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National Smelting Company
The National Smelting Company was a nationalised zinc smelting company in Avonmouth, England. It was established by Minister of Munitions Winston Churchill to produce mustard gas during World War I. After World War I, it was bought by private business interests. From 1929 it became part of Australia's Imperial Smelting Corporation. The site – also known as the Britannia smelting works – was where the Imperial Smelting Process was developed. From 1967, the Avonmouth Works was home to the largest and most efficient zinc blast furnace in the world. The site remained operational until 2003 when the production of zinc, cadmium, lead and sulphuric acid ceased. The site is being redeveloped as a supermarket distribution centre for Asda and a recycling plant for SITA UK. Background During the later part of World War I, it was proposed to make Avonmouth Docks the UK centre of production of dichloroethyl sulphide, also known as mustard gas. However, its production was against the H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zinc Smelting
Zinc smelting is the process of converting zinc concentrates (ores that contain zinc) into pure zinc. Zinc smelting has historically been more difficult than the smelting of other metals, e.g. iron, because in contrast, zinc has a low boiling point. At temperatures typically used for smelting metals, zinc is a gas that will escape from a furnace with the flue gas and be lost, unless specific measures are taken to prevent it. The most common zinc concentrate processed is zinc sulfide,. which is obtained by concentrating sphalerite using the froth flotation method. Secondary (recycled) zinc material, such as zinc oxide, is also processed with the zinc sulfide.. Approximately 30% of all zinc produced is from recycled sources. Methods There are two methods of smelting zinc: the pyrometallurgical process and the electrolysis process. Both methods are still used. Both of these processes share the same first step: roasting. Roasting Roasting is a process of oxidizing zinc sulfide co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulphuric Acid
Sulfuric acid (American spelling and the preferred IUPAC name) or sulphuric acid ( Commonwealth spelling), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with the molecular formula . It is a colorless, odorless and viscous liquid that is miscible with water. Pure sulfuric acid does not exist naturally on Earth due to its strong affinity to water vapor; it is hygroscopic and readily absorbs water vapor from the air. Concentrated sulfuric acid is highly corrosive towards other materials, from rocks to metals, since it is an oxidant with powerful dehydrating properties. Phosphorus pentoxide is a notable exception in that it is not dehydrated by sulfuric acid, but to the contrary dehydrates sulfuric acid to sulfur trioxide. Upon addition of sulfuric acid to water, a considerable amount of heat is released; thus the reverse procedure of adding water to the acid should not be performed since the heat released may boil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Department Of Primary Industries (New South Wales)
The New South Wales Department of Primary Industries (DPI) is an agency of the New South Wales Government, responsible for the administration and development for agriculture, fisheries, aquaculture, forestry, and biosecurity in New South Wales. The DPI works to drive innovation in primary industries to improve resilience, productivity and sustainability, and to ensure risks are managed for natural resources, farming and food. Despite the name, the DPI is no longer and is not a department of the New South Wales government. The DPI is part of the Department of Regional NSW, and was previously part of the Department of Planning, Industry and Environment until April 2020. The DPI headquarters is located in Orange. Structure Leadership The DPI is led by its director-general, currently Scott Hansen, who reports to the Minister for Agriculture and Western New South Wales, presently the Honourable Adam Marshall . The DPI sits within the wider portfolio of the Department of Regional ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Consolidated Zinc
Consolidated Zinc was an Australian mining company from 1905 to 1962. History The company's initial operations focused on extracting zinc from mine tailings of the Broken Hill Ore Deposit at Broken Hill, New South Wales, Australia. The company was founded in Melbourne on 9 September 1905 as the Zinc Corporation Limited, to exploit residual zinc concentrations with an estimated value of $12 million in the 6 million tons of mine tailings deposited from mining activities over the previous 20 years. Key figures involved in the effort included William Baillieu and William Sydney Robinson. Also involved was future U.S. president, but then a mining engineer working for Bewick, Moreing and Company, Herbert Hoover, who inspected the tailing dumps in the group's investigations prior to formation of the company. Other investors in the new company were Clark & Robinson (William Clark, Lionel Robinson and Company), and Arthur Terrell. They established concentrating mills at Broken Hill ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Influenza
Influenza, commonly known as "the flu", is an infectious disease caused by influenza viruses. Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue. These symptoms begin from one to four days after exposure to the virus (typically two days) and last for about 2–8 days. Diarrhea and vomiting can occur, particularly in children. Influenza may progress to pneumonia, which can be caused by the virus or by a subsequent bacterial infection. Other complications of infection include acute respiratory distress syndrome, meningitis, encephalitis, and worsening of pre-existing health problems such as asthma and cardiovascular disease. There are four types of influenza virus, termed influenza viruses A, B, C, and D. Aquatic birds are the primary source of Influenza A virus (IAV), which is also widespread in various mammals, including humans and pigs. Influenza B virus (IBV) and Influenza C virus (ICV) pri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hundred Days' Offensive
The Hundred Days Offensive (8 August to 11 November 1918) was a series of massive Allied offensives that ended the First World War. Beginning with the Battle of Amiens (8–12 August) on the Western Front, the Allies pushed the Central Powers back, undoing their gains from the German spring offensive. The Germans retreated to the Hindenburg Line, but the Allies broke through the line with a series of victories, starting with the Battle of St Quentin Canal on 29 September. The offensive, together with a revolution breaking out in Germany, led to the Armistice of 11 November 1918 which ended the war with an Allied victory. The term "Hundred Days Offensive" does not refer to a battle or strategy, but rather the rapid series of Allied victories against which the German Army had no reply. Background The German spring offensive of the German Army on the Western Front had begun on 21 March 1918 with Operation Michael and had petered out by July. The Germans had advanced to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hindenburg Line
