Talcum powder processing plant Nigeria
INTRODUCTION: This project profile has been prepared aiming at production of talcum of powder in a small scale unit. Talcum powder is one of the beauty care products used in every sphere of life localities. The purpose to keep the skin dry to suppress the baby (sweat) order, to feel fresh due to fragrance, to improve the aesthetic look and so on.
MARKET POTENTIAL: The demand of Talcum Powder is increasing day by day at the pace of awareness of beautification. Purchase power of people, urbanization and advertisement in different medias. All groups of people use the product in all localities starting from very rural areas to cosmopolitan cities. At present talcum powder is available in various brands. There is always a need of a quality product at a reasonable price. Further talcum powder is having much demand for exports to the developing countries. Thus it is felt that this product would be in growing demand.
Manufacturing Process: Talcum powder is prepared taking talc as the basic raw material which needs to be very fine in structure. Deodorants are added to enrich antiseptic properties to the powder. Perfume develops the scent. A variety of fragrances are available for cosmetic products manufacturing. Many are derived from Natural essential oils and many are synthetic ones. Now a days synthetics are used to control the costs. The scent essentially to be disseminated through out the entire stock of talcum powder and therefore the perfume is to be mixed well with a small quantity of talc, then this is further mixed with the larger volume in the SS blender for a period of 1-2 hours. The stock is then filled in plastic containers and duly sealed. The containers are necessary to be labeled/printed with information as FDA norms.
Talc, which is a soft, hydrous magnesium silicate (3Mg0 4Si0 H 0), is used in a wide range of . . industries including the manufacture of ceramics, paints, paper, and asphalt roofing. The end-uses for talc are determined by variables such as chemical and mineralogical composition, particle size and shape, specific gravity, hardness, and color. There is no Source Classification Code (SCC) for the source category.
Over 95 percent of the talc ore produced in the United States comes from open-pit mines. Mining operations usually consist of conventional drilling and blasting methods.
Figure 11.26-1 is a process flow diagram for a typical domestic talc plant. Talc ore generally is hauled to the plant by truck from a nearby mine. The ore is crushed, typically in a jaw crusher, and screened. The coarse (oversize) material then is returned to the crusher. Rotary dryers may be used to dry the material. Secondary grinding is achieved with pebble mills or roller mills, producing a product that is 44 to 149 micrometers ( m) (325 to 100 mesh) in size. Some roller mills are designed to use heated air to dry the material as it is being ground. Hammer mills or steam- or compressed airpowered jet mills may be used to produce additional final products. Air classifiers (separators), generally in closed circuit with the mills, separate the material into coarse, coarse-plus-fine, and fine fractions. The coarse and coarse-plus-fine fractions then are stored as products. The fines may be concentrated using a shaking table (tabling process) to separate product containing small quantities of nickel, iron, cobalt, or other minerals and then may undergo a one-step flotation process. The resultant talc slurry is dewatered and filtered prior to passing through a flash dryer. The flash-dried product is then stored for shipment, unless it needs further grinding to meet customer specifications. The classified material also may be pelletized prior to packaging for specific applications. In the pelletizing step, processed talc is mixed with water to form a paste and then is extruded as pellets.
Talc deposits mined in the southwestern United States contain organic impurities and must be calcined prior to additional processing to yield a product with uniform chemical and physical properties. Generally, a separate product will be used to produce the calcined talc. Prior to calcining, the mined ore passes through a crusher and is ground to a specified screen size. After calcining in a rotary kiln, the material passes through a rotary cooler. The cooled calcine (0 percent free water) is then either stored for shipment or further processed. Calcined talc may be mixed with dried talc from other product lines and passed through a roller mill prior to bulk shipping.
The primary pollutants of concern in talc processing are particulate matter (PM) and PM less than 10 m (PM-10). Particulate matter is emitted from drilling, blasting, crushing, screening, grinding, drying, calcining, classifying, materials handling and transfer operations, packaging, and storage. Although pelletizing is a wet process, PM may be emitted from the transfer and feeding of processed talc to the pelletizer. Depending on the purity of the talc ore body, PM emissions may include trace amounts of several inorganic compounds that are listed hazardous air pollutants (HAP), including arsenic, cadmium, chromium, cobalt, manganese, nickel, and phosphorus.
The emissions from dryers and calciners include products of combustion, such as carbon monoxide, carbon dioxide, nitrogen oxides, and sulfur oxides, in addition to filterable and condensible PM. Volatile organic compounds also are emitted from the drying and calcining of southwestern United States talc deposits, which generally contain organic impurities. Products of combustion and VOC may also be emitted from roller mills that use heated air and from the furnaces that provide the heated air to the mill.
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