Fire-proof cement for iron pipes. Wrought-iron filings 45 parts, clay 20, fire-clay 15, common salt solution 8.
Cements resisting high temperatures. 1. Iron filings 20 parts, clay powder 45, borax 5, common salt 5, pyrolusite 10.
Dissolve the borax and common salt in the water, add and mix quickly the clay powder, pyrolusite, and iron filings. Apply the cement at once. Exposed to a white heat, it hardens to a tightly adhering, glassy mass.
2. Mix 52 parts of pyrolusite, 25 of zinc white, and 5 of borax with solution of water-glass to a paste, and use at once. This cement requires to be gradually dried. It will stand the highest temperatures.
Cement for filling in defects in castings. Stir 100 parts of iron filings free from rust with sufficient water to form a thick paste, and press the mixture into the fissures, cracks, etc. The cement becomes solid only after the iron filings become strongly rusted. To free the ingredients from adhering fat, wash them, before mixing, in liquid ammonia.
Cement for cracked stove plates, etc. Knead 20 parts of iron filings, 12 of iron scale, 30 of plaster of Paris, and 10 of common salt with blood to a stiff paste, and use at once. Instead of blood, water-glass can be used, it having the advantage of being odorless on strong heating, while blood cement evolves a disagreeable odor.
Cement for iron water tanks. Knead iron filings with vinegar to paste. Allow the mixture to stand until it turns brown, and then force it into the joints by means of a chisel.
Cement for cracked iron pots. Knead 10 parts of iron filings and 60 of clay with linseed oil to a thick paste. Before applying it add a little linseed oil, and allow it to dry slowly. In a few weeks the cement will be so hard that the vessels can be used without danger.
Black cement for stoves. Iron filings 10 parts, sand 12, bone black 10, slaked lime 12, glue water 5.
Cements for iron stoves. 1. Pulverize as finely as possible and mix intimately 4 to 5 parts of clay, 2 of iron filings free from rust, 1 of pyrolusite, ½ of common salt, and ½ of borax with water to a paste, and apply the cement quickly to the places to be cemented and allow it to dry slowly. This cement will stand a white heat, and resist the action of boiling water.