No worries after the development of domestic solid mining foundation and deep potash salt

Statistics show that the world has proven reserves of 9.
5 billion tons of potassium resources, which are mainly distributed in 15 countries including North America, Europe, the Middle East and Asia, Thailand and Laos.
In terms of resource types, underground solid potassium resources occupy the absolute majority.
In recent years, a large number of domestic companies have invested in overseas development.
Zhongliao Mining, Kaiyuan Group, China Hydropower Mining, Zhongnong Mineral Resources Exploration Co.
, Ltd.
, and China-Kazakh Fortis have established potash mining projects in Thailand, Laos, and Kazakhstan.
Different from the development of domestic salt lakes, overseas potash usually requires solid mining and underground brine mining, which poses new challenges to the development technology and equipment technology of "going out" companies.
Thanks to the accumulation of strong technical experience in the development of coal and metal mining by domestic machinery and equipment companies, a series of continuous mining machines and roadheaders that conform to the characteristics of solid potash ore have come out, becoming a solid backing for Chinese potash workers to go overseas to find potassium.
Solid potash ore has mining problems.
Potash ore can be divided into solid phase deposits and liquid phase deposits according to different genesis.
In the world, the mining of potash resources is mainly divided into three methods: solid mining, underground brine mining, and modern salt lake mining.
Zhou Maopu, deputy chief engineer of Taiyuan Research Institute Co.
, Ltd.
of China Coal Science and Industry Group, said: “The mining of solid deposits is mainly divided into dry mining (underground mining and open-pit mining) and water mining (chamber water solution method and drilling water solution method).
" It is understood that dry mining has basically the same development methods for various salt deposits.
At present, the traditional room and pillar method of shaft development is widely adopted abroad.
The shaft has strong adaptability to various salt deposits, and is especially suitable for ore bodies with high grades and buried depths of less than 1000m and mines with large production capacity.
The chamber water solution method is used in special situations where there is a lot of sediment and low grade.
The drilling water solution method is to install a pipeline in a borehole up to 2000m deep, communicate with the underground ore body, and inject fresh water into the ground through a water injection pipe.
Eroding the ore body, creating an artificial cavity sufficient to hold the dissolved salt solution, the obtained solution is pumped to the ground through a pipeline, and then artificial or natural evaporation is concentrated, and the product is crystallized and separated.
Zhou Maopu believes that the traditional solid potash mining method is backward, the degree of mechanization is not high, and the resource recovery rate is low, which seriously restricts the production of potash fertilizer and the development of the industry.
When mining, there are problems such as low mechanization, unreasonable mining technology, and irregular equipment operation and management.
He gave an example: “Solid mining is divided into dry mining and water mining.
If the judgment is wrong, the loss will be difficult to make up.
Some of our companies have built a complete set of water mining equipment in Laos, but they are useless for a day in the well.
The new dry mining equipment cannot be put in place either.
In this case, one is the failure of the preliminary verification, and the other is that the later redesign does not match the equipment manufacturer's ability.
If mining mining is handed over to laymen, the risk is great.
"Domestic experts Jingyan potash mine development, once a coal mining expert, has now focused on solid potash mining research for 8 years.
In Zhou Maopu's view, domestic potash mining has insufficient technical products, insufficient equipment, insufficient management and insufficient production capacity.
Especially in the field of solid potash mining, there has been a long-term technological gap in China.
Zhou Maopu said frankly: “In the process of researching mining technology and equipment, if we don’t take the initiative to learn from foreign countries, our work will be difficult to carry out.
After a series of visits and observations, we have combined our own advantages on the basis of foreign companies’ technology development and achieved Many innovative achievements.
Among them, the successful application of continuous mining machines and roadheaders in solid potash mining has laid a technical and equipment foundation for solid potash mining.
The application of new technologies, new processes and new equipment for solid potash mining A new approach has been opened up.
” Zhou Maopu said: “Canada’s largest mine reserves reached 2.
8 million tons.
During the exchange process, foreign technical personnel introduced that their recovery rate reached 45%, and the profit rate was 75%.
This surprised me very much.
Work.
For the first time in 30 years, I heard that there is such a high profit margin.
After a complete tour of the production process, I did not ask questions, which surprised the other party.
Why? Because our past mining and potash solid mining are separated One door, open the door, we can get through.
The final result of the discussion is that if we combine our domestic technology, the recovery rate of this mine can increase by 5 percentage points, and the profit rate can increase by 10 points, which means that the productivity exceeds 50%.
, The profit can reach 80%.
" Regarding the study of solid potash mining, Zhou Maopu raised several issues that require concentration and key breakthroughs.
He said: "The potash mining in some projects does not match the total output of the mine.
It is necessary to change the mine production mode, explore new mining methods, increase resource recovery, and increase the adaptability of mining machines to the geological conditions of the potash mine.
Passed Practically explore how the short-wall mining system of the mining machine and the mine production system are connected and coordinated, and how the short-wall mining and filling methods are matched to effectively realize green mining.
In addition, the design of potash mines should meet the requirements of new equipment, new processes, and new materials.
In terms of equipment research and development, manufacturing equipment with anti-corrosion performance adapted to potash mines.
” Leading equipment companies are strongly involved in the field of large-scale coal machinery comprehensive equipment manufacturing at home and abroad, and the Chinese brand of Sany Heavy Equipment has become a household name.
In the Laos Zhongnong Mining Industry Potash Project, we were also pleasantly surprised to see the figure of Sany Heavy Equipment.
Sany Heavy Equipment is the second listed company of Sany Group.
It was established in 2004 and mainly engaged in the production of coal mine auxiliary machinery.
In 2005, it was listed in Hong Kong.
In the development of potash equipment, Niu Jianqiang, deputy general manager of Sany Heavy Industry Equipment Co.
, Ltd.
Engineering Excavation and Mining Equipment Company, said: "In terms of business, we have cooperated with all major mining bureaus and have mature production technology in coal mining.
.
In 2011, we cooperated with Zhongnong Mining Company for the first time.
Zhongnong purchased one of our coal mining equipment after investing in the potash mine.
After the on-site use, the effect was very good.
The monthly footage was about 300 meters, reaching their level.
Request.
Subsequent purchase contracts have been signed many times.
In 2014, in order to ensure production capacity, Zhongnong Minerals proposed that we develop a high-performance mining equipment.
Our newly developed equipment adopts a protective mining technology with a mining height of 8.
5 meters and a width of 10 meters, the area of ​​a mining fracture reached 80 square meters.
This set of equipment has been used in 2014, and now the average daily production capacity can reach 2,000 tons of salt mines.
" Regarding future cooperation with potash development companies, Niu Jianqiang said "In the field of mineral development, the degree of mechanization of coal mining is very high; in the field of solid potash development, we hope that there will be more concentrated mining needs, and we can provide corresponding technical support in terms of equipment.
In addition, corresponding to the equipment We have rich experience in supporting, investment, use and maintenance costs of the company, and we can provide corresponding services for overseas potash companies.
" 5 meters, the width reaches 10 meters, and the area of ​​one-time mining fracture reaches 80 square meters.
This set of equipment has been used in 2014, and now the average daily production capacity can reach 2,000 tons of salt mines.
"For the future cooperation with potash development companies, Niu Jianqiang said: "In the field of mineral development, the degree of mechanization of coal mining is very high; in the field of solid potash development, we hope that there will be more concentrated mining needs.
Can provide corresponding technical support in terms of equipment.
In addition, we have relatively rich experience in the matching, investment, use and maintenance costs of the corresponding equipment, and we can provide corresponding services for overseas companies looking for potassium.
"