Slag regulating agent for super high power large electric furnace smelting

A technology of electric furnace smelting and slag adjusting agent, which is applied in electric furnaces, furnaces, furnace types, etc., can solve the problems of uneven carbon powder spraying by carbon oxygen guns, high total iron content in furnace slag, and short duration of foamed slag. The effect of prolonging furnace life, improving yield of tapping alloy and improving dephosphorization ability

Active Publication Date: 2006-06-07
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

[0002] For ultra-high-power large electric furnaces equipped with slag door water-cooled carbon-oxygen guns but no furnace wall carbon-oxygen spray guns, carbon-oxygen gun spray carbon powder is generally uneven, and the amount of carbon powder sprayed is insufficient, resulting in uneven foam slag in the furnace , the foam slag has the c

Method used

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  • Slag regulating agent for super high power large electric furnace smelting

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Experimental program
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Embodiment

[0011] See Table 1 and Table 2. Table 1 is the summary table of test data; Table 2 is the composition of the electric furnace slag adjustment agent corresponding to the test number in Table 1.

[0012] Table 1

[0013]

[0014] Corresponding test serial number

[0015] The above-mentioned embodiment is carried out in the smelting process of a 150-ton ultra-high-power large electric furnace. About 1 ton of slagging agent is added into the furnace through the furnace top charging system in 3 to 4 batches after the power consumption is about 25000Kwh (if possible, it can be The effect is better if it is added continuously), the added slag adjusting agent is combined with the carbon powder sprayed by the slag door carbon gun to create foam slag uniformly and stably in the furnace, and reduce FeO and Fe in the slag 2 o 3 and other oxides, so that the average total iron content in the slag in the electric furnace dropped from 36.30% in a cert...

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Abstract

The present invention relates to super high power arc furnace smelting technology, and is especially slag regulating agent for super high power large electric furnace. The present invention features that the slag regulating agent consists of C 30-35 wt%, Al 5-7 wt%, MgO 8-10 wt%, Al2O3 10-12 wt%, CaO 20-25 wt%, SiC 9-10 wt% and impurity the rest, and has bulk density of 1.8-2.0 g/cu cm. The slag regulating agent of the present invention can form homogeneous foamed slag continuously in the furnace to reduce FeO, Fe2O3, etc. in the slag layer, raise smelting yield, raise steel alloy yield, raise the heat efficiency of the furnace, lower power consumption, raise the dephosphorization capacity of the furnace and prolong the service life of the furnace.

Description

(1) Technical field [0001] The invention relates to an ultra-high-power electric arc furnace smelting technology, in particular to a slagging agent for ultra-high-power electric arc furnace smelting. (2) Background technology [0002] For ultra-high-power large electric furnaces equipped with slag door water-cooled carbon-oxygen guns but no furnace wall carbon-oxygen spray guns, carbon-oxygen gun spray carbon powder is generally uneven, and the amount of carbon powder sprayed is insufficient, resulting in uneven foam slag in the furnace , The foam slag has the characteristics of short duration and poor stability, which often cause the problems of high total iron content in the furnace slag, low smelting yield and serious blowing damage. It is a better solution to add slag regulator while smelting, but there is no report about this in the existing ultra-high power large electric furnace smelting. Adding the final slag adjusting agent for converter smelting is reported, as pu...

Claims

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Application Information

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IPC IPC(8): C21C5/54C21C5/52C21C7/076
CPCY02P10/20
Inventor 罗建江周雅明顾文兵
Owner BAOSHAN IRON & STEEL CO LTD
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