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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 problem that the leftover scraps and stone powder that cannot be calcined in the prior art occupy land and pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh the material in the following proportions:

[0029] Limestone slag 0.2 tons

[0030] Stone powder 0.7 tons

[0031] Powdered calcium oxide 0.05 tons

[0032] Water 0.05 tons

[0033] Add powdered calcium oxide and water to the above raw materials separately, stir and mix evenly, and press into cube-shaped bricks with hydraulic molding equipment.

[0034] The obtained limestone bricks are stacked to a height of 10 floors, and sent 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, they are transferred to a tunnel kiln for calcination as follows. The front section of the tunnel kiln is 5m, the temperature is controlled at 300°C-800°C, and the passage time of stone bricks is about 5h; It is controlled at 800°C to 100°C, and the passing time of stone bricks is about 6 hours. The activated lime bricks transported out of the tunnel kiln are cooled to room temperature...

Embodiment 2

[0036] Weigh the material in the following proportions:

[0037] Limestone slag 0.5 tons

[0038] Stone powder 0.45 tons

[0039] Water 0.05 tons

[0040] The above raw materials are stirred and mixed evenly, and pressed into cylindrical bricks by hydraulic forming equipment.

[0041] The obtained limestone bricks are stacked to a height of 15 floors, and sent 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, they are transferred to a tunnel kiln for calcination as follows. The front section of the tunnel kiln is 5m, the temperature is controlled at 300°C-800°C, and the passage time of stone bricks is about 5h; It is controlled at 800°C to 100°C, and the passing time of stone bricks is about 6 hours. The activated lime bricks transported out of the tunnel kiln are cooled to room temperature in the finished product warehouse, and can be loaded on the truck when used by the u...

Embodiment 3

[0043] Weigh the material in the following proportions:

[0044] Limestone slag 0.5 tons

[0045] Stone powder 0.45 tons

[0046] Water 0.05 tons

[0047] Stir and mix the above raw materials evenly, and press them into cake-shaped bricks with hydraulic forming equipment.

[0048] The obtained limestone bricks are stacked to a height of 15 floors, and sent 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, they are transferred to a tunnel kiln for calcination as follows. The front section of the tunnel kiln is 5m, the temperature is controlled at 300°C-800°C, and the passage time of stone bricks is about 5h; It is controlled at 800°C to 100°C, and the passing time of stone bricks is about 6 hours. The activated lime bricks transported out of the tunnel kiln are cooled to room temperature in the finished product warehouse, and can be loaded on the truck when used by the user....

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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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