US 11,699,533 B2
Advanced lead-free radiation protection materials utilizing modified brine sludge composition and the process thereof
Sarika Verma, Madhya Pradesh (IN); Medha Mili, Madhya Pradesh (IN); Mohammed Akram Khan, Madhya Pradesh (IN); Sunil Kumar Sanghi, Madhya Pradesh (IN); Syed Azhar Rasheed Hashmi, Madhya Pradesh (IN); Sanjai Kumar Singh Rathore, Madhya Pradesh (IN); and Avanish Kumar Srivastava, Madhya Pradesh (IN)
Assigned to COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH AN INDIAN REGISTERED BODY INCORPORATED UNDER THE REGN. OF SOC. ACT (ACT XXI OF 1860), New Delhi (IN)
Filed by COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH AN INDIAN REGISTERED BODY INCORPORATED, New Delhi (IN)
Filed on Oct. 19, 2021, as Appl. No. 17/451,412.
Claims priority of application No. 202011045583 (IN), filed on Oct. 19, 2020.
Prior Publication US 2022/0119310 A1, Apr. 21, 2022
Int. Cl. G21F 1/04 (2006.01); C04B 14/10 (2006.01); C04B 14/34 (2006.01); C04B 18/04 (2006.01); C04B 22/06 (2006.01); C04B 28/26 (2006.01); B28B 3/02 (2006.01); C04B 111/00 (2006.01)
CPC G21F 1/042 (2013.01) [C04B 14/10 (2013.01); C04B 14/34 (2013.01); C04B 18/0436 (2013.01); C04B 22/062 (2013.01); C04B 28/26 (2013.01); B28B 3/02 (2013.01); C04B 2111/00862 (2013.01)] 4 Claims
 
1. A process for making an advanced lead-free radiation protection material utilizing modified brine sludge composition, the process comprising:
a. drying of 200 g-800 g of brine sludge in an air oven at 100° C.-110° C. for a period of 1-2 hours to produce a heat-treated brine sludge, followed by simultaneous solid state reaction processing and dry grinding with 20-90 g of tungsten powder and 10 g-60 g metakaolin for a period of 2-4 hours;
b. after step a, adding and grinding 2 g-8 g potassium hydroxide for a period of 1-2 hrs and further adding and grinding 1 g-4 g potassium silicate for a period of 1-2 hrs to obtain fine homogeneous radiation protection powder of modified brine sludge composition;
c. after step b, adding and thoroughly blending with 4 ml-16 ml of water and compacting in a steel mold by providing hydraulic pressure in the range of 100-300 kg/cm2 to obtain tiles; and
d. after step c, heating the tiles in a furnace in the temperature range of 900° C.-1100° C. for a period of 1-2 hours to obtain the advanced lead-free radiation protection material.