Impact crusher blow bar replacement for stibnite 95 tph in Oruro Bolivia

For antimony mining operations in Oruro, Bolivia – one of the country’s historic mining regions with significant stibnite (Sb₂S₃) deposits – an impact crusher is widely used for secondary crushing. Stibnite is soft to medium‑hard (Mohs 2‑2.5) but can be brittle. Blow bars are the most frequently replaced wear part in an impact crusher. Knowing the correct procedure for impact crusher blow bar replacement for stibnite 95 tph in Oruro Bolivia helps you minimize downtime, maintain product shape, and protect the rotor from damage. OCP Mechanical Company, a factory‑direct manufacturer with over 40 years of experience, supplies high‑quality blow bars for Type I impact crushers, backed by 24/7 online support.

Note: Product data are constantly updated; the latest specifications should be confirmed with our online customer service.

When to replace blow bars for stibnite crushing

Stibnite is not highly abrasive, but it can contain quartz or pyrite gangue that accelerates wear. Signs that you need impact crusher blow bar replacement for stibnite 95 tph in Oruro Bolivia include:

• Reduced throughput (e.g., from 100 tph down to 80 tph at the same crusher setting)

• Increased power draw (motor current spikes)

• Poor product shape or coarser product

• Visible rounding or loss of blow bar profile (more than 50% of original height)

For stibnite with low abrasion, blow bars may last 300‑500 hours. With hard gangue, life may drop to 150‑250 hours. Regular inspection every 100 hours is recommended. Many Bolivian antimony plants have reduced unplanned downtime by scheduling blow bar changes based on hours rather than waiting for failure.

Step‑by‑step blow bar replacement procedure

Follow this guide for a safe and efficient impact crusher blow bar replacement for stibnite 95 tph in Oruro Bolivia:

Step 1 – Shut down and lock out power
Isolate the crusher and all associated conveyors. Lock out the electrical disconnect and verify zero energy. Wait for the rotor to come to a complete stop.

Step 2 – Open the crusher housing
Use the hydraulic opening system (if equipped) or remove access panels. Allow the crusher to cool if it has been running.

Step 3 – Rotate the rotor to access the blow bar wedge
Use a barring device to turn the rotor manually. Position the blow bar so that the wedge is accessible.

Step 4 – Remove the wedge bolts and wedge
Loosen the locking wedge bolts gradually. Use a hammer to tap the wedge loose. Do not use excessive force. Remove the wedge and set it aside.

Step 5 – Lift out the worn blow bar
Slide the blow bar out of the rotor slot. Clean the slot and check for damage or burrs.

Step 6 – Install the new blow bar
Insert the new blow bar (ensure it is the correct weight and profile). Reinstall the wedge and tighten bolts to the specified torque (typically 150‑250 N·m, depending on crusher size).

Step 7 – Repeat for each blow bar
Replace all blow bars in the set to maintain rotor balance. Never mix old and new blow bars.

Step 8 – Close the housing and test run
Close the crusher housing. Run the crusher empty for 2‑3 minutes, listening for unusual noise or vibration. Check that the rotor rotates freely.

Step 9 – Resume production gradually
Feed material at 50% rate for 10 minutes, then increase to full capacity while monitoring power draw.

All price information in this article is for reference only; contact our team for a current, site‑specific quote.

A set of blow bars for a 95 tph impact crusher ex‑works typically ranges from $800 to $1,500 USD, depending on alloy (Cr20% or Cr26%). Shipping to Bolivian ports (Arica or Iquique via Chile, then overland) adds $300‑$600.

Common mistakes to avoid

• Mixing old and new blow bars – Always replace all blow bars as a matched set. Uneven weight causes severe vibration and bearing damage.

• Over‑tightening wedge bolts – Follow torque specifications. Over‑tightening can crack the rotor slot.

• Ignoring rotor balance – After replacement, verify that the rotor is balanced. A simple vibration check can prevent bearing failure.

• Using the wrong alloy – For stibnite with low abrasion, Cr20% is sufficient. For stibnite with high quartz content, Cr26% is recommended.

Keep a spare set of blow bars and wedge bolts on site to avoid waiting for deliveries.

How to extend blow bar life in stibnite crushing

To reduce the frequency of impact crusher blow bar replacement for stibnite 95 tph in Oruro Bolivia, follow these operational tips:

• Remove fines before the crusher – Use a vibrating grizzly feeder to scalp out material below 10‑15 mm. Fines cause unnecessary abrasive wear.

• Maintain a choke‑fed condition – A full crushing chamber reduces impact shock on blow bars.

• Rotate blow bars (if reversible) – Every 100‑150 hours, rotate blow bars to use both wear edges. This can extend life by 30‑50%.

• Control feed size – Avoid oversize lumps (>150 mm) that cause severe impact damage.

• Use the correct rotor speed – For stibnite, 400‑500 rpm is sufficient. Higher speed increases wear without significant shape benefit.

OCP supplies reversible blow bars and provides weight‑matched sets for drop‑in replacement.

Why OCP is your trusted blow bar supplier for stibnite in Bolivia

Mastering impact crusher blow bar replacement for stibnite 95 tph in Oruro Bolivia keeps your antimony plant running profitably. OCP Mechanical Company has four decades of experience in wear parts for soft and abrasive materials. Our 24/7 online team helps with alloy selection, torque specs, and installation guidance. We keep common blow bars in our regional warehouse for fast delivery to Bolivia. We invite you to request a no‑obligation quote.

For a no‑obligation consultation on impact crusher blow bar replacement for stibnite 95 tph in Oruro Bolivia, simply click the live chat icon on this page. Our online customer service team is available 24 hours a day, 7 days a week, to provide free price quotes, alloy recommendations, and installation advice – helping you keep your impact crusher crushing efficiently.