1. Carbon steel scrap
The thickness of the plate is more than 2mm, the diameter of the wire is more than 4mm, and the unit weight is more than 0.25 kg. Various carbon scraps. These include scrap steel, leftovers, steel products, steel castings, scrap machine parts, steel farm implements, etc., and shall not be mixed with alloy scrap.
2. Alloy steel scrap
The specification requirements are the same as carbon steel scrap, including various alloy steel scraps, mechanical parts, alloy steel castings, etc. Alloy steel shall be separated according to various steel grades, and carbon scrap shall not be mixed.
3. Thin and light materials
Sheet scraps with a thickness of less than 2mm, silicon steel sheets, iron drums, packaging iron sheets, automobile cabs, scrap steel wires, iron wires, and wire ropes with a diameter of less than 4mm. When the yield per ton is below 60%, converter steel production refuses to return to it. Generally, it is similar to light and thin materials, packing, briquetting, etc., which are specially used for power furnace steel production, but converter steel production should depend on resource conditions.
4. Steel shavings
Do not mix iron filings, no impurities, no oxidized lumps, no non-ferrous metals, separate long and short chips, and separate carbon steel chips and alloy steel chips.
5. Waste gray iron
Waste gray iron castings, machine bed bodies, low-pressure valves, ingot molds, sandboxes, radiators, etc., regardless of size.
6. Scrap white iron
Waste white iron castings such as iron pans, plowshares, and steel mills, regardless of size.
7. Secondary iron (commonly known as soil iron)
Both high-sulfur iron and lump-shaped pig iron are smelted in earth blast furnaces, including earth steel ingots, iron slag, etc., regardless of size.
8. Burning iron
Iron castings whose surface has been oxidized and deteriorated after a long-term fire, such as stoves, furnace bars, melting tanks, etc.
9. Forgeable iron (Magang)
All kinds of pipe joints, wrenches, automobile rear axles, mechanical forgeable castings, etc.
10. Pig iron filings
No steel shavings, non-ferrous metals, and other impurities shall be mixed in, and no oxidation and agglomeration shall be allowed.
11. Iron oxide scale
The iron scales that fall off during the steel rolling process of the rolling mill and when the steelmaking plant cleans the steel ingots have an iron content of more than 60%, no impurities, no agglomerates, and no non-ferrous metals.
12. Iron mud
The furnace dust blown out by the oxygen top-blown converter in the steelmaking plant and the iron sludge ground by the grinding plant has an iron content of about 55%.
13. Steel slag
The steel content is required to be above 60%, regardless of size.
14. Primary briquetting
The density is greater than 1.5t/m³.
15. Secondary briquetting
The density is greater than 1t/m³.
16. First-grade pig iron shavings briquetting
The density is greater than 3t/m³.
17. Secondary pig iron filings briquetting
The density is greater than 2t/m3.
18. First-class hot-pressed block
The density is greater than 2t/m3, and the briquette oxidation overburning does not exceed 5%.
19. Secondary hot pressing block
The density is greater than 1.5t/m3, and the oxidized overburning of the briquettes does not exceed 1%-15%.
20. Hand-bundled light materials
The bundling is tight, the loading and unloading truck is not loose, not loose, and the size of the bundling can be conveniently put into the furnace to fill the beach.