Living stones (Lithops spp.), also known as pebble plants, are unusual little succulents that have evolved to look like the pebbles and rocks that litter their native habitats in Africa. These plants hug the ground and grow extremely slowly. Theyre best planted in the spring or fall, as the plants enter a dormant state and arent actively growing during the hot summer months and the winter months. The plants within this genus generally consist of a pair of thick leaves with little if any stem above the soil. Beneath the soil is the stem and fairly long roots.A new set of leaves appears in the spring, and the old leaves dry up and fall off. Plus, all species within this genus have daisy-like flowers, which typically emerge from between the leaves in the fall or winter.
Living stones are quite interesting plants to grow, thanks to their unique appearance. They are also very low-maintenance plants. But they have some specific environmental needs that you must abide by to have success with their growth.
These plants need as much light as possible. That means if youre growing them indoors and dont have a bright window, you might need to invest in a supplemental artificial grow light for them. Moreover, proper watering is probably the most crucial part of living stones' care. These plants are highly tolerant to drought, and too much water can easily kill themespecially if it promotes rot or fungal growth. Fortunately, living stones arent prone to many diseasesor pests. So they should thrive if you take a largely hands-off approach to their care.In fact, for around half of the year, you likely won't have to do anything for your plants besides monitor them to make sure they're staying healthy.
Living stones prefer full sun year-round, meaning at least six hours of sunlight on most days. When growing them indoors, place them by your brightest window, with a southern or eastern exposure being preferable. Insufficient light can cause elongated leaves and poor leaf coloring.
Living stones must be watered on a seasonal schedule that mimics the rainfall they would get in their natural habitat. Dont water over the winter when the plant is dormant. Then, once the new leaves begin forming in the spring, water whenever the soil dries out just enough that the soil becomes slightly moist. Pause watering again in the summer during the other dormant period. But resume watering in the fall just before the plant is ready to flower. If the leaves start to completely shrivel up while the plant is dormant, you can give it a very small amount of water to plump them up again.
Living stones can tolerate heat well and can survive temperatures down to 50 degrees Fahrenheit. They do fine in typical room temperatures between 65 and 80 degrees Fahrenheit. Humidity usually isnt an issue as long as the soil doesnt remain moist for long periods and there is good air flow around the plants.
Even though these plants only rise about an inch above the soil, provide them with a pot thats around 3 to 5 inches deep. Thats because they have long taproots that stretch far down into the soil. The pot should also have ample drainage holes. An unglazed clay pot is ideal because it will allow excess water to evaporate through its walls.
You likely wont have to repot your living stones for many years as they grow so slowly. If you have several in a pot that are becoming cramped, carefully dig up each plant you want to repot, keeping its roots intact. Then, place it in a new pot thats slightly deeper than the length of its roots, filling around it with fresh cactus potting mix.
All the Crushing Plant equipment is interlocked, except for the sump pump, and therefore, the plant must be started from the fine ore bin back. The dust collector and scrubber bottoms pump are interlocked together, and must be started prior to other equipment. The sump pump should be placed in AUTO. The drives should be started in this order:
Normal Crushing Plant Operation After the crushing plant has been brought up to normal operating conditions the operator should attempt to even out the feed to the jaw crusher to the design tonnage of 60 mtph. This is achieved by ensuring that the feed to the crusher maintains an essentially full chamber without ore spilling out. Adjust the speed of the apron feeder with to increase or decrease the feed rate to the jaw crusher and ultimately to the crushing circuit.
The product from both crushers should be visually checked to ensure that each crusher is producing the desired product. If the jaw crusher product increases in size, the cone crusher may become overloaded. Similarly, if the cone crusher product increases in size, the circulating load around the cone crusher will increase, consequently, increasing the load on the cone crusher and decreasing throughput.
The Crushing Plant operator must monitor the cone crusher power draw displayed on the cone crusher ammeter. The ammeter should show no major fluctuations and should read approximately 100 amps. An excessively high power draw on the cone crusher indicates the cone is being overloaded, which may be due to a high feed rate or a blinded screen.
The operator must pay close attention to the cone crusher lube system. A low pressure alarm will sound if there is an abnormally low oil pressure. If this alarm sounds, the crusher will shut down after a timed delay. If the crusher is allowed to operate longer than 2 minutes after the loss of oil pressure, serious damage to the crusher may result. If the pressure gauge indicates pressure above the normal operating pressure, shut down the cone crusher and investigate the problem. Likewise, a high temperature alarm will sound if there is an abnormally high oil temperature in the oil return line. Shutdown the crusher and investigate if the temperature of the oil pipes seems excessive. Low oil pressure or high oil temperature may be caused by several conditions;insufficient oil supply in the lubrication system, a broken oil feed line, oil pump failure or excessive bearing wear in the crusher. Either condition must be thoroughly investigated as to the cause of the alarm.
Although there is no variable control of the beltconveyors in the Crushing Plant, the operator should regularly check conveyor discharge chutes to ensure there is no undue buildup of material. This is especially important if the feedmaterial is clay-like or excessively wet.
The Crushing Plant operator must ensure that the dust scrubber has an adequate supply of reclaim water and monitor flow-meter to ensure that the proper amount of water isbeing recirculated through the scrubber. Under normal conditions, the dust scrubber requires a minimum recirculation of 8 to 10 cubic meters per hour. A lower flowrate will ultimately cause excessive wear on the scrubber and a higher flowrate is a waste of reclaim water and may hinder operation of the grinding circuit.