Advantages of special steel balls for grinding mill

Introduction: Run-type grinding mill for the iron ore is the main supporting equipment in the mill grinding process in the shaft furnace pellet production process. The reason for this is that it can process materials with a moisture content of 7-9%. Generally, if the particle size of the iron-containing raw material is coarser in the pellet production process, it is necessary to consider increasing the wet-grinding process after the drying and mixing in order to improve the blast furnace index. The mill can effectively reduce the amount of bentonite added, improve the strength of the green ball, the output of uniform particle size, low powder, high grade, stable quality pellets.

The mill has three major characteristics: forced feeding, rubber lining, and surrounding ore discharge.

In view of the special working principle of the wet grinding mill, it also has strict requirements on the steel balls of the mill. Compared to ordinary high-chromium and forged steel balls, the special steel balls for the grinding mill produced by the Tianhao Wear-resisting Material Factory of Bengbu City are apparent. It is more suitable for the production of iron ore fines from steel mills.

Mill mill high-quality steel ball specific advantages:

(1) The mechanical properties of the mill's steel ball: It should have relatively high compressive, tensile, flexural, shear, and tear strength, and adequate hardness and toughness.

Grinding machine special steel ball, external strong internal toughness, more grinding harder (work hardening ability) steel ball impact fatigue test more than 25000 times, impact toughness value> 12J/cm2 can be applied to large and medium-sized ball breaking grinding, grinding and rotating speed Fast and heavy industrial and mining conditions.

(2) The physical properties of the mill ball: high thermal conductivity, low coefficient of thermal expansion and good thermal stability over a range of temperatures and pressures.

The special steel ball of the mill mill, after special quenching treatment, changes the body organization, and the wear rate is 40-50% lower than that of the low chromium steel ball in the same industrial and mining conditions, and it has good thermal stability.

(3) The physical-chemical properties of the mill ball: high content of alloying elements and uniform distribution, good corrosion resistance, good hardenability and processability.

The special steel ball for the grinding mill is made of bainitic ductile iron ductile iron. The alloy is reasonably matched to the chemical composition (by adding molybdenum, boron, nickel and other alloying elements). After two times of modification, the structure is evenly distributed and the wear resistance is strong. And it has good corrosion resistance to strong acid and alkali abrasives.

(4) The mill ball must have a good wear resistance composition, that is, highly dispersed reinforcing phases such as carbides and nitrides.

Special steel balls for grinding mills contain high amounts of C and Si. After special processing, they achieve reasonable toughness matching, extremely low crushing rate, and no loss of roundness. They have the effect of energy saving, production increase, and power consumption reduction.

Source: Handan Tianhao Wear Resistant Material Factory