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Rare earth mine need soil remediation

Details: Category: Rare Earth News; Published on Friday, 11 April 2014 17:27; Written by HJF; Hits: 1649

Rare is called "industrial vitamins' extensive use in military, electronics and other industries, is an important strategic mineral resources. As the rare earth mining operation is simple, low cost, resulting in excessive exploitation of rare earth enterprises, indiscriminate deforestation seriously, with backward production technology, inadequate facilities and lack of environmental management and ecological restoration of environmental protection facilities, water and soil caused a very major environmental pollution.

During the extraction of rare earths, rare earth on the one hand the formation of sulfuric acid and ammonium hydroxide in the soil, and then after precipitation of oxalic acid or ammonium bicarbonate, ammonium bicarbonate or rare earth oxalate into a rare earth, which is substantially completed from mining to Take mine the whole process is left in the soil sulfate and ammonium ion - the main component of fertilizer, but if the concentration is too high, the plant's roots will be burned. On the other hand, the remaining tailings still contain many heavy metals, along with erosion into surface and groundwater, seriously affecting the drinking water sources of local residents and agricultural irrigation water.

According to the environmental protection department estimates, the rare earth industry each year produces tailings amounted to thousands of tons of pollutants which have exceeded ten times the national emission standards.

According to the topography factor contaminated areas (ground slope, soil thickness, soil material composition, irrigation), soil physical properties (density, dispersion coefficient, the initial infiltration rate, porosity), soil chemical properties (pH, water-soluble calcium content, NPK content), biological factors (activity, total microbial respiration) and other indicators to determine the main limiting factor affecting soil remediation and restoration of vegetation in the area. Combined with local climatic conditions and domestic and foreign soil remediation of pollution control technology and other relevant information to determine the content of the works and the general idea.

First, select Survey conducted soil pollution monitoring, and land formation on the basis of the monitoring results of the investigation on the one hand, to select a different method of heavy metal enrichment plant species and soil heavy metal pollution control to carry out the work, on the other hand to select different soil remediation agents Governance restoration of contaminated soils. Implementation steps are divided into: the status of soil survey, soil sampling and analysis, soil environmental assessment, restoration design, restoration program implementation.

In recent years, concerns about soil pollution prevention rare earth mine continues to heat up, some of the first real efforts have been made to the region. National ministries are actively filling policy gaps, technology, policies and regulations, a number of pollution prevention and control, is expected to be introduced in the near future. We can say that the rare earth mine soil remediation will face challenges and better opportunities for development.

Rare Earth Supplier: Chinatungsten Online - http://www.chinatungsten.com
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In the first quarter of rare earth exports up by 83.2%

Details: Category: Rare Earth News; Published on Friday, 11 April 2014 17:22; Written by HJF; Hits: 1602

According to Chinese Customs surveillance, in March 2014 China exported 2,671 tons of rare earth, the amount of 219.79 million yuan. Statistics from January to March 2014, China's exports of rare earth 7,174 tons, an increase of 83.2%; the amount of 584.16 million yuan, down 0.1%.

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April 11, 2014 Market Price of Rare Earth

Details: Category: Rare Earth News; Published on Friday, 11 April 2014 17:10; Written by HJF; Hits: 1594

This rare earth market continues steady , despite purchasing and storage support, but deserted market inquiry , demand for light , volume is still no improvement , according to the situation of rare earth outlook uncertain , market supply and demand both wait and see.

Dysprosium oxide mainstream manufacturers tax 165-175 yuan / ton, dysprosium iron mainstream manufacturers tax price 170-180 yuan / ton.

Praseodymium oxide mainstream manufacturers tax price 570,000-580,000 yuan / ton. Neodymium oxide 315,000-325,000 yuan / ton.

Lanthanum oxide manufacturers tax price 21,000-22,000 yuan / ton. Cerium oxide mainstream manufacturers tax price 21,000-22,000 yuan / ton.

Neodymium oxide, praseodymium mainstream manufacturers tax price 315,000-325,000 yuan / ton , praseodymium , neodymium metal mainstream manufacturers tax price 410,000-420,000 yuan / ton.

Fluorescent europium oxide mainstream manufacturers tax price 4,000-4,200 yuan / kg. Terbium oxide phosphor grade mainstream manufacturers tax price 3,000-3,200 yuan / kg.

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Brazil Sierra Verdi mineral exploration company started mining low-grade heavy rare earth

Details: Category: Rare Earth News; Published on Friday, 11 April 2014 17:15; Written by HJF; Hits: 892

According to reports, the Brazilian mining company in Sierra Verdi in the middle of working on the development of its low-grade heavy rare earth mine in Brazil , the project plans to start in 2017 .

Brazilian mining company 's parent Sierra Verdi Brazilian mining company CEO Sprecher said recently ,2008- 2009 global economic downturn and the introduction of China cuts rare earth export quota policy to make the world into a so-called & ldquo in the interview ; rare earth crisis " panic , which have launched a number of rare earth development projects. However, due to oversupply in the market , very few of these projects have substantial progress in terms of production, the current supply of rare earth materials West is still largely dependent on Chinese production . Macroeconomic environment and a good incentive to heavy rare earth supply gap is growing outside of China , the company's heavy rare earths project or the West will become a guarantee of long-term sources of supply of heavy rare earths , stable and sustainable flagship project .

He said , "We have ionic rare earth mining project in southern China with a number of ion ore mined similar advantages , mining, processing technology is simple , easy operation, low capital intensive degree , so regardless of China 's rare earth exports happen in the future changes in our product in the rare earth market could remain relatively stable prices . According to industry experts predict that by grade resources decline , rising costs of more stringent environmental regulations as a result of regulation , to combat the black market and the impact of factors such as increased domestic demand , China will soon become a net importer of heavy rare earth elements . "

Sprecher believes that Brazil can use a simple rare earth ore trucks - shovel open pit mining methods , using a solvent of low-cost production of rare earth concentrates, and therefore lower production costs ; Meanwhile , water, electricity and transportation and other supporting infrastructure near the project site . The combination of these favorable factors , coupled with the increased demand for rare earths , the project has the potential to challenge China in the future dominant position in the supply of heavy rare earth materials .

Canadian National Mineral Resource estimate based on rating agencies to cut-off grade of rare earth oxide 0.10% (REO) estimates that the project's resource of 4.12 million tonnes at 0.16% ; includes cut-off grade of zero if the place , the total amount of resources 931 million tons at a grade of 0.12%.

Sprecher said, compared with hard rock mining, the project may be low grade , but low mining costs , simple and tight separation of heavy rare earth distribution can compensate for their low-grade high disadvantage .

It is reported that the company plans to produce the first batch of mixed rare earth concentrates in 2017. 2019 , the year of rare earth separation capacity of 5,000 tons in 2024 to expand to 10,000 tons / year.

The project feasibility study is currently underway in the mining and wet pilot production is expected to complete the feasibility study in the second quarter of this year. Bank feasibility analysis completed by 2015

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Eurasian Economic Commission to reduce import tariffs on rare earth metals

Details: Category: Rare Earth News; Published on Friday, 11 April 2014 17:06; Written by HJF; Hits: 1562

Eurasian Economic Commission website on April 8 hearing, the Eurasian Economic Commission recently made a decision to rare earth metals, scandium and yttrium, and whether or not intermixed or mutual fusion (Zollverein commodity code 2805301000,2805309000) reduced from 5% to zero. Implementation period of May 1, 2014 to April 30, 2015.

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