{"id":1570,"date":"2025-04-08T13:45:26","date_gmt":"2025-04-08T05:45:26","guid":{"rendered":"https:\/\/ali-carbon.com\/?p=1570"},"modified":"2025-04-08T13:45:26","modified_gmt":"2025-04-08T05:45:26","slug":"why-use-graphite-petroleum-coke-in-foundries","status":"publish","type":"post","link":"https:\/\/ali-carbon.com\/ja\/why-use-graphite-petroleum-coke-in-foundries\/","title":{"rendered":"Why Use Graphite Petroleum Coke in Foundries?"},"content":{"rendered":"<p>Struggling with inconsistent carbon recovery or slag issues in your foundry? You're not alone\u2014many operations face these costly inefficiencies.<\/p>\n<p>Graphite Petroleum Coke (GPC) is widely used in foundries due to its high fixed carbon content, low sulfur, and excellent absorption rate, making it one of the most effective carbon raisers for clean and stable molten metal.<\/p>\n<p>Let\u2019s explore why GPC is the go-to recarburizer for modern foundries\u2014and how it compares with other carbon sources.<\/p>\n<h2>What is Graphite Petroleum Coke and How Is It Made?<\/h2>\n<p>Wondering what sets GPC apart from regular petroleum coke or anthracite? The answer lies in its structure.<\/p>\n<p>Graphite Petroleum Coke is a byproduct of oil refining that\u2019s been further heat-treated at high temperatures (2800\u20133000\u00b0C) to transform into graphitized carbon. The result is a highly pure, crystalline carbon additive ideal for metallurgy.<\/p>\n<h3>GPC vs Raw Petroleum Coke<\/h3>\n<table>\n<thead>\n<tr>\n<th>Property<\/th>\n<th>\u30b8\u30fc\u30d4\u30fc\u30b7\u30fc<\/th>\n<th>Raw Pet Coke<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Fixed Carbon<\/td>\n<td>\u226598.5%<\/td>\n<td>85\u201390%<\/td>\n<\/tr>\n<tr>\n<td>Sulfur<\/td>\n<td>\u22640.05%<\/td>\n<td>&gt;1%<\/td>\n<\/tr>\n<tr>\n<td>Ash<\/td>\n<td>\u22640.7%<\/td>\n<td>2\u20134%<\/td>\n<\/tr>\n<tr>\n<td>Volatile Matter<\/td>\n<td>\u22640.8%<\/td>\n<td>10\u201315%<\/td>\n<\/tr>\n<tr>\n<td>Cost<\/td>\n<td>Higher<\/td>\n<td>Lower<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>GPC offers far superior purity and reactivity, which means more efficient carbon uptake and fewer contaminants in the melt.<\/p>\n<p>For more details on GPC grades, see our <a href=\"https:\/\/ali-carbon.com\/ja\/graphite-petroleum-coke\/\" target=\"_blank\" rel=\"noopener\">Graphite Petroleum Coke product page<\/a>.<\/p>\n<h2>Why is GPC Preferred for Ductile and Gray Iron?<\/h2>\n<p>Foundry-grade GPC isn\u2019t just cleaner\u2014it\u2019s essential for critical casting applications.<\/p>\n<p>In ductile and gray iron production, low sulfur and high fixed carbon are non-negotiable. That\u2019s why foundries increasingly prefer GPC over <a href=\"https:\/\/ali-carbon.com\/ja\/calcined-anthracite-coal\/\" target=\"_blank\" rel=\"noopener\">\u713c\u6210\u7121\u7159\u70ad<\/a> or traditional coke-based carbon raisers.<\/p>\n<h3>GPC Benefits for Iron Casting<\/h3>\n<ul>\n<li><strong>Low Sulfur (&lt;0.05%)<\/strong> \u2013 Prevents undesired reactions in molten iron.<\/li>\n<li><strong>High Absorption Rate<\/strong> \u2013 Fast melting and consistent carbon recovery.<\/li>\n<li><strong>Low Ash<\/strong> \u2013 Reduces slag and improves melt fluidity.<\/li>\n<li><strong>High Carbon Recovery<\/strong> \u2013 Often &gt;95% when added properly.<\/li>\n<\/ul>\n<p>Many of our customers switched from calcined petroleum coke to GPC and reported better casting consistency, especially in thin-wall components.<\/p>\n<h2>When Should You Use GPC Over Other Recarburizers?<\/h2>\n<p>Choosing between GPC, CPC, and anthracite depends on your furnace, product quality goals, and budget.<\/p>\n<p>Here\u2019s a quick guide:<\/p>\n<table>\n<thead>\n<tr>\n<th>Application<\/th>\n<th>Recommended Recarburizer<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Ductile Iron<\/td>\n<td>GPC or Artificial Graphite<\/td>\n<\/tr>\n<tr>\n<td>High-Strength Gray Iron<\/td>\n<td>\u30b8\u30fc\u30d4\u30fc\u30b7\u30fc<\/td>\n<\/tr>\n<tr>\n<td>Carbon Steel<\/td>\n<td>GPC \/ CPC<\/td>\n<\/tr>\n<tr>\n<td>Budget Foundry Melt<\/td>\n<td><a href=\"https:\/\/ali-carbon.com\/ja\/calcined-anthracite-coal\/\" target=\"_blank\" rel=\"noopener\">Calcined Anthracite<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>For high-end casting where sulfur and ash control is critical, GPC offers unmatched performance.