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Cooler of roasting system and cooling method

A cooler and roasting technology, which is applied in the field of the cooler behind the furnace, can solve the problems of large floor area, indistinguishable materials at the exhaust port and overflow port, insufficient processing capacity, etc., and achieve the effect of large processing capacity

Active Publication Date: 2015-04-01
CHENGDU LEEJUN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cooling capacity of this cooler is small, the cooling speed is slow, and the materials at the exhaust port and the overflow port cannot be distinguished
[0004] The high-temperature fine powder cooling devices used in other industries mainly use water-cooled jackets or air-cooled rotating drums or spiral water-cooled jackets, which also have the problem of insufficient cooling speed or insufficient processing capacity, and some still have the requirement that an oxygen-free atmosphere cannot be guaranteed. , or have a mechanical transmission mechanism, or have wear problems, or the cooling system has problems of leakage after thermal stress and blockage of supercooled powder, and it occupies a large area and consumes a lot of power

Method used

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  • Cooler of roasting system and cooling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment one: the hematite (Fe 2 o 3 ) after roasting and sent to this cooler for cooling, the temperature of the material at the inlet is 600°C, the temperature of the material at the outlet is 150°C, and the specific magnetic susceptibility χ of the material at the outlet S =1×10 -2 m 3 / kg, which meets the requirements of strong magnetic materials. The calculated output of this cooler is 30t / h, which can be matched with small and medium-sized roasting systems.

Embodiment 2

[0033] Embodiment two: the siderite (FeCO 3 ) after roasting and sent to this cooler for cooling, the temperature of the material at the inlet is 650°C, the temperature of the material at the outlet is 150°C, and the specific magnetic susceptibility χ of the material at the outlet S =1.5×10 -2 m 3 / kg, which meets the requirements of strong magnetic materials. The calculated output of this cooler is 30t / h, which can be matched with small and medium-sized roasting systems.

Embodiment 3

[0034] Example 3: The reduced iron powder with a particle size of 80 mesh is directly sent to the cooler for cooling after being released from the reduction furnace. The temperature of the material at the entrance is 700°C, and the temperature of the material at the exit is 40°C. Put it into the air-permeable cloth bag, and the surface temperature of the cloth bag rose to 60°C after 1 hour, indicating that the reduced iron was not oxidized during the cooling process of this cooler and maintained its activity.

[0035] A kind of cooling method is characterized in that, comprises the following steps:

[0036] (1) Softened clean water is introduced into the water replenishment port 25 to enter the fourth-stage heat exchanger 11, and water is passed to the second-stage heat exchanger 13 through the first steam storage tank 23, and the second steam storage tank 24 is supplied to the third-stage heat exchanger. 12 through water, the steam produced in the first steam storage tank 23 ...

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PUM

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Abstract

The invention discloses a cooler of a roasting system. The cooler comprises a cooling tower, heat exchangers, an air storage tank and an air locking device, wherein the air storage tank is provided with an air outlet; the cooling tower is provided with a discharging hole and a feeding hole with the air locking device; a distribution cone and a reducing gas outlet are arranged at the feeding hole inside the cooling tower; a permeable plate and a reducing gas inlet are arranged at the discharging hole; the multistage heat exchangers are arranged in parallel between the distribution cone and the permeable plate; the cooling tower is also provided with a water replenishing port and a steam outlet; the inlet of the final-stage heat exchanger is connected with the water replenishing port; the inlet of the first-stage heat exchanger is connected with the air outlet on the air storage tank; and the outlet of the first-stage heat exchanger is connected with the stream outlet; and inlets and outlets of all intermediate-stage heat exchangers are connected with the air storage tank arranged outside the cooling tower. The invention also discloses a cooling method for materials with higher thermal capacity by using the cooler. High-temperature fine oxidized iron ores and iron powder blocks with higher thermal capacity can be rapidly cooled by utilizing endothermic reaction; and the cooler is high in capacity, energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to a cooler for roasting fine-grained weak magnetic iron oxide ore (hematite, limonite, siderite, etc.) into strong magnetic magnetite, and also relates to a furnace in the production process of reduced iron powder After cooler, and relates to the method of using the cooler to cool materials. Background technique [0002] With the rapid development of my country's economy, the demand for iron ore has increased significantly. However, due to the limitation of resource conditions, people use weak magnetic iron oxide ore (hematite (Fe 2 o 3 ), limonite (2 Fe 2 o 3 ·3H 2 O), siderite (FeCO 3 ) etc.) more and more attention to beneficiation. Only by using weakly magnetic iron oxide ore and expanding industrial resource reserves can this growing demand be met. With the application of roller presses to iron ore grinding, the efficiency of iron ore crushing into fine powder has been greatly improved, but the magnetic separation of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/26
Inventor 何亚民魏勇徐智平
Owner CHENGDU LEEJUN IND