Method for calcining active lime

A technology of active lime and calcination, which is applied in the direction of lime production, etc., can solve the problems of leftover scraps and stone powder occupation, land pollution and environmental pollution, achieve high-efficiency calcination, improve resource utilization rate and lime enterprise production efficiency, and realize waste utilization. Effect

Inactive Publication Date: 2017-02-08
BO GUANG THERMAL ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a method for calcination of active lime to solve the technical prob

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] Weigh the materials according to the following ratio:

[0029] Limestone slag 0.2 tons

[0030] Stone powder 0.7 tons

[0031] Powdered calcium oxide 0.05 tons

[0032] 0.05 tons of water

[0033] The powdery calcium oxide and water in the above raw materials are added separately, and after being stirred and mixed uniformly, they are pressed into cube-shaped bricks with hydraulic forming equipment.

[0034] Stack the obtained limestone bricks to a height of 10 stories, and send them to a drying furnace by a flat trolley for drying. The temperature of the drying furnace is controlled between 100 and 300°C. After drying for 3 hours, it is transferred to a tunnel kiln for calcination as follows. The front section of the tunnel kiln is 5m, the temperature is controlled at 300℃~800℃, and the stone brick passing time is about 5h; the middle section of the tunnel kiln is 8m, the temperature is controlled at 800℃~1000℃, and the stone brick passing time is about 7.5h; th...

Example Embodiment

[0035] Example 2

[0036] Weigh the materials according to the following ratio:

[0037] Limestone slag 0.5 tons

[0038] Stone powder 0.45 tons

[0039] 0.05 tons of water

[0040] The above-mentioned raw materials are stirred and mixed uniformly, and pressed into cylindrical bricks with hydraulic forming equipment.

[0041] Stack the obtained limestone bricks to a height of 15 floors, and send them to a drying furnace by a flat trolley for drying. The temperature of the drying furnace is controlled between 100 and 300°C. After drying for 3 hours, it is transferred to a tunnel kiln for calcination as follows. The front section of the tunnel kiln is 5m, the temperature is controlled at 300℃~800℃, and the stone brick passing time is about 5h; the middle section of the tunnel kiln is 8m, the temperature is controlled at 800℃~1000℃, and the stone brick passing time is about 7.5h; the back section of the tunnel kiln is 5m, the temperature is It is controlled at 800℃~100℃, and the stone bri...

Example Embodiment

[0042] Example 3

[0043] Weigh the materials according to the following ratio:

[0044] Limestone slag 0.5 tons

[0045] Stone powder 0.45 tons

[0046] 0.05 tons of water

[0047] The above-mentioned raw materials are stirred and mixed uniformly, and pressed into a cake-shaped brick with hydraulic forming equipment.

[0048] Stack the obtained limestone bricks to a height of 15 floors, and send them to a drying furnace by a flat trolley for drying. The temperature of the drying furnace is controlled between 100 and 300°C. After drying for 3 hours, it is transferred to a tunnel kiln for calcination as follows. The front section of the tunnel kiln is 5m, the temperature is controlled at 300℃~800℃, and the stone brick passing time is about 5h; the middle section of the tunnel kiln is 8m, the temperature is controlled at 800℃~1000℃, and the stone brick passing time is about 7.5h; the back section of the tunnel kiln is 5m, the temperature is It is controlled at 800℃~100℃, and the stone br...

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PUM

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Abstract

The invention discloses a method for calcining active lime; the method is characterized by comprising the following steps: a, preparing limestone brick bodies having regular shapes; and b, carrying out active lime calcining production of the limestone brick bodies having regular shapes and prepared in the step a by using a tunnel kiln. According to the method, the furnace entering state of limestone can be controlled optionally according to the calcining conditions, so the activity degree of lime calcined by the method is higher than that of a traditional production method, and the raw over-sintering rate is lower.

Description

technical field [0001] The invention relates to the technical field of lime calcination, in particular to a molding method of limestone slag and stone powder. Background technique [0002] In the process of traditional limestone mining and ore primary processing, a large amount of scraps and stone powders that cannot be calcined will be produced. The storage of these scraps and stone powders takes up a lot of land and pollutes the environment. Contents of the invention [0003] The purpose of the present invention is to propose a method for calcination of active lime to solve the technical problem in the prior art that the leftover debris and stone powder which cannot be calcined occupy land and pollute the environment. [0004] The present invention is achieved like this: [0005] Active lime calcining method, comprises the following steps: [0006] a. prepare regular-shaped limestone bricks; [0007] b. Calcining the regular-shaped limestone bricks produced in step a ...

Claims

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Application Information

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IPC IPC(8): C04B2/10
CPCC04B2/10Y02P40/40
Inventor 宋军保宋海玉李振兴郭黎明
Owner BO GUANG THERMAL ENERGY
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