253 results about "Liquid iron" patented technology

The invention provides a blast furnace liquid iron quality online forecasting system and method based on a multivariable online sequential extreme learning machine. The forecasting system is composed of a conventional measurement system, a data acquisition unit, M-OS-ELM online forecasting software and a computer system for running the software. The forecasting method comprises the following steps of (1) auxiliary variable selection and model input variable determination; and (2) M-SVR soft measurement model training and utilization. According to the forecasting system and the forecasting method, a multivariable liquid iron quality forecasting model having output self-feedback and considering the timing sequence and time lag relation of input and output is established by use of the online process data provided by the conventional detection system and based on the M-OS-ELM intelligent modeling technology, and the multivariable online dynamic determination of four major liquid iron quality indexes, namely Si content, P content, S content and liquid iron temperature, is realized simultaneously; in short, the model has the characteristics of good practicability, more accurate measurement effects and stronger generalization ability.

The invention relates to a secondary cold-rolled sheet with high hardness and plane isotropy and a manufacturing method thereof, which are particularly suitable for steel for making an unscrewing cover, a shallow drawn can and the like with low earing requirements. The secondary cold-rolled sheet comprises the following chemical element components in percentage by weight: 0.02 to 0.06 percent of C, less than or equal to 0.03 percent of Si, 0.10 to 0.30 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.015 percent of S, 0.03 to 0.10 percent of Al, less than or equal to 0.0035 percent of N and the balance of Fe and inevitable inclusions. The secondary cold-rolled sheet is prepared by the following steps of: pretreating the proportioned materials by using liquid iron; smelting in a converter; performing post-refining by using the converter; hot-rolling; performing acid washing; cold-rolling; continuously annealing; performing secondary cold-rolling; and finishing to obtain finished rolls, wherein a heating temperature is controlled to be less than or equal to 1,180 DEG C during the hot-rolling, the final rolling temperature is more than Ar3, and a coiling temperature is between 620 and 750 DEG C; cold-rolling deformation is controlled to be between 75 and 90 percent, and a continuous annealing temperature is between 640 and 700 DEG C; annealing time is between 50 and 150 seconds; secondary cold-rolling rate is between 15 and 35 percent, and other conditions meet the requirements of the conventional process; and an obtained product has the hardness of HR30T 60 to 80 and the earing rate of less than or equal to 5 percent.

Vegetation spray is performed with a magnetized material in a spray liquid. The magnetized material can be liquid iron. The magnetized material can be magnetized before or after introduction to the spray liquid, and before or after the spray liquid is introduced to spray equipment. Spray drift can be reduced and spray adhesion increased by the addition of the magnetized material to the spray liquid. Liquid with magnetized materials can also be used in other, non-spray applications.

The invention discloses a method for smelting high-titanium liquid iron by utilizing a converter. The method is mainly used for smelting the high-titanium liquid iron with the titanium mass percentage of 0.3 to 0.5 percent by utilizing the converter. By adopting a double-slag process, the binary basicity of the furnace slag on the preliminary smelting stage of the converter is 0.8 to 1.2, the mass fraction of TFe is 15 to 25 percent, the temperature of a smelting pool is 1370 to 1420 DEG C, and the slagging quantity can reach 50 to 60 percent, so that the problem that the melting point of the furnace slag is increased because the titanium in the liquid iron is oxidized and enters the furnace slag can be maximally reduced; the decarbonization is carried out according to the conventional converter smelting process. By adopting the production process, the melting point of the furnace slag on the preliminary smelting stage can be lowered, the mobility of the furnace slag is good, the overall phosphorus removal rate can reach more than 85 percent, and the splashing can be avoided.

The invention relates to a puddling additive which is prepared from the following materials by weight percent: 60-120 percent of boric sludge and 5-40 percent of calcium oxide. Adding the puddling additive in sintering and pellet materials can ensure stable operation of a blast furnace, increase the yield by as high as 6 percent, reduce coke ratio by 35kg / t iron, improve the quality of cast iron, reduce the sulphur content, increase the first-grade product rate, ensure abundant heat of slag iron and favorable flowability, reduce the iron condensing amount of liquid iron in the slag iron runner and liquid iron tank, lower the consumption of metal iron, make it easy to discharge iron slag, reduce the labor intensity for furnace men, reduce the consumption of auxiliary materials such as lime stone and reduce the blowout amount of furnace dust.