Slurry abrasion response test

G 75 Test Method for Determination of Slurry Abrasivity (Miller Number) and Slurry Abrasion Response of... 

The American Society for Testing of Materials (Miller, 1987) has adopted the concept of the MUler number as a measure of the abrasivity of slurries. Standard G-75 describes the relative abrasivity based on the mass loss of a standard 27% chrome white iron block when rubbed in slurry for a particular period of time. To conduct the test and to measure the slurry abrasion response (SAR) number, also called Miller number, a special machine (Figure 10-5) is used. It consists of a wear block driven at 48 strokes per minute with a stroke length of 200 mm (8 in). A dead weight of 2.27 kg [5 lb] is applied to the wear block. At the bottom of the tray, a piece of Neoprene is installed to act as a lap. The tray takes the form of a flat bottom between V-shaped walls that confine the slurry around the block. The tray is filled with sand. The mounted blocks are lowered in the trays. Four, 4-hour tests are conduced and the weight of the block is... 

A variety of materials are available for the lining and manufacture of slurry handling equipment and piping. Various selections are available based on the degree of abrasiveness, corrosion, temperature, and presence of oils or solvents. In terms of measurement of wear, the American Society for Testing of Materials has developed a slurry abrasion response (SAR) number, also called Miller number. It is extremely useful for determining the need to line pipelines and pumps. 

ASTM. 1999. ASTM A532/A532M. Standard Specification for Abrasion-Resistant Cast Irons. ASTM. 2001. Test Method G75-01. Standard Test Method for Determination of Slurry Abrasivily (Miller Number) and Slurry Response of Materials (SAR Number). 

Apparent Abrasivity. Typical pumpable slurries possess inherent apparent abrasivity, which must be determined by testing to enable cost predictions for pump replacement parts or other equipment used for slurries. Apparent abrasivity, without inhibition, is the complex synergistic reaction of many factors (Fig. 14). This reaction, known as the Morrison-Miller effect (Ref 6), is such that the wear response of a given material in... 

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