METHOD TO ARTIFICIALLY AGGLOMERATE FINELY DIVIDED MATERIALS

• US 20180105463A1
• Filed: 05/26/2015
• Published: 04/19/2018
• Est. Priority Date: 05/26/2015
• Status: Active Grant

• Current Assignee: Cemex Innovation Holding Ltd.
• Original Assignee: Cemex Research Group AG (Cemex, S.A.B. De C.V.)
• Inventors: ZAMPINI, Davide, GUERINI, Alexandre, VOLPATTI, Giovanni
• Granted Patent: US 10,640,423 B2
• Time in Patent Office: Days
• CPC Class Codes: C04B 14/06 Quartz; Sand
• CPC Class Codes: C04B 14/10 Clay sepiolite C04B14/042; grog C04B18/025
• CPC Class Codes: C04B 18/021 agglomerated by a mineral binder, e.g. cement
• CPC Class Codes: C04B 18/08 Flue dust , i.e. fly ash
• CPC Class Codes: C04B 18/141 Slags
• CPC Class Codes: C04B 18/146 Silica fume
• CPC Class Codes: C04B 18/16 from building or ceramic industry
• CPC Class Codes: C04B 18/162 Cement kiln dust; Lime kiln dust
• CPC Class Codes: C04B 18/167 Recycled materials, i.e. waste materials reused in the production of the same materials
• CPC Class Codes: C04B 2103/008 Flocking or deflocking agents
• CPC Class Codes: C04B 2103/32 Superplasticisers
• CPC Class Codes: C04B 2111/0075 for road construction
• CPC Class Codes: C04B 24/02 Alcohols; Phenols; Ethers
• CPC Class Codes: C04B 24/04 Carboxylic acids; Salts, anhydrides or esters thereof
• CPC Class Codes: C04B 24/121 Amines, polyamines
• CPC Class Codes: C04B 24/14 Peptides; Proteins; Derivatives thereof
• CPC Class Codes: C04B 24/18 Lignin sulfonic acid or derivatives thereof, e.g. sulfite lye
• CPC Class Codes: C04B 24/223 Sulfonated melamine-formaldehyde condensation products
• CPC Class Codes: C04B 24/226 Sulfonated naphtalene-formaldehyde condensation products
• CPC Class Codes: C04B 24/2641 Polyacrylates; Polymethacrylates
• CPC Class Codes: C04B 24/2647 : containing polyether side chains
• CPC Class Codes: C04B 24/2652 : Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles
• CPC Class Codes: C04B 24/32 : Polyethers, e.g. alkylphenol polyglycolether
• CPC Class Codes: C04B 24/38 : Polysaccharides or derivatives thereof C04B24/243 takes precedence
• CPC Class Codes: C04B 24/383 : Cellulose or derivatives thereof
• CPC Class Codes: Y02W 30/91 : Use of waste materials as fillers for mortars or concrete

Abstract

Method to artificially agglomerate finely divided materials. A method to agglomerate finely divided material into aggregates, the aggregates being larger than the finely divided material, comprising the steps of (a) mixing finely divided material, binder and water in a mixer, (b) adding an agglomerating agent to the mix formed in step (a) and mixing constantly. Finely divided material is selected from the group consisting of cement, sand, clay, glass, slag, fly ash, stone powder, bypass dust, limestone, silica fume, crushed brick, brick powder and crushed stone or a combination thereof.

Claims

1. A method to agglomerate finely divided material into aggregates, the aggregates being larger than the finely divided material, comprising the steps of:

(a) mixing finely divided material, binder and water in a mixer,

(b) adding an agglomerating agent to the mix formed in step (a) and

(c) mixing constantly.

2. Method according to claim 1, wherein in step (a) finely divided material, binder and water are added simultaneously.

3. Method according to claim 1, wherein in step (a) water and binder are added gradually to said finely divided material.

4. Method according to claim 1, wherein said finely divided material is selected from the group consisting of cement, sand, clay, glass, slag, fly ash, stone powder, bypass dust, limestone, silica fume, crushed brick, brick powder and crushed stone and a combination thereof.

5. Method according to claim 1, wherein said finely divided material is at a concentration in the range of 0.1 ton/m³ to 3.2 ton/m³ with respect to the final mix.

6. Method according to claim 1, wherein said binder is selected from the group consisting of powder cement, cement mixed in water, mortar, concrete not yet set, returned concrete, lime, bypass dust, silica fume, fly ash and slag and a combination thereof.

7. Method according to claim 1, wherein said binder is at a concentration in the range of 10 to 1000 kg/m³ with respect to the final mix.

8. Method according to claim 1, wherein in step (a) a superplasticizer is added to the mix.

9. Method according to claim 8, wherein said superplasticizer is selected from the group consisting of melamine, naphthalene, lignosulfonate and polycarboxylates and a combination thereof.

10. Method according to claim 8, wherein the solid active content of the superplasticizer is at a concentration in the range of 0.1 kg/m³ to 10 kg/m³.

11. Method according to claim 1, wherein in step (a) water to binder ratio is in the range of 0.5 to 10.

12. Method according to claim 1, in that wherein said agglomerating agent is selected from the group consisting of cellulose, chitosan, polyacrylics, polyamines, polyethylene imines, polyvinylalcohols, polysaccharides, polyacrylamides, and co-polymers thereof, collagen, acrylamide, lactic acid, methacrylic acid, methacrylate, hydroxyethyl, ethylene glycol, ethylene oxide, acrylic acid, inorganic flocculants, and inorganic coagulants or and a combination thereof.

13. Method according to claim 1, wherein said agglomerating agent is inorganic flocculants or polysaccharides.

14. Method according to claim 1, wherein the solid active content of the agglomerating agent is at a concentration in the range of 0.1 kg/m³ to 5 kg/m³.

15. Method according to claim 1, wherein the aggregates obtained in step (c) are poured out of the mixer and dried for at least 6 hours.

16. Method according to claim 1, wherein the aggregates obtained in step (c) has an agglomerability of at least 30, where said “

Agglomerability”

is defined as

17. Method according to claim 1, wherein in step (a) a nucleating agent is added to the mix.

18. Method according to claim 17, wherein said nucleating agent is selected from the group consisting of cement, sand, clay, glass, slag, fly ash, stone powder, bypass dust, limestone and silica fume and a combination thereof.