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Leping Jiejing Bleaching Clay Co., Ltd

Please contact: Mr.Zhou -Sales Manager

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Address: Xihu Village, Wukou Town, Leping, Jingdezhen, Jiangxi 333300, China

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The development prospects of activated clay
Updated 2016-09-22 By:Leping Jiejing Bleaching Clay Co., Ltd  Visits:628

In the past, people only know using bentonite as raw material of activated clay, actually otherwise, with characteristics of clay mineral can be used as a raw material of activated clay soil, such as montmorillonite clay, montmorillonite clay, sepiolite clay, attapulgite clay, etc。

Kaolinite clay or kaolin clay (kaolin), is a family of kaolinite mineral as the main composition, texture, pure fine clay, appearance is white, such as shallow ash is lubricious, containing impurities was yellow, grey, black, etc. Dense clumps or loose earthy, soapy, hardness is less than the nails. The proportion of 2.4 to 2.6, dry after water imbibition. Refractoriness of up to 1770-1790 ℃. Low plasticity, small caking property, good insulation and chemical stability.

Pure kaolinite calcined after color white, the white degree can reach 80% 90%. Montmorillonite clay, also known as bentonite, bentonite rock, spot, is a kind of montmorillonite as the main mineral composition of fine clay. Look white, pink, shallow gray, light yellow, when impurity contamination can be a sage green, purple, brown and other dark color. Loose earthy tarnish, dense block is waxy luster. Hardness is 1 to 2, soft. Block or earthy, slippery feeling. The proportion of 2-3. After absorbing water volume expansion, water quantity for the size of 8-15 times. With high plasticity and good cohesiveness, suspension and gelation shaped in aqueous solution, but also has the characteristics of cation exchange. Sepiolite clay is a kind of sepiolite as the main component of clay. Appearance of brown spots, dark gray, gray color, the soil block, soft and light, hardness is 1 to 2, the proportion of 2.4 to 2.65, with viscosity and plasticity, hand touch of the slippery feeling. After adding water can tune into a paste, dry of hammer can be used after leaving the hammer. Attapulgite clay is a kind of attapulgite as the main component of clay, appearance and - like clay, especially with montmorillonite clay is very similar, and both often symbiosis. Its field identification mark is appearance is earthy, show its, duck egg blue, grey, soil is exquisite, have slippery feeling, viscosity and plasticity when wet, dry after qualitative light, narrow. And put it into the water, simmering and collapse are scattered into pieces, but not inflation. And performance of attapulgite clay, sepiolite clay has a thermal stability, salt resistance and high adsorption and decolorization ability. Hunan sea bubble stone become activated clay, zhejiang found b axis disordered kaolinite can also be activated clay, the successful development in shandong with water purifier residue as the raw material of activated clay. Such activated clay materials is more widely. But we say normally activated clay refers to using bentonite as raw material of activated clay.

Sea bubble stone activated clay, go through selection, such as acid activation process can be made into activated clay. Water is selected, liquid-solid ratio is 5 ~ 10. Water concentration after the suspension of 0.5% plus 0.5% of sulfuric acid or hydrochloric acid, boiling for 30 min, then filtering, washing, drying, grinding for products, namely decoloring rate reached to 93%, more than the requirement of national standard decoloring rate 90%. Of concave and convex clay has a reputation for great thousand soil, ten thousand USES yarrow, concave-convex rod activated clay (no acid activated clay) has the high decolorization rate, excluding the residual acid, etc. Bentonite as raw material of activated clay processing production of bentonite as raw material of activated clay processing and production methods are all wet, all dry, half wet, vapor phase method, calcination method, etc.

All traditional wet method is a mixture of bentonite, sulfuric acid, water under the condition of the stir heated to 100 ℃ after activation for a period of time after washing, drying, crushing a quick product。 Big weakness is the method of acid consumption, resulting in washing water consumption is big, serious environmental pollution and high cost。 Steps in the order: dressing; Beating the original soil, sand and water purified and emissions; Adding acid and water, and in 80 ~ 100 ℃ under the activation of the 10 to 30 min, at the same time to 1000 r/min stirring; Suction, filtrate circulation to beating purification steps, residue to the next step; Drying and crushing; Product testing, packaging。 Traditionally, the dry process production technology is a small amount of sulfuric acid and water and bentonite mixed fully mixing, placed a period of time, and then drying, break for a quick finished。 Although this method reduce the use amount of acid, no waste water discharge and so on environmental pollution, but the product quality is low, greatly limits its application。 Steps in the order: dressing; Adding acid and water in extrusion is often WenGu phase activation; Dry grinding; Product testing, packaging。 Half is a small amount of sulfuric acid production by wet process fully mixing, when mixed with water and bentonite activation (place) at certain temperatures for a period of time, and then adding acid and water in the second step is the activation。 Steps in the order: dressing; Adding acid and water in extrusion is often WenGu phase activation; Add water and acid activation; Rinse; Filter; Drying and crushing; Product testing, packaging。 Half wet production process is well solved all the problems existing in the wet and dry all, simple process, low cost, high product quality。

