![\"tungsten](\"\/img\/index-about2.jpg\")
2. Chemical Processing\nTungsten is extracted from concentrates using two main methods: <\/p>\n
Tungsten processing involves several steps to extract and refine tungsten from its ores, primarily wolframite (Fe,Mn)WO\u2084 and scheelite (CaWO\u2084). Here\u2019s an overview based on *Encyclop\u00e6dia Britannica* and other sources:<\/p>\n
1. Mining & Ore Concentration
\n– Tungsten ores are mined through open-pit or underground methods.
\n– Gravity separation is commonly used to concentrate the ore due to tungsten’s high density.
\n– Froth flotation may be employed for finer particles or scheelite ores. <\/p>\n
2. Chemical Processing
\nTungsten is extracted from concentrates using two main methods: <\/p>\n
# A. Alkali Leaching (for Scheelite)
\n– Scheelite reacts with sodium carbonate (Na\u2082CO\u2083) under high pressure\/temperature:
\n \\[ \\text{CaWO}_4 + \\text{Na}_2\\text{CO}_3 \\rightarrow \\text{Na}_2\\text{WO}_4 + \\text{CaCO}_3 \\]
\n– The sodium tungstate solution is purified and precipitated as calcium tungstate or converted to ammonium paratungstate (APT). <\/p>\n
# B. Acid Leaching (for Wolframite)
\n– Wolframite is digested with hydrochloric acid (HCl) or sodium hydroxide (NaOH):
\n \\[ \\text{(Fe,Mn)WO}_4 + 2\\text{NaOH} \\rightarrow \\text{Na}_2\\text{WO}_4 + \\text{(Fe,Mn)(OH)}_2 \\] The resulting sodium tungstate is further processed into APT. <\/p>\n
3. Production of Tungsten Powder
\n– Ammonium paratungstate (APT) is calcined to form tungsten trioxide (WO\u2083):
\n \\[ (\\text{NH}_4)_10\\text{W}_{12}\\text{O}_{41} \\cdot 5\\text{H}_2\\text{O} \\rightarrow 12\\text{WO}_3 + 10\\text{NH}_3 + 10\\text{H}_2\\text{O} \\]
\n– WO\u2083 is reduced in hydrogen furnaces to produce tungsten powder:
\n \\[ \\text{WO}_3 + 3\\text{H}_2 \\rightarrow \\text{W} + 3\\text{H}_2\\text{O} \\] <\/p>\n
4. Manufacturing Tungsten Products
\n– Cemented Carbides:<\/p>\n","protected":false},"excerpt":{"rendered":"
Tungsten processing involves several steps to extract and refine tungsten from its ores, primarily wolframite (Fe,Mn)WO\u2084 and scheelite (CaWO\u2084). Here\u2019s an overview based on *Encyclop\u00e6dia Britannica* and other sources: 1. Mining & Ore Concentration – Tungsten ores are mined through open-pit or underground methods. – Gravity separation is commonly used to concentrate the ore due […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[40],"tags":[],"class_list":["post-10307","post","type-post","status-publish","format-standard","hentry","category-product-news"],"_links":{"self":[{"href":"https:\/\/www.zwccrusher.com\/index.php\/wp-json\/wp\/v2\/posts\/10307","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zwccrusher.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zwccrusher.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zwccrusher.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zwccrusher.com\/index.php\/wp-json\/wp\/v2\/comments?post=10307"}],"version-history":[{"count":0,"href":"https:\/\/www.zwccrusher.com\/index.php\/wp-json\/wp\/v2\/posts\/10307\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zwccrusher.com\/index.php\/wp-json\/wp\/v2\/media?parent=10307"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zwccrusher.com\/index.php\/wp-json\/wp\/v2\/categories?post=10307"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zwccrusher.com\/index.php\/wp-json\/wp\/v2\/tags?post=10307"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}