Lignosulfonate Uses

In the concrete

The use of sodium lignosulfonate-based belonging to gidrofiliziruyuschim plasticizer in the manufacture of concrete and dry construction mixtures reduces the cost of components (cement) by 10-15%.
Also decreases the bundle of concrete mix and increasing its density, slowing the rate of cure. In the cement raw material or concrete mix additives are introduced lignosulfonate in the number of 0,15-0,20%, and superplasticizers must enter 0,5-2,0% by weight of dry cement. When replacing the lignosulfonate superplasticizer increases the strength of concrete by 20-25%, frost 3-4 times and dramatically lowered the cost of formula for adding a small amount of lignosulfonate, which is related to their adsorption on the surface of the solid phase. The use of lignosulfonate reduces the moisture of raw sludge, while maintaining its strength, which increases productivity of the furnace and reduces specific fuel consumption for clinker burning. With the use of intensifiers based on lignosulfonate enhanced performance grinding machines and the opportunity to replace expensive and scarce chemical products.

In the production of building materials

Due to its astringent, an adhesive and surface active properties, technical lignosulfonates are used in the manufacture of insulation and finishing panels (wood chip, wood and wool) as a hardening additive. Because as a hardening additive in the production are fairly scarce, expensive but also toxic phenol-formaldehyde, urea-formaldehyde resin, then mix in the manufacture of modified lignosulfonate (20-30%) and resin allows to obtain a combined binder.
Thus, the 50% reduces the toxicity of plates treated with supplements based on lignosulfonate. If you use 40 kg/m3 lignosulfonate in the manufacture of mineral wool, we can achieve a sharp reduction of consumption of toxic phenol and, consequently, a significant reduction in harmful emissions into the atmosphere. And the product in this case are more durable and moisture resistant.

In the production of expanded clay

The technical lignosulfonates can be widely used as an additive in the production of expanded clay gravel.
Expanded clay gravel most common artificial porous filler light and structural concrete are swelling clays by rapid firing in rotary kilns. Corrective additives introduced into the composition of the clay raw materials, can intensify the process keramzitoobrazovaniya, increase bloating raw materials, reduce density and increase the strength of the clay pellets.
Addition of sodium lignosulfonates of 12% by weight of oven-dry clay raw materials can get away with expanded clay pellets reduced density 0,380,43 g / cc.

In oil

In the oil refining and oil industry for drilling oil and gas wells lignosulfonates are used as a reagent to control the basic parameters of drilling fluids. Also, they are a component of gelling systems, which are low-viscosity solutions with pH 2.5-3.0. The formation of the gel leads to the redistribution of filtration flows and their better management, alignment profile pick-injection wells, restriction of water in the process, which in turn increases the recovery of oil. Using these systems lignosulfonates is possible by adsorbing properties of surface-active additives.
Just as in the mining industry, technical lignosulfonates are used to enhance various types of structures: mud pits, wells, etc.

In the mining industry

In the mining industry technical lignosulfonates are used as a flotation reagent – a substance that allows to incomplete wetting of the particle emissions, ie various mineral ores and allow himself the flotation process. That technical lignosulphonate are among the most expensive flotation reagents, and they know a few thousand, enhances the demand for reagents in the industry. In addition to the mining technical lignosulphonate used to strengthen the mud pits. They are added during the construction of various coatings and bases from the soil. Data structures reinforced bitumen emulsions, liquid bitumen or coal tar, resins, together with cement or lime, which in turn added to lignosulfonates.

In metallurgy

Widespread use of lignosulfonate as a binder for molding and core mixtures in foundry.
In the manufacture of molding and core mixtures for cast iron, nonferrous and steel castings lignosulphonates replace some scarce and toxic materials: phenol, urea formaldehyde and phenol-formaldehyde resin.
If you use binders based on lignosulfonate declining cost of suitable raw materials, increasing the strength of the rods, reducing their osypaemosti to 0,05-0,08%, lower temperature and reducing the duration of the thermal cure.
In non-ferrous metal lignosulfonates are used as a flotation reagent and binding reagent for briquetting of fine-grained materials. They are widely used as a binder and plasticizer in the production of pig iron, steel, sintering ore, acid etching and tempering the metal and so on.

In the chemical industry

In the chemical industries lignosulfonates are used in the manufacture of pesticides and seed dressing – as dispersant and stabilizer of suspensions in the manufacture of chemical plant protection.
Also, widespread use of lignosulfonate in food and fragrance industry. Obtained from lignosulfonate guaiacol and vanillin is used to give a specific smell.

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