Lime slaking process and its impact on flotation efficiency and operation cost mohamad hassibi and imman singh chemco systems, l. December, 2003 revision 1 february 2009 the question most often asked is what is the best type of slaker. The answer to this question is often complex and depends on factors such as. Lime slaking process and its impact on flotation efficiency and operation cost mohamad hassibi and imman singh chemco systems the conversion of limestone to lime and its slaking with water, can be represented by the following reactions. The proven rdptekkem operating system takes input from load cells to precisely monitor the water weight and lime weight that are added to make a batch of lime. Home products tekkem lime feed systems tekkem slaker clean, accurate, simple, easy to maintain the rdptekkem slakers accuracy is made possible by the load cells ability to precisely add a predetermined amount of lime to a predetermined amount of water so that the chemical reaction of slaking can be performed under optimum conditions. The microstructure evolution of lime putty upon aging was investigated by slaking quicklime cao with an excess of water for 3, 12, 24, 36, 48 and 66 months. The ims lime slaker systems provide continuous high volume lime slurries up to 8,000 lbshour for industrial and municipal process ph adjustment, flocculation, and chemical reaction. Us9126863b2 method for temperature control in a slaker. The scrubber has an integral fan that keeps the lime slaking tank under a light vacuum which prevents dust and steam from escaping through overflow.
Caustx slaker causticizer texo consulting and controls inc. A pebble lime silo will dose dry lime to the sag mill feed belt. A torque sensor, mechanical or electronic, senses the torque required to drive the paddle shafts and compares this value with a preset value. An overview of lime slaking and factors that affect the process by.
Chemco quicklime slaking system is used to provide storage, dry feed, slaking of quicklime, and the delivery of the resultant hydrated lime slurry to the process. Apparatus is provided for mixing the solid and the liquid within the vessel at high speed and separate apparatus is provided for sweeping the bottom and sidewall of the. The active lime dosage is controlled to produce white liquor required for cooking the wood chip. In 2017, the treatment plant will add the city of university park to its system. High density systems diagrams courtesy of chemco systems. Lime slakers ball mill slaker by chemco systems lp ball mill slaker by chemco systems lp produce quality hydrated lime from commercial grade quicklime typical ball mill slaking process online service lime slaking ball mill of coal mi. Dry chemical feed systems series a758 plus lime slaking system the a758 plus lime slaker system provides reliable, efficient slaking of various grades of quicklime cao at a substantial savings over other slaking methods. The lime slakers and carbon dioxide feeder will be upgraded in 2016.
Caustx is a mechanistic model that delivers the production of strong white liquor. High density lime systems utilize hydrated lime and provide an extremely. Slakers are used to convert calcium oxide to calcium hydroxide for use in neutralization and ph control. Hydrated lime handling systems guideline development report.
Want a color copy, pdf, or poster of this article as it appeared in print. Our goal is to identify and respond to the needs of our customers. The superior pastetype slaking technology consistently produces a higher strength and more reactive lime slurry resulting in more efficient and more economical. A solid and a liquid feed inlet are disposed at the top of the vessel and an outlet is disposed at the bottom of the vessel. Efficiency grit removal and lime recovery system or in a ball mill slaker system while ball for the spray dryer fgd system the ball mill slaker is assumed for get a free quote leave a message. Admin publicationsan%20overview%20of%20lime%20slaking. Chemco supplied vertical ball mill slakers the union process cls attritor produce quality hydrated lime from commercial. Lime slakers manufacturers, service companies and distributors are listed in this trusted and comprehensive vertical portal. The first chamber is called the slaking chamber where lime and water are mixed.
Chemco supplied vertical ball mill slakers the union process cls attritor produce quality hydrated lime from commercial grade quicklime. Effect of slaking water temperature on quality of lime slurry by. An overview of lime slaking and factors that affect the. Chemco systems quick lime slaking systems by chemco. This could result in severe burns to anyone present at the time. Efficiency grit removal and lime recovery system or in a ball mill slaker system while ball for the spray dryer fgd system the ball mill slaker is assumed for get a free quote leave a message products and equipment from chemco systems. Vertical ball mill slakers there are two types of vertical ball mills on the market. A recent development on the lime slakers is the generation 3 scrubber unit that can cope with the steam and dust created when unslaked lime is dispensed and mixed in the closed tank lime slaker. Our pastetype lime slaker produces a higher strength and more reactive paste resulting in more efficient use of lime. Caustx helps prevent green liquor crystallization, overliming and weak white liquor. November 1999 revision 1 february 2009 abstract since lime slaking is an integral part of treatment systems in water, wastewater, air pollution, and process industries, its performance will influence the overall effectiveness. Lime slakers are typically suited for high volume lime users, creating a lime slurry on site with quicklime.
