Automatic control method for water content of sintering mixture

A technology for sintering mixtures and sintering mixtures, which is used in special data processing applications, instruments, electrical digital data processing, etc.

Active Publication Date: 2018-06-08
山东诺德能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is difficult to accurately adjust t

Method used

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  • Automatic control method for water content of sintering mixture
  • Automatic control method for water content of sintering mixture
  • Automatic control method for water content of sintering mixture

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0080] Example 1

[0081] The raw materials used in sintering include iron-containing raw materials, fluxes and fuels. These raw materials all contain a certain amount of original moisture, but their moisture value does not meet the sintering requirements. During the sintering and mixing process, the original moisture content should be adjusted separately. Replenish moisture when mixing and secondary mixing. The main purpose of the primary mixing is to add water to wetting and mixing, so that the moisture, particle size and components of the mixture are evenly distributed. In addition to the continuous mixing, the secondary mixing also requires supplementary wetting. The main purpose is to granulate. .

[0082] The sintering material contains crystal water and physical water, the former mainly comes from the ore itself, and the latter comes from the external added water of the material. Adding water to the powdery sintering material is mainly to help the mixture to form pellets a...

Example Embodiment

[0113] Example 2

[0114] Using the water added amount calculated in Example 1, the final water content of the sintering machine is further estimated by setting the water addition amount of the first mixing and the second mixing, and the final water content is H 3

[0115]

[0116] A 2 :The water content of the mixture after one mixing, A 2 =(1-γ 2 )*(A 1 +W 2 -W S2 -W B2 );

[0117] γ 3 :The water evaporation rate of the second mixture, γ 3 The value of is 1 to 5%, and this embodiment takes 1%;

[0118] W S3 : Water absorption of a mixed quicklime, W S3 =m S ·Α S3 ·Β S ·32.14%; of which 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 content of quicklime, the CaO content of the quicklime used this time is 78.88%, W S2 =0.91t / h;

[0119] W B3 : Water absorption of a mixed dolomite, W B3 =m B ·Α B3 ·Β B ·32.14%; of which α B3 Is the water absorption of dolomite, α B3 The value is 5-8%, and 5% is used in this embod...

Example Embodiment

[0121] Example 3

[0122] 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 shown in Table 2. (1-1) Water absorption rate of quicklime during first mixing α S1 Calculated by the following formula:

[0123]

[0124] K S1 :The coefficient of water absorption of quicklime in the first mix, K S1 The value is 0.16~0.20; this embodiment takes 0.18

[0125] t 1 : The mixing time of one mixing, t 1 The range is 3~6min, this example takes 5min

[0126] Percentage of quicklime particle size ≤ 3mm, The value is 92-95%, and this embodiment takes 92%;

[0127] H 1 : Once the target moisture is mixed, 7.39% is used in this embodiment;

[0128] T 1 :The temperature of a mixed mixture, T 1 The range is between 40°C and 55°C, and 44°C is used in this embodiment;

[0129] M in this embodiment s =40t / h, M 0 =798.50t / h;

[0130] Calculate α S1 = 54.99%;

[0131] Table 2 The amount of each raw material and ...

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Abstract

The invention discloses an automatic control method for the water content of a sintering mixture and belongs to the technical field of sintering. The automatic control method includes the specific steps that S100, the water content of a mixture in the first mixing process is controlled, and a target water content H1 is firstly set; it is detected that the water content of the mixture after first mixing is H'1; and when |H'1-H1|>=0.1%, the water adding amount in the mixture sintering correcting process is W'1; and S200, the water content of the mixture in the second mixing process is controlled, and a target water content H2 is firstly set; it is detected that the water content of the mixture after second mixing is H'2; and when |H'2-H2|>=0.1%, the water adding amount in the mixture sintering correcting process is W'2. By adjusting the water adding amount W1 during first mixing and the water adding amount W2 during second mixing in the mixture sintering process, the total water adding amount W0 in the mixture sintering process is controlled. According to the automatic control method for the water content of the sintering mixture, the accuracy and objectivity of operation are improved, and the water distribution precision of the sintering mixture is improved.

Description

technical field [0001] The invention relates to the technical field of iron ore sintering, and more specifically relates to a method for automatically controlling the moisture content of a sintering mixture. 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 affecting the nor...

Claims

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Application Information

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IPC IPC(8): C22B1/16G06F19/00
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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