3 results about "Extraction ratio" patented technology

The invention discloses a method for extracting iron from iron tailing, comprising following steps: (1) adding water into iron tailing to be mixed into ore pulp; (2) ultra-fine processing said ore pulp; (3) adding organic acid or its salt into ore pulp after step (2) for magnetic selection in the magnetic separator. The invention is a new clean producing ore selection process with lower cost and high extraction rate while extracted iron has high grade. Therefore, the invention has higher technique and economic value, which can improve the ore selection level, economic benefit, release the lack of iron rich ore, to reduce the power consumption of steel manufacture and generate large benefit to corporation.

The invention provides a system and method for extracting lignin in papermaking black liquid. The system comprises a feeding unit, an ultrafiltration unit, a nanofiltration unit and a water producingunit which are connected in sequence. The system is used for extracting the lignin in the papermaking black liquid, so that the extraction rate of the lignin in the papermaking black liquid reaches 100%, and the purity of the purified lignin can reach 98%. Building of a large quantity useless equipment and energy consumption are avoided, the aim of efficient, stable and low-cost extraction is achieved, the lignin with the molecular weight of 20000 or above and the molecular weight of 200-400 with pigments can be separated in the separation process, the aims of layered collection and precise treatment are achieved, and a very good separation effect is achieved. Meanwhile, compared with generalized channels such as application to a low-grade adhesive, the solid content of the black liquid can be concentrated to 24% from 8%, and the system and method have good application prospects in industrial production and application.