A Optimizing Method of Rational Blast Furnace Comprehensive Charge Ore Mixing Ratio
A technology of comprehensive charge and ore blending ratio, applied in blast furnaces, blast furnace details, furnaces, etc., can solve problems such as deterioration of smelting conditions, shutdown of blast furnaces, failure to consider the price of agglomerated finished ore metallurgical properties, etc., to avoid deterioration of smelting conditions Effect
Active Publication Date: 2017-06-20
NANJING IRON & STEEL CO LTD
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[0004] The comparison method of the above reasonable comprehensive charge ore ratio is based on a reasonable comprehensive charge structure (the Sintering Pellet Research Office of Beijing University of Science and Technology has conducted a comparative and systematic study on the comprehensive charge structure of blast furnaces in some domestic iron and steel plants) It is optimized within the scope of the blast furnace, and fully considers the resource conditions of the blast furnace in the factory, the technical level of ore processing and the equipment status, so it is correct to a certain extent; however, first of all, it is a test of industrial blast furnace The optimization and comparison process of the most original ore ratio of the equipment has the risk of damaging the blast furnace equipment; second, it does not take into account the price of the agglomerated finished ore and its metallurgical properties, especially the metallurgical properties of it, thinking that it can obtain a large Optimal ore blending comparison within the ore blending ratio range of the ore blending mode with good pig iron smelting effect can ensure that the proposed blast furnace production blending ratio can obtain the ideal blast furnace production technical and economic indicators, ignoring the impact of the metallurgical properties of the comprehensive charge on blast furnace production Facts have proved that even if the ironmaking production is carried out within the ore ratio range of the ore blending mode that can obtain a good pig iron smelting effect, the smelting conditions will deteriorate, and the charge with poor metallurgical properties may even cause blast furnace Stop production; thirdly, compare the technical and economic indicators of blast furnace production obtained after the event with the expected value to achieve efficiency calculation, that is, use the technical and economic indicators of blast furnace production obtained after the event as the basic data for efficiency calculation, which must make a blast furnace production ratio After the implementation, it will be possible to obtain various technical and economic indicators. On the one hand, this will cause a long period of efficiency calculation, and a poor ore ratio may cause production losses. On the other hand, due to the impact There are many factors in the technical and economic indicators of blast furnace production obtained after the event. Among the contributions to the technical and economic indicators obtained after the event, it can be considered that the ore blending ratio is the main one, but it cannot be said to be all. Therefore, good calculation efficiency cannot accurately indicate that it is the ore blending ratio. than the optimized result
[0005] It can be seen that the above method is a helpless move in the absence of a reasonable optimization method for the comprehensive furnace charge ore ratio. There is no simple and feasible method in the prior art that can overcome many problems in the above method. method
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Embodiment 1
[0049] This embodiment is a preferred method for a reasonable blast furnace comprehensive charge ore proportioning ratio, comprising the following steps:
[0050] (1) Select the ore blending ratio with better ore blending efficiency to ensure that the comprehensive charge of the blast furnace has good metallurgical properties, specifically:
[0051] ① The low-temperature reducing pulverization property of suitable mixed blast furnace charge, that is, to ensure the following formula:
[0052]
[0053] The calculated value is required to ensure the stability of the upper part of the blast furnace. In the formula, R: low-temperature reduction pulverization RDI% of the mixed charge; R i : RDI% of the low-temperature reducing pulverization property of a single charge; N i : the fraction of single charge in the mixed charge; n: the number of types of single charge contained in the mixed charge;
[0054] ②Suitable high-temperature reducibility of mixed blast furnace charge, that...
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The invention relates to an optimization method of a reasonable comprehensive furnace burden ore matching ratio of a blast furnace. The influence of the metallurgic performance of the comprehensive furnace burden on the production technical and economical index of the blast furnace is adequately considered, the worsening, caused by the furnace burden with poor metallurgic performance, of a smelting condition, and the probability of the production halt of the blast furnace can be avoided; the ore matching ratio is optimized on multiple aspects, and the requirements of the reasonable comprehensive furnace burden structure on multiple aspects can be met, under the condition of no loss of production, the reasonable comprehensive furnace burden structure can be positioned by utilizing a relatively short time, and the optimum furnace burden matching ratio suitable for operating the blast furnace in the reasonable comprehensive furnace burden structure can be obtained.
Description
technical field [0001] The invention belongs to the technical field of blast furnace ironmaking, and in particular relates to an optimal method for a reasonable ratio of blast furnace comprehensive charge ore blending. Background technique [0002] At present, after comparative and systematic research on the blast furnace comprehensive charge structure of some domestic iron and steel plants, it is believed that a reasonable comprehensive charge structure is determined by resource conditions, ore processing technology level and equipment status, as well as the price of agglomerated finished ore and its metallurgical properties; Therefore, it is a complex system engineering to find a reasonable comprehensive charge structure, and it is even more difficult to solve the technical problem to find the best matching ratio suitable for the operator's own blast furnace in the reasonable comprehensive charge structure. [0003] Since the "comprehensive blast furnace charge blending mo...
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IPC IPC(8): G06F19/00C21B5/00
Inventor 刘晓丹刘浩
Owner NANJING IRON & STEEL CO LTD