Let’s get to know the nature of coal slurry additives

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　　Lignosulfonate, also known as sulfonated lignin. 　　It is a by-product of sulfite-process paper pulp and is a linear polymer compound. Lignosulfonates are soluble in aqueous solutions at various pH values, but insoluble in organic solvents; their functional groups are phenolic hydroxyl groups. It is usually a yellow-brown solid powder or a viscous paste. It has good diffusivity and is soluble in water. 　　It is produced by concentrating sulfite pulp waste liquid, and then using precipitants such as lime, calcium chloride, and basic lead acetate, through processes of precipitation, separation, and drying. Primary uses: It is used in processes such as oil field drilling muds, oil well fracturing, and tertiary oil recovery to improve oil recovery rates. It can be used in industrial water treatment as well as in the leather industry. Its use in the electroplating industry makes the electroplated surface brighter. It can also be used as a dispersant, as a water-reducing agent in concrete, as an additive in gypsum board production, as an additive in pesticides, as a dispersant in printing and dyeing, and as an anti-wear agent for rubber. It can also be used as a raw material or intermediate for producing dyes, vanillin, and tannins, replacing the combination of 50% phenol and formaldehyde used to synthesize plastic products. Usage: As a concrete water reducer, it is used at a rate of 0.2-0.3% of the cement weight; this can reduce water usage by 10-15% or more, improve the workability of concrete, and enhance the quality of the construction. Used in summer to suppress loss of slump; it is generally used in combination with high-efficiency water reducers. 　　It is used as a flotation agent in mineral processing and as a binder for smelting ore powder. In the metallurgical industry, calcium lignosulfonate is mixed with ore powder to form ore powder balls; after drying, these balls are placed in a furnace, which helps to increase the recovery rate in smelting. 　　Refractory materials: When manufacturing refractory bricks and tiles, the use of calcium lignosulfonate as a dispersant and binder improves workability, and it also has beneficial effects such as water reduction, strength enhancement, and crack prevention. 　　Ceramics: Its use in ceramic products helps reduce carbon content and increase the strength of the green bodies; it also reduces the amount of plastic clay required. The slurry has good flow properties, which increases the yield of finished products by 70–90%, while the sintering time is reduced from 70 minutes to 40 minutes. 　　Others: Calcium lignosulfonate can also be used as a refining aid, in foundry processes, as a dispersant for water-coal slurry, in the production of pesticide wettable powders, for pressing briquettes, to control dust on roads and in soil, as a filler in leather tanning, for granulating carbon black, and as a binder in feed. Usage example: Sodium lignosulfonate is an anionic surfactant, appearing as a brownish-yellow powder. It is mainly used for the dispersion and filling of disperse dyes and reactive dyes. It possesses good dispersing properties, thermal stability, and the ability to remain dispersed at high temperatures. It provides effective grinding assistance, causes minimal contamination of fibers, and has little reducing effect on azo dyes.
Usage methods:
1. Sodium lignosulfonate is primarily used for disperse dyes and reactive dyes; it can also be used as a diluent for acid dyes and as a pigment dispersant. 　　2. As an efficient concrete water reducer, it outperforms calcium lignosulfonate and is suitable for use in projects such as culverts, dams, reservoirs, airports, and highways. 3. It is used as a cathode anti-shrinking agent in lead-acid and alkaline batteries, improving the battery’s discharge capacity at low temperatures as well as its service life ； Used in electroplating electrolysis to ensure a uniform coating without dendritic patterns ； Used as a tanning agent in the fur industry ； Used as a descaling agent on boilers ； Used as advanced flotation agents in metallurgical mining. Storage: Care should be taken to prevent moisture and rain exposure, as well as to avoid caking; if caking occurs, crushing or dissolving it does not affect its effectiveness ； This product is non-toxic and harmless; it does not deteriorate over time, and it is not a flammable or explosive hazardous material.