Foundrymen, boilermakers, and other persons who labor or furnish materials for the construction, alteration, repair or operation of a mill, factory or hoisting works at the request of the owner shall have a lien thereon for the amount due. If the hoist, factory or mill is located on property not belonging to the owner of the hoist, factory or mill, the purchaser at the sale on foreclosure of the lien may remove them within sixty days after the sale, whether the hoist, factory or mill is a fixture or not. If the hoist, factory or mill is located on a mine, mining claim or mill site which is the property of the owner, the lien shall embrace the surface ground, not exceeding five acres, upon which the hoist, factory or mill is located.