Claims
- 1. A process for converting an aqueous coal processing waste sludge, containing finely divided coal particles and waste materials from the beneficiation of coal, into a sedentary mass of improved load supportive properties comprising:
- a. providing a concentrated aqueous coal processing waste sludge having a solids content in the range of 20-80 weight percent solids;
- b. adding to the concentrated sludge between 2-50 percent by weight, based on the weight of said solids, of granulated blast furnace slag;
- c. intimately mixing the combined concentrated sludge and granulated blast furnace slag; and
- d. maintaining the resulting mixture in a substantially quiescent stage and in the presence of excess water to produce a sedentary mass.
- 2. The process of claim 1 wherein said aqueous coal processing waste sludge contains less than 20 weight percent solids and wherein mechanical separation of a portion of the water in said sludge is made to increase the solids content thereof to the range of 20-80 weight percent prior to addition of said granulated blast furnace slag.
- 3. The process of claim 1 wherein said granulated blast furnace slag is added in an amount of between 5-25 percent by weight.
- 4. The process defined in claim 1 where said granulated blast furnace slag is ground to a particle size of between 1800-5000 sq. cm. per gram.
- 5. The process defined in claim 1 wherein said granulated blast furnace slag comprises a mixture of a first portion ground to a particle size of between 1800-5000 sq. cm. per gram and a second portion having a particle size coarser that 2500 sq. cm. per gram, with said first portion comprising 50-75 percent by weight of the total mixture of said granulated blast furnace slag.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of our copending application Ser. No. 339,151, filed Mar. 8, 1973, and entitled "Stabilization of Sludge Slurries," now U.S. Pat. No. 3,920,795.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3920795 |
Selmeczi et al. |
Nov 1975 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
339151 |
Mar 1973 |
|