HOWARD DON DAVIS
Accountancy in Pittsburgh, PA
License number
Pennsylvania CA015776L
Category
Accountancy
Type
Certified Public Accountant
Address
Address
Pittsburgh, PA 15219
Professional information
Method For Producing Cement Clinker From Cement Kiln Waste Dust
US Patent:
4249952, Feb 10, 1981
Filed:
Mar 3, 1980
Appl. No.:
6/126189
Inventors:
Howard F. Davis - Pittsburgh PA
John A. Persson - Gibsonia PA
John A. Persson - Gibsonia PA
Assignee:
Pennsylvania Engineering Corporation - Pittsburgh PA
International Classification:
C04B 736
US Classification:
106103
Abstract:
A method is disclosed for obtaining useful products from cement kiln waste dust. The dust is collected and added to an electric arc furnace where it is melted. The temperatures required to melt the dust are sufficiently high that alkali sulfates present in the dust are volatilized, leaving a melt which has a composition acceptable for the production of cement clinker. The volatilized components are collected to form a second useful product; i. e. , a potassium rich material suitable for the production of potassium bearing chemicals, such as fertilizers.
Method Of Producing Cement
US Patent:
4289537, Sep 15, 1981
Filed:
Mar 6, 1980
Appl. No.:
6/127556
Inventors:
Howard F. Davis - Pittsburgh PA
John A. Persson - Gibsonia PA
John A. Persson - Gibsonia PA
Assignee:
Lectromelt Corporation - Pittsburgh PA
International Classification:
C04B 732
US Classification:
106100
Abstract:
Tricalcium silicate materials useful in the production of Portland and other cements are prepared by melting a mixture of materials comprising basically line and silica in an electric furnace. The voltage between the electrodes and the conductivity of the melt are controlled so that a predetermined separation will be maintained between the lower end of the carbon electrode and the melt.