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A Method for Predicting the Sulfur Content in Blended Coal Smelting Coke
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A technology that combines coal and sulfur content, applied in coke ovens, instruments, calculations, etc., can solve problems such as deviation of prediction results, and achieve the effects of improving prediction accuracy, eliminating the decrease in prediction accuracy and flexible use.
Active Publication Date: 2019-10-08
SHOUGANG CORPORATION
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Therefore, in the currently commonly used methods for predicting coke sulfur content, different single coals use the same sulfur conversion coefficient, which may lead to deviations in prediction results
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Embodiment 1
[0070] In the production of large coke ovens, Example 1 of the present invention predicts the method of sulfur content in blended coal smelting coke, using the sulfur content of a single type of coal and the conversion coefficient of sulfur content in the coking process of a single type of coal, the total coke rate and the amount of sulfur in the blended coal The matching ratio in the coke is used as a parameter to predict the sulfur content of the coke, and the calculation method of the sulfur content of the blended coal smelting coke is as follows:
[0071]
[0072] In the formula:
[0073] St. 配焦 : Predicted value of sulfur content in blended coal smelting coke, %;
[0074] St. 单煤i : Sulfur content of single coal i, %;
[0075] K i : Total coking rate of single coal i coking, %;
[0076] x i : The mass proportion of single coal i in blended coal, %;
[0077] Y i : Sulfur conversion coefficient of single coal i;
[0078] a: Correction value, used to correct the e...
Embodiment 2
[0092] In the production of large coke ovens, the method for predicting the sulfur content of blended coal smelted coke described in Example 2 of the present invention is as follows:
[0093]
[0094] In the formula:
[0095] St. 配焦 : Predicted value of sulfur content in blended coal smelting coke, %;
[0096] St. 单煤i : Sulfur content of single coal i, %;
[0097] K i : Total coking rate of single coal i coking, %;
[0098] x i : The mass proportion of single coal i in blended coal, %;
[0099] Y i : Sulfur conversion coefficient of single coal i.
[0100] a: Correction value, used to correct the error between coking test and large coke oven production.
[0101] The sulfur content of the corresponding coke is predicted from the relevant data of multiple coal blending schemes, and then compared with the sulfur content of the coke produced by the large coke oven in actual production, the average value of all differences is the correction value a.
[0102] The sulfur...
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Abstract
The invention provides a method for predicting sulfur contents in mixed coal coking. According to the method, the sulfur contents of single-kind coal, the sulfur content conversion coefficient of the single-kind coal in the coking process, the total coke rate and the use proportion in the mixed coal are used as parameters for predicting the sulfur content in the mixed coal coking. According to a prediction calculation method of the sulfur contents in the mixed coal coking, the formula shown as the accompanying drawing is used. The method provided by the invention has the advantages that the differences of different single-kind coal after the coke smelting are sufficiently considered; the defect that in the prior art, the sulfur content conversion coefficient of different kinds of coals are determined into a fixed value in a certain interval according to an empirical formula is overcome; meanwhile, the errors between the small coke oven coking test results and a production coke oven are considered, the prediction results are corrected; the prediction precision is greatly improved; the prediction model has general applicability; the prediction precision reduction caused by too great coal distribution scheme change is avoided.
Description
technical field [0001] The invention relates to the technical field of blended coal coking, in particular to a method for predicting sulfur content in blended coal smelted coke. Background technique [0002] Coke is one of the raw materials for blast furnace smelting. Coke is made from coking coal through drying, pyrolysis, melting, bonding, solidification, shrinkage and other stages, that is, high-temperature coking (high-temperature dry distillation). Coke obtained from high temperature coking is used for blast furnace smelting, casting and gasification. The performance index of coke affects the operation of the blast furnace, and the sulfur content of coke increases by 0.1 percentage points, and the fuel ratio of the blast furnace increases by 1.5% to 2%. Therefore, the sulfur content of coke is one of the strictly controlled indicators in the blast furnace smelting process. [0003] In order to accurately control the sulfur content in coke, it is necessary to have a co...
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