A method for estimating the moisture content of a sintering machine mixture according to the amount of water added

A technology of mixing materials and water addition, which is applied in the field of iron ore sintering, can solve the problems affecting the water distribution of sintering mixing materials, and achieve the effects of improving accuracy and objectivity, speeding up the formation process, and improving the effect

Active Publication Date: 2021-07-13
山东诺德能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is difficult to judge the moisture content of the mixture on the sintering machine according to the amount of water added, which affects the water distribution in the process of sintering the mixture

Method used

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  • A method for estimating the moisture content of a sintering machine mixture according to the amount of water added
  • A method for estimating the moisture content of a sintering machine mixture according to the amount of water added
  • A method for estimating the moisture content of a sintering machine mixture according to the amount of water added

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The raw materials used for sintering include iron-containing raw materials, flux and fuel. These raw materials all contain a certain amount of original moisture, but the moisture value cannot meet the requirements of sintering. Add moisture when mixing and secondary mixing. The main purpose of primary mixing is to add water to moisten and mix evenly, so that the water content, particle size and components in the material can be evenly distributed, while the secondary mixing should not only continue to mix, but also carry out supplementary wetting. The main purpose is to granulate .

[0061] The sintered material contains crystallization water and physical water, the former mainly comes from the ore itself, and the latter comes from the externally added water of the material. Adding water to the powdery sintering material is mainly to help the mixture into balls and granules, and to improve the air permeability of the material layer; secondly, during the sintering proce...

Embodiment 2

[0093] The present invention is a method for estimating the moisture content of the sintering machine mixture according to the amount of water added, using the amount of water added calculated in Example 1, and further estimating the final moisture of the sintering machine by setting the amount of water added for the first mixing and second mixing; It is estimated that the moisture content of the mixture on the sintering machine is H 3 , H 3 Calculated by the following formula:

[0094]

[0095] A 2 : Water content of the mixture after secondary mixing, A 2 =(1-γ 2 )*(A 1 +W 2 -W S2 -W B2 );

[0096] gamma 3 : Water evaporation rate of sintering machine mixture, γ 3 The value of is 1~5%, and the present embodiment is 1%;

[0097] W S3 : Water absorption of mixed quicklime in sintering machine, W S3 =m S ·α S3 ·β S 32.14%; where α S3 is the water absorption rate of quicklime, α S3 The value is 5-15%, and this implementation takes 10%; β S is the CaO conten...

Embodiment 3

[0101] The basic content of this embodiment is the same as that of Embodiment 1, except that the raw material ratio and moisture content of this embodiment are as shown in Table 2.

[0102] Table 2 The cutting amount of each raw material and the moisture content of the raw material

[0103]

[0104] (1-1) Water absorption α of quicklime when first mixed S1 Calculated by the following formula:

[0105]

[0106] K S1 : Coefficient of water absorption of quicklime in a mixture, K S1 The value is 0.16~0.20; this embodiment takes 0.18

[0107] t 1 : Mixing time for one mixing, t 1 The range is 3~6min, and the present embodiment takes 5min

[0108] The percentage of quicklime particle size ≤ 3mm, The value is 92~95%, and the present embodiment is 92%;

[0109] h 1 : mix target moisture, the present embodiment gets 7.39%;

[0110] T 1 : temperature of a mixture, T 1 The range is between 40°C and 55°C, and 44°C is used in this embodiment;

[0111] m in this examp...

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Abstract

The invention discloses a method for estimating the moisture content of a sintering machine mixture according to the amount of water added, and belongs to the technical field of sintering. The invention relates to a method for estimating the moisture content of the sintering machine mixture according to the amount of water added. It is estimated that the moisture content of the mixture on the sintering machine is H 3 , H 3 Calculated by the following formula: the present invention can estimate the moisture content of the mixture on the later sintering machine according to the amount of water added in the previous mixing process, which is convenient for the operator to adjust the sintering mixing process according to the technological conditions of the moisture content of the sintering mixture The amount of water added in the process is convenient to optimize the amount of water added in the process of sintering and mixing.

Description

technical field [0001] The invention relates to the technical field of iron ore sintering, in particular to a method for estimating the moisture content of a sintering machine mixture according to the amount of water added. Background technique [0002] Before the sintered material is mixed and granulated, its particle size is relatively fine. For example, the concentrate powder in the iron-containing raw material contains more than 60% of the 0-3mm particle size, and the flux and fuel have been crushed during the raw material preparation process, of which 0-3mm The content of the 3mm part is more than 80%, especially the <0.5mm powder accounts for about 40% of the total weight. Such fine-grained raw materials will seriously affect the air permeability of the sintered material layer during sintering, even when the draft sintering is carried out. It will be taken away by the air flow passing through the material layer, resulting in the loss of raw materials and seriously a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20C22B1/16
CPCC22B1/16G06F30/20
Inventor 陈虎常春荣邓小龙杨雄文
Owner 山东诺德能源科技有限公司
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