite 40, chalk Powder 8, steel slag 17, sillimanite 10, sanidine feldspar 7, white corundum powder 14.
[0014] A method for preparing a high-efficiency composite slagging agent for a converter, comprising the following steps:
[0015] (1) Mix leucite, refractory brick fragments, steel slag, and sanidine evenly, crush them, pass through a 100-mesh sieve, grind at a high speed of 4000r / min for 8 minutes, and then place them in a muffle furnace for calcination: first, at 8°C / min The temperature was raised to 580°C at a rate of 2 hours, and then the temperature was lowered to 260°C at a rate of 4°C / min, and the temperature was kept at 0.5h, and finally the temperature was raised to 680°C at a rate of 6°C / min, and the temperature was kept for 2.5h;
[0016] (2) Mix the refining slag, c...
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Abstract
The invention discloses a high-effective composite slagging agent used for a converter. The slagging agent is prepared from the raw materials including, by weight, 14-22 parts of refining slag, 18-26 parts of leucite, 10-15 parts of broken material of fireproof bricks, 4-9 parts of magnesia, 12-19 parts of cancrinite, 32-46 parts of bentonite, 5-10 parts of chalk powder, 15-20 parts of steel slag, 8-14 parts of sillimanite, 5-10 parts of sanidine and 9-18 parts of micro powder of white corundum. In the invention, the wastes, such as the refining slag, the broken material of fireproof brick and the steel slag are compounded with the leucite, the cancrinite, the bentonite and the like minerals, so that the slagging agent has good full-course slagging effect and short slagging time, and is high in desulfurization and dephosphorization efficiency. The industrial wastes, such as the refining slag, the broken material of fireproof brick and the steel slag, are recycled, so that not only is comprehensive utilization of secondary resources achieved but also the metallurgic effect in the converter is improved. The slagging agent is reduced in production consumption, is improved in production efficiency and has excellent promoting prospect.
Description
technical field [0001] The invention relates to a slagging agent and a preparation method thereof, in particular to a high-efficiency composite slagging agent for a converter and a preparation method thereof. Background technique [0002] Slagging is one of the main process operations in converter steelmaking. Steelmaking needs to reduce the impurities in the steel. These impurities are separated and enter the slag. Because the slag has a light specific gravity and floats on the molten steel, it is easier to remove. In addition, the slag can also protect the molten steel from direct contact with the atmosphere. Slagging is the addition of steelmaking substances called slagging agents during the steelmaking process in order to form slag. The slagging agents currently on the market have the disadvantage of relatively single components, resulting in a relatively long slagging time, which greatly increases the power consumption of steelmaking production, greatly reduces produc...
Claims
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