Calculated data
−0,0014578
−0,00128
2
12
Delta_h
-0.02633
Delta_t
0.81615
12120,7 kJ / kg
2894.9857 kcal / kg
12062,219kJ / kg
2881.011 kcal / kg
,kJ / kg
5796.80 kcal / kg
12058,593 kJ / kg
2880.145 kcal / kg
11730,135 kJ / kg
2801.69 kcal / kg
11725,60 kJ / kg
2800.61 kcal / kg
23601.88 kJ / kg
5637.21 kcal / kg
Manufacturing and determining mechanical properties of briquettes from solid
fuels with binders.
Briquetting - a physical-chemical process fuel thermomechanical transformation
fine, which gives a mechanically and thermally strong varietal product specific shape,
size and weight - a cake. Typically, the briquettes have a lot - 30-50 g
Coal briquetting binder made with or without it. Pressure pressing without the use
of binder must be more than 80 MPa. Obtained briquettes must have the necessary
strength and withstand various kinds of mechanical stress.
Formation of the cake is the result of consistently leaking densification and
strengthening of bulk material under the influence imposed pressure and weakening
the structure of the cake after the removal of pressure.
Equipment: Hydraulic press. Press shape with a diameter of 25 mm, weight
specifications. Laboratory ceramic cup, wire ring for mixing sample and binder. Muffle
furnace with controlled heating, baking coke backfill. Laboratory drum diameter of
300 mm with two shelves. A set of sieves (1010 mm, 11 mm) Pallet [9].
Conducting the test: To prepare the sample taken for briquetting fuel (typically
used anthracite coal or coke breeze) particle size5 mm and a binder (most commonly
used coal tar or coal tar pitch) .The technical scales weigh 18 grams of fuel that
previously has to be brought to air-dry state, and the material placed in a ceramic cup.
Sample cup with weight transferred to and add 2 g binder, which is 10% by weight.
The mixture is then thoroughly mixed wire ring (to improve mixing of the mixture
heated to a temperature80
o
C). Molds set under the press.
The mixture is poured into a press form on the surface of the mixture is placed
stamp. Drives a hydraulic press. Press gauge should show pressure of 100 kg / cm
2
.
Duration imposing pressure is 5 seconds. After removing the pressure of the issue cake
mold. Total thus receive two briquett. Briquett weighed on the scales and determine
the technical material out of the sample taken (in%). The heat treatment is obtained
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