高中英語閱讀理解拓展之玻璃回收

　　高中英語閱讀理解僅憑書本內(nèi)容很難有大的進(jìn)步，必須結(jié)合時事，進(jìn)行大量的課外閱讀，培養(yǎng)讀感，才能在英語卷面上拿到超出你本身詞匯量的得分，下面是小編整理的關(guān)于高中英語閱讀理解拓展之玻璃回收的資料，非常適合用來反復(fù)閱讀，希望對你有所幫助!

　　

 

　　Glass Recycling

　　Glass has the least volatile pricing of all the post consumer recycling commodities. Composed of sand and potash; bottle glass is made from readily available and inexpensive raw materials. To be competitive, recycled glass must maintain a price that competes with these abundant raw materials. Traded as flint (clear), amber (brown), emerald (green) or mixed color broken glass.

　　The price depends on the cleanliness and color of the recycled product. Clean flint cullet (another word for broken glass) is usually the most desirable form of recycled glass scrap. Mixed color broken glass with ceramics or stones mixed in it is the least desirable grade of cullet bringing the lowest price. Most Recyclers color sort and break or crush and screen bottles before selling their product.

　　Modern, high production bottle manufacturing requires very clean and uniform feedstock. Over the past decade there has been a growth in the glass benefaction sector. These are intermediate processors that receive glass from recycling programs and run it through a series of steps to remove any contaminants (rocks, ceramics, metal caps, etc.) and provide a uniform feedstock to the bottle manufacturers. These preprocessor provide an excellent market for recycling programs that do not have the volume or ability to produce glass for direct mill delivery.

　　Glass beneficiation plants use sophisticated optical sorting machines to separate the glass into the three color types. They may also x-ray the glass to detect any rocks or ceramics which are then removed. Magnets and eddy current separators are used to removed magnetic and non-magnetic metal contamination from caps and lids. The end product is a uniformly sized load of ground glass that is free of contaminants readily acceptable by bottle manufacturers.

　　Lower grades of recycled glass that are too mixed or contaminated, may be used in concrete or in road paving material called "Glass halt". In some areas where there is an overabundance of low grade glass it is used to cover over the rubbish in the land fill in place of sand. This is not truly recycling and it is hoped that better sorting technology will soon make this material usable for new bottles.

　　Glass recycling saves energy because recycled glass can be processed at a lower temperature than blending new glass from raw materials. Also, recycled glass is usually closer to the bottle plants than the sources of potash, the most expensive component in glass bottles and jars. Bout 32% of energy can be saved because of its low melting point.

　　It is easier to manufacture new glassware from recycled glass than from raw material, which can also reduce air pollution by 20%, and water pollution by 50%.

　　玻璃回收

　　在所有消費(fèi)后回收商品中，玻璃的價格波動最小。由沙子和鉀鹽組成;玻璃瓶是用現(xiàn)成的廉價原料制成的。為了具有競爭力，再生玻璃必須保持與這些豐富的原材料競爭的價格。以燧石(透明)、琥珀(棕色)、祖母綠(綠色)或混合色碎玻璃交易。

　　價格取決于回收產(chǎn)品的清潔度和顏色。干凈的燧石碎玻璃(碎玻璃的另一個詞)通常是回收玻璃廢料最理想的形式。混色碎玻璃中摻入陶瓷或石頭是價格最低的碎玻璃中最不理想的等級。大多數(shù)回收商在出售他們的產(chǎn)品之前對瓶子進(jìn)行顏色分類、破碎或壓碎、篩選。

　　現(xiàn)代，高產(chǎn)量的瓶子制造需要非常干凈和均勻的原料。在過去的十年里，玻璃捐贈行業(yè)有了增長。這些中間處理器接收回收程序中的玻璃，并通過一系列步驟去除污染物(巖石、陶瓷、金屬蓋等)，為瓶子制造商提供統(tǒng)一的原料。這些預(yù)處理器提供了一個很好的市場，為回收計劃，沒有數(shù)量或能力生產(chǎn)玻璃直接工廠交貨。

　　玻璃選礦廠使用先進(jìn)的光學(xué)分選機(jī)將玻璃分為三種顏色。他們還可以對玻璃進(jìn)行x光檢查，以檢測任何巖石或陶瓷，然后將其移除。磁鐵和渦流分離器用于去除蓋子和蓋子上的磁性和非磁性金屬污染物。最終產(chǎn)品是尺寸均勻的毛玻璃，不含瓶子制造商容易接受的污染物。

　　較低等級的再生玻璃，太混合或污染，可用于混凝土或道路鋪路材料稱為“玻璃”。在一些地方有一個過剩的低等級玻璃，它是用來覆蓋在土地上的垃圾填充沙的地方。這不是真正的回收，希望更好的分類技術(shù)將很快使這種材料可用于新的瓶子。

　　玻璃回收可以節(jié)約能源，因?yàn)榛厥盏牟ＡЭ梢栽谳^低的溫度下加工，而不是從原材料中混合新玻璃。此外，回收的玻璃通常比鉀鹽更接近瓶裝廠，鉀鹽是玻璃瓶和罐子中最昂貴的成分。由于其熔點(diǎn)低，可節(jié)省約32%的能源。

　　用再生玻璃制造新的玻璃器皿比用原材料制造新的玻璃器皿容易得多，還可以減少20%的空氣污染和50%的水污染。