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Calcium Carbide 7-15mm – The Versatile Workhorse for Modern Industry

What makes 7-15mm calcium carbide the preferred choice for so many industrial applications? It is the perfect balance – fine enough to react swiftly and completely, yet coarse enough to minimise dust, simplify handling, and reduce storage losses. We are a Chinese manufacturer with an annual production capacity of 70,000 metric tons, and we have perfected the production of this mid‑range grade to meet the diverse needs of customers across the globe. Whether you run a welding workshop, a chemical plant, or a steel foundry, 7-15mm calcium carbide delivers reliable performance at a competitive cost.

Why 7-15mm? The Ideal Compromise

In the world of calcium carbide, particle size directly influences reaction speed, gas yield, and ease of use. The 7-15mm grade sits right in the middle – offering controlled, consistent acetylene release without the rapid exhaustion seen in finer powders, and faster dissolution than larger lumps. This makes it exceptionally versatile. Here are the primary applications where 7-15mm calcium carbide truly shines:

• Acetylene Generation for Welding and Cutting – When reacted with water, 7-15mm calcium carbide produces acetylene gas with a guaranteed yield of ≥295 L/kg. The steady, predictable reaction rate makes it ideal for portable acetylene generators used in construction, shipbuilding, and pipeline maintenance. Unlike finer grades that may react too violently, 7-15mm offers a manageable exothermic profile, enhancing operator safety.

• Chemical Synthesis – PVC and Beyond – Acetylene derived from this grade serves as a key feedstock for polyvinyl chloride (PVC), synthetic rubber, vinyl acetate, and acrylic acid derivatives. The uniform particle size ensures complete conversion in fluid‑bed reactors and stirred‑tank processes, maximising your chemical yield and reducing unreacted residues.

• Steel Desulfurisation and Deoxidation – While finer powders are often used for ladle injection, 7-15mm calcium carbide is frequently employed in open‑ladle treatment and tundish operations. Its moderate surface area allows for controlled sulfur removal without excessive fuming, making it a favourite among foundries producing ductile iron and high‑grade steel.

• Fruit Ripening in Agriculture – In many developing regions, farmers rely on calcium carbide to ripen bananas, mangoes, and citrus fruits. The 7-15mm granules are easy to pack into small porous bags and place among fruit crates. The moisture in the air triggers a steady release of acetylene, mimicking natural ethylene and delivering uniform ripening within 24‑48 hours.

• Calcium Cyanamide (Lime Nitrogen) Production – When heated with nitrogen, 7-15mm calcium carbide converts to calcium cyanamide – a slow‑release nitrogen fertiliser and a valuable intermediate for pesticide synthesis. The granule size ensures even nitridation and consistent product quality.

• 

One Supplier, Every Size You Need

While 7-15mm is our spotlight grade, we maintain full inventories of all standard sizes:

• 1‑4mm – fine powder for rapid reactions and precision metallurgy

• 4‑7mm – favoured for desulphurisation and small‑scale generators

• 7‑15mm – the all‑rounder for welding, chemicals, and agriculture (featured)

• 15‑25mm – common in medium‑sized acetylene plants

• 25‑50mm – the classic grade for portable welding torches

• 50‑80mm – preferred for large steel mills and industrial gas plants

• 80‑120mm – bulk lumps for high‑capacity desulphurisation

Whatever your process requires, we can supply it – and we can even blend different sizes in a single container to meet your varied production lines.

Packaging Engineered for Protection and Efficiency

Moisture is the enemy of calcium carbide. Our packaging solutions are designed to keep it out, from our factory to your doorstep. We offer two standard drum sizes:

• 50kg new steel drums – 450 drums per 20‑foot container = 22.5 metric tons net

• 100kg new steel drums – 225 drums per 20‑foot container = 22.5 metric tons net

Each drum is nitrogen‑purged, fitted with a double‑sealed lid, and complies fully with UN 1402 (Class 4.3 – Dangerous when wet). We also apply rust‑proof coatings and use heavy‑gauge steel to withstand rough handling during ocean transit. For extra safety, we can add inner plastic liners upon request.

Customisation – Make It Yours

We understand that every brand and every operation has unique requirements. That is why we offer comprehensive customisation at no additional charge for standard markings:

• Choose your drum colour – select from grey, black, blue, green, yellow, or any RAL code you specify.

• Print your own shipping marks  – include your logo, product name, batch number, net/gross weight, handling pictograms, and any other information you need.

• Mixed palletising – we can arrange palletised loads with shrink‑wrapping for easy forklift unloading.

• Custom label languages – we can print safety warnings and handling instructions in English, French, Spanish, Arabic, or Portuguese.

These options make your supply chain smoother and reinforce your professional image in your local market.

Global Reach – Serving Africa, South America, the Middle East, and Southeast Asia

Our 7-15mm calcium carbide is exported to customers on four continents. In Africa, we are a regular supplier to Nigeria, Ghana, Cameroon, Kenya, and South Africa – countries with growing steel fabrication and chemical sectors. The West African market, in particular, has shown increasing demand for mid‑grade carbide due to the expansion of local acetylene filling plants.

In South America, our clients include foundries in Colombia, Peru, Chile, and Ecuador, where the mining and metalworking industries rely on our consistent quality. The Middle East is another key region – we supply Saudi Arabia, United Arab Emirates, Kuwait, and Iran with 7-15mm calcium carbide for both petrochemical synthesis and desulphurisation. Across Southeast Asia, our partners in Vietnam, Indonesia, Thailand, and the Philippines benefit from our fast shipping routes and responsive logistics.

We also export to Europe, North America, and Australia – truly a worldwide footprint.

Certifications and Quality Assurance

Every batch of 7-15mm calcium carbide is tested and documented. With each shipment you receive:

• Gas yield certificate – guaranteed ≥295 L/kg acetylene (or higher upon request)

• ISO 9001:2015 quality management certification

• SGS inspection – available per batch at your request

• UN 1402 dangerous goods compliance certificate

• Material Safety Data Sheet (MSDS) – in your preferred language

• Third‑party analysis – we can arrange additional tests for phosphorus, sulphur, and nitrogen content

All records are retained for five years, giving you full traceability and peace of mind.

Fast Dispatch – Thanks to Our Massive Warehouse

We do not operate on a just‑in‑time basis – we keep substantial safety stock of 7-15mm and all other grades in our large warehouse. This means when you place an order, we can usually ship within 7 working days – and often sooner for urgent requests. Our logistics team has established relationships with major shipping lines, securing competitive freight rates and reliable schedules. We handle all export documentation, customs clearance, and insurance arrangements, so you can focus on your core business.

Why Choose Our 7-15mm Calcium Carbide?

• Factory‑direct pricing – no intermediaries, lower costs for you.

• 70,000‑ton annual capacity – stable supply for both trial orders and multi‑year contracts.

• Full size range – all grades in stock, ready to ship.

• Flexible packaging – 50kg or 100kg drums, any colour, any marking.

• Global logistics – we ship to over 40 countries with proven export expertise.

• Certified quality – ISO, SGS, and UN‑compliant with full traceability.

• Responsive support – quotes within 24 hours, samples available for testing.

Get Your 7-15mm Calcium Carbide Quote Today

Tell us your required particle size (or let us recommend the best grade for your application), your preferred drum weight, colour, and marking specifications. We will prepare a competitive quotation and shipping plan within 24 hours. Whether you are a first‑time buyer or a long‑standing partner, you will receive the same dedication to quality and service.

Contact us now – and discover why 7-15mm calcium carbide is the workhorse that keeps industries running smoothly, from acetylene torches to steel ladles, from fruit fields to polymer reactors.