/Foundry
Foundry

Foundry

Gilsonite uses in Foundry:

Foundries have known for decades around the world. when put to the fire of molten iron, Gilsonite brings high performance to foundry sand. Gilsonite foundry additive for foundry sand preblends providing reduced smoke and emissions. Additive comprising a mixture of 1 part iron oxide, 1 part highly volatile carbonaceous material such as Gilsonite also 4 parts of metallurgical coke. This is 1/4 of foundry sand preblend. Other 3/4 consisting essentially of clays.
For complex, high value iron castings, Natural Bitumen performs like no other carbon additive. Also Gilsonite’s naturally superior properties mean high-quality castings with better finish and fewer defects.

 

Gilsonite (uintaite) is a natural hydrocarbon substance of the class known much as asphaltite.  Occurring as a coal-like solid which is mined rather like other minerals and sold essentially in its native state.

First of all the only commercially important deposits of gilsonite in the world are located in the west of Iran. From a point 6-8 km within Gilane Gharb, the area involved extends westward about 100 km into Ghasreshirin. Gilsonite occurs in veins varying in width from a few centimeters to 6 m. Elsewhere, minor gilsonite deposits have been reported in Khorramabad and Lorestan province.

Furthermore due to PUB-LTD`s geological work, Gilsonite was tremendous oil shale deposits, which is further confirmed by certain similarities in composition of hydrocarbons involved. Generally gilsonite and shale oil have a nitrogen content much higher than petroleum oils.

Classification

Gilsonite is classed as one of the asphaltites, especially are natural asphalt like substances, characterized by their high softening points (above 110°C). Also glance pitch and grahamite are other members of this group. Non-mineral constituents are also completely soluble in carbon disulfide. Finally we describe the Solubilities in aromatic solvents in ref.

Properties

The tests applied to gilsonite are in many cases almost the same as those used for asphalt.
Gilsonite is a natural mineral also is not a manufactured product, and is, therefore, subject to certain variations. We also treat The liquid distillate from the pyrolysis of solid gilsonite with sulfuric acid to produce a nonreactive hydrocarbon fraction which was classified as paraffinic . In addition  evidence for pyridines and quinolones in the distillate was apparently based on odor alone. In addition there are several hydrocarbon fractions from gilsonite distillate with many properties similar to those of fractions from crude petroleum.

We identify the Cycloparaffins (naphthenes) and olefins as hydrocarbon types. Furthermore several phenols, pyrroles, and pyridines have been isolated in the pyrolytic distillate from gilsonite .

We obtained a heavy yellow oil from undegraded gilsonite in yields of 4-8%. Several aromatic and nonaromatic cuts, the latter predominating, resulted from low pressure distillation also silica gel adsorption of the oil.

In addition we indicate the Substituted naphthalenes in the aromatic fractions by uv spectra. Destructive distillation of gilsonite gave 12 wt % gases, 55 wt % of a liquid pyrolyzate, and 33 wt % coke.

We also isolate Porphyrin fractions from ores of two different veins in yields of 0.03 and 0.004% (eg, deoxyphylloerythreoetioporphyrin). The entire porphyrin content is present as a nickel complex. The presence of porphyrins suggests that gilsonite is of plant origin.

Mining

Methods of mining especially includes the traditional hand pick, pneumatic picks, blasting, and high pressure (up to 13.8 MPa or 2000 psi) hydraulic cutting. We use All methods concurrently in different mines with the choice depending upon mine conditions, and elevating and surface handling requirements.

Table I. Properties of Gilsonite, Glance Pitch, and Grahamite

Softening Point, Ring and Ball Method, °C

Specific Gravity at 25°C

Mineral

Streak

Fixed Carbon*
Gilsonite or uintaite
Glance pitch or manjak*
grahamite**

Brown
Black
Black

1.03-1.10
1.10-1.15
1.15-1.20

132-190
132-190
188-329

10-20
20-35
35-55

* By proximate analysis, as for coal.
** When substantially free from mineral matter.