drying of phosphoric acid sludge

In a wet phosphoric acid purification unit with an annular throughput of approximately 100,000 tons H 3 PO 4, the quantity of sludge obtained per year will be about 50,000 tons. According to the present state of engineering technology, there is no alternative but to dump this sludge.

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  • Production of technical grade phosphoric acid from

    Production of technical grade phosphoric acid from

    The recovery of phosphorus from sewage sludge ash samples obtained from 7 operating sludge incinerators in the UK using a sulfuric acid washing procedure to produce a technical grade phosphoric acid product has been investigated. The influences of reaction time, sulfuric acid concentration, liquid to solid ratio and source of ISSA on P recovery ...

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  • Solar drying and thermodynamic sorption properties of

    Solar drying and thermodynamic sorption properties of

    Apr 18, 2021 Compared to the drying of natural phosphate, which is an operation commonly used before phosphoric acid and fertilizers production, this operation consumes nearly 10 L of fuel per ton of sludge. While, the production is growing to 8,500 tons/day, and at 549 dollars/ton-fuel, the energy cost comes to more than 1.7 M dollars/year.

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  • Phosphoric acid purification sludge Potential in heavy

    Phosphoric acid purification sludge Potential in heavy

    Jan 01, 2019 The thermal process produces a pure phosphoric acid (PA), but consumes large amounts of energy. The manufacture of wet phosphoric acid (WPA), which is known as the most economical and developed way in the world, according to a chemical reaction of the phosphate rock with a mineral acid (nitric, hydrochloric or sulfuric) (Becker, 1989).

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  • USE OF PAPERMAKING SLUDGE AS NEW MATERIAL.

    USE OF PAPERMAKING SLUDGE AS NEW MATERIAL.

    drying of granulated sludge, using it together with mud for the construction of communication tunnels, and using paper- ... Also, calcium carbonate reacts with phosphoric acid to form phosphoric acid calcium (apatite). This calcium carbon- ate can adsorb and remove the phosphoric acid ion that zeolite

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  • PDF Production of technical grade phosphoric acid from

    PDF Production of technical grade phosphoric acid from

    Aug 01, 2010 P can be recovered from sewage sludge as phosphoric acid by using sulfuric acid [2], but drying the sludge and using a large amount of commercial acid is …

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  • Phosphoric Acid Production Industrial Wastes

    Phosphoric Acid Production Industrial Wastes

    Dec 05, 2020 Mist and gaseous emissions from the gypsum filter, the phosphoric acid concentrator, and the acidulation off-gas are controlled with scrubbers or other equipment. The preparation of the phosphate ore generates dust from drying and grinding operations, and this is generally controlled with a combination of dry cyclones and wet scrubbers [21].

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  • Characteristic of wet method of phosphorus recovery from

    Characteristic of wet method of phosphorus recovery from

    Jan 01, 2016 Sewage Sludge Ash (SSA) is a concentrated source of phosphorus and can be successfully recycled via a number of different routes. This paper presents research results on phosphorus recovery from differently combusted sewage sludge with the use of nitric acid extraction. Different SSA forms from Polish thermal utilization stations were compared. It was revealed that …

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  • PDF Solid liquid separation techniques for efficient

    PDF Solid liquid separation techniques for efficient

    Phosphoric acid sludge is one of the prominent problems in the phosphate industry. Its production is co-occurred by large losses of P2O5 that affect the process performance.

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  • Sureflo Techcon Pvt Ltd Sludge Processing

    Sureflo Techcon Pvt Ltd Sludge Processing

    Sep 09, 2021 Sludge drying. Sludge drying - Home Introduction to sludge drying Properties of drying sludge Sludge drying operation Sludge dryer configurations Conductive sludge dryers ... phosphoric acid tanks, lagoons, firewater ponds & ETP tanks, in online condition with no man entry.

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  • US3457061A Utilization of phosphoric acid sludge

    US3457061A Utilization of phosphoric acid sludge

    sludge acid phosphoric acid solids evaporator Prior art date 1965-03-29 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number

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  • 11.21 Phosphate Rock Processing

    11.21 Phosphate Rock Processing

    process, rock is ground in a wet slurry and then added directly to wet process phosphoric acid reactors without drying. A typical 45 Mg/hr (50 ton/hr) calciner will discharge about 13 to 27 dry normal m3/sec (30,000 to 60,000 dscfm) of exhaust gas, with a PM loading of 0.5 to 5 gr/dscf. As with dryers,

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  • Treatment of phosphoric acid sludge for rare earths

    Treatment of phosphoric acid sludge for rare earths

    During the phosphoric acid evaporation process, some solids precipitate forming a sludge of about 20% solids. Among the phosphate mining and processing streams,

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  • Phosphoric Tank Sludge Cleaning Services

    Phosphoric Tank Sludge Cleaning Services

    Cleaning of phosphoric acid lagoons using Sureflo Floating Robots: Sureflo Floating Robots – FR series are designed to handle PA sludge removal and recycling for sludge accumulated in lagoons. These robots are operated using a remote control and come with pumping flow rate of 50 m3/hr to 300 m3/hr. Sludge once pumped out of the lagoon can be ...

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