Water-Free Injection Mix for Blast Furnace Shell Grouting & Repairs

Water-free injection mix exists because of a specific constraint: you cannot put water into a hot lining. Water flashes to steam, and steam in a confined refractory structure causes thermal shock to adjacent material and can build pressure where you do not want it. For void filling behind a blast furnace lining or cooling elements, that rules out conventional grouts.

Two Chemistries, Two Purposes

• XZK-YRL-LB — alumina-based, 55% Al₂O₃, refractoriness ≥1760 °C, bulk density 2.20 g/cm³, crushing strength 10 MPa, flow value 170–185%. For general void filling where the fill itself must be refractory.
• XZK-YRL-LD — carbon-based, ≥90% C, bulk density 1.30 g/cm³, crushing strength 14 MPa, thermal conductivity ≥3.0 W/(m·K), flow value 120–135%. For restoring the heat path from lining to cooler.

Choosing between them is a question of what the void is costing you. If it is a structural or refractory problem, use LB. If it is showing up as elevated shell temperature because thermal contact has been lost, use LD — because filling the gap with a non-conductive material would not fix that at all.

Flow Value Determines Whether It Works

An injection mix that bridges at the injection point fills nothing, no matter how good its properties are. Flow value and particle size grading are what let the material actually reach the void: LB and LD are graded to −1.5 mm and −1.0 mm respectively, with flow values matched to pumped delivery. Give us the void geometry and pump specification and we will grade accordingly.

What Void Filling Actually Achieves

Two things. It restores thermal contact so the cooling system can do its job, which shows up as reduced shell temperature. And it seals gas paths, stopping channelling behind the lining — which is both an efficiency loss and a safety concern on a pressurised vessel. Both are campaign-maintenance outcomes that avoid taking the furnace out of service.

Supply

Minimum order 5 metric tons, shipped in 7–14 days, with particle size grading adjusted for your pump and gap width. Batch test data covering chemistry, density, strength, flow value and particle size distribution ships with every lot, along with a written pumping procedure including recommended pressures.

Where This Grade Sits in the Lining System

Monolithic materials fail more often on installation than on specification. Water demand, mixing time, vibration and the first heat-up curve decide the outcome before the lining ever sees metal — which is why installation parameters are issued with the material instead of being left to site practice.

XZK supplies water-free injection mix as one zone of a zoned package rather than as a standalone item: the grades normally zoned alongside it — among them waterless taphole clay — are documented on the monolithic refractories page, and the vessel-level architecture — where each zone starts and ends, and which mechanism actually limits the campaign — is set out on the blast furnace page.

For a complete vessel programme built on this class of material, including the wear survey that set the zoning, see the MMK Magnitogorsk No.10 BF and 375 t ladle programme project reference.