US 11,815,480 B2
X-ray fluorescence analyzer and a method for performing an x-ray fluorescence analysis
Tommi Koskinen, Espoo (FI); Antti Pelli, Espoo (FI); and Heikki Sipilä, Espoo (FI)
Assigned to OUTOTEC (Finland) OY, Espoo (FI)
Appl. No. 17/049,256
Filed by Outotec (Finland) Oy, Espoo (FI)
PCT Filed Apr. 20, 2018, PCT No. PCT/FI2018/050281
§ 371(c)(1), (2) Date Oct. 20, 2020,
PCT Pub. No. WO2019/202197, PCT Pub. Date Oct. 24, 2019.
Prior Publication US 2021/0255121 A1, Aug. 19, 2021
Int. Cl. G01N 23/223 (2006.01); G21K 1/06 (2006.01)
CPC G01N 23/223 (2013.01) [G21K 1/06 (2013.01); G01N 2223/076 (2013.01); G01N 2223/635 (2013.01); G21K 2201/062 (2013.01); G21K 2201/064 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An X-ray fluorescence analyzer, comprising:
an X-ray tube for emitting incident X-rays in a direction of a first optical axis,
a first radiation detector,
a slurry handling unit configured to maintain a constant distance between a sample of slurry and said X-ray tube,
a first crystal diffractor located in a first direction from said slurry handling unit, said first crystal diffractor being configured to separate a predefined first wavelength range from fluorescent X-rays that propagate into said first direction, and configured to direct the fluorescent X-rays in the separated predefined first wavelength range to said first radiation detector, wherein:
the X-ray tube has an input power rating of at least 400 watts,
the first crystal diffractor comprises a pyrolytic graphite crystal,
an optical path between said X-ray tube and said slurry handling unit is direct with no diffractor therebetween, and
said slurry handling unit comprises a sample chamber having a sample window in a wall of said sample chamber for allowing X-rays to pass through while keeping said sample of slurry within said sample chamber.