Segregation distribution method for sintered material

A technology of segregating cloth and sintering materials, which is applied in the field of sintering, can solve the problems of sintering machines that are difficult to achieve lateral segregation, and achieve the effect of improving the quality of sintered products and improving air permeability

Active Publication Date: 2017-12-22

SHOUGANG JINGTANG IRON & STEEL CO LTD

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AI-Extracted Technical Summary

Problems solved by technology

[0003] The embodiment of the present invention solves the technical problem that the sintering machine is difficult to achieve good lateral segregation in the prior art by providing a sintered material segregation distribution method, and realizes the lateral segregation of the sintered material, so that th...

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Abstract

The invention relates to the technical field of sintering, particularly to a segregation distribution method for a sintered material. The segregation distribution method comprises the steps that a mixture ore bin is weighed at a first weighing point of the lower end of the mixture ore bin, and first real-time weighing data a is acquired; the mixture ore bin is weighed at a second weighing point of the lower end of the mixture ore bin, and second real-time weighing data b is acquired; residence time Ta of a reciprocal feeder at a first limit material falling point and residence time Tb of the reciprocal feeder at a second limit material falling point are set; an average of the sum of the first real-time weighing data a and the second real-time weighing data b is calculated, when the average is 20% to 30% of the maximum loading weight of the mixture ore bin, segregation control is carried out; the value of a minus b is calculated; if a minus b is smaller than or equal to epsilon, segregation control is carried out according to the current Ta and Tb values; and if a minus b is larger than epsilon, the current Ta or Tb is regulated till a minus b is smaller than or equal to epsilon, and segregation control is carried out according to the corresponding Ta or Tb value. According to the segregation distribution method for the sintered material provided by the invention, quality of a sintered product is improved.

Application Domain

Charge treatment typeFurnace types

Technology Topic

Distribution methodResidence time +3

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Examples

Experimental program(1)

Example Embodiment

[0025] The embodiment of the present invention solves the technical problem that the sintering machine in the prior art is difficult to achieve good lateral segregation by providing a method for distributing sintered material segregation, realizes the lateral segregation of the sintered material, and makes the sintered material with large particle size distributed in the mixture In the middle of the sintered stockpiles in the silo, the air permeability in the middle of the sintered stockpiles is improved, so that the sintered materials are sintered evenly, and the quality of the sintered products is improved.

[0026] see figure 1 , the embodiment of the present invention provides a sintered material segregation distribution method, including:

[0027] The first weighing point at the lower end of the mixed material silo weighs the mixed material silo to obtain the first real-time weighing data a, and the first weighing point corresponds to the first limit blanking point of the shuttle distributor.

[0028] The second weighing point at the lower end of the mixed material silo weighs the mixed material silo to obtain the second real-time weighing data b, and the second weighing point corresponds to the second limit blanking point of the shuttle distributor.

[0029] Set the dwell time Ta of the shuttle distributor at the first limit blanking point and the dwell time Tb of the shuttle distributor at the second limit blanking point; calculate the difference between the first real-time weighing data a and the second real-time weighing data b. And the average value, when the average value reaches 20%-30% of the maximum loading weight of the mixed material silo, it enters the segregation control.

[0030] Calculate the value of |a-b|; if |a-b|≤ε, use the current Ta and Tb values for segregation control; if |a-b|>ε, adjust the current Ta or Tb until |a-b|≤ε, use the corresponding Ta or Tb Tb value is used for segregation control; ε is the deviation setting value, which is a positive value.

[0031] Preferably, the deviation setting value ε takes values from (a+b)/1000 to (a+b)/10.

[0032] Preferably, adjust Ta or Tb until |a-b|≤ε to enter segregation control, including:

[0033] Obtain the distance between the discharge port of the shuttle distributor and the first limit blanking point and the second limit blanking point.

[0034] If the discharge port of the shuttle distributor is relatively far from the first limit blanking point, the Ta value is fixed. When a-b>ε, the Tb value is increased; when b-a>ε, the Tb value is decreased.

[0035] If the discharge port of the shuttle distributor is relatively far from the second limit blanking point, the Tb value is fixed, and when a-b>ε, the Ta value is reduced; when b-a>ε, the Ta value is increased.

[0036] Preferably, the time adjustment step of Ta or Tb is 1-10 seconds.

[0037] Preferably, after entering the segregation control and before calculating |a-b|, the shuttle distributor is controlled to run for at least one cycle T.

[0038] Preferably, there are two first weighing points; the two first weighing points are symmetrically arranged below the first limit blanking point; the mixed material silo is weighed simultaneously at the two first weighing points and the respective weights are added together The first real-time weighing data a is obtained from the weight data.

[0039] Preferably, there are two second weighing points; the two second weighing points are symmetrically arranged below the second limit blanking point; the mixed material silo is weighed simultaneously at the two second weighing points and the respective weights are added together The second real-time weighing data b is obtained from the weighing data.

