Pellet multifunctional ore blending model building method

Abstract

The invention discloses a multifunctional pellet ore blending model building method, and relates to the technical field of sintering and pelletizing. The pellet multifunctional ore blending model building method is characterized by comprising the following specific operation steps: S1, calculating the oxidation reaction weight gain rate of the FeO content of magnetite concentrate; according to the pellet multifunctional ore blending model building method, the pellet multifunctional ore blending model is designed based on the oxidizing roasting theory of magnetite concentrate pellets, and besides the consumption cost of several main components and raw materials of the pellets is calculated, the pellet multifunctional ore blending model is built; the adaptability of the pellet batching model to magnetite concentrates with different FeO contents, different raw material-200 mesh proportions, different raw material S contents and different alkali metal contents is improved, and the comprehensiveness and accuracy of the pellet batching model on pellet quality prediction are improved; the pellet ore blending structure is evaluated from multiple angles and multiple functions of pellet quality, bentonite unit consumption, process energy consumption, environmental protection, cost and the like.

Description

technical field [0001] The invention relates to the technical field of sintered pellets, in particular to a method for building a multifunctional ore blending model for pellets. Background technique [0002] Compared with the sintering process, the pelletizing process has obvious advantages in energy saving, low carbon and exhaust emission. 1. The energy consumption of pelletizing process is more than 40% lower than that of sintering process; 2. Its flue gas emission is only about 75% of that of sintering, and SO2 per ton of pellets 2 and NO x The emissions are only 1 / 2 and 1 / 3 respectively, so the environmental protection investment and operating cost of pellet production are lower than that of sintering; 3. The sinter is bonded by liquid phase, and the ideal gas permeability of the material layer is the key to the smooth progress of the sintering process. , an appropriate proportion of internal carbon is essential; and the pellets are solid-phase roasted and consolidated...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method for building a pellet multifunctional ore blending model, which solves the problem that in the prior art, most of the pellet blending models are inversely calculated based on raw materials and pellet components , there is no rigorous calculation according to the pellet theory, and there is often a large error between the theoretical composition value of the pellets and the actual value, resulting in poor adaptability of the pellet blending model. Since most of the raw materials of the pellets are magnetite concentrates, magnetite concentrate The weight of the ore increases due to the oxidation of FeO during roasting. According to preliminary calculations, the weight of the dry-based pellets increases by about 2%, and the weight gain has a great impact on the calculation of the theoretical composition of the pellets.

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