Start-up of 200,000 tons of hot-melt potassium equipment project

Recently, the country's first sets of 200,000 tons of potassium hot melt equipment project in Golmud City, Qinghai Tibetan grid Potash Co.
, success of a car
.
The project uses potash, carnallite, and various potassium-containing tailings as raw materials to produce 98% high-purity potassium chloride, which can effectively alleviate the shortage of potassium resources in China
.
This project is a "turnkey project" for R&D, design, manufacturing and installation of Jiangsu Xinhongda Group Co.
, Ltd.
Its hot-melt-cold crystallization technology has filled the domestic gap
.
? Crystallization is the biggest technical difficulty of the hot potassium project
.
The technicians of Xinhongda produce high-purity potassium chloride through multi-stage crystallization, which is only a few micrometers at first.
Through the specially designed crystallizer, the crystal grains gradually grow up, and then reach the product particle size that meets the process requirements
.
This crystallization method has been granted a patent for invention
.
According to relevant experts, the multi-stage crystallizer has broken through the five major technical bottlenecks: First, it has realized the design from theory to industrialization.
Xinhongda organized a team of experts, from heat balance, water balance and material balance calculations to laboratory test and pilot test.
To the industrialization test, the difficulties were overcome step by step, after hundreds of structural improvements, the industrial design was finally realized; second, the special design embodied in the structure, the technicians used imported fluid simulation software to carry out thousands of simulations In the experiment, the trajectory of the liquid-solid two-phase movement inside the crystallizer and the distribution of the crystal particle flow field are calculated; third, the special design embodied in the stirring, the use of a large-displacement axial flow impeller to achieve solid-liquid suspension and realize heat transfer , The purpose of crystallization, while not destroying the crystalline particles; Fourth, it is reflected in the special design of replacing the mechanical seal, which can quickly replace the mechanical seal without dismantling the stirring device and without discharging; Fifth, the specially designed double-end mechanical seal , To ensure that the related equipment does not leak, and extend the service life
.
? It is understood that China's potassium resources are mainly concentrated in the salt land of sea lakes in Xinjiang and Qinghai, and most of the potassium chloride production and processing enterprises are also concentrated in this area
.
For a long time, due to the bottleneck of extraction technology, most of the production enterprises in our country use potash salt and carnallite with high potassium content to extract potassium chloride, and discard the leftovers after production as waste
.
In September 2016, with the support of Xinhongda's technical equipment, Zangge Potash Fertilizer Co.
, Ltd.
invested 140 million yuan to launch the country’s first 200,000-ton hot-melt potassium project
.