<\/p>\n<p>Explore our <a href=\"https:\/\/ali-carbon.com\/ja\/calcined-petroleum-coke\/\" target=\"_blank\" rel=\"noopener\">\u30af\u30ea\u30c3\u30af\u5358\u4fa1<\/a> page if you're comparing options.<\/p>\n<h2>How to Use GPC for Best Results in Foundry Operations?<\/h2>\n<p>Even with high-quality GPC, your results depend on how you use it.<\/p>\n<h3>Best Practices:<\/h3>\n<ul>\n<li><strong>Add Early in Melt<\/strong> \u2013 GPC absorbs better when the bath is turbulent.<\/li>\n<li><strong>Preheat if Moist<\/strong> \u2013 Ensure material is dry to avoid foaming.<\/li>\n<li><strong>Use 1\u20135mm or 2\u20136mm Size<\/strong> \u2013 Best for induction and electric furnaces.<\/li>\n<li><strong>Avoid Overuse<\/strong> \u2013 Adding too much increases slag and cost.<\/li>\n<\/ul>\n<p>We recommend testing different mesh sizes\u2014our foundry clients in Europe often prefer 1\u20135mm for gray iron and 2\u20136mm for ductile iron.<\/p>\n<h2>What Makes GPC a Long-Term Cost Saver?<\/h2>\n<p>While GPC may cost more upfront, it saves in:<\/p>\n<ul>\n<li><strong>Lower Rejection Rates<\/strong><\/li>\n<li><strong>Reduced Slag Handling<\/strong><\/li>\n<li><strong>Shorter Melting Time<\/strong><\/li>\n<li><strong>Consistent Chemistry = Fewer Corrections<\/strong><\/li>\n<\/ul>\n<p>One Southeast Asian ductile iron foundry cut their correction rate by 30% after switching to our high-purity <a href=\"https:\/\/ali-carbon.com\/ja\/graphite-petroleum-coke\/\" target=\"_blank\" rel=\"noopener\">\u30b8\u30fc\u30d4\u30fc\u30b7\u30fc<\/a>. They recovered their investment in less than one month.<\/p>\n<hr \/>\n<h2>\u7d50\u8ad6<\/h2>\n<p>Graphite Petroleum Coke offers unmatched purity, efficiency, and reliability in foundry applications\u2014making it the smart choice for quality iron casting.<\/p>\n<h2>Call to action<\/h2>\n<p>Looking to improve your casting quality and carbon efficiency?<br \/>\n\ud83d\udce7 Email: alicarbonindustrial@gmail.com<br \/>\n\ud83d\udcde WhatsApp: +86-18202528603<br \/>\nLet us help you choose the right GPC grade and size for your foundry needs\u2014fast delivery, low MOQ, expert support.<\/p>\n<style>\n.faq-question {\ncursor: pointer;\nfont-weight: bold;\npadding: 10px;\nbackground-color: #f1f1f1;\nborder: 1px solid #ddd;\nmargin-bottom: 5px;\ncolor: #0073aa;\n}\n.faq-answer {\ndisplay: none;\npadding: 10px;\nborder-left: 3px solid #0073aa;\nbackground-color: #f9f9f9;\nmargin-bottom: 10px;\n}\n<\/style>\n<p><script>\ndocument.addEventListener('DOMContentLoaded', function() {\nconst questions = document.querySelectorAll('.faq-question');\nquestions.forEach(question => {\nquestion.addEventListener('click', function() {\nconst answer = this.nextElementSibling;\nanswer.style.display = answer.style.display === 'block' ? 'none' : 'block';\n});\n});\n});\n<\/script><br \/>\n<!-- JSON-LD FAQ Schema --><br \/>\n<script type=\"application\/ld+json\">\n{\n\"@context\": \"https:\/\/schema.org\",\n\"@type\": \"FAQPage\",\n\"mainEntity\": [\n{\n\"@type\": \"Question\",\n\"name\": \"Is GPC suitable for both ductile and gray iron?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"Yes. Its low sulfur and high purity make it ideal for both types of iron.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"What&rsquo;s the difference between GPC and CPC?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"GPC is graphitized and purer than CPC. CPC has higher sulfur and ash, but lower cost.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"Can I use GPC in induction furnaces?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"Absolutely. In fact, GPC has a high absorption rate in induction furnaces, especially in early melt stages.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"What size of GPC should I use?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"1&ndash;5mm or 2&ndash;6mm is recommended for most foundry applications.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"Is GPC cost-effective?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"While the initial price is higher, GPC reduces waste, increases carbon recovery, and improves casting quality&mdash;resulting in long-term savings.