公开(公告)号：EP0216002A3

公开(公告)日：1989-05-31

申请号：EP86103144.1

申请日：1986-03-08

Applicant: GEORGIA KAOLIN COMPANY, INC.

Inventor： Shiftlet, Wayne Merle

IPC: C01F11/18 ,  B03B9/00 ,  B03D1/02 ,  B03D1/00

CPC classification number: B03D1/02 ,  B03B9/00 ,  B03D1/016 ,  B03D2201/005 ,  B03D2203/10 ,  C01F11/185 ,  C01P2004/61 ,  D21H17/67 ,  D21H17/675 ,  D21H19/385 ,  D21H21/52

Abstract: A slurry (3) of ground calcite ore in water is subjected to a froth flotation (30) wherein acid insoluble impurities are removed. The flotation process is enhanced by a two-stage pre-flotation conditioning accomplished by adding an acetate salt of a tall oil based imidazoline (5) to the slurry (3) and then mixing a nonpolar hydrocarbon oil (7) into the imidazoline treated slurry. The purified underflow calcium carbonate slurry (11) from the froth flotation is first dewatered to a solids content of 80% to 90% by weight. then reslurried with a dispersing agent (40) and subjected at a solids content of at least 75% by weight to a multi-stage media grinding process (60, 70, 80) wherein each grinding stage is charged with progressively finer grinding media. After degritting, the ground calcium carbonate slurry (17) is ready for shipment as a paper filler-grade product slurry (19) without further dewatering. Alternatively, the product slurry (19) may be passed through an additional fine media grinding stage (100) to-produce a paper coating-grade product slurry (21) also ready for shipment without further dewatering.

公开(公告)号：EP0216002A2

公开(公告)日：1987-04-01

申请号：EP86103144.1

申请日：1986-03-08

Applicant: GEORGIA KAOLIN COMPANY, INC.

Inventor： Shiftlet, Wayne Merle

IPC: C01F11/18 ,  B03B9/00 ,  B03D1/02 ,  B03D1/00

CPC classification number: B03D1/02 ,  B03B9/00 ,  B03D1/016 ,  B03D2201/005 ,  B03D2203/10 ,  C01F11/185 ,  C01P2004/61 ,  D21H17/67 ,  D21H17/675 ,  D21H19/385 ,  D21H21/52

Abstract: A slurry (3) of ground calcite ore in water is subjected to a froth flotation (30) wherein acid insoluble impurities are removed. The flotation process is enhanced by a two-stage pre-flotation conditioning accomplished by adding an acetate salt of a tall oil based imidazoline (5) to the slurry (3) and then mixing a nonpolar hydrocarbon oil (7) into the imidazoline treated slurry. The purified underflow calcium carbonate slurry (11) from the froth flotation is first dewatered to a solids content of 80% to 90% by weight. then reslurried with a dispersing agent (40) and subjected at a solids content of at least 75% by weight to a multi-stage media grinding process (60, 70, 80) wherein each grinding stage is charged with progressively finer grinding media. After degritting, the ground calcium carbonate slurry (17) is ready for shipment as a paper filler-grade product slurry (19) without further dewatering. Alternatively, the product slurry (19) may be passed through an additional fine media grinding stage (100) to-produce a paper coating-grade product slurry (21) also ready for shipment without further dewatering.

Abstract translation: 在水中的方解石矿石浆液（3）进行泡沫浮选（30），其中除去不溶于酸的杂质。 浮选过程通过将两种阶段的预浮选条件通过将妥尔油基咪唑啉（5）的乙酸盐加入到浆料（3）中，然后将非极性烃油（7）混合到咪唑啉处理的浆料中而得到增强。 首先将来自泡沫浮选的净化的下流碳酸钙浆料（11）脱水至固体含量为80重量％至90重量％，然后用分散剂（40）再浆化，并以固体含量为至少75％，通过 对于多阶段介质研磨工艺（60,70,80），其中每个研磨阶段装有逐渐变细的研磨介质。 在研磨后，研磨的碳酸钙浆料（17）可作为纸填料级产品浆料（19）进行运输，而不进一步脱水。 或者，产品浆料（19）可以通过另外的细介质研磨阶段（100）以产生也可以进行装运的纸涂层级产品浆料（21），而不进一步脱水。