Master student Alibek A.S., Candidate of Technical Sciences Kocherov Ye.N.,
Candidate of Technical Sciences, professor RAS Kolesnikov A. S.
South-Kazakhstan State
University names after M.Auezov,
Republic of Kazakhstan,
Shymkent city
PHYSICO-CHEMICAL AND MICROSCOPIC EXAMINATION OF THE MIXTURE OF PHOSPHATE
FINES FROM BROWN COAL
Currently, the production of phosphorus fertilizers
lack of raw materials of acceptable quality on the phosphorus content.
Traditionally known methods of processing of phosphate lead to the formation of
significant quantities of anthropogenic solid and liquid wastes containing
sulphates, chlorides, nitrates, etc., which often carry with them other toxic
and harmful impurities both in soluble and in insoluble forms. Another problem is
that widely used today phosphate fertilizers - superphosphates, mono
ammoniumphosphate other in the presence in the soil of alkaline neutralizing
agent are transformed into insoluble, unavailable to plants, tricalcium
phosphate and hydroxyapatite [1-3].
To date, conducted numerous and extensive testing in
agriculture of organic and humic fertilizer, obtained on the basis of brown
coal, peat and hydrolytic lignin, etc. the Results of these studies [4-6]
indicate a high efficiency of organic-mineral and humic fertilizers when you
make them for all major crops. Currently almost all of the humate containing
fertilizers in Kazakhstan are imported from foreign countries.
In the Republic of Kazakhstan reserves of brown coal,
suitable for the production of humic fertilizers are many. One of such fields
is Lenger coal-bearing basin in the South Kazakhstan region. Despite the
availability of sufficient deposits of coal are still not fully completed the
technology for processing them into humates.
In
this respect, the development of flexible and cost-effective production
technology of organic fertilizer based on humates from brown coal and low-grade
phosphate rock is an important task.
As
the main components of the organic fertilizers studied the following materials:
-
Phosphorite fines deposits of Zhanatas;
-
Internal overburden of brown coal deposits Lenger.
To confirm their theoretical prerequisites for
obtaining organic-mineral fertilizers produced samples of internal overburden
generated from mining of brown coals of the Lenger Deposit and phosphorite
fines deposits of Zhanatas.
During the course of experimental researches of
chemical and particle size analysis of withdrawn samples according to the main
components, the data are given in tables 1-2.
Table 1. Chemical and granulometric compositions of
trivia phosphorite deposits of Zhanatas
|
Field |
Classsize, mm |
Content, % |
|||||||||||
|
CaO |
MgO |
P2O5 |
CO2 |
SiO2 |
Fe2O3 |
Al2O3 |
F |
MnO |
Na2O |
K2O |
SO2 |
||
|
Zhanatas |
-0,5+0,147 |
36,5 |
4,40 |
21,2 |
8,90 |
17,3 |
0,53 |
0,24 |
1,8 |
2,3 |
0,2 |
0,4 |
0,4 |
|
-0,147+0,1 |
41,8 |
3,84 |
24,5 |
7,53 |
19,0 |
0,78 |
0,20 |
1,9 |
2,1 |
0,55 |
0,8 |
0,5 |
|
|
-0,1+0,08 |
34,4 |
3,78 |
21,3 |
6,34 |
16,3 |
1,23 |
2,76 |
1,8 |
2,4 |
0,4 |
0,65 |
0,3 |
|
|
-0,8 |
39,8 |
2,96 |
18,9 |
5,92 |
18,4 |
2,61 |
1,84 |
1,6 |
1,8 |
0,5 |
0,9 |
0,65 |
|
Table 2. Chemical and
granulometric compositions of the internal overburden of brown coal deposits
Lenger
|
Field |
Classsize, mm |
Content, % |
|||||||||
|
Cr2O3 |
Fe2O3 |
Al2O3 |
SiO2 |
CaO |
MnO |
Cсв. |
K2O |
Na2O |
SO2 |
||
|
Lenger |
-0,5+0,147 |
0,02 |
2,7 |
9,4 |
50,9 |
1,6 |
2,9 |
30,78 |
0,4 |
0,4 |
0,7 |
|
-0,147+0,1 |
0,07 |
3,6 |
9,1 |
49,2 |
0,7 |
2,3 |
33,38 |
0,3 |
0,5 |
0,6 |
|
|
-0,1+0,08 |
0,04 |
3,8 |
6,5 |
50,3 |
1,9 |
2,7 |
32,84 |
0,65 |
0,3 |
0,8 |
|
|
-0,8 |
0,12 |
2,9 |
9,4 |
51,8 |
2,1 |
1,6 |
29,82 |
0,7 |
0,47 |
0,87 |
|
Physico-chemical
studies of the microstructure of samples of phosphorite and internal overburden
of brown coal was carried out using scanning electron microscope JSM-6490l V
(Jeol, Japan), which was also determined by the elemental composition of raw
materials and products energy-dispersive method.
Theresultsofthesestudiesareshowninfigures 1-2.
|
|
||||||||||||||||||||||
|
|
Figure 1. Detail of
phosphate ore deposits of Zhanatas
|
|
||||||||||||||
|
|
Figure 2. Internal
overburden of brown coal deposits Lenger
The results of
chemical analysis of the obtained organic-mineral fertilizers are shown in
table 3. Results of microscopic researches of organic-mineral fertilizers and
elemental analysis presented in figure 3 and in table 4.
Table 3. The
chemical composition of organic fertilizer
|
Components |
Р2О5com |
Р2О5ass |
Р2О5wat |
Р2О5fr |
Humate К |
N |
Fe2O3 |
Al2O3 |
|
Content of components, % |
53,46 |
53,21 |
45,76 |
2,16 |
6 |
3,47 |
0,07 |
0,06 |
Figure 3. Microscopic
pictures of organic fertilizer
Table 4. The elemental
composition of organic fertilizer
|
Element |
Fe |
Mg |
Na |
Al |
Ca |
P |
S |
|
Content,% |
0,04 |
0,55 |
0,1 |
0,07 |
15,41 |
24,78 |
0,13 |
From table 4 it
follows that in the production of organic-mineral fertilizers the content of
magnesium, aluminum and iron does not exceed 0.1%, and thereby have a
significant negative impact on the quality of the target product.
References
1.
The
extraction of metals and inorganic compounds from waste: Ref.ed.Sittig M./Lane.
from English. Under the editorship of Emanuel N. M.M.: Metallurgy, 1985 page
2.
Organomineral
fertilizers on the basis ofphosphogypsum http://ecoportal.ru/.
3. Orlov D. S. Humic acid theory of humification of
the soil and General. M: Publishing house of Moscow state University. 1990.
Str.
4.
B. A.
Yagodin, Y. P. Zhukov, V. I., Kobzarenko agricultural chemistry/
edJagodina.-M.: Mir, 2004.
5.
www.humus.ru.
Akhmetov S. A., Aimetova B. A.
Inca, A. M., Menlibaev A. Kinetics of decomposition of low-quality phosphorites
of Karatau in the processing fosforecente cyclic way \\ the Science and
education of South Kazakhstan. -Shymkent, 2001., No. 23. -S. 35-38.