Molten iron pretreatment slag collecting agent

Abstract

The invention discloses a slag-collecting agent of pre-treatment for molten iron, containing the following raw materials by weight percentage: 60-80 parts of perlite, 5-15 parts of potassium-sodium feldspar and 10-20 parts of white sand. Compared with the traditional technique, the invention has the advantages as follows: 1 the time of slag-raking is short, after the slag-collecting agent is added, the process furnace is slagged totally with good effect of slagging, slag appears big block to rake easily and completely; the time of slag-raking is 1/3 times that of slag-raking without the slag-collecting agent, the slag is completely raked, the quantity of slag in the molten iron is decreased, thus efficiently improving the condition of the molten iron entering furnace; 2 iron loss is little, after the slag-collecting agent is added, the iron loss of the iron slag is reduced from average 6.25kg iron per ton to below 1kg iron per ton; 3 the desulfurization degree of the molten iron is not influenced; 4 As the agent causes no pollution to environment in used, and is of no toxicity, no dust, no smell, convenient operation, wide source of materials and low cost, the requirements of steel plants can be fully met.

Description

1. Technical field: [0001] The invention relates to a slagging agent product for pretreatment of molten iron, which belongs to the slag collecting material for pretreatment and desulfurization of molten iron in the process of steelmaking and smelting. 2. Background technology: [0002] At present, the desulfurization process of molten iron in my country is being rapidly popularized and applied, but there are generally problems of large iron loss and difficulty in slag removal after desulfurization. In the pretreatment process of molten iron, when single-spray metal magnesium powder process is used for desulfurization, generally the top slag of the ladle is rare and thin, and it is difficult to remove the slag, which results in a long time for slag removal. The loss of slag and the serious loss of molten iron directly affect the output and consumption indicators of steel materials. At the same time, the molten iron slag after the pretreatment of molten iron has a high sulfur...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: to overcome the shortage of existing slag collecting materials, and provide an ideal hot metal pretreatment desulfurization slag collecting agent, which has the advantages of low cost, convenient use, appropriate viscosity, slag collecting into blocks, purification Hot metal, no pollution, easy to remove slag, greatly reduce iron loss, easy to transport, not limited by resources, can meet the urgent needs of the growing steelmaking for the quality of hot metal after hot metal pretreatment and desulfurization

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