Nodulizing

nodulizing

[′näj·ə‚līz·iŋ]
(engineering)
Creation of spherical lumps from powders by working them together, coalescing them with binders, drying fluid-solid mixtures, heating, or chemical reaction.

Nodulizing

 

the process of consolidating ore fines and concentrates for smelting by sintering, pelletization, or briquetting. Nodulizing improves the metallurgic properties of the ore by altering the chemical composition: it removes harmful impurities, such as sulfur and volatile gases, and increases reducibility. As a result of nodulizing, mechanical strength is increased, and the ore acquires a porous structure.

In 1973 in the USSR and other industrially developed countries, over 95 percent of iron ore that was smelted in blast furnaces was nodulized, primarily as agglomerates and pellets.

References in periodicals archive ?
Tenders are invited for Upkeep Of Sinter Machine, Sinter Breaker, Sinter Cooler, Mixing & Nodulizing Drum, Double Roll Crushers And Sinter Screens And Repair/Replacement Of Chain Conveyors.
the charges 1 and 2 were treated with greater quantities (identical for the two charges) of nodulizing modifier, FeSiMgCe(RE) and with same amount of graphitizing modifiers, but different from the chemical composition point of view: FeSi--charge 1 and FeSiSr--charge2;
the charges 3 and 4 were treated with smaller quantities (identical for two charges) of nodulizing modifier, FeSiMgCe(RE) and with the same amount of graphitizing modifier (as for charges 1 and 2): FeSi - charge 3 and FeSiSr charge 4.
This shape analysis of compact graphite separations of modified cast irons, can show us that the use of the nodulizing modifier FeSiMgCe(RE) in a greater concentration (1.
The use of the same type of modifying nodulizing substance in a lower concentration (0.
Great for new employees or anyone wanting a basic introduction to ductile iron metallurgy, this course covers the following topics: the members of the cast iron family; comparisons of the cast iron family; the specifications of the cast iron family; the chemistry of the cast iron family; inoculants used to create ductile iron; production problems; changes in properties when production problems occur; the microstructure of ductile iron; the alloy content of ductile iron; treatment methods; physical limitations; nodulizing problems; process control.
In order to obtain the compacted graphite we used two modification technological variants regarding the type of nodulizing (compacting) modifiers used.
Thus, the following nodulizing (compacting) modifiers were used:
Higher values of the yield strength were obtained in the CGI, obtained through modification by the compacting of the graphite separations with a slightly greater supplement of the FeSiMgCe(RE), charge 1, compared to charge 2, where we used (keeping in mind the explanations already presented) a less higher supplement of graphite modifier (FeSiSr); lower yields strength resulted for the CGI, charge 3, obtained through a nodulizing modification with FeSiMgCaCe(RE) and through a graphite modification with a lower supplement of FeSiSr, compared to charge 4.
The Effect of Minimizing Rare Earth Elements During Nodulizing Treatments and the Inoculation of Ductile Iron (14-004)
The effects of the nodulizing treatment of a base iron with magnesium and rare earth elements fade over a relatively short time.
Excessive holding may cause temperature losses, chemistry changes and fading of inoculation and nodulizing effects.