US4417529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for melting and treating waste
Assignee: Kubota Corp
•
Filing: 1982-02-19
•
Granted: 1983-11-29
•
Expires: 2002-02-19
Abstract
Abstract A method for melting and treating waste to be treated such as waste water treatment sludge and incinerated ash of garbage involves mixing the waste to be treated with an auxiliary fuel in powder, granular or solid form or in the form of mixture thereof which has its own calorie value. Powder coal, coal, coke, waste plastic material, saw-dust, waste paper, carbonized material and used tires can be used as an auxiliary fuel. In addition to the auxiliary fuel, an additive is admixed for adjusting the composition of the waste to have treated so as to be a specific composition ratio.
Inventors
- 👤 Tadao Fujimoto
- 👤 Hiroyuki Fujiuchi
- 👤 Kenichi Shimizu
- 👤 Seiichiro Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:54
CPC Classifications
F; F23; F23G; F23G5/00; B; B09; B09B; B09B3/00; B09B3/20; B09B3/25; B09B3/29; B09B3/30; B09B3/35; C; C02; C02F; C02F11/00; C03; C03B; C03B5/00; C03B5/005; F23G5/08; F23G5/085; Y; Y02; Y02P; Y02P40/00; Y02P40/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
123 words
A method for melting and treating waste to be treated such as waste water treatment sludge and incinerated ash of garbage, comprising the following steps; mixing the waste to be treated with an auxiliary fuel in powder, granular or solid form or in the form of a mixture of powder, granular and solid fuel components, which has its own calorie value, further mixing said waste to be treated with an additive so that said waste to be treated has the composition ratio of 40˜60% of SiO 2 , 5˜25% of Al 2 O 3 and 15˜55% (by weight) of material consisting of the substances selected from the classes containing FeO, CaO, K 2 O and Na 2 O and melting the resulting mixture.
Claim 2
Independent Claim
123 words
A method for melting and treating waste to be treated such as waste water treatment sludge and incinerated ash of garbage, comprising the following steps; mixing the waste to be treated with an auxiliary fuel in powder, granular or solid form or in the form of a mixture of powder, granular and solid fuel components, which has its own calorie value, further mixing said waste to be treated with an additive so that said waste to be treated has the composition ratio of 40˜60% of SiO 2 , 5˜25% of Al 2 O 3 and 15˜55% (by weight) of material consisting of the substances selected from the classes containing FeO, CaO, K 2 O and Na 2 O and melting the resulting mixture.
Claim 3
Dependent Claim
30 words
The method in accordance with claim 1, wherein said auxiliary fuel in powder, granular or massive form or in the form of a mixture thereof comprises powder coal or coke.
Claim 4
Dependent Claim
29 words
The method in accordance with claim 1, wherein said waste to be treated comprises a waste water treatment sludge, and said additive comprises an incinerated ash of the waste.
Claim 5
Dependent Claim
26 words
The method in accordance with claim 3, wherein said additive is mixed with iron oxide or a substance the main component of which is iron oxide.
Claim 6
Dependent Claim
24 words
The method in accordance with claim 1, wherein said additive comprises iron oxide or a substance the main component of which is iron oxide.
Claim 7
Dependent Claim
22 words
The method in accordance with claim 4 or 5, wherein iron oxide or said substance comprises a waste material including iron oxide.
Claim 8
Dependent Claim
28 words
The method in accordance with claim 1, wherein said waste to be treated comprises a sludge from a water purification plant, and said additive comprises a sewage sludge.
Claim 9
Dependent Claim
28 words
The method in accordance with claim 1, wherein said waste to be treated comprises a sewage sludge, and said additive comprises a sludge from a water purification plant.
Claim 10
Dependent Claim
28 words
The method in accordance with claim 1, wherein said waste to be treated and said additive comprise two sewage sludges which have different compositions relative to each other.
References Cited (Backward Citations)
US4331088A
Cited
US4346661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-28 | 1987-05-30 | 1987-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-28 | 1991-05-30 | 1991-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-28 | 1995-05-30 | 1995-11-29 | $7700.00 | Window Closed / Lapsed |