Blogs
Notes from the heat side
Engineering notes on why linings fail, how to choose and install materials, and what changes by industry — written from what comes out of the furnace, not from a product catalogue.
The Heat Wire
What just moved in India’s heat industries
14 developments we have read and marked up for their refractory consequence — 9 of them in Gujarat. Compiled by hand on 26 July 2026; every figure links to the source it came from. This is a digest, not a live feed.
- Steel capacity, Jun 26
- 222 MTPA
FY25 → now, against the 300 MTPA policy target for 2030 (dashed)
- India crude steel: 14.21 Mt · May 26, +2.9% YoY
- Steel capacity: 222 MTPA · Jun 26, +10.8% vs FY25
- NSP 2030 target: 300 MTPA, 78 MTPA to build
- Morbi gas offtake: 2.70 mmscmd · 22 Apr, ×7.5 in 22 days
- Morbi units firing: 290 units, from 83 on 31 Mar
- Morbi share of tile output: 90 %, one gas exposure
- Hazira upstream: 15 MTPA target, from 9.6 · $5.1 bn
- Hazira programme: ₹60,000 crore, expansion in flight
- IOC Gujarat refinery: 360,000 bpd · mid-26, +86,000 bpd
- Sanghipuram kiln: 6.6 MTPA, CO₂ capture pilot
- India refractory market: $2.6 bn · 2025, 3.1–8% CAGR spread
- Domestic growth view: 6–13 % a year, RHI Magnesita
- Raw material imported: >50 % of requirement, magnesia China-concentrated
- Asia-Pacific demand share: 48.5 % · 2025, global refractory demand
- Recycled refractories: $21.7 bn by 2030, from 13.6 · 8.6% CAGR
- Spent-lining reuse: 20–25 % cost saving, where applicable
14 of 14 plotted
Steel
Ladles, tundishes, reheat furnaces, EAF roofs
Cement
Rotary kilns, preheaters, coolers
Ceramics & glass
Roller kilns, melting tanks, forehearths
Petrochemicals
Fired heaters, reformers, crackers
Supply & policy
Raw material, capacity, regulation
Gujarat Rest of IndiaNode size = scale of the moveSelect a node to read it← Scroll the chart for earlier quarters
India's steelmaking capacity reaches 222 MTPA against a 300 MTPA target for 2030
Crude steelmaking capacity stood at about 222 MTPA as of June 2026, up from 200.3 MTPA in 2024-25, on the way to the National Steel Policy target of 300 MTPA by 2030.
What it means for your lining
Seventy-eight MTPA of new capacity in four years is the demand case for Indian refractories — and the reason lead times, not price lists, are the early warning on availability.
The archive
Lining failure · 17 min read · Draft
Why Refractory Linings Fail: 9 Wear Mechanisms and How to Read Them
A refractory lining almost never fails for one reason. It fails because one mechanism opens a path and three more follow it in. This guide shows what each of the nine common wear mechanisms leaves behind, so you can diagnose a lining from what came out of the furnace instead of guessing at the next order.
Material selection · 14 min read · Draft
Brick, Castable, Plastic or Fibre? A Refractory Selection Guide That Starts With the Duty
Refractory selection goes wrong when it starts with a temperature rating. Peak temperature is the easiest requirement to meet and the least likely to be what kills your lining. This guide works through the six questions that actually determine the material, and maps them onto the seven families a plant normally buys.
Magnesite · 12 min read · Draft
Your Reheating Furnace Hearth Isn't Failing From Heat. It's Dissolving in Its Own Scale.
Every re-rolling mill that has replaced a hearth early knows the pattern: the brick was rated well above the furnace temperature, and it still went. The reason is chemistry, not heat — molten mill scale attacks high alumina brick at around 1200 °C. This is why 90% magnesite is the right brick for that specific job, and where it is not.
Installation · 12 min read · Draft
Refractory Dryout and Heat-Up: The 36 Hours That Decide Your Lining's Life
A castable lining can be perfectly specified, perfectly mixed and perfectly placed, and still be destroyed in its first eight hours of firing. Here is what is physically happening during cure and dryout, why steam is the enemy, and how to read a heat-up schedule instead of guessing at one.
Installation · 13 min read · Draft
14 Refractory Installation Mistakes That Cost You a Campaign
Most refractory linings that fail early were not badly specified. They were badly installed — an extra bucket of water, an anchor in the wrong plane, a joint that had nowhere to grow. These are the fourteen site-level mistakes that turn a good material into a short campaign.
Application techniques · 14 min read · Draft
Casting, Gunning, Shotcreting or Ramming? Choosing a Refractory Application Method
The same castable installed four different ways gives you four different linings. Application method decides density, uniformity, waste, downtime and ultimately campaign life — often more than the choice of grade does. Here is how the methods actually compare.
Industry applications · 14 min read · Draft
Refractory Wear by Industry: What Actually Kills the Lining in Steel, Cement, Glass, Aluminium, Power and Petrochemicals
The same castable behaves completely differently in a steel ladle, a cement preheater and an aluminium holding furnace — because each industry attacks it in a different way. A duty-by-duty map of the dominant wear mechanism in each sector, and what it implies for material choice.
Market outlook · 12 min read · Draft
The Refractory Market in 2026: What India's Buyers Should Actually Plan For
Global refractory demand is growing steadily, India faster than most — but the numbers that matter to a plant buying refractories are not the market-size headlines. They are raw-material import dependence, price volatility, decarbonisation-driven specification change, and the fibre regulations quietly reshaping what you are allowed to install.