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Cement clinker preparation method and device

A technology for cement clinker and preparation device, applied in lighting and heating equipment, electric furnace heating, furnace and other directions, can solve the problems of unsatisfactory environmental protection effect and low efficiency, and achieve good ecological environmental benefits, good quality and low power consumption. Effect

Active Publication Date: 2019-02-15
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing methods have the characteristics of rapid (low or high temperature) calcination, the efficiency is not high and the environmental protection effect is not ideal

Method used

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  • Cement clinker preparation method and device
  • Cement clinker preparation method and device
  • Cement clinker preparation method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The raw material powder is calcined at 1100°C for 0.5 hours to obtain the embryo, and electrodes are added to the embryo, and then at 1160°C, the electric field strength is 100V / mm, and the current is controlled at 10 mA / mm 2 After 30 seconds of electrification, the cement clinker was rapidly cooled to room temperature. The results of the XRD semi-quantitative test of the clinker mineral crystal content are shown in Table 2:

[0023] Table 2

[0024] C3S%

Embodiment 2

[0026] The raw material powder is calcined at 1200°C for 1 hour to obtain the blank, and electrodes are added on the blank, and then at 1168°C, the electric field strength is 200V / mm, and the current is controlled at 20mA / mm 2 , energized for 300 seconds, cooled to room temperature to obtain cement clinker, XRD semi-quantitative test clinker mineral crystal content results are shown in Table 3:

[0027] table 3

[0028] C3S%

Embodiment 3

[0030] The raw material powder is calcined at 1000°C for 40 minutes to obtain the blank, and electrodes are added to the blank, and then at 1000°C, the electric field strength is 20V / mm, and the current is controlled at 5 mA / mm 2 , energized for 600 seconds and cooled to room temperature to obtain cement clinker, XRD semi-quantitative test clinker mineral crystal content results are shown in Table 4:

[0031] Table 4

[0032] C3S%

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Abstract

The invention discloses a cement clinker preparation method and device. The method comprises the step of applying a voltage to a blank to sinter the blank to obtain cement clinker at 900-1200 DEG C, wherein the blank is obtained by pre-sintering crude cement powder at 900-1200 DEG C. The device comprises a rotary kiln, wherein a feeding hole and a discharge hole are formed in the rotary kiln; a first electrode coil and a second electrode coil are sequentially arranged inside the rotary kiln in a direction from the feeding hole to the discharge hole; notches are formed in the first electrode coil; notches are formed in the second electrode coil; the area between the first electrode coil and the second electrode coil is an electric heating area. The method is simple in process, the sinteringspeed is a hundred times or above of a conventional sintering speed, the furnace temperature can be reduced by 200 DEG C or greater, and the cement clinker is good in quality.

Description

technical field [0001] The invention belongs to the technical field of cement preparation, and in particular relates to a method for preparing cement clinker. Background technique [0002] The existing cement clinker preparation methods mainly include the cyclone firing method and the boiling firing method. In addition, the United States has conducted research on the production of clinker in a plasma flame kiln. In addition, the electromagnetic radiation in the infrared range is also used to let the material pass through the calcination of the high-temperature electric heating layer; the energy conversion efficiency of the laser heating method can reach 50%, which makes it an extremely effective heat source for rapid heaters. Although the existing various methods have the characteristics of fast (low temperature or high temperature) calcination, the efficiency is not high, and the environmental protection effect is not ideal. Contents of the invention [0003] Aiming at t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/46F27B7/34F27D11/10
CPCC04B7/46F27B7/34F27D11/10
Inventor 赵鹏景明海张煜坤苏兴华
Owner CHANGAN UNIV
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