In general, a half wet production process than the traditional process of acid consumption reduced by half to two-thirds (1/2 ~ 2/3), water consumption and lower 1/2 ~ 2/3, less waste water, a little processing, no environmental pollution, low cost, in the same situation, product quality decoloring force about 30% than that of the traditional methods. Vapor phase method technology is under a pressure hot vapor to water, acid and earth half dry mixture, mix well particle state under the static by vapor phase, liquid phase and solid phase of fierce between half dry granular acidification acidification reaction, after rinsing processes such as the preparation of activated clay is a new technology. The technology of the existing wet clay of legal system and dry and calcination method production technology of activated clay method sets the integration of the advantages of technology, has a wide practical value, for clay production in China provides a kind of new technology. The technology with traditional wet method compared activated clay technology has the following advantages:

(1) with acid and water consumption reduced by about 50%, respectively, to shorten the production cycle 1/2 ~ 1/3; (2) the light pollution, and easy to management; (3) covers an area of less, high utilization rate of equipment, less investment, quick effect and closely with wet method with the existing process and equipment. According to different process, activated clay can also be combined aluminum sulfate, sodium silica alumina white, gypsum, etc. (1) of the original soil of bentonite has certain selectivity, not for all different types of bentonite can produce the decolorization rate of 90% or more efficient activated clay, which other types of bentonite can only produce the decolorization rate of 80-85% or more ordinary activated clay or half efficient activated clay. Activity indicators are temporarily short of H (highly active degree of activated clay) on the activity. Thus the scope of its use is limited by some.

(2) the acid waste water treatment, the dosage of lime is too big.

(3) oil absorption rate。 Activated clay decoloring usage for heavy oil by 2% to 5%。 Use clay to decolorizing of oils and fats, inevitably there is oil, entrainment is commonly activated clay amount 20% - 20%, thereby increasing the consumption and cost。 At present, the activity of a few enterprises using the leaching method from waste clay in oil separation, but after the separation of oil due to the effect of clay, for black color, can't decoloring a good color。 As a result, the domestic oil decoloring department hope oil absorption rate of activated clay。 Activated clay by his great specific surface area, adsorption ability, decolorizing efficiency; Active degree is low, not with oil and other chemicals in chemistry; Used for liquid decolorizing filtration speed, lower residual liquid rate, such as edible oil decoloring, sugar decolorization; After bleaching liquid transparent clear, stable quality, no smell, no color, no acid; After using the product, through appropriate processing can undertake secondary use, not cause environmental pollution, etc。 Series of products advantages and are widely used in the adsorbent, clay grain, no carbon carbon paper with chromogenic agent。

(a) adsorbent

Level 1, edible oil decoloring agent products are widely applied in all kinds of vegetable oil, animal oil and mineral oil decolorization, such as soybean oil, rapeseed oil, peanut oil, cottonseed oil, sunflower oil, palm oil, coconut oil, castor oil, tea oil, corn germ oil and fine bran oil, sesame oil, tung oil, safflower oil, etc。

Level 2, sugar decolorizing decolorizing products rich in magnesium aluminum silicate purification product of sugar, its colour and lustre, reducing sugar content, PH value, sulfite ion content, chloride ion content, protein content, temperature and sugar content of calcium and magnesium ions achieves the current industry standards, such as saving the decolorization processing costs by about 60%. After decolorizing filter cake can make mixed feed, reducing environmental pollution, realize the comprehensive utilization.

Level 3 environment, deodorant products product has good adsorption odor function, can eliminate the fridge, pet the peculiar smell of the bedroom, bathroom and other places。

(2) of clay particles

(3) no carbon carbon paper with chromogenic agent Economic benefit analysis of bentonite raw material price is about 250 yuan/ton, ordinary activated clay domestic market price of about $1200-1500 / ton.

According to the scale of 10000 tons/year of activated clay estimate, the equipment and infrastructure investment is about 300-300 yuan, costs 600-700 yuan/ton, annual output value 14 million yuan, profit tax of 6 million yuan. If the supporting production of white carbon black, 4 a molecular sieve, such as more efficient. Bentonite is our country the advantage of resources and reserves in the world, but the development and utilization of a late start, deep processing of backward technology, poor product quality, production scale is small, the domestic oil decoloring departments with the high quality activated clay is imported from abroad. The activated clay production capacity has reached more than 4 million tons/year, and our country is only around 200000 tons/year. Whether the statistics, our country in recent years, the demand for activated clay is increasing at a speed of 7-8% a year. Through historical analysis of the domestic market, in oil refining is a large market, according to industry experts predict that China's annual output of various vegetable oils is about 8 million tons, 500-6 million tons of oil imports, the refined oil accounted for half of the total, about 6.5 million tons. Therefore, the production efficient activated clay wide prospect of market.


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Address:Xihu Village, Wukou Town, Leping, Jingdezhen, Jiangxi 333300, China   Technical support:B6910B80D56C3C89F47588F821D3136F.JPG

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