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Technology for roasting magnesite and its special apparatus

A roasting process and magnesite technology, applied in lime production and other directions, can solve the problems of high cost, many accidents, large investment, etc., and achieve the effect of improving quality and improving utilization rate

Inactive Publication Date: 2004-03-31
吴太洲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention in order to solve the external heating rotary kiln calcined magnesite recovery CO 2 Provide a new roasting process for the existing problems of large investment, many accidents, and high cost

Method used

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  • Technology for roasting magnesite and its special apparatus
  • Technology for roasting magnesite and its special apparatus
  • Technology for roasting magnesite and its special apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A recyclable CO 2 The magnesite external heating vertical roasting furnace is divided into three sections: preheating zone (1), decomposition zone (2) and cooling zone (3) from top to bottom according to the roasting process. An angle steel (11) is arranged in the preheating zone (1), and the angle steel is selected to be heat-resistant above 60° C., and the angles are placed horizontally in multiple rows upwards; the top layer is provided with a dust collector (12), so that the flue gas is discharged into the atmosphere after dust removal. In the decomposition zone (2), the fire chamber (21) and the material chamber (22) are alternate, and the material chamber (22) and the fire chamber (21) are made into a rectangular format; the material chamber (22) is equipped with a material guide plate (23), so that the lower space of the material guide plate (23) accommodates the decomposed CO 2 , and then extracted through the discharge hole (24) at one end, the material guide ...

Embodiment 2

[0032] A recyclable CO 2 The magnesite external heating vertical roasting furnace is divided into three sections: preheating zone (1), decomposition zone (2) and cooling zone (3) from top to bottom according to the roasting process. Round steel rods (11) are arranged in the preheating zone (1), and multiple rows are placed horizontally; the top layer is provided with a dust collector (12), so that the flue gas is discharged into the atmosphere after dust removal.

[0033] In the decomposition zone (2), the material chamber (22) is inserted into the fire chamber (fire box) (21) in the form of a rectangular column, and the material chamber (22) is provided with a material guide plate (23) so that the The lower space of the plate (23) accommodates the decomposed CO 2 , and then extracted through the discharge hole (24) at one end, the material guide plate (23) is also to stir the material layer simultaneously, so that it is heated evenly.

[0034] At the bottom of the cooling z...

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Abstract

A process of roasting magnesite is characterized in taking mineral particles with the size smaller than 10mm as the raw material, experiencing three steps of preheating, roasting and cooling by automatic subsidence of the mineral particles in the upright roaster oven, the preheating temperature is 450í½500degree C, the roasting temperature is 700í‚50degree C, then CO2 is produced. The special device of the process is an upright roaster oven for heating magnesite which could recycle CO2. In the preheating zone of the kiln there have angle irons with forward angles, which are horizontally arranged in rows, a dust catcher is on the top layer. In the decomposition zone, firerooms and material rooms are arranged alternately, there have stock guides in material rooms, a discharging flashboard or a discharging machine or an air channel is at the bottom of the cooling zone. There have flashboards at the bottom and the discharge gate in the same level.

Description

technical field [0001] The invention provides a roasting process and a special device thereof, which are suitable for roasting magnesite. Background technique [0002] The proven reserves of magnesite resources in my country are 3 billion tons, accounting for 23.88% of the world's total reserves. The main component of magnesite is MgCO 3 , when calcined, decomposes into MgO and CO 2 , of which MgO accounted for 47.8%, CO 2 Accounted for 52.2%. In the past, magnesite was calcined to obtain MgO, and the decomposed CO 2 It is discharged into the atmosphere with the flue gas. [0003] The MgO products after calcination of magnesite are divided into two categories. Products calcined above 1650°C are broken into various particle sizes according to the needs of use, called dead-burned magnesia, because it can withstand high temperatures above 2000°C, it is an important furnace building material for metallurgical kilns. The product calcined at 700-1100°C is crushed into fine ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B2/10C04B2/12
CPCY02P40/40
Inventor 吴太洲
Owner 吴太洲
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