Environmental Policy and Brexit Affected Tungsten Market
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- Category: Tungsten's News
- Published on Monday, 04 July 2016 19:08
- Written by yiping
- Hits: 525
In late June, Chinese announced the "National Catalogue of Hazardous Wastes" 2016 edition. The catalogue noted the tungsten slag which produced for ammonium paratungstate alkaline decomposition process and molybdenum slag which produced form molybdenum removal process and waste water are included in the non-ferrous metal smelting waste, belong to toxic smelting waste. But other tungsten products smelting slag has not yet been included in the catalogue.
In June 29, 2016, Ganzhou Tungsten Industry Association held a meeting with APT smelting enterprises directors. This meeting fully analyzed the impact of this environmental policy on APT smelting enterprises and discussed the appropriate response options. This environmental policy will begin on August 1 and for APT smelting enterprises still have one month grace period. The relevant manufacturers can find a way to solve the difficulties and problems. It is said environmental policy will not great influence on the smelting factory, mainly because tungsten market is now at a low season, having low operating rates, so the prices continued to slight decline and tungsten raw material and tungsten finished manufacturers enthusiasm is not high.
Brexit resulting pound continues to fall, the euro against the dollar also fell more than three percent, while the swiss franc and the Japanese yen has been skyrocketing. Brexit direct affects the global currency market. In order to stabilize the economy, many countries have begun to currency intervention. Europe As a cross-border export electricity supplier important market, is now in the economy shocks and the pound and the euro will likely continued to depreciate, which to some extent, in favor of tungsten market import, such as imports of tungsten related equipment. But in this economic situation will reduce the profits of business, which is not conducive to exports. The official pointed out, the current China logistics companies which employ cross-border e-commence in EU usually through the UK into the EU, therefore the British leaved form Europe have a certain impact on China-EU cross-border logistics service providers. Brexit will make the global economy in long grace period, so countries should make corresponding measures to stabilize their economies.
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Coal Market Warmed in June, Tungsten Trioxide Denitration Catalyst Assists Ultra Low Emission
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- Category: Tungsten's News
- Published on Monday, 04 July 2016 17:35
- Written by chunyan
- Hits: 642
This year, both the coal supply and demand maintained low, because of the coal mine production by the upstream, downstream and macroeconomic impact of limited production, energy conservation and other factors,. The first half of June, south of China is in a time of the rainy season, residents used the less amount of electricity, plus the power transmission from west to East increased and the abundant hydropower and other factors, the number of shipping of the coal plants have been suppressed. However, as temperature rise, the stuffy weather come into being, the loading of air-conditioning cooling has been increased, the public electricity surge, and also brought an increase in the amount of coal. June, coal prices rose slightly by 10 yuan (RMB)/ton, the media reported, in July, the coal prices will rise by 10~15 yuan (RMB)/ ton.
With the increase of the amount of coal, it will inevitably lead to the increase in the number of coal-fired of the coal companies, under the situation of “Ultra-Low Emission”, coal plants are supposed to have a better treatment for the coal fired exhaust gas, to install or improve the exhaust gas desulfurization and denitration process. Ultra-low emissions generally refers specifically to coal-fired boilers in thermal power plants using a variety of contaminant removal effective coordination system integration technology in the process of generating electricity, the ending treatment and other processes, thus to make the emission concentration of dust, sulfur dioxide, nitrogen oxides, etc. are in compliance with emission requirements .
In all denitration projects, SCR technology is considered to be the most mature, with the most stable performance, the best denitration efficiency. Denitration catalyst refers to Power Plant SCR (selective catalytic reduction) catalyst on the NOx removal system, to promote the material and selectively reducing nitrogen oxides in the flue gas occurs at a certain temperature chemical reaction. Currently, the commonly used denitration catalyst contains the ingredient of tungsten trioxide (WO3) or [molybdenum trioxide (MoO3)], and its content is generally about 10% of the total catalyst mass; tungsten trioxide can play an anti-sulfide, poisoning resistance and other auxiliary roles; also, it can increase the temperature adaptability of titanium dioxide, the thermal stability of the carrier, playing the role of anti carrier sintering.
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Illegal Dumping Jailed in Yunnan, WO3 Photocatalyst Degrades Landfill Leachate
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- Category: Tungsten's News
- Published on Friday, 01 July 2016 17:36
- Written by chunyan
- Hits: 554
Not long ago, the first case of illegal dumping of landfill leachate and caused environmental pollution of Yunnan which has caused much concern has been adjudged; the defendant because of surrender and pleaded guilty with a good attitude, has jailed for 2 years and will respite for 2 years, also he was imposed a fine of 20,000 and do some service as a environment volunteer. It is reported that this case is because the defendant privately dumped his transportation of 29 cars which totaled 568.34 tons of pollutants into the environment, under the case of known the heavy metals, organic compounds should be transported to a special institution for professional treatment, and thus caused serious pollution to the surrounding environment. In this regard, the court verdict this case based on the principle of "spoiler repairs, polluter controls".
