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A method for preventing the bursting of the refractory material of the hopper of the annular cooler

A technology of receiving hopper and ring cooler, which is applied in the treatment of discharged materials, furnaces, lighting and heating equipment, etc., can solve the problems of refractory material bursting, bursting, thickness reduction, etc., to save refractory materials and labor costs, and achieve economic benefits. significant effect

Active Publication Date: 2021-12-03
扬州泰富特种材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the refractory material of the receiving hopper of the annular cooler must be dried and removed at a relatively low temperature after each maintenance and replacement of the molecular water and crystal water. However, since the annular cooler has no drying heat source, only the rotary kiln The red-hot pellets inside directly enter the receiving hopper of the annular cooler, causing the refractory materials in this part to burst obviously after each replacement, reducing the thickness of a local or large area, and even directly exposing the steel armor, thus making the annular cooler The refractory materials in the receiving hopper were forced to stop production for maintenance after less than 4 months of use, which seriously restricted the stability of operation and production
The refractory material with the above structure is also prone to bursting problems
After searching, no relevant literature was retrieved to solve the problem of refractory bursting in the receiving hopper of the annular cooler

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method to prevent the bursting of the refractory material of the hopper of the annular cooler:

[0025] (1) The refractory material poured on the four-sided steel armor of the hopper of the ring cooler. The raw materials of the refractory material include aggregate and water. The moisture content of the refractory material is 8-12wt% of the refractory material aggregate. The chemical composition of the refractory material aggregate The composition is mainly composed of Al 2 o 3 , SiO 2 Composition, Al 2 o 3 :65-72 wt%, SiO 2 : 24-30 wt%, the balance is other metal oxides.

[0026] (2) By adjusting the feeding amount of the receiving hopper of the annular cooler, the atmosphere temperature in the receiving hopper of the annular cooler is kept at 250-320°C for 6 hours; the feeding amount of the receiving hopper is 60-70 tons / hour;

[0027] (3) Increase the feeding amount of the receiving hopper of the annular cooler so that the atmosphere temperature in the recei...

Embodiment 2

[0032] A method to prevent the bursting of the refractory material of the hopper of the annular cooler:

[0033] (1) The refractory material poured on the four-sided steel armor of the hopper of the ring cooler. The raw materials of the refractory material include aggregate and water. The moisture content of the refractory material is 8-12wt% of the refractory material aggregate. The chemical composition of the refractory material aggregate The composition is mainly composed of Al 2 o 3 , SiO 2 Composition, Al 2 o 3 :65-72 wt%, SiO 2 : 24-30 wt%, the balance is other metal oxides.

[0034] (2) By adjusting the feeding amount of the receiving hopper of the annular cooler, the atmosphere temperature in the receiving hopper of the annular cooler is kept at 250-320°C for 7 hours; the feeding amount of the receiving hopper is 60-70 tons / hour;

[0035] (3) Increase the feeding amount of the receiving hopper of the annular cooler, so that the atmosphere temperature in the rece...

Embodiment 3

[0040] A method to prevent the bursting of the refractory material of the hopper of the annular cooler:

[0041] (1) The refractory material poured on the four-sided steel armor of the hopper of the ring cooler. The raw materials of the refractory material include aggregate and water. The moisture content of the refractory material is 8-12wt% of the refractory material aggregate. The chemical composition of the refractory material aggregate The composition is mainly composed of Al 2 o 3 , SiO 2 Composition, Al 2 o 3 :65-72 wt%, SiO 2 : 24-30 wt%, the balance is other metal oxides.

[0042] (2) By adjusting the feeding amount of the receiving hopper of the annular cooler, the atmosphere temperature in the receiving hopper of the annular cooler is kept at 250-320°C for 8 hours; the feeding amount of the receiving hopper is 60-70 tons / hour;

[0043] (3) Increase the feeding amount of the receiving hopper of the annular cooler so that the atmosphere temperature in the recei...

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Abstract

The invention belongs to the technical field of "grate-rotary kiln-circular cooler" oxidation pellet production technology, and specifically discloses a method for preventing the bursting of the refractory material of the hopper of the circular cooler: (1) the four sides of the hopper of the circular cooler The refractory material containing 8-12wt% moisture is poured on the steel armor, and the thickness of the refractory material is 240-250mm; (2) By adjusting the feeding amount of the hopper of the annular cooler, the temperature of the atmosphere in the hopper of the annular cooler is maintained at 250-320°C, holding time 6-8h; (3) Increase the feeding amount of the receiving hopper of the annular cooler, so that the atmosphere temperature in the receiving hopper of the annular cooler is kept at 470-530°C, and the holding time is 18-16h. The present invention adopts the hot ball baking method with a thin material layer and a fast ring speed of the ring cooler, that is, adopts a reasonable control method for controlling the temperature of the first cold section of the ring cooler, so that the newly replaced refractory material in the receiving hopper can be heated at a relatively low temperature. Molecular water and crystal water are dried and removed at low temperature.

Description

technical field [0001] The invention belongs to the technical field of "grate machine-rotary kiln-circular cooler" oxidation pellet production technology, and in particular relates to a method for preventing bursting of refractory material in a hopper of a circular cooler. Background technique [0002] The ring cooler is one of the important equipment in the "grate-rotary kiln-ring cooler" oxidation pellet production process, mainly used to cool the pellets up to nearly 1200 ℃. The specific method is: the pellets in the rotary kiln with a temperature as high as nearly 1200 °C directly enter the receiving hopper, accumulate in the receiving hopper to form a certain height, and carry out flat compaction through the flat material mound with a height of 800mm. The circular operation distributes the pellets in the receiving hopper evenly to each trolley. During the operation of the ring cooler, the lower part is used for blast cooling, and finally the pellets are cooled to the r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D15/02F27D1/16
CPCF27D1/1678F27D15/02
Inventor 刘福来朱辛州
Owner 扬州泰富特种材料有限公司