"Metal Minerals and Smelting" Metal PPT Courseware

Description

"Metal Minerals and Smelting" Metal PPT Courseware

learning target:

1. Understand the conditions for metal corrosion and simple ways to prevent metal corrosion.

2. Know the minerals of some common metals such as iron, aluminum, copper, etc., and understand the methods of reducing iron from iron ore.

3. Can perform relevant calculations on reactants or products containing certain impurities based on chemical equations.

Key points:

1. Can perform relevant calculations on reactants or products containing certain impurities based on chemical equations.

The existence form of metal:

Elemental substance (a few, such as gold and silver)

Compounds (most, such as various iron ores)

Except for a few inactive metals such as gold and silver that exist in elemental form, the rest exist in the form of compounds.

1. Iron smelting:

1. Laboratory use of carbon monoxide to reduce iron oxide

The way to prove that there is iron powder in the product is to use a magnet to attract it (or add dilute hydrochloric acid to create bubbles)

①.Assemble the instrument as shown below and check its air tightness.

The reduction of iron oxide by carbon monoxide must be carried out in a closed hard glass tube to prevent carbon monoxide from polluting the air.

②Put a small amount of finely ground iron oxide powder into a hard glass tube.

③Insert the hard glass tube into the device system, and first introduce carbon monoxide gas to remove the air to prevent carbon monoxide and air from mixing and heating and exploding. Light the alcohol lamp at the air outlet (or collect it with a balloon) to prevent carbon monoxide from polluting the air. After it is drained, light the alcohol blowtorch and observe the changes that occur in the device.

④When the reddish-brown powder has turned into black, stop heating, and then add carbon monoxide for a while until the glass tube cools down to prevent Fe from being oxidized.

2.Industrial ironmaking:

Raw materials: iron ore, coke, limestone

⑴Principle:

Coke reacts with O2 under high temperature conditions to generate CO, which is used as a reducing agent to reduce the iron in the iron ore under high temperature conditions.

Chemical equation for the reaction:

Fe2O3+3CO===2Fe+3CO2

CO is a reducing agent; Fe2O3 is an oxidizing agent

⑵Equipment: Ironmaking blast furnace

Fe2O3+3CO===2Fe+3CO2

CO2+C===2CO

C + O2===CO2

3. Calculation of chemical equations for substances containing impurities:

In actual production, the raw materials or products used generally contain impurities. When calculating materials and output, impurities should be taken into consideration.

When listing proportions, be sure to use scalar quantities.

The relationship between impure substances, pure substances, and purity:

m(pure) = m(impure)×purity

m(impure) = m(pure) ÷ purity

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For more information about the PPT courseware "Metals, Metal Minerals and Smelting", please click the Metal ppt Metal Minerals and Smelting ppt tab.

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Update Time: 2024-06-28

This template belongs to Chemistry courseware Cantonese Education Edition Ninth Grade Chemistry Volume 2 industry PPT template

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