Device and process for inhibiting particulate emission by cooling of displaceable hot products using a conveyor

Patent metadata

Field	Value
Publication number	US-11788169-B2
Application number	US-201916725977-A
Country	US
Kind code	B2
Filing date	Dec 23, 2019
Priority date	Dec 27, 2018
Publication date	Oct 17, 2023
Grant date	Oct 17, 2023

Abstract

This invention relates to a device for inhibiting particulate emission by cooling of displaceable hot products using a conveyor comprising a first plurality of tubular elements configured to release a first dosage of water over the products, a second plurality of tubular elements configured to release a second dosage of water over the products and wherein the first dosage released by the first plurality of tubular elements is greater than the second dosage released by the second plurality of tubular elements. This invention also relates to a process for inhibiting particulate emission by cooling displaceable hot products using a conveyor.

First claim

The invention claimed is:

1. A device for inhibiting particulate emission by cooling of displaceable hot products using a conveyor comprising:
a first plurality of tubular elements configured to release a first dosage of water over hot products;
a second plurality of tubular elements configured to release a second dosage of water over hot products;
wherein the first dosage released by the first plurality of tubular elements is greater than the second dosage released by the second plurality of tubular elements,
wherein the second plurality of tubular elements comprises a tubular element disposed at a first side end of the device and another tubular element disposed at a second side end of the device, and
wherein tubular elements of the second plurality of tubular elements release equal dosages of water over respective side regions of the conveyor.

2. The device according to claim 1 , wherein each tubular element of the first and second pluralities of tubular elements comprises a valve; and wherein the first plurality of tubular elements comprises two to four tubular elements, and is configured to release the first dosage of water over a central region of the conveyor in a direction against a flow of hot products.

3. The device according to claim 1 , wherein the first plurality of tubular elements is arranged in a central region of the device.

4. The device according to claim 1 , wherein each tubular element of the first plurality of tubular elements comprises a duck nozzle.

5. The device according to claim 1 , wherein the second plurality of tubular elements comprises two to four tubular elements, and is configured to release the second dosage of water on the side regions of the conveyor.

6. A process for inhibiting particulate emission by cooling displaceable hot products by a conveyor using a device as defined in claim 1 , wherein the device is disposed in a position transverse to a direction of travel of the conveyor, the process comprising:
releasing the first dosage of water over the hot products by the first plurality of tubular elements; and
releasing the second dosage of water over the hot products by the second plurality of tubular elements; and
wherein the first dosage released by the first plurality of tubular elements is greater than the second dosage released by the second plurality of tubular elements.

7. The process according to claim 6 , wherein the releasing of the first dosage of water and the releasing of the second dosage of water are concomitant.

8. The process according to claim 6 , wherein the first dosage of water is from 75 to 90% of a total dosage of water and the second dosage of water is from 10 to 25% of the total dosage of water.

9. The process according to claim 6 , wherein each tubular element of the first and second pluralities of tubular elements comprises a valve; and wherein the first dosage of water is released over a central region of the conveyor in a direction against a flow of the hot products by the first plurality of tubular elements.

10. The process according to claim 6 , wherein the second dosage of water is released on the side regions of the conveyor by the second plurality of tubular elements.

11. The process according to claim 8 , wherein the first dosage is fractionated into a 60% portion of the total dosage of water, released by the tubular element located in a center of the device, and into two 10% portions of the total dosage of water, released by each tubular element adjacent to a center tubular element, and/or the second dosage of water comprises two 5% to 12.5% dosage portions released on each side of the conveyor.

12. The process according to claim 6 , wherein the hot products are iron ore pellets.

13. The process according to claim 6 , wherein a total dosage of water added comprises the first and second dosages of water and is from 1 to 7% of a mass of hot products.

14. The process according to claim 6 , wherein the first dosage of water is 80% and the second dosage of water is 20% of a total dosage of water.

15. The process according to claim 14 , wherein the second dosage of water comprises two 10% dosage portions released by each tubular element of the second plurality of tubular elements on each side of the conveyor.

16. The device of claim 1 , wherein the first plurality of tubular elements comprises three tubular elements, and wherein the second plurality of tubular elements comprises two tubular elements.

Assignees

• Vale Sa

Inventors

• Ribeiro Lucilio Bertoldi
• Fazollo Francisco Magalhães

Classifications

• C22B1/26 Primary

  Cooling of roasted, sintered, or agglomerated ores · CPC title

• F27D15/0206

  with means to convey the charge · CPC title