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A method for recycling cement kiln bricks after use

A cement kiln and recycling technology, applied in chemical instruments and methods, applications, household appliances, etc., can solve the problem of cement kiln bricks being unusable, and achieve the effect of low cost, fast speed and strong adaptability

Active Publication Date: 2022-07-15
TONGDA REFRACTORY TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a resource recycling method for used cement kiln bricks, which solves the problem that the used cement kiln bricks cannot be utilized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for recycling cement kiln bricks after use, the specific steps and parameters are as follows:

[0024] 1) Mandatory classification and selection of recycled cement kiln bricks of about 500 tons: divided into two categories according to alkaline bricks and non-alkaline bricks, each category is no longer subdivided, and the residual brick heads encountered during the classification process There is iron sheet on the surface of cement clinker and residual brick, and the clinker and iron sheet are forcibly removed;

[0025] 2) The classified used cement kiln bricks are laid and straightened three times and mixed by gravity respectively according to the type, so that the used cement kiln bricks of different masonry parts and different sizes are evenly mixed, and there is no need to break the used cement kiln bricks. ;

[0026] 3) Continuously put the used cement kiln alkaline bricks into the iron sheet shaft kiln for firing alkaline materials. After use, the brick...

Embodiment 2

[0030] A method for recycling cement kiln bricks after use, the specific steps and parameters are as follows:

[0031] 1) Select the 100 tons of recycled cement kiln used silica molybdenum bricks, and pick out the mixed alkaline bricks and garbage. For those with cement clinker on the head and iron sheets on the surface of the residual bricks, the clinker and iron sheets are forcibly removed. ;

[0032] 2) crushing the used cement kiln silica molybdenum bricks processed in step 1) with a large jaw crusher, and then carrying out three times of flat laying and direct extraction and gravity mixing, so that the materials of different masonry parts and different block diameters are evenly mixed;

[0033] 3) Continuously input the materials processed in step 2) in the rotary kiln for calcining high-alumina bauxite clinker. The duration of the ℃ firing interval is about 8 hours, and then it directly enters the cooling zone and is recovered at the end of the rotary kiln.

[0034] 4)...

Embodiment 3

[0037] A method for recycling alkaline bricks in a cement kiln after use, the specific steps and parameters are as follows:

[0038] 1) Pick out about 150 tons of cement kiln alkaline bricks that have been repaired and dismantled by the cement plant, pick out those with cement clinker on the head and iron sheets on the surface of the residual bricks, and force the clinker and iron sheets to be removed;

[0039] 2) The used alkaline cement kiln bricks processed in step 1) are crushed by a large jaw crusher, and then three times of flat laying and gravitational mixing are carried out, so that different masonry parts, different block diameters and different types of after-use Cement kiln bricks are evenly mixed;

[0040] 3) Continue to put the used cement kiln alkaline bricks treated in step 2) into the cement kiln that has just been repaired and run at elevated temperature. It travels for about 8 hours in the firing interval of 1350-1450 °C, and then directly enters the transit...

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Abstract

The utility model relates to a recycling method for recycling cement kiln bricks after use, which belongs to the technical field of high-temperature refractory materials for building materials. The specific steps are: firstly classify and sort the used cement kiln bricks according to their materials; then homogenize each type of used cement kiln bricks after sorting; put the pre-homogenized materials into the high temperature kiln continuously, The material runs for ≥6 hours in the high temperature area; the material leaving the kiln is naturally cooled, crushed, classified according to particle size, and stored in categories. The advantages are: it can efficiently remove harmful alkali, chlorine, sulfur and other impurity components in the cement kiln bricks after use, and the cement kiln bricks after use are harmless and recycled; it has strong adaptability and is easy to operate.

Description

technical field [0001] The invention belongs to the technical field of high-temperature refractory materials for building materials, and particularly relates to a recycling method for recycling cement kiln bricks after use. Background technique [0002] Refractory is an indispensable auxiliary material for high temperature industry, and is widely used in high temperature equipment for industrial operation such as cement, steel, electric power, petrochemical industry, and waste incineration. With the increase of high-temperature industrial output in my country, the amount of refractory materials is also increasing year by year. According to statistics, the amount of refractory materials in my country exceeded 20 million tons in 2018. The increasing amount of refractory materials has also accelerated the consumption of natural resources. A large amount of refractory high temperature waste. my country is a major cement producer in the world. According to incomplete statistics, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B33/132B09B3/40B09B3/35B09B5/00
CPCC04B35/66C04B33/1324B09B5/00B09B3/40Y02P40/60
Inventor 安建成高长贺罗华明王亚利田新峰连伟康
Owner TONGDA REFRACTORY TECH CO LTD
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