Shanxi black is also called Emperor black, Taibai and Hui Lvyan. It
is a black granite. This type of ore belongs to magmatic rocks. The
gabbro is dark black, mainly composed of plagioclase and pyroxene,
with fine crystalline structure, massive structure and pure black.
Shanxi black is not the granite so called China black, China
black(fengzhen black) looks dark blue and dotted some spot on the
surface, polishing effect not as good as Shanxi black. Shaxi black
is the hardest granite in China so far, it is very shinning after
The gloss of stone has theoretical gloss, polished gloss and actual
polished gloss. In principle, theoretical gloss can be obtained
through calculation of the absorption, reflection, and refraction
of light by minerals. The polished lustre is calculated from the
calculation of the factors that affect the gloss of stone, such as
the weathering of the stone, the density of the structure, the
color change, the fragmentation of the mica and the disintegration
of the mica, and so on, and the actual polishing gloss is through
the actual operation. The glossiness is obtained. Besides the
natural factors of stone, it can be said that human factors are
very large. Such as the method of construction grinding, the result
of the construction grinding, the drying degree of the stone
recrystallization hardening plate, the environment temperature of
the stone recrystallization hardening, the method of hardening the
stone recrystallization and the choice of the crystallization
hardening agent and so on. The existence of all these uncertain
factors will affect the results of recrystallization hardening to
From the mineral structure of stone, the grain size will affect the
gloss of the stone. The larger the size of the crystal particles,
the lower the glossiness, the worse the polishing performance. The
more homogeneous the crystal grain is, the better the polishing
performance is. The difference of gloss in different measurement
directions of stone polishing surface is also existing, that is,
the gloss is directional, and the consistency of the different
directions of the polishing surface of the medium and fine grain
stone is better, and the difference in the different directions is
reduced with the polish of the polishing surface of the stone.
In practice, the medium and fine grained stone is faster than
coarse grained stone in grinding and recrystallization hardening.
According to the size of mineral granularity, the rock structure
can be divided into five kinds: macro crystal (particle >10mm),
coarse grain (particle >5mm), grain (particle 5 - 2mm), fine
grain (particle <0.2mm), and granular <0.01mm (particle
The higher the hardness, the slower the speed of stone grinding and
stone re hardening. The slower we call the speed, we should
understand from two aspects: 1. the higher the number of abrasives
for stone grinding, the more times the stone recrystallization
hardened; 2. in the actual operation, the speed of the machine we
master is slow. In practice, everyone may have such a feeling, the
ordinary marble grinding to 1000 orders can be polished, and Shanxi
black stone to be ground to 2000 - 3000 orders. All of this is
theoretically determined by the time when the stone will finish the
plastic flow. Experiments prove that marble will produce plastic
rheology at the beginning of the 150 mesh, while the high hardness
Shanxi black stone will not.
The hardness of stone is the main factor that determines the speed
of stone grinding and stone recrystallization hardening. The
hardness of Shanxi black stone depends on the mineral hardness of
the stone, and is influenced by the structure and structure of the
stone. The hardness of Shanxi black stone is as high as 8 Mohs, so
the grinding and recrystallization hardening speed of Shanxi black
stone is slower than that of marble, limestone and slate.
The effect of recrystallization hardening of Shanxi black stone
with larger volume is better. When the density of stone is more
than 2.65g/cm3, the polishing effect of stone is very good,
otherwise, stone with small density and has less effect.
|Granite type||black granite tiles|
1. Dimensions: 300 x 300mm 300 x 600mm 400 x 400mm 600 x 600mm
800*800mm or other specified specifications
2. Dimensional tolerance: quadrilateral 10mm diagonal + 10mm
3. Thickness: 18mm 20mm 25mm 30mm 50mm 80mm 100mm 150mm and other
4. Quality control: 1). Thickness tolerance: + 0.5mm + 1mm + 1.5mm
2). Color: for the same ore export blocks, the same color plate
3). Plate surface: no defects, such as black gallbladder, crack,
ray, yin and Yang, stain, angle and so on.
4). Processing: the horizontal section is smooth and straight,
without burr, disintegration and angle missing angle and so on.
1. Dimensions: 60 heads, 70 heads, 80 heads, 90 heads and other
2. Quality control: width: 60 headboard selection more than 63cm,
70 headboard selection 73cm above, this analogy.
3. Color: the same ore mouth, uniform color.
4. Plate surface: flat pattern, color consistent, no black bile,
cracks, rays, yin and Yang, pit and other obvious defects.
5. Flatness: the flatness of the plate is not more than 0.5mm
6. glossiness: a polished mask has a mirror gloss that can clearly
reflect the scene, with a glossiness of not less than 80
Black granite detail