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Standing above the cavern in the Gilman mine where the ball and rod mills are housed. The mills are on an incline for gravity feed down to the loading docks. At the center right of the photo, steel rods are stacked for use in the rod mill.
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The main shaft house for the New Jersey Zinc Co. is the tall building at far right. The stacked lumber is for mine stoping. This view is facing north.
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At 16 level, the ore train would dump rock into the large pit (Grizzly) at the bottom of which was located a jaw crusher. The crusher would send the ore into the ball mill and rod mill where the ore was pulverized to a fine powder. Inside the ball mill, there would be ore and steel balls, approximately 10 in. in diameter. As the mill rotated, the ore was crushed by the balls. Eventually, the balls would wear down and Bob Riggle remembers his dad...
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Floation area for the zinc ore at Gilman. Flotation tables were used to seperate the zinc and lead from the waste in the mining process. Further processing separated the lead and the zinc.
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The dryer building for zinc is at the far right. The zinc slurry would be heated and dried, leaving a very fine zinc powder. The powder was shipped in sealed box cars as it was so fine it would blow away in an open car. The rail line for shipping runs through the Eagle River Canyon (Belden area) so the final products for shipping were finished at this level.
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Platform leading to the soda ash machine at the Gilman Mine. Soda ash (also called washing soda, sodium carbonate Na2CO3) was one of the chemicals used to clean the ore. The large pipe on the left is for ventilation of the soda ash work area.
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At right is the ball mill. At left is the rod mill. The mills are on an incline for gravity feed down to the loading docks. At the center right of the photo, steel rods are stacked for use in the rod mill.
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Dick Sayers (left) and John Skinner adjusting controls at the pump station on 20 level at the mine in Gilman.
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Signal pulleys to let the hoistman, who operated the cage, know when to raise or lower the cage.
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Air operated mucking machine. The scoop goes over the mucking machine and empties the ore into the car behind. Miners also used these cars to move mining timbers throughout the mine.
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Mucking machine picking up a load of ore at Gilman. The machine ran on rails and pulled ore cars behind for loading.
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Cable used to raise forge door.
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Inside the mill at the Gilman Mine. Chemicals are stored in pallets in the left forefront and a battery operated fork lift is parked in the center background. The soda ash mixing machine area is at the top of the platform. Soda ash (also called washing soda, sodium carbonate Na2CO3) was one of the chemicals used to clean the ore. The large pipe on the left is for ventilation of the soda ash work area.
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Staging area in the mill at Gilman for the chemicals used to process the mined ore. The fork lift was used to lift pallets of the chemicals for use in the mixing machines. [Similar to 2007.008.072]
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Part of the soda ash mixing machine at the Gilman Mine. Soda ash was used in processing the ore along with copper sulfate. An electric motor to power the mixer sets atop the mixing bucket.
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A mine conveyor used for transporting the zinc ore from level to level and to the crusher in the mine. Conveyors were used extensively in the mine. [related to photo 2007.008.067]
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Mine stope showing the reinforcing timbers used. On the left side of the picture is a thermometer used to monitor temperatures.
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18) Piping
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Underground pipes used to move water and chemicals for the ore milling processes. A group of fans is seen in the bottom background, providing some of the ventilation in the mine at Gilman.
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Platform leading to the soda ash machine at the Gilman Mine. Soda ash (also called washing soda, sodium carbonate Na2CO3) was one of the chemicals used to clean the ore. The large pipe on the left is for ventilation of the soda ash work area.
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Fork lift loading soda ash onto a platform for use in the soda ash machine. The fork lift was battery operated.