Our lime slakers are engineered to provide the correct temperature, watertolime ratio, and physical agitation required for processing a variety of lime grades. This uncontrolled feed of lime to the slaker will generate a tremendous amount of heat and steam causing an explosionlike reaction, which will spew boiling lime slurry 212 out of the slaker access doors. Dry chemical feed systems series a758 plus lime slaking system. This bibliography was generated on cite this for me on wednesday, march 11, 2015 ebook or pdf. Our lime slakers are engineered to provide the correct temperature, waterto lime ratio, and physical agitation required for processing a variety of lime grades. July, 2009 there is a recent debate regarding the impact heated slaking water has on the quality of the slaked lime. Lime handling system optimisation guidelines watersmart. The purpose of this paper is to clarify fact from fiction. In general most minerals develop a positivesurface charge under acidic conditions and negative charge under alkaline conditions.
Besides the lime slaker itself, sodimate can also supply the complete upstream storage and feed system. Lime slakers batch slaker by chemco systems chemco batch slakers. Lime slaker systems integrity municipal systems lime is one of the most common and economical chemicals used in the water and wastewater treatment process. Smelt for raw green liquor tta control, cgl tta for clarified green liquor, lqe lime quality estimator with ce soft sensors at causticizers, lime for reburnt and fresh lime dosage to slaker, and temp for slaker temperature control. This information is combined with data from a thermocouple and then used by the program. A slurry slaker generally uses an initial lime to water ratio of 1 to 3.
These are the sources and citations used to research equipment design of a lime slaker. An overview of lime slaking and factors that affect. Panelconversion to high density hydrate makedown worldwide. Ball mill slakers chemco systems ball mill slaker chemco systems. Filtration solutions and accessories for industry chemco is an environmentally conscious company that has provided costeffective industrial filtration solutions for our global customers for more than 50 years.
Dry chemical feed systems series a758 lime slaking system. The superior pastetype slaking technology consistently produces a higher strength and. The comprehensive directory provides access to full contact and ability information for sourcing professionals, engineers and researchers wishing to. Typically a slurry slaker, sometimes called a detention type slaker, is comprised of two chambers. Grinding action of the media eliminates the need for. A slaker includes a substantially straight, circular sidewall, a substantially flat bottom, and a top. Chemco systems lime slakers, lime handling systems. In most of the sulfide flotation systems the ph is controlled by regulating calcium hydroxide flow into the process. In this thesis a first principles model of a lime slaker was derived to model the slaker. Our mission is to differentiate ourselves by developing an uncompromising commitment to putting the customer. Other lime delivery options are detention slakers and vertimill slakers. An overview of lime slaking and factors that affect the process.
The comprehensive directory provides access to full contact and ability information for sourcing professionals, engineers and researchers wishing to get information on lime slakers. If lime slaking efficiency is removed from the economic analysis, the higher cost and reagent consumption of hydrated lime still justifies the installation of a slaker. The proportion of pebble lime to hydrated lime was varied to find the breakeven point between the two slaker systems. The cost of commercial bulk hydrated lime or prepared lime slurry solutions, however, becomes prohibitive for installations requiring a continuous, high volume supply, typically greater.
Chemco systems has established itself as a world leader in the design and manufacture of bulk chemical storage handling and feed systems for air and water pollution control. This debate has caused a lot of confusion in the industry. Raw clarifier, primary clarifier and two secondary clarifiers evoqua. Suzuki king quad manual suzuki king quad service manual lta 700 repair manual pdf download wallace and tiernan lime slaker manual. Ball mill slaker by chemco systems l p extremespellshome. Integrity municipal systems, llc ims the ims lime slaker systems provide continuous high volume lime slurries up to 8,000 lbshour for industrial and municipal process ph adjustment, flocculation, and chemical reaction. Method for batch wise slaking of burnt lime in a slaker, in which a lime slurry is produced with a great degree of fineness and long sedimentation time, comprising the following steps. Water quality used for lime mixing and mgo slaking phase is critical, and. A lime slaking and addition system can consists of two systems to control the ph in the rougher and cleaner flotation circuits. The tekkem slaker is fully automatic, requiring little or no regular operator attention.
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