Study On Preparation Of Soil Conditioner By Using Potassium Minerals

There is abundant resource of refractory potash mine domestic,among them,the potassium-rich?K-rich?slate of Bayan Obo Mining District is stockpiled as waste in Inner Mongolia,and the content of potassium was 8%-16.9%.Previous study shown that the conservative reserves of K-rich slate in the whole mining area reached 1.674billion tons,increasing at a rate of 3 to 4 million tons per year,which has great utilization value.Although the Bayan Obo K-rich slate is rich in mineral resources,due to the perennial accumulation of K-rich slate,the traditional process has the disadvantages of high energy consumption,low utilization rate of raw materials and large environmental pollution and so on.The microbial metallurgy technology that has emerged in recent years has taken advantage of the strong adaptability of microorganisms,rapid reproduction,high utilization rate of raw materials,low energy consumption,and low pollution,so as to provide new technology directions for the use of Bayan Obo K-rich slate.The resource utilization of K-rich slate in Bayan Obo and the different waste biomass energy are studied by the solid-fermented technique.The potassium-rich slate ore is semi-self-shaped,granular,columnar,and banded,mainly containing potassium feldspar,pyrrhotite,sodium amphibole and aegirine.Potassium,calcium,magnesium and silicon are available as elements in the ore.The mass fractions are 12.45%,2.25%,2.10%and 51.49%respectively.Chemical potassium phase and mineral composition analysis showed that potassium in potassium-rich slate mainly occurred in potassium feldspar.The fineness of the potassium-rich slate grinding should be below 0.075 mm to dissociate well.By analyzing the physical and chemical indicators of each pile and the biological indicators,it is known that each pile has been decomposed and has not exceeded the national heavy metal limit standard.The organic matter content of the six fermenters was 36.00%,19.97%,16.64%,21.89%,20.86%,and 16.68%,respectively.The available potassium?K₂O?content was 4.87%,5.48%,6.31%,4.77%,5.13%,5.28%,respectively.Six piles are weakly alkaline.The effective viable counts of the six piles meet the standard requirements.The microbial diversity and abundance of each heap increased with time,and 8 bacterial gates were detected in all samples.Solid fermentation treatment involves a variety of bacterial communities,and the bacterial community is constantly changing in the later stages.After fermentation,the structure of the mineral surface changes,and the minerals are blurred from irregular edges and corners,and the crystal structure is destroyed.By verifying the effect of soil conditioner,the yield of maize plants of 1+J,2+J and 3+J increased by about 79.69%,32.81%and 89.72%,respectively,compared with the control group.The organic matter of 1+JT and 2+JT increased by 0.57%and0.14%,respectively.The pH of 1+JT,2+JT and 3+JT decreased by 0.39,0.5 and 0.49,respectively.After 1+J,2+J,and 3+J were applied to the soil,the available potassium content in the soil increased by 0.82 times,1.68 times,and 1.49 times.The application of three compost and single application liquid in the soil can effectively promote the growth of corn,and can effectively improve soil nutrients.