[0040] The sintered material segregation distribution method provided by the present invention is described below with reference to specific embodiments: the sintered material segregation distribution method provided in this embodiment is implemented by a primary or secondary control system composed of PLC, instrument and other equipment. see figure 1 , the sintered material segregation distribution method provided in this embodiment includes:

[0041] Step 10: Weigh the mixed material silo at the first weighing point at the lower end of the mixed material silo to obtain the first real-time weighing data a, and the first weighing point corresponds to the first limit blanking point of the shuttle distributor.

[0042] There are two first weighing points, and the two first weighing points are symmetrically arranged below the first limit blanking point; the mixed material silo is weighed at the same time at the two first weighing points and the respective weighing data are added to obtain The first real-time weighing data a. Set indenters at the two first weighing points respectively, and measure the weighing data.

[0043] Step 20: Weigh the mixed material silo at the second weighing point at the lower end of the mixed material silo to obtain second real-time weighing data b, and the second weighing point corresponds to the second limit blanking point of the shuttle distributor.

[0044] There are two second weighing points, and the two second weighing points are symmetrically arranged below the second limit blanking point; the mixed material silo is weighed simultaneously at the two second weighing points and the respective weighing data are added to obtain The second real-time weighing data b. Set up indenters at the two second weighing points respectively, and measure the weighing data.

[0045] Step 30: Set the dwell time Ta of the shuttle distributor at the first limit blanking point to 7s, and the dwell time Tb of the shuttle distributor at the second limit blanking point to be 7s; calculate the first real-time weighing data a and The average value of the sum of the second real-time weighing data b, when the average value reaches 20%-30% of the maximum loading weight of the mixed material silo, it enters the segregation control.

[0046] Step 40: Control the shuttle-type distributor to run for at least one cycle T, and set the operation cycle T of the shuttle-type distributor to be 0.5h.

[0047]Step 50: Calculate the value of |a-b|; if |a-b|≤ε, use the current Ta and Tb values for segregation control; if |a-b|>ε, adjust the current Ta or Tb until |a-b|≤ε, use the corresponding Segregation control is performed with the Ta or Tb value of ε; ε is the deviation setting value, which is a positive value, and the value of the deviation setting value ε is (a+b)/100. Among them, adjusting the current Ta or Tb includes: if the discharge port of the shuttle distributor is relatively far from the first limit blanking point, the Ta value is fixed, when a-b>ε, increase the Tb value; when b-a>ε, decrease Tb value. If the discharge port of the shuttle distributor is relatively far from the second limit blanking point, the Tb value is fixed, and when a-b>ε, the Ta value is reduced; when b-a>ε, the Ta value is increased. Among them, the time adjustment step of Ta or Tb is 2s.

[0048] At present, most sintering machines are controlled by a double flue system. The air volume of the sintered material directly facing the flue is large, while the air volume of the part connecting the two flues is small. Therefore, in the normal sintering production process, the particle size of the middle part should be improved, or It is improved by adding a loosener, but it cannot be adjusted in real time, and it cannot be dealt with when the process conditions such as the feeding amount change. It must be stopped for adjustment before it can be improved. By adjusting the lateral segregation, the lateral direction of the sintered material in the ore tank can be adjusted. Distribution, online real-time adjustment of breathability. The average particle size (unit is mm) of the sintered material in the transverse particle size distribution of the trolley before and after the transverse segregation is changed as follows: 16 columns are taken in the transverse section, and the particle size changes of each column are compared and the overall particle size change is compared. , the detailed data are shown in Table 1:

[0049]

[0050] Table 1

[0051] It can be seen from Table 1 that the average particle size distribution of the sintered material on the cross section of the pile before lateral segregation is not uniform. increase before.

[0052] In the segregation distribution method of the sintered material provided by the embodiment of the present invention, during segregation, by controlling the residence time Ta of the shuttle distributor at the first limit blanking point and the residence time Tb of the shuttle distributor at the second limit blanking point, the The difference between the first weighing data a and the second weighing data b is controlled within the set value ε, so that the sintered material forms a sintered material shape with high sides and low middle in the mixed material silo, so that the particle size during the segregation process is formed. The large sintered material is distributed in the middle of the sintered material pile in the mixed material silo, and the air permeability in the middle of the sintered material pile is improved, so that the sintered material is uniformly sintered, and the quality of the sintered product is improved.

[0053] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent substitutions without departing from the spirit and scope of the technical solutions of the present invention should be included in the scope of the claims of the present invention.

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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Classification and recommendation of technical efficacy words

Improve breathability

Segregation distribution method for sintered material

A technology of segregating cloth and sintering materials, which is applied in the field of sintering, can solve the problems of sintering machines that are difficult to achieve lateral segregation, and achieve the effect of improving the quality of sintered products and improving air permeability

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

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Description & Claims & Application Information

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