Slag Grinding Mining And Processing Solution2021-06-15

What Is Slag

Slag is an industrial waste removed from the ironmaking process. In the blast furnace ironmaking process, in addition to iron ore and fuel, in order to reduce the smelting temperature, an appropriate amount of limestone must be added as a co-solvent, which is obtained by decomposition in the blast furnace Calcium oxide, magnesium oxide and waste ore in iron ore, as well as the ash in coke dissolve to form a melt with silicate and aluminosilicate as the main components, which floats on the surface of the molten iron and is regularly discharged from the slag discharge port After air or water quenching treatment, granular particles are formed, which is granulated blast furnace slag, referred to as "slag". Slag is a material with "potential hydraulicity", that is, it is basically non-hydraulic when it exists alone, but it exhibits hydraulicity under the action of certain activators (lime, clinker powder, alkalis, gypsum, etc.).

Use Of Slag

1. As a raw material to produce Portland slag cement, granulated blast furnace slag is mixed with Portland cement clinker, and 3~5% gypsum is added to mix and ground to make Portland slag cement, which can be better used in water projects. , Seaport and underground engineering, etc.
2.It can be used to produce slag bricks and wet-rolled slag concrete products.
3. Put the water slag and activator (cement, lime and gypsum) on the wheel mill and add water to grind to make mortar, then mix with coarse aggregate to form wet-rolled slag concrete.
4. The slag crushed stone concrete can be prepared, and it has a wide range of applications in road engineering and railway engineering.
5. Application of expanded slag and expanded beads Expanded slag is mainly used as lightweight aggregate to make lightweight concrete.

Slag Powder Production Process

The main blast furnace slag raw material composition analysis table (%)

Species	CaO	SiO₂	Fe₂O₃	MgO	MnO	Fe₂O₃	S	TiO₂	V₂O₅
Steelmaking, casting blast furnace slag	32-49	32-41	6-17	2-13	0.1-4	0.2-4	0.2-2	-	-
Ferromanganese Slag	25-47	21-37	7-23	1-9	3-24	0.1-1.7	0.2-2	-	-
Vanadium iron slag	20-31	19-32	13-17	7-9	0.3-1.2	0.2-1.9	0.2-1	6-25	0.06-1

Mill recommendation

Coarse powder( 30-400 mesh)	Fine powder (600-2000 mesh)
Vertical mill or Raymond mill	Super fine mill

Remarks: Choose different types of hosts according to the output and fineness requirements.

The First Stage: The Crushing Of Raw Materials

The large bauxite material is crushed by the crusher to the fineness (15mm-50mm) that can enter the mill.

The Second Stage: Milling

The crushed bauxite pieces are sent to the storage hopper by the elevator, and then sent to the grinding chamber of the mill evenly and quantitatively by the feeder for grinding.

The Third Stage: Classification

The ground material is classified by the classification system, and the unqualified powder is classified by the classifier and returned to the main engine for re-grinding.

The Fourth Stage: The Collection Of Finished Products

The powder that meets the fineness is separated and collected in the dust collector through the pipeline through the airflow. The collected finished powder is sent to the finished product silo by the conveying device through the discharge port, and then is packaged by a powder tanker or an automatic baler.