The Hindenburg Line (German: , Siegfried Position) was a German defensive position built during the winter of 1916–1917 on the Western Front during the First World War. The line ran from Arras to Laffaux, near Soissons on the Aisne. In 1916, the Battle of Verdun and the Battle of the Somme left the German western armies () exhausted and on the Eastern Front, the Brusilov Offensive had inflicted huge losses on the Austro-Hungarian armies and forced the Germans to take over more of the front. The declaration of war by Romania had placed additional strain on the German army and war economy. The Hindenburg Line, built behind the Noyon Salient, was to replace the old front line as a precaution against a resumption of the Battle of the Somme in 1917. By wasting the intervening ground, the Germans could delay a spring offensive in 1917. A shortened front could be held with fewer troops and with tactical dispersal, reverse-slope positions, defence in depth and camouflage, Germ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
First Armistice At Compiègne
The Armistice of 11 November 1918 was the armistice signed at Le Francport near Compiègne that ended fighting on land, sea, and air in World War I between the Entente and their last remaining opponent, Germany. Previous armistices had been agreed with Bulgaria, the Ottoman Empire and Austria-Hungary. It was concluded after the German government sent a message to American president Woodrow Wilson to negotiate terms on the basis of a recent speech of his and the earlier declared "Fourteen Points", which later became the basis of the German surrender at the Paris Peace Conference, which took place the following year. Also known as the Armistice of Compiègne (french: Armistice de Compiègne, german: Waffenstillstand von Compiègne) from the place where it was officially signed at 5:45 a.m. by the Allied Supreme Commander, French Marshal Ferdinand Foch, it came into force at 11:00 a.m. Central European Time (CET) on 11 November 1918 and marked a vi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hereford
Hereford () is a cathedral city, civil parish and the county town of Herefordshire, England. It lies on the River Wye, approximately east of the border with Wales, south-west of Worcester and north-west of Gloucester. With a population of 53,112 in 2021 it is by far the largest settlement in Herefordshire. An early town charter from 1189, granted by Richard I of England, describes it as "Hereford in Wales". Hereford has been recognised as a city since time immemorial, with the status being reconfirmed as recently as October 2000. It is now known chiefly as a trading centre for a wider agricultural and rural area. Products from Hereford include cider, beer, leather goods, nickel alloys, poultry, chemicals and sausage rolls, as well as the famous Hereford breed of cattle. Toponymy The Herefordshire edition of Cambridge County Geographies states "a Welsh derivation of Hereford is more probable than a Saxon one" but the name "Hereford" is also said to come from the Angl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Banbury
Banbury is a historic market town on the River Cherwell in Oxfordshire, South East England. It had a population of 54,335 at the 2021 Census. Banbury is a significant commercial and retail centre for the surrounding area of north Oxfordshire and southern parts of Warwickshire and Northamptonshire which are predominantly rural. Banbury's main industries are motorsport, car components, electrical goods, plastics, food processing and printing. Banbury is home to the world's largest coffee-processing facility (Jacobs Douwe Egberts), built in 1964. The town is famed for Banbury cakes, a spiced sweet pastry dish. Banbury is located north-west of London, south-east of Birmingham, south-east of Coventry and north-west of Oxford. History Toponymy The name Banbury may derive from "Banna", a Saxon chieftain said to have built a stockade there in the 6th century (or possibly a byname from ang, bana meaning ''felon'', ''murderer''), and / meaning ''settlement''. In Anglo Saxon i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxford University Press
Oxford University Press (OUP) is the university press of the University of Oxford. It is the largest university press in the world, and its printing history dates back to the 1480s. Having been officially granted the legal right to print books by decree in 1586, it is the second oldest university press after Cambridge University Press. It is a department of the University of Oxford and is governed by a group of 15 academics known as the Delegates of the Press, who are appointed by the vice-chancellor of the University of Oxford. The Delegates of the Press are led by the Secretary to the Delegates, who serves as OUP's chief executive and as its major representative on other university bodies. Oxford University Press has had a similar governance structure since the 17th century. The press is located on Walton Street, Oxford, opposite Somerville College, in the inner suburb of Jericho. For the last 500 years, OUP has primarily focused on the publication of pedagogical texts and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chloropicrin
Chloropicrin, also known as PS and nitrochloroform, is a chemical compound currently used as a broad-spectrum antimicrobial, fungicide, herbicide, insecticide, and nematicide. It was used as a poison gas in World War I. Its chemical structural formula is Cl3CNO2. Synthesis Chloropicrin was discovered in 1848 by Scottish chemist John Stenhouse. He prepared it by the reaction of sodium hypochlorite with picric acid: : HOC6H2(NO2)3 + 11 NaOCl → 3 Cl3CNO2 + 3 Na2CO3 + 3 NaOH + 2 NaCl Because of the precursor used, Stenhouse named the compound chloropicrin, although the two compounds are structurally dissimilar. Today, chloropicrin is manufactured by the reaction of nitromethane with sodium hypochlorite: : H3CNO2 + 3 NaOCl → Cl3CNO2 + 3 NaOH or by the reaction of chloroform with nitric acid: : CHCl3 + HNO3 → CCl3NO2 + H2O Properties Chloropicrin's chemical formula is CCl3NO2 and its molecular weight is 164.38 grams/mole. Pure chloropicrin is a colorless liquid, with a boiling po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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