US3977892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agglomeration of finely divided particles
Assignee: Individual
•
Filing: 1973-09-24
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Granted: 1976-08-31
•
Expires: 1993-09-24
Abstract
Abstract Strong aggregates of high density are produced from fine particles by heating said particles, then combining a binder solution comprising a saturated, dendritic crystal-forming aqueous sodium chloride solution heated to a temperature below the temperature of the heated particles, mixing thoroughly said heated particles and said heated binder solution in a ratio of 10 to 20 grams, preferably 14 to 18 grams, of particles per milliliter of binder solution, shaping the resulting mixture under pressure and cooling the shaped mixture to recrystallize said binder solution and provide said agglomerate. Aggregates of high porosity and strength can be prepared from siliceous materials such as fly ash by heating the product agglomerated to a temperature of 1600°F-1825°F.
Inventors
- 👤 Edward Y. Crossmore, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:40
CPC Classifications
C; C04; C04B; C04B12/00; C04B18/00; C04B18/02; C04B18/023; C09; C09K; C09K5/00; C09K5/02; C09K5/06; C09K5/066; Y; Y10; Y10S; Y10S106/00; Y10S106/01
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
101 words
A method of agglomerating finely-divided particles selected from carbonaceous combustible materials, siliceous materials and crystalline inorganic materials which comprises preheating said particles to an elevated temperature of about 150° to 170°C, preheating a binder solution comprising a saturated, dendritic crystal-forming aqueous sodium chloride solution to an elevated temperature below the temperature of said preheated particles, mixing thoroughly said preheated particles and said preheated binder solution in a ratio of about 10 to 20 grams of particles per milliliter of binder solution, shaping the resulting mixture under pressure and cooling the shaped mixture to recrystallize said binder solution and provide said agglomerate.
Claim 2
Independent Claim
101 words
A method of agglomerating finely-divided particles selected from carbonaceous combustible materials, siliceous materials and crystalline inorganic materials which comprises preheating said particles to an elevated temperature of about 150° to 170°C, preheating a binder solution comprising a saturated, dendritic crystal-forming aqueous sodium chloride solution to an elevated temperature below the temperature of said preheated particles, mixing thoroughly said preheated particles and said preheated binder solution in a ratio of about 10 to 20 grams of particles per milliliter of binder solution, shaping the resulting mixture under pressure and cooling the shaped mixture to recrystallize said binder solution and provide said agglomerate.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein the ratio of particles to binder solution is about 14 to 18 grams of particles per ml. of binder solution.
Claim 4
Dependent Claim
38 words
An aggregate of solid, finely-divided particles selected from carbonaceous combustible materials, siliceous materials and crystalline inorganic materials, bonded together essentially by dendritic sodium chloride crystals, said particles having a particle size of about 1 micron to -20 mesh.
Claim 5
Dependent Claim
38 words
An aggregate of solid, finely-divided particles selected from carbonaceous combustible materials, siliceous materials and crystalline inorganic materials, bonded together essentially by dendritic sodium chloride crystals, said particles having a particle size of about 1 micron to -20 mesh.
Claim 6
Dependent Claim
16 words
The method of claim 1 wherein the aqueous sodium chloride solution is of mineral rock salt.
Claim 7
Dependent Claim
30 words
The method of claim 1 wherein the finely divided particles are siliceous materials and the cooled shaped agglomerate is roasted at a material surface temperature of at least about 1600°F.
Claim 8
Dependent Claim
20 words
The method of claim 5 wherein the roasting is conducted at a material surface temperature of about 1600°F to 1825°F.
Claim 9
Dependent Claim
12 words
The method of claim 6 wherein the siliceous material comprises fly ash.
Claim 10
Dependent Claim
11 words
The method of claim 5 wherein the siliceous material is silica.
Claim 11
Independent Claim
106 words
A method of producing shaped agglomerates of finely-divided particles consisting essentially of fly ash which comprises preheating said particles to a temperature of 155°F to 165°F, preheating a binder solution comprising a saturated, dendritic crystal-forming sodium chloride solution to a temperature of about 150°F, mixing thoroughly said preheated particles and said saturated binder solution in a ratio of about 14 to 18 grams of particles per milliliter of solution, shaping the mixture under a pressure of 20,000 to 25,000 lbs/lineal nip inch, cooling the shaped mixture to recrystallize said binder and roasting the resulting shaped agglomerate at a material surface temperature of about 1600°F to 1825°F.
Claim 12
Independent Claim
106 words
A method of producing shaped agglomerates of finely-divided particles consisting essentially of fly ash which comprises preheating said particles to a temperature of 155°F to 165°F, preheating a binder solution comprising a saturated, dendritic crystal-forming sodium chloride solution to a temperature of about 150°F, mixing thoroughly said preheated particles and said saturated binder solution in a ratio of about 14 to 18 grams of particles per milliliter of solution, shaping the mixture under a pressure of 20,000 to 25,000 lbs/lineal nip inch, cooling the shaped mixture to recrystallize said binder and roasting the resulting shaped agglomerate at a material surface temperature of about 1600°F to 1825°F.
Claim 13
Dependent Claim
16 words
The method of claim 9 wherein the aqueous sodium chloride solution is of mineral rock salt.
Claim 14
Dependent Claim
13 words
The method of claim 9 wherein the roasting temperature is 1625°F to 1700°F.
Claim 15
Dependent Claim
12 words
The method of claim 9 wherein the shape is conducted by briquetting.
Claim 16
Dependent Claim
17 words
The method of claim 1 wherein the particles size is about 1 micron to minus 20 mesh.
Claim 17
Dependent Claim
17 words
The method of claim 1 wherein the particle size is about 1 micron to minus 40 mesh.
Claim 18
Dependent Claim
12 words
The method of claim 1 wherein the particles comprise crystalline inorganic materials.
Claim 19
Dependent Claim
13 words
The method of claim 15 wherein the crystalline inorganic material is rock salt.
Claim 20
Dependent Claim
13 words
The method of claim 15 wherein the crystalline inorganic material is calcium chloride.
Claim 21
Dependent Claim
19 words
The method of claim 15 wherein the crystalline inorganic material is a mixture of rock salt and calcium chloride.
Claim 22
Dependent Claim
14 words
The method of claim 1 wherein the particles are comprised of carbonaceous combustible materials.
Claim 23
Dependent Claim
12 words
The method of claim 1 wherein the finely-divided particles are coal particles.
References Cited (Backward Citations)
US2140850A
Cited
US2988509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |