US4082718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tap hole mix
Assignee: Nippon Steel Corp
•
Filing: 1976-05-24
•
Granted: 1978-04-04
•
Expires: 1996-05-24
Abstract
Abstract A tap hole mix for a blast furnace and the like containing essentially no binder comprising either water or one or more of tar, pitch and asphalt with or without the addition of a resin, which comprises refractory materials composed of grains of one or more of clay, chamotte, alumina, silicon carbide and the like and a carbonaceous material, a hardener comprising a novolak-type phenol resin to which a substance which produces formaldehyde by the thermal decomposition or a thermosetting resin is added in a definite proportion, and an alcoholic solvent. The present inventive tap hole mix is rapidly hardened or set, has excellent corrosion resistance and does not cause the occurence of unpleasant smoke and abnormal dusts.
Inventors
- 👤 Teiichi Ando
- 👤 Hidenobu Itoi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:48
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/12; C21B7/125; C08; C08L; C08L61/00; C08L61/04; C08L61/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
In a tap hole mix for a blast furnace composed of refractory materials and a binder, the improvement which comprises said binder consisting essentially of a novolak phenol resin (A) having a mean molecular weight from 200 to 800, a substance which produces formaldehyde by thermal decomposition when subjected to the furnace heat and an alcoholic solvent, the amount of resin being from 3 to 30 percent based on the total mix, the amount of solvent being from 4 to 15 percent based on the total mix, the amount of formaldehyde producing substance being from 0.5 to 10 percent based on the resin and the remainder of the mix being refractory material.
Claim 2
Dependent Claim
112 words
In a tap hole mix for a blast furnace composed of refractory materials and a binder, the improvement which comprises said binder consisting essentially of a novolak phenol resin (A) having a mean molecular weight from 200 to 800, a substance which produces formaldehyde by thermal decomposition when subjected to the furnace heat and an alcoholic solvent, the amount of resin being from 3 to 30 percent based on the total mix, the amount of solvent being from 4 to 15 percent based on the total mix, the amount of formaldehyde producing substance being from 0.5 to 10 percent based on the resin and the remainder of the mix being refractory material.
Claim 3
Dependent Claim
14 words
The mix of claim 1 wherein the formaldehyde producing substance is an acetal resin.
Claim 4
Dependent Claim
21 words
The mix of claim 1 wherein the formaldehyde producing substance is hexamethylene tetramine in an amount from 0.5 to 5 percent.
Claim 5
Dependent Claim
33 words
The mix of claim 1 wherein the alcoholic solvent is selected from the group consisting of methanol, ethanol, isopropyl alcohol, ethylene glycol, diethylene glycol, liquid polyethylene glycol, propylene glycol, glycerine and benzyl alcohol.
Claim 6
Dependent Claim
127 words
In a tap hole mix for a blast furnace composed of refractory materials and a binder, the improvement which comprises said binder consisting essentially of a novolak phenol resin (A) having a mean molecular weight from 200 to 800, a substance which produces formaldehyde by thermal decomposition when subjected to the furnace heat and an alcoholic solvent, the amount of resin being from 3 to 30 percent based on the total mix, the amount of solvent being from 4 to 15 percent based on the total mix, the amount of formaldehyde producing substance being from 0.5 to 10 percent based on the resin, a thermosetting resin (B), the amount of resins (A) and (B) satisfying the relationships: ##EQU11## and the remainder of the mix being refractory material.
Claim 7
Dependent Claim
127 words
In a tap hole mix for a blast furnace composed of refractory materials and a binder, the improvement which comprises said binder consisting essentially of a novolak phenol resin (A) having a mean molecular weight from 200 to 800, a substance which produces formaldehyde by thermal decomposition when subjected to the furnace heat and an alcoholic solvent, the amount of resin being from 3 to 30 percent based on the total mix, the amount of solvent being from 4 to 15 percent based on the total mix, the amount of formaldehyde producing substance being from 0.5 to 10 percent based on the resin, a thermosetting resin (B), the amount of resins (A) and (B) satisfying the relationships: ##EQU11## and the remainder of the mix being refractory material.
Claim 8
Dependent Claim
29 words
The mix of claim 5 wherein the thermosetting resin (B) is selected from the group consisting of resol-type phenol resin, melamine resin, urea resin, analine resin and epoxy resin.
Claim 9
Dependent Claim
33 words
The mix of claim 5 wherein the alcoholic solvent is selected from the group consisting of methanol, ethanol, ispropyl alcohol, ethylene glycol, diethylene glycol, liquid polyethylene glycol, propylene glycol, glycerine and benzyl alcohol.
References Cited (Backward Citations)
US3607809A
Cited
US3678130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |