Iron ore sintering test method

A sintering test, iron ore technology, applied in the field of metallurgy, can solve the problems of jumping, large horizontal spacing, poor reproducibility of test results, etc., and achieve the effect of shortening test time and reducing energy consumption

Inactive Publication Date: 2009-09-16
PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many experimental optimizations that are often obtained by experiments in a large range of factors, the horizontal spacing is too large, and too few experimental points affect the experimental results
In some experiments, when the horizontal distance changes too much, jumps often appear, and it is difficult to find out the continuity rule, or the best results may exist outside the experimental range
[0007] 4. The test conditions of the sintering cup are difficult to control, and the reproducibility of the test results is poor
At present, there are no relevant reports in the field of sintering and ironmaking that comprehensively and systematically adopt uniform design and creatively carry out experimental research.

Method used

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Embodiment 1

[0080] The iron ore sintering test method of the present invention will be further described below in conjunction with the limonite sintering test.

[0081] As we all know, limonite is a refractory ore containing crystal water (Fe 2 o 3· nH 2 O), the sintering performance is poor. Practices at home and abroad show that limonite has poor sintering strength, low yield and high solid fuel consumption. However, the price of limonite is relatively cheap, and the grade will increase after burning, which will help to improve the furnace grade and reduce costs, and will also help alleviate the shortage of high-grade iron ore resources.

[0082] Therefore, in view of the special characteristics of sintering, the study of limonite sintering performance must examine four factors: limonite ratio, fuel ratio, mixture moisture, and material layer thickness. If a full factorial multi-level complete test is used, the number of tests will increase dramatically or even be unacceptable. The...

Embodiment 2

[0138] The present invention also utilizes uniform design to optimize known models. Specifically, using conventional methods for optimization is also effective for models with extreme values. For many models, there are no extreme values ​​or small values, and it is very difficult to optimize in this case.

[0139] Uniform design is mainly used for experimental design, but uniform design can also be used to optimize parameters for experiments and production processes where the mathematical model is known. This method is called uniform design computer experiment. This kind of optimization is not to arrange experiments to study the reaction mechanism between factors, but to use this method to find parameters that meet the conditions more quickly and easily. For example, the sinter strength model that the inventor obtains by regression to a certain iron and steel plant is:

[0140] y ^ = 0.00183592 x ...

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Abstract

The invention discloses an iron ore sintering test method which includes steps as follows: confirming object and influence factor of the iron ore sintering test method for processing multi-factor multi-level test; selecting suitable uniform design test method for confirming a used uniform design table; processing iron ore ingredient, mixing, igniting and air suction sintering test according with the confirmed uniform design table for obtaining a series test result; utilizing the test result corresponding to the factor level of the uniform design table for analyzing, using method of direct preferential and model optimum for confirming an optimum parameter combination of the iron ore sintering, and processing must validated test. The method can shorten test time, reduce energy consumption and obtain test result with high efficiency and high quality.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular, the invention relates to an iron ore sintering test method. Background technique [0002] Sintering process parameters are closely related to the quality and output of sinter. Therefore, choosing better process parameters plays a very important role in reducing sintering costs and saving energy. [0003] The sintering process is a complex physical and chemical process, and the factors affecting sintering are also very complicated. Therefore, in order to obtain the best sintering process parameters, a large number of sintering experiments are needed to optimize. Sintering test is the basis for guiding sintering design and optimization of production process conditions, and is also an important part of sintering research. However, there are many links in the sintering test process and the workload is heavy. Therefore, in order to shorten the test cycle and save test costs, the number of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
Inventor 蒋大均何木光林千谷
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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