Method for using cold rolling magnetic filtration waste

Patent metadata

Field	Value
Publication number	US-11180708-B2
Application number	US-201916960132-A
Country	US
Kind code	B2
Filing date	Jan 11, 2019
Priority date	Jan 9, 2018
Publication date	Nov 23, 2021
Grant date	Nov 23, 2021

Abstract

Disclosed is a method for using cold rolling magnetic filtration waste, comprising using the cold rolling magnetic filtration waste as a fluxing agent for a high-ash-fusion coal so as to achieve the technical requirements of a high melting point coal in dry coal powder gasification and liquid slagging. The cold rolling magnetic filtration waste contains solid particulates with very fine particles (iron-containing particles mainly produced by friction), and the surface thereof has a cold rolling oil attached thereto, and same reacts with other aluminosilicates in coal ash at a high temperature to produce low temperature eutectic compounds such as fayalite (Fe 2 SiO 4 ) and hercynite (Fe 2 Al 2 O 4 ). The fluxing agent has characteristics such as having fine particles, being free of inorganic mineral substances, having an effective ingredient in a high content, operation thereof being simple, and being free of pollution.

First claim

What is claimed is:

1. A method for reducing an ash flow temperature of a high-ash-melting-point coal having an ash melting point of not less than 1450° C., comprising mixing a cold-rolling magnetic filtration waste with the high-ash-melting-point coal by
using the cold-rolling magnetic filtration waste as a flux and the high-ash-melting-point coal as a matrix.

2. The method of claim 1 , wherein a weight ratio of the cold-rolling magnetic filtration waste to the matrix is from 1:1 to 1:5.

3. The method of claim 1 , wherein the cold-rolling magnetic filtration waste comprises a solid particulate matter and rolling oil adsorbed on a surface of the solid particulate matter, wherein the solid particulate matter has an average particle diameter of less than 5 μm, wherein the solid particulate matter comprises iron-containing particles generated by friction.

4. The method of claim 3 , wherein a mass fraction of the rolling oil in the cold-rolling magnetic filtration waste is 40-80%.

5. The method of claim 4 , wherein the rolling oil consists of lubricating base oil and an additive.

6. The method of claim 3 , wherein after the cold-rolling magnetic filtration waste is mixed with the coal powder, the mass of the solid particulate matter is from 0.5 to 5% based on the mass of coal ash in the coal powder.

7. The method of claim 6 , wherein the mass of the solid particulate matter is from 1 to 3% based on the mass of the coal ash in the coal powder.

8. The method of claim 2 , wherein the cold-rolling magnetic filtration waste comprises a solid particulate matter and rolling oil adsorbed on a surface of the solid particulate matter, wherein the solid particulate matter has an average particle diameter of less than 5 μm, wherein the solid particulate matter comprises iron-containing particles generated by friction.

9. The method of claim 8 , wherein a mass fraction of the rolling oil in the cold-rolling magnetic filtration waste is 40-80%.

10. The method of claim 9 , wherein the rolling oil consists of lubricating base oil and an additive.

Assignees

• Baoshan Iron & Steel

Inventors

• Wang Kangjian
• Qu Peilei

Classifications

• C10L2250/06

  Particle, bubble or droplet size · CPC title

• C10L2290/24

  Mixing, stirring of fuel components · CPC title

• C10L9/10 Primary

  by using additives · CPC title

• C10L2290/04

  Gasification · CPC title

• C10L10/04

  for minimising corrosion or incrustation · CPC title