Method for computing uniformly-mixing efficiency in oiron ore powder uniformly-mixing operation

A calculation method and technology for iron ore powder, applied in the calculation field of mixing efficiency, can solve the problems of non-use, increase in numerical value, and far from the gap, and achieve the effect of accurate data

Inactive Publication Date: 2009-03-18
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] The disadvantage of this calculation method is that when the layers are correlated, as the correlation increases, The value of (KΔt) increases, so that the value of the second item in the square brackets of formula (5) increases significantly, so that the favorable factors brought by the increase in the number of layers are offset by this increase in correlation. In practical applications, obtaining raw materials The autocorrelation function is difficult, so the method is usually not used
[0039] This method actually admits that all the correction formulas cannot accurately reflect the objective facts, and seeks accuracy by weight, which is the culmination of repairing.
[0040] With the continuous development and improvement of production technology, the calculation methods for the mixing efficiency of the above iron ore powder mixing operations based on the simple process are crude and simple, and they are tinkered with the original method. The obtained results are far from the actual situation

Method used

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  • Method for computing uniformly-mixing efficiency in oiron ore powder uniformly-mixing operation
  • Method for computing uniformly-mixing efficiency in oiron ore powder uniformly-mixing operation
  • Method for computing uniformly-mixing efficiency in oiron ore powder uniformly-mixing operation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] The mixed raw materials in this embodiment are South African powder, Australian powder, Brazilian powder, Iranian powder, Brazilian fine powder, Russian fine powder, Peru fine powder, Meishan fine powder, Yeshan self-melting powder, New Zealand fine powder, Yangdi fine powder , Boron fine powder, iron oxide scale, gas ash, steel slag, sintering return ore, dolomite powder.

[0082] Tfe can be obtained by on-site testing, P (A) is calculated by P (A)=(10 / 7)Tfe, and the Tfe=60.7% measured in this embodiment, P(A)=(10 / 7)Tfe=86.71%.

[0083] Cp represents the degree to which the processing capacity of the mixing operation meets the technical requirements. Check the standard normal distribution function value table, 3Cp=1.81, Cp=0.6033.

[0084] t represents the technical requirement for the mixing operation, and t=0.008 in this embodiment.

[0085] n = p ( A ...

Embodiment 2

[0091] The mixed raw materials in this embodiment are South African powder, Australian powder, Brazilian powder, Iranian powder, Brazilian fine powder, Russian fine powder, Peru fine powder, Meishan fine powder, Yeshan self-melting powder, New Zealand fine powder, Yangdi fine powder , Boron fine powder, iron oxide scale, gas ash, steel slag, sintering return ore, dolomite powder.

[0092] Tfe can be obtained by on-site testing, and P(A) is calculated by P(A)=(10 / 7)Tfe, and the measured Tfe=60.4% in this embodiment, P(A)=(10 / 7)Tfe=86.71%.

[0093] Cp represents the degree to which the processing capacity of the mixing operation meets the technical requirements. It is obtained from the standard normal distribution function value table, 3Cp=1.15, Cp=0.3833.

[0094] t represents the technical requirement for the mixing operation, and t=0.008 in this embodiment.

[0095] n = p ( ...

Embodiment 3

[0101] The mixed raw materials in this embodiment are South African powder, Australian powder, Brazilian powder, Iranian powder, Brazilian fine powder, Russian fine powder, Peru fine powder, Meishan fine powder, Yeshan self-melting powder, New Zealand fine powder, Yangdi fine powder , Boron fine powder, iron oxide scale, gas ash, steel slag, sintering return ore, dolomite powder.

[0102] Tfe can be obtained by on-site testing, and P (A) is calculated by P (A)=(10 / 7)Tfe, and the Tfe=60.1% measured in this embodiment, P(A)=(10 / 7)Tfe=85.86%.

[0103] Cp represents the degree to which the processing capacity of the mixing operation meets the technical requirements. It is obtained from the standard normal distribution function value table, 3Cp=1.75, Cp=0.5833.

[0104] t represents the technical requirement for the mixing operation, and t=0.008 in this embodiment.

[0105] n = p ( ...

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Abstract

The invention relates to a calculating method of proportioning efficiency, in particular to a calculating method of proportioning efficiency of an iron ore powder proportioning operation. The invention uses formulas to show the proportioning efficiency, the larger n is and the more proportioning times are, the better the proportioning effect is. The invention expresses better proportioning operation efficiency than the method of traditional standard deviation calculation to calculate proportioning, is easily accepted by operation workers, and is used for guiding the production on the spot. The invention adopts a plurality of operating parameters present in the proportioning production and the exact and easily obtained data reflects a real situation of the proportioning efficiency.

Description

technical field [0001] The invention relates to a calculation method of mixing efficiency, in particular to a calculation method of mixing efficiency in iron ore powder mixing operation. Background technique [0002] The mixing operation of iron ore powder has become an important process of modern iron and steel production technology. It can improve the output and quality of sintering and ironmaking products in the subsequent process, stabilize the sintering and ironmaking production process, realize computer control, use inferior resources, reduce fuel consumption. Iron and steel enterprises at home and abroad, no matter they are new enterprises or old enterprises, spare no expense to invest heavily in building large-scale modern iron ore powder mixing yards. While the technology and equipment are constantly improving, the most eye-catching focus is the mixing Calculation of efficiency. The calculation of mixing efficiency is a quantitative description of the importance o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/04
Inventor 刘晓丹刘浩
Owner NANJING IRON & STEEL CO LTD
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