"淘洗沙金的人" can be translated into English as "gold panners" or "gold washers".
"Gold panners" refers to those who pan for gold, typically by washing sand or gravel in a pan to separate out the gold.
"Gold washers" is another way to describe the same activity, emphasizing the washing process involved in extracting gold from sand or sediment.
Both terms are commonly used to describe individuals engaged in the activity of extracting gold from sand or sediment through washing.