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"Does GPC contain any harmful substances?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"Our GPC has sulfur &le;0.05%, ash &le;0.7%, and no harmful metals&mdash;certified and tested.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"Can GPC be mixed with other recarburizers?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"Yes. Many foundries blend GPC with calcined anthracite to balance cost and performance.\"\n}\n},\n{\n\"@type\": \"Question\",\n\"name\": \"Do you offer SGS certification or technical data?\",\n\"acceptedAnswer\": {\n\"@type\": \"Answer\",\n\"text\": \"Yes. We provide COA, MSDS, and third-party reports upon request.\"\n}\n}\n]\n}\n<\/script><\/p>\n<h2>People Also Ask<\/h2>\n<div class=\"faq-container\">\n<div class=\"faq-question\">1. Is GPC suitable for both ductile and gray iron?<\/div>\n<div class=\"faq-answer\">Yes. Its low sulfur and high purity make it ideal for both types of iron.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">2. What\u2019s the difference between GPC and CPC?<\/div>\n<div class=\"faq-answer\">GPC is graphitized and purer than CPC. CPC has higher sulfur and ash, but lower cost.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">3. Can I use GPC in induction furnaces?<\/div>\n<div class=\"faq-answer\">Absolutely. In fact, GPC has a high absorption rate in induction furnaces, especially in early melt stages.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">4. What size of GPC should I use?<\/div>\n<div class=\"faq-answer\">1\u20135mm or 2\u20136mm is recommended for most foundry applications.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">5. Is GPC cost-effective?<\/div>\n<div class=\"faq-answer\">While the initial price is higher, GPC reduces waste, increases carbon recovery, and improves casting quality\u2014resulting in long-term savings.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">6. Does GPC contain any harmful substances?<\/div>\n<div class=\"faq-answer\">Our GPC has sulfur \u22640.05%, ash \u22640.7%, and no harmful metals\u2014certified and tested.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">7. Can GPC be mixed with other recarburizers?<\/div>\n<div class=\"faq-answer\">Yes. Many foundries blend GPC with <a href=\"https:\/\/ali-carbon.com\/ja\/calcined-anthracite-coal\/\" target=\"_blank\" rel=\"noopener\">calcined anthracite<\/a> to balance cost and performance.<\/div>\n<\/div>\n<div class=\"faq-container\">\n<div class=\"faq-question\">8. Do you offer SGS certification or technical data?<\/div>\n<div class=\"faq-answer\">Yes. We provide COA, MSDS, and third-party reports upon request.<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Struggling with inconsistent carbon recovery or slag issues in your foundry? You&#8217;re not alone\u2014many operations face these costly inefficiencies. Graphite Petroleum Coke (GPC) is widely used in foundries due to its high fixed carbon content, low sulfur, and excellent absorption rate, making it one of the most effective carbon raisers for clean and stable molten&#8230;<\/p>","protected":false},"author":1,"featured_media":1202,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"default","_kad_post_title":"default","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1570","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/ali-carbon.com\/ja\/wp-json\/wp\/v2\/posts\/1570"}],"collection":[{"href":"https:\/\/ali-carbon.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ali-carbon.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ali-carbon.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ali-carbon.com\/ja\/wp-json\/wp\/v2\/comments?post=1570"}],"version-history":[{"count":0,"href":"https:\/\/ali-carbon.com\/ja\/wp-json\/wp\/v2\/posts\/1570\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ali-carbon.com\/ja\/wp-json\/wp\/v2\/media\/1202"}],"wp:attachment":[{"href":"https:\/\/ali-carbon.com\/ja\/wp-json\/wp\/v2\/media?parent=1570"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ali-carbon.com\/ja\/wp-json\/wp\/v2\/categories?post=1570"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ali-carbon.com\/ja\/wp-json\/wp\/v2\/tags?post=1570"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}