Alberta inventory draw underway under elevated export margins

By mid-2025 the Alberta inventory story had turned from buffer build to draw. Argus, citing AER data, reported closing sulfur inventory at 11.66 million tonnes in July 2025, down more than 377,000 tonnes, about 3 percent year on year, and the lowest since May 2019. The item is at https://www.argusmedia.com/en/news-and-insights/latest-market-news/2731279-alberta-sulfur-inventories-fall-as-exports-climb. Export-process costs typically exceeding $150 per tonne meant draws required supportive Vancouver FOB. The $238 per tonne January-July average cleared that hurdle for many tonnes. Remelt into molten for rail to British Columbia and Alberta prillers, then solid loadout at Vancouver and Port Moody, was the physical path.

Heartland Sulphur's June expansion is the forming-side print of the same turn. Argus reported remelt capacity at the Edmonton-area terminal up 40 percent to 700 tonnes a day, from 500, with 1,500 tonnes a day planned by end-2026, triple the original 2021 commissioning rate. Seven hundred tonnes a day is about 255,000 tonnes a year if the plant runs every day. That is remelt, not Claus recovery. It turns block into molten that can rail south or into granules that can load west. It does not raise oil-sands sulfur production. Oil-sands Claus still tracks bitumen and sour-gas throughput.

Vancouver solid exports of about 2.04 million tonnes in January-July, up nearly 5 percent, are the harbour counterpart. Brazil 122,842 tonnes, nearly threefold. Cuba 122,467 tonnes, up 96,041. Australia 356,234 tonnes, up 5 percent. Indonesia down 23 percent. January-February had already printed 621,000 tonnes, up 17 percent, China 278,000, Australia 108,000, Indonesia 59,000. The stem started hot and diversified as the second quarter closed. Full-year VFPA would later confirm 3,507,428 tonnes, up 5 percent. Mid-2025 is the draw becoming visible, not the annual yet.

USGS Tampa went from $116 per long ton at the year open to $270 in early April, then eased to $252 in early July. Pacific solid averaging $238 through July and Florida molten at $270 then $252 are two hubs on one tightening year. CRU estimated a 1.9 million tonne global deficit. World production in the later MCS 2026 print was 84 million tonnes, essentially unchanged from 2024. US all-forms output slipped toward 8.1 million tonnes. Canada toward 5.0 million. The deficit is tradeable surplus. Licensed weekly assessment grids are not restated here.

Metals demand was cited as a medium-term floor even if phosphate affordability softened. CRU put nickel-related Indonesian acid demand near 16 million tonnes a year in 2025, from 3.5 million in 2021, sulfur-burnt acid the main domestic source, acid imports still about 1.0 million tonnes. Chinese sulfuric acid exports heading toward 4.65 million tonnes for the year, up 73 percent, competed with those elemental burners. A Vancouver Indonesia slip of 23 percent in January-July inside that acid boom is origin substitution, Middle East elemental and Chinese acid, not a dead autoclave bid.

Phosphate affordability is the other demand question. Apparent US consumption heading toward 9.1 million tonnes, down from 10.2 million in 2023, is a lighter Florida book. Chinese elemental imports for the year would print 9.61 million tonnes, down 3.5 percent, at $274 average, up 134 percent. Mid-2025 still has July's 1.094 million tonne Chinese import peak ahead by a few weeks. The $238 FOB and $270 Tampa prints are what those plants were paying, not yet the December 422,400 tonne chill.

Early-year tariff talk, threats of 25 percent duties on US-bound Canadian goods from early April, had encouraged alternative markets via Vancouver for some product historically railed as liquid into the United States, gradual because of logistics contracts. Brazil's triple is that diversion in tonnes. USGS still has Canada at 53 percent of US elemental imports for 2021-24. Molten rail did not vanish. Pacific solid found another door.

Alberta recovered sulfur still leaves mainly through the Vancouver stem. World tightness shows up there as stem tightness, remelt draws, and a Gulf-versus-Pacific basis. The draw is a stock release, not a rise in oil-sands Claus nameplate. UNCERTAIN remains the split between block remelt and reduced new pour inside the 377,000 tonne year-on-year change, a distinction that only facility-level AER products can refine. The public Argus item does not invent it. Forming saturation, not the remaining 11.66 million tonnes, is the speed limit on how fast Canadian inventory can answer a later Gulf hole.

BC Insight's later oil-sands note would put 2025 elemental output near 4.7 million tonnes, oil sands about 3.0 million tonnes or 63 percent, with about 1.5 million tonnes of blocked sulfur expected to remelt across 2025-2030 as additional remelt capacity commissions by end-2026. Heartland's 1,500 tonne a day end-2026 target is one piece of that timetable. Syncrude-area blocks remaining above 10 million tonnes until the November 9.9 million tonne print are the other piece. Mid-2025 is the first public AER-linked confirmation that the destock had started. Tampa at $252 in early July, after $270 in April, is the Florida pause inside the same week as the 11.66 million tonne provincial close. Two hubs, one remelt decision: if FOB and Tampa cover the $150-plus chain, pad becomes cargo. If they do not, pad stays pad. June's $238 Vancouver average said they did. Canada Action's later 2025 fact sheet, production above 4.43 million tonnes and $1.45 billion of export value, is the national value of that remelt-and-load year. The 11.66 million tonne print is the stock that made the value possible.

Key points

• AER via Argus: Alberta inventory 11.66 Mt July 2025, lowest since May 2019.
• YoY draw >377 kt (~3%).
• Export chain cost often >$150/t; 2025 FOB supported remelt.
• Vancouver H1 export pace already ahead of soft 2024 price year.
• UNCERTAIN: block remelt vs reduced Claus pour split in the draw.

30-day watchlist

• July AER close confirmation and any facility-level stock commentary.
• Tampa's post-April path after the $270/lt step (USGS later $252 early July).
• Heartland remelt utilization versus the new 700 t/d nameplate.
• Chinese July import print versus the spring run-rate.

Sources

• Alberta sulfur inventories fall as exports climb (Argus)
• AER Sulphur Balance Report catalogue
• Heartland ups re-melting capacity at Alberta terminal (Argus)

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Public reference summary. Weekly PRA assessments require a commercial license. Not investment advice.