This movie, still a good one to watch for the 50th time on late night cable, shows that movies don't have to be members of the "Science Fiction" or "Cartoon" genres to showcase science errors. Aside from the historical errors and omissions in this movie, there are two segments that exhibit GLARING examples of BAD SCIENCE.
In the extraction of tin, the ore is first ground and washed to remove all impurities and then roasted to oxidize the sulfides of iron and copper. After a second washing, the ore is reduced by carbon in a reverberatory furnace; the molten tin that collects on the bottom is drawn off and molded into blocks known as block tin. In this form, the tin is resmelted at low temperatures; the impurities form an insoluble mass. Tin may also be purified by electrolysis.
Wow! Alot-O-Work for these Merry Men, don't you think?
Aluminum is the most abundant metallic constituent in the crust of the earth; only the nonmetals oxygen and silicon are more abundant. Aluminum is never found as a free metal; commonly as aluminum silicate or as a silicate of aluminum mixed with other metals such as sodium, potassium, iron, calcium, and magnesium. These silicates are not useful ores, for it is chemically difficult, and therefore an expensive process, to extract aluminum from them. Bauxite, an impure hydrated aluminum oxide, is the commercial source of aluminum and its compounds. In 1886 Charles Martin Hall in the United States and Paul L. T. Héroult in France independently and almost simultaneously discovered that alumina, or aluminum oxide, would dissolve in fused cryolite (Na3AlF6) and could then be decomposed electrolytically to a crude molten metal. A low-cost technique, the Hall-Héroult process, is still the major method used for the commercial production of aluminum, although new methods are under study. The purity of the product has been increased until a commercially pure ingot is 99.5 percent pure aluminum; it can be further refined to 99.99 percent.
The basic materials used for the manufacture of pig iron are iron ore, coke, and limestone. The coke is burned as a fuel to heat the furnace; as it burns, the coke gives off carbon monoxide, which combines with the iron oxides in the ore, reducing them to metallic iron. This is the basic chemical reaction in the blast furnace; it has the equation: Fe 2 O 3 + 3CO = 3CO 2 + 2Fe. The limestone in the furnace charge is used as an additional source of carbon monoxide and as a “flux” to combine with the infusible silica present in the ore to form fusible calcium silicate. Without the limestone, iron silicate would be formed, with a resulting loss of metallic iron. Calcium silicate plus other impurities form a slag that floats on top of the molten metal at the bottom of the furnace. Ordinary pig iron as produced by blast furnaces contains iron, about 92 percent; carbon, 3 or 4 percent; silicon, 0.5 to 3 percent; manganese, 0.25 to 2.5 percent; phosphorus, 0.04 to 2 percent; and a trace of sulfur. A typical blast furnace consists of a cylindrical steel shell lined with a refractory, which is any nonmetallic substance such as firebrick. The shell is tapered at the top and at the bottom and is widest at a point about one-quarter of the distance from the bottom. The lower portion of the furnace, called the bosh, is equipped with several tubular openings or tuyeres through which the air blast is forced. Near the bottom of the bosh is a hole through which the molten pig iron flows when the furnace is tapped, and above this hole, but below the tuyeres, is another hole for draining the slag. The top of the furnace, which is about 27 m (about 90 ft) in height, contains vents for the escaping gases, and a pair of round hoppers closed with bell-shaped valves through which the charge is introduced into the furnace. The materials are brought up to the hoppers in small dump cars or skips that are hauled up an inclined external skip hoist.Were these guys GOOD or WHAT?
So, what have we learned? Robin was not a Fizzisist! There are other minor problems with the movie, but, HEY!