Pre-molten low-melting point composite calcium aluminate desulfurizer and its prepn.

A low-melting, calcium aluminate technology, applied in the field of pre-melting low-melting composite desulfurizer and its preparation, can solve the problems of limited desulfurization, lower sulfur capacity coefficient, unfavorable deeper desulfurization, etc., and achieve shortened reaction time, sulfur capacity High coefficient, the effect of shortening the production cycle

Inactive Publication Date: 2003-01-08
盛富春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high content of S and Si in coke, its sulfur capacity coefficient is reduced, which limits its desulfurization effect, not only needs to increase the dosage, but also is not conducive to deeper desulfurization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] (1), proportioning: bauxite (based on Al 2 o 3 Content meter) 32%, calcium oxide 68%.

[0012] (2) Preparation: passivate the calcium oxide in advance, then mix the components according to the required ratio, melt in an electric furnace or a reverberatory furnace, and then crush it after cooling to prepare a granular or powdery desulfurizer.

Embodiment 2

[0014] (1), proportioning: bauxite (based on Al 2 o 3 Content meter) 46%, calcium oxide 54%.

[0015] (2) Preparation: passivate the calcium oxide in advance, then mix the components according to the required ratio, melt in an electric furnace or a reverberatory furnace, and then crush it after cooling to prepare a granular or powdery desulfurizer.

Embodiment 3

[0017] (1), proportioning: bauxite (based on Al 2 o 3 Content meter) 60%, calcium oxide 40%.

[0018] (2) Preparation: passivate the calcium oxide in advance, then mix the components according to the required ratio, melt in an electric furnace or a reverberatory furnace, and then crush it after cooling to prepare a granular or powdery desulfurizer.

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PUM

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Abstract

The invention discloses a kind of premelt-type, low-melting point, calcium aluminate complex desulfurizing agent and its preparation method, which is prepared according to the below components and proportion (weight): aluminum alum earth (calculated according to the Al2O3 content) 30-60%, and calcium oxide 40-70%. In advance perform passivating treatment on calcium oxide, then mix all the components according to the required proportion, then smelt them in the electric stove or the reflecting stove, then cool them, and by crashing, prepare the particle-shape or powder-shape desulfurizing agent. By the premelting treatment, the melting point of desulfurizing agent lowers to 1250-1400 centigrade, which obviously raises its desulfurizing rate in the molten iron molten steel and shortens the reactive time and production cycle.

Description

1. Technical field [0001] The invention relates to a desulfurizer used in the industrial production of molten steel (hot metal) and a preparation method thereof, in particular to a pre-melted low melting point composite desulfurizer and a preparation method thereof. 2. Background technology [0002] Existing desulfurizers are generally mechanical mixtures. Its main defect is that the active ingredients therein, such as calcium oxide, etc., have a high melting point (generally at 1900-2200°C), resulting in poor activity during use, and the effective utilization ratio is too low, generally around 10%. However, about 90% of the unreacted components are discharged in the form of waste residue, causing serious pollution to the environment. At the same time, due to the high melting point of the mechanical mixture, it is not easy to dissolve, which prolongs the reaction time of the desulfurization process and reduces the production efficiency to a certain extent. On the other han...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/064
Inventor 盛富春金东国
Owner 盛富春
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