Steel smelting synthetic slag and production method thereof

Abstract

The invention relates to a steel smelting synthetic slag and a production method thereof. The steel smelting synthetic slag is characterized by being produced from the following components in percentage by weight: 61 percent of CaO, 20 percent of Al2O3, smaller than or equal to 3 percent of SiO2, smaller than or equal to 1 percent of Fe2O3, smaller than or equal to 1 percent of MgO, smaller than or equal to 0.03 percent of P, smaller than or equal to 0.01 percent of S, smaller than or equal to 2.5 percent of CaF2 and smaller than or equal to 10 percent of water. The production method of the steel smelting synthetic slag comprises the following steps of adopting the raw materials according to the weight ratio: 61kg of the CaO and 20kg of the Al2O3, grinding into powder, adding the raw materials according to the weight ratio: 10g of the water, 3kg of the SiO2, 1kg of the Fe2O3 and 1kg of the MgO, and pelletizing with the granularity to be 50mm; and burning at high temperature of 1300-1500 DEG C for 3h in the furnace to obtain the steel smelting synthetic slag. The steel smelting synthetic slag is a sintered type smelting synthetic slag which is not liable to crush and pulverize, small in dust in the using process, good in mobility, little in material loss, rapid in melting, good in effect, small in energy consumption and low in production cost and is beneficial to environmental protection.

Description

technical field [0001] The invention belongs to a refining technology of iron and steel smelting synthetic slag, in particular to an iron and steel smelting synthetic slag and a production method thereof. Background technique [0002] At present, ladle refining has become a process in modern steel production. In the process of ladle refining, since the synthetic slag refining technology can reduce the content of oxygen, sulfur and inclusions in steel, it has been widely used. In the production of traditional ladle refining furnaces, synthetic slag is usually divided into three types: mixed type, press-formed and pre-melted type. The mixed type is made by mixing various raw materials according to the ratio. During transportation and storage, it is easily broken and pulverized. Therefore, the dust in the process of use is large, the material loss is large, the melting is slow, and the environmental pollution is serious; the pressed molding is A high-pressure molding machine i...

AI Technical Summary

Problems solved by technology

The mixed type is made by mixing various raw materials according to the ratio. During transportation and storage, it is very easy to be broken and powdered. Therefore, the dust is large during use, the material loss is large, the melting is slow, and the environmental pollution is serious; the pressed molding is A high-pressure molding machine is used to press into balls. Although the balls have high strength, uniform particle size and high ball forming rate, there is a problem of pellet powdering, and the investment in equipment is large; After weighing and mixing, it is melted at high temperature and then cooled. Although there is no crushing and pulverization in the process of transportation and storage, it consumes more energy and has higher production costs.