Landfill leachate is the high concentration of organic or inorganic ingredients liquid which generates from the landfill garbage piling up in the biochemical degradation process due to compaction, fermentation, etc., while in precipitation and groundwater seepage produces liquid comprising. In the biological pretreatment process, titanium dioxide photocatalyst has been used in the degradation of landfill leachate, and the experiments showed that this is a successful method for cleaning leachate. In addition, the experimental has derived the factors which influence photocatalytic oxidation process of landfill leachate, they are photocatalyst dosage, pH value, light intensity, illumination time and oxygen content dissolved in the water ect..
Tungsten trioxide (WO3), a yellow powder, the large number of it is used for the production of metal tungsten; in addition, WO3 has the property of semiconductor, with the band gap of 2.4eV ~ 2.8eV. WO3 as a photocatalyst can response to visible light, thus to fully use the solar energy, instead of relying on the ultraviolet light, such as titanium dioxide. Photocatalytic activity is a common decision of the ability of absorbing light, charge separation and the transferring efficiency to the substrate. WO3 has a wider spectral response capability, to this point of view, it should have a stronger catalytic oxidation than titanium dioxide, and can be used for landfill leachate degradation. In addition, studies have shown that yttrium (Y+) doped WO3 photocatalyst can improve the ability to absorb light, thus improve the photocatalytic activity of the system.
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Interpret "National Catalogue of Hazardous Wastes", Regenerate WO3 Waste Denitration Catalyst
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- Category: Tungsten's News
- Published on Friday, 01 July 2016 17:39
- Written by chunyan
- Hits: 612
Recently, China has revised and promulgated the "National Catalogue of Hazardous Wastes" (version 2016), and will be taken effect on August 1st, 2016. In this revising, the 49 major categories 400 kinds of hazardous wastes of the 2008 edition of was adjusted to 46 major categories 479 kinds (362 kinds from the original catalogue, and 117 kinds added); wherein the primary organic solvents waste, waste halogenated organic solvents and waste organic solvent are combined into the waste organic solvents and waste solvent-containing, and removed the containing polychlorinated furans waste and containing polychlorinated dioxins, while increased the waste category of waste catalyst at the same time.
With the deeply controlling of Chinese air pollution, the using amount of the catalyst which is the core of SCR denitration system will be more and more, and that means more waste catalyst will be created. The current approach to handle the waste denitration catalyst is usually the landfill, incineration, recycling treatment; the recycling treatment can divided into directly regeneration and comprehensive recovery; directly regeneration will be able to save a lot of money for the company, because the total cost of the catalyst takes about 30% of the whole investment of denitration system. SCR DeNOx catalyst usually takes titanium dioxide as the carrier, vanadium pentoxide as the main active material, tungsten trioxide (WO3) as the co-catalyst which plays the roles of sulfur poisoning, anti-sintering of carrier ect.. Because vanadium pentoxide is a highly toxic substance, if it is discharged directly into the environment, it will bring a huge threat to the environmental protection, and also may cause damage to human bodies and animals; therefore, it is imperative for its regeneration and recycling.
The regeneration methods of WO3 waste denitration catalyst ate the online regeneration and plant regeneration, on-site regeneration is now not advocated, due to secondary pollution caused, and the not enough professional of the on-site personnel; and the plant regeneration is a regenerated way which promoted more, because the activity of the renew waste WO3 denitration catalyst can be greatly, and furthermore, with the more perfect of the entire treatment process, it will cause no secondary pollution.
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First "Botanical Garden" Sewage Treatment Plant Settled Shanghai, WO3 Photocatalyst Treats Industrial Waste Water
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- Category: Tungsten's News
- Published on Thursday, 30 June 2016 17:49
- Written by chunyan
- Hits: 620
What is the sewage treatment plant looks like in your mind? Reinforced concrete sedimentation tanks, smelly, dirty, disorderly environment? No! The first "botanical garden" type sewage treatment plant will start to build and put into operation! Recently, it is reported that a "botanical garden" type sewage treatment plant has been built in the coast of Wu Song Shanghai, which introduced more than 3,000 species of plants and microorganisms, such as Datura flowers, Periwinkle, European alder, Canna, and is expected to be operational next year; by then , this botanical garden which uses the food chain reactor sewage treatment technology can not only improve the urban environment, but also can handle more than 40,000 cubic meters of polluted water for the urban residents every day.
Wet air oxidation method is proved to be an effective wastewater treatment technology, and already has been used in a large number of organic or polluted water containing toxic chemicals which the conventional biological treatment methods are not very effective; however, the strict reaction conditions cause the very expensive equipment and transportation costs, and therefore this method is rarely used in the treatment of organic industrial waste water. There has been a lot of research work on photocatalysis for the terms of general organic waste water treatment, foreign countries have large-scale photocatalytic degradation of organic wastewater and deeply processing experiments of drinking water, and furthermore Europe has been conducting experiments on photocatalytic purification of the river.
Tungsten trioxide (WO3) is the most common form of tungsten oxide, which is produced by controlling the appropriate reaction conditions, has the properties of electrochromic, gas sensitivity, semiconductor and so on. As one of semiconductor photocatalysts, WO3 can be used for the photocatalytic degradation of organic, dye and papermaking waste water; also it can be used to deal with inorganic pollution and inorganic synthesis; at the same time, it also plays an excellent effect on the photocatalytic decomposition of water to produce hydrogen. In addition, WO3photocatalyst plays an effective role in the treatment of organic phosphorus pesticide, dye wool and chlorinated organic compounds waste water ect..
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