# American Tungsten & Antimony produces Grade A antimony ingot

Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/american-tungsten-antimony-produces-grade-a-antimony-ingot--b95aade3-89b4-48cd-b78e-cf9a932319dc

Original source: https://stockhead.com.au/resources/american-tungsten-antimony-produces-grade-a-antimony-ingot/

Publisher: stockhead

Original announcement: 2026-10-13T20:05:23.000Z

Analysis by Minestarters Atlas

Atlas analysis published: 2026-10-13T21:17:24.042Z

Atlas analysis updated: 2026-10-13T21:17:24.042Z

- Company: American Tungsten & Antimony

- Ticker: AT4

- Exchange: Unavailable

- Region: Nevada

- Primary commodity: Antimony

- Secondary commodities: None reported

- Document categories: Metallurgy

- Extracted: 2026-10-13 21:17:24 UTC

Narrative sentiment: 0.80 · Bullish

## Minestarters Atlas summary

American Tungsten & Antimony \(AT4\) has produced antimony ingot with 99.8% purity at its Del Sol refinery in Nevada, meeting ASTM B237 Grade A specifications. Independent testing confirmed the high-purity results, advancing the company's US-based mine-to-metal critical mineral strategy.

Reasoning: The production of high-purity Grade A antimony ingot validates the company's processing capabilities and critical mineral supply chain potential.

- Positive factor: Achieved ASTM B237 Grade A purity \(99.8%\)

- Positive factor: Exceeds Regulus II commercial grade threshold

- Positive factor: Independent testing by NSL Analytical Services

- Positive factor: Demonstrates successful mine-to-metal supply chain

Facts used in scoring: 2

## Classification and evidence

**High Recovery**

Polarity: positive

Definition: Recovery at or above the exceptional band for the commodity and processing route.

Why it applies: The purity achieved \(99.8%\) is exceptional for the commodity and meets the highest industry standard.

Evidence · text

> AT4 produces ingot grading 99.8% antimony, meeting ASTM B237 Grade A

**Mill Route**

Polarity: neutral

Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\).

Why it applies: The process involves electrowinning and fire refining at a refinery.

Evidence · text

> optimising electrowinning conditions and fire refining

**Multi-Domain Tested**

Polarity: positive

Definition: Variability across ore domains \(oxide, transition, fresh\) has been addressed.

Why it applies: 2 distinct composites were tested

## Extracted facts

Stored fact records: 2. Some facts used in scoring do not have a stored record.

## Metallurgical Results (2)

### electrowinning and fire refining

[Link to this fact](https://atlas-staging.minestarters.com/news/american-tungsten-antimony-produces-grade-a-antimony-ingot--b95aade3-89b4-48cd-b78e-cf9a932319dc#fact-metallurgical-facts-0)

Del Sol · antimony

#### Identity

- Project: Del Sol
- Commodity: antimony
- Region: usa\_nv
- Reported Region: Nevada
- Ticker: AT4

#### Test Work

- Program Status: detailed
- Test Type: electrowinning and fire refining
- Processing Route: electrowinning and fire refining
- Sample: ASTM B237 Grade A ingot produced at Del Sol refinery

#### Recovery

- Head Grade: 99.8
- Head Grade Unit: %
- Conc. Grade: 99.8
- Conc. Grade Unit: %

#### Lab

- Laboratory: NSL Analytical Services

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-10-13T00:00:00.000Z

Reasoning: 99.8% purity meets the highest commercial standard for antimony.

- Positive factor: Meets highest purity standard \(Grade A\)

- Positive factor: Exceeds Regulus II threshold

Evidence · text

> AT4 produces ingot grading 99.8% antimony, meeting ASTM B237 Grade A

### electrowinning and fire refining

[Link to this fact](https://atlas-staging.minestarters.com/news/american-tungsten-antimony-produces-grade-a-antimony-ingot--b95aade3-89b4-48cd-b78e-cf9a932319dc#fact-metallurgical-facts-1)

Del Sol · antimony

#### Identity

- Project: Del Sol
- Commodity: antimony
- Region: usa\_nv
- Reported Region: Nevada
- Ticker: AT4

#### Test Work

- Program Status: detailed
- Test Type: electrowinning and fire refining
- Processing Route: electrowinning and fire refining
- Sample: Four other ingots tested

#### Recovery

- Head Grade: 99.5
- Head Grade Unit: %
- Conc. Grade: 99.5
- Conc. Grade Unit: %

#### Lab

- Laboratory: NSL Analytical Services

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-10-13T00:00:00.000Z

Reasoning: Secondary ingots achieved high purity \(99.5-99.6%\) but did not reach Grade A.

- Positive factor: Grades remain within high-purity commercial range

Evidence · text

> Four other ingots returned grades of 99.5% to 99.6% antimony

## How Atlas produces this analysis

Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.