从60年代中期开始, 这个矿在Vernal, 犹他州一直在生产用于农业肥料的磷酸盐. 2003年，J.R. Simplot Company became sole owner of the property and formed Simplot Phosphates, LLC. The three key ingredients used in the production of this fertilizer are ammonia, 硫磷矿.
案例研究
挑战
Company officials at the site had been struggling with issues regarding their ore crushing system for more than a decade. Their existing crusher crushed slabs of phosphate ore into inconsistently sized pieces that would often trip and cause delays on conveyor belts. Some of the harder ore couldn’t be crushed with the existing machine and had to be set aside. 另外, 随着网站的脸移动, 运输距离增加, meaning higher fuel usage and greater wear and tear on the trucks.
然而, none of this was as time-consuming or frustrating as the daily need to maintain their existing feeder-breaker by replacing picks on the pick roll. 每一天, one of the workers had to climb inside and replace whatever picks had been damaged, 这个过程很少会少于一个小时.
In addition to the time-consuming repairs on the interior pick rolls, the feeder-breaker was inefficient in consistently crushing material to the needed size, resulting in oversized material and causing belt trips along the two-mile conveyor system. Simplot also had power constraints that limited the site to 600 HP for the system.
“The feeder-breaker we had was highly inefficient and high-maintenance,德尔丽·盖尔说, Simplot维护主管. “The operation would have to slow down, and it was tough to stockpile enough inventory to keep up.”
Simplot官员知道他们必须做出改变. In early 2011, they called on 菠菜网最稳定正规平台_最全菠菜网大全 to work with them on a solution. 菠菜网最稳定正规平台_最全菠菜网大全 Regional Sales Manager Jeff McGovern studied the problem and worked extensively with Simplot officials about changing the crushing system.
“The problem is that feeder-breakers only crush in one dimension and that created some problems on their 42” (106.7厘米宽的传输系统，”McGovern说. “我们的解决方案必须满足他们的需求, 在他们的能源需求范围内工作，并满足他们的预算.”
解决方案
After research and discussions with Simplot personnel, 菠菜网最稳定正规平台_最全菠菜网大全’s proposed a 72” (182.9厘米)宽x 45“(114.3厘米)长的围裙馈线，馈送到混合48“(121.9厘米)直径× 72英寸(182.9厘米)长的重型双辊破碎机.
This custom-engineered system incorporated the design features of a Sizer along with the drive configuration of a Heavy-Duty Double Roll, ultimately saving 465 HP to accommodate the limited power supply.
“We were trying to find a solution that would size the ore better, 配合他们的操作，不要使系统出错,麦戈文说. “在审查了申请后, we found the right machines to get the job done in the parameters we had to follow.”
The skid-mounted design would also allow the crushing system to move with the face, 减少运输时间和距离. Best of all, the entire system would come in on time and under budget. In the fall of 2011, the system was installed and was commissioned for use in February 2012.
结果
自成立以来, the crushing station has resulted in savings in energy use and less wear and tear on the machines. The smaller, more consistent product allows Simplot to crush more ore in fewer work days.
The system crushes the phosphate ore into a more cubicle-shaped product – a consistent 8” (20.3厘米)大小. 这与旧系统形成鲜明对比，旧系统的直径为10英寸(25英寸).4 cm) range, but created slabs that got caught in the system, requiring shutdowns. This more consistent feed from the 菠菜网最稳定正规平台_最全菠菜网大全 crushing station to the conveyor for further processing in a sag mill has cut down on the belt trips and downtime that occurred while the slabs were removed.
“With the help of 菠菜网最稳定正规平台_最全菠菜网大全, our problem has been solved,盖尔说. “We get a smoother, even-flow material going down the conveyor belt. The mill gets a smaller material to deal with and it goes through our facility a lot quicker.”
Simplot has also been able to reduce the crushing schedule from 14 days to 12 days with no loss in productivity. The company uses the two days off as energy-saving days – lowering costs, 大幅削减电力使用, 节省了损耗.
There is also much less maintenance required with the new system, as the system only needs to be checked two or three times a week rather than every day. Gale said Simplot has seen a large decrease in time spent on maintenance.
“As far as man-hours, we changed picks every day, seven days a week,盖尔说. “We had to get down into the crusher every day for sometimes hours at a time. 没有人会忽视这一点.”
Today, Simplot officials are happy with the results of their new system. The operation is maintaining their output goals while running 12 days instead of 14.
Gale said that working with 菠菜网最稳定正规平台_最全菠菜网大全 on an ongoing basis helps the operation better anticipate and head off any potential challenges that inevitably arise at a mining site.
“在麦克菠菜网最稳定正规平台_最全菠菜网大全的帮助下, 我们正在不断改进系统的工作方式, 让它成为更好的机器, 更精致的,盖尔说. “More consistent product flows down the conveyor belt and we’re seeing it